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Sepúlveda-Espinoza F, Cofré-Serrano A, Veloso-Valeria T, Quesada-Calderon S, Guillemin ML. Characterization of the organellar genomes of Mazzaella laminarioides and Mazaella membranacea (Gigartinaceae, Rhodophyta). JOURNAL OF PHYCOLOGY 2024. [PMID: 38944824 DOI: 10.1111/jpy.13478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 05/08/2024] [Accepted: 05/28/2024] [Indexed: 07/02/2024]
Abstract
Mazzaella, a genus with no genomic resources available, has extensive distribution in the cold waters of the Pacific, where they represent ecologically and economically important species. In this study, we aimed to sequence, assemble, and annotate the complete mitochondrial and chloroplast genomes from two Mazzaella spp. and characterize the intraspecific variation among them. We report for the first time seven whole organellar genomes (mitochondria: OR915856, OR947465, OR947466, OR947467, OR947468, OR947469, OR947470; chloroplast: OR881974, OR909680, OR909681, OR909682, OR909683, OR909684, OR909685) obtained through high-throughput sequencing for six M. laminarioides sampled from three Chilean regions and one M. membranacea. Sequenced Mazzaella mitogenomes have identical gene number, gene order, and genome structure. The same results were observed for assembled plastomes. A total of 52 genes were identified in mitogenomes, and a total of 235 genes were identified in plastomes. Although the M. membranacea plastome included a full-length pbsA gene, in all M. laminarioides samples, the pbsA gene was split in three open reading frames (ORFs). Within M. laminarioides, we observed important plastome lineage-specific variations, such as the pseudogenization of the two hypothetical protein-coding genes, ycf23 and ycf45. Nonsense mutations in the ycf23 and ycf45 genes were only detected in the northern lineage. These results are consistent with phylogenetic reconstructions and divergence time estimation using concatenated coding sequences that not only support the monophyly of M. laminarioides but also underscore that the three M. laminarioides lineages are in an advanced stage of divergence. These new results open the question of the existence of still undisclosed species in M. laminarioides.
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Affiliation(s)
- Francisco Sepúlveda-Espinoza
- Facultad de Ciencias, Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
- Laboratorio de Epigenética Vegetal, Facultad de Ciencias Forestales, Universidad de Concepción, Concepción, Chile
| | - Angela Cofré-Serrano
- Facultad de Ciencias, Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
| | - Tomás Veloso-Valeria
- Facultad de Ciencias, Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
| | - Suany Quesada-Calderon
- Facultad de Ciencias, Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
- AUSTRAL-Omics, Vicerrectoría de Investigación, desarrollo y creación artística (VIDCA), Universidad Austral de Chile, Valdivia, Chile
| | - Marie-Laure Guillemin
- Facultad de Ciencias, Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
- Núcleo Milenio MASH, Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
- Centro FONDAP de Investigación en Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
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2
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Huanel OR, Montecinos AE, Sepúlveda-Espinoza F, Guillemin ML. Impact of persistent barrier to gene flow and catastrophic events on red algae evolutionary history along the Chilean coast. Front Genet 2024; 15:1336427. [PMID: 38525243 PMCID: PMC10957783 DOI: 10.3389/fgene.2024.1336427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/23/2024] [Indexed: 03/26/2024] Open
Abstract
Historical vicariance events, linked to the existence of stable physical barriers to gene flow, generate concordant genetic breaks in co-distributed species while stochastic processes (e.g., costal uplift) could cause species-specific genetic breaks as a result of local strong demographic bottlenecks or extinction. In Chile, previous studies show that the area of the 30°S-33°S could correspond to a stable barrier to gene flow that have affected the genetic structure of various algae and marine invertebrates. Here we sequenced two organellar genes (COI and rbcL) in four taxonomically accepted co-distributed red seaweeds species characterized by a low dispersal potential: Mazzaella laminarioides, M. membranacea, Asterfilopsis disciplinalis, and Ahnfeltiopsis vermicularis. Our results revealed the existence of ten strongly differentiated linages in the taxa studied. Strong genetic breaks, concordant in both space and time (divergence estimated to have occurred some 2.9-12.4 million years ago), were observed between taxa distributed across the 33°S. Conversely, in the Central/South part of the Chilean coast, the localization of the genetic breaks/sub-structure observed varied widely (36°S, 38°S, 39°S, and 40°S). These results suggest that a major historical vicariance event has modeled the genetic structure of several Chilean marine organisms in the north of the Chilean coast during the mid-Miocene, while more recent stochastic events and genetic drift could be the driving forces of genetic divergence/structuration in the central-southern part of the coast.
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Affiliation(s)
- Oscar R. Huanel
- Núcleo Milenio MASH, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
- IRL 3614 Evolutionary Biology and Ecology of Algae, Centre National de la Recherche Scientifique (CNRS), Sorbonne Université, Pontificia Universidad Católica de Chile, Universidad Austral de Chile, Station Biologique, Roscoff, France
- GEMA Center for Genomics, Ecology and Environment, Universidad Mayor, Santiago, Chile
| | - Alejandro E. Montecinos
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Francisco Sepúlveda-Espinoza
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Marie-Laure Guillemin
- IRL 3614 Evolutionary Biology and Ecology of Algae, Centre National de la Recherche Scientifique (CNRS), Sorbonne Université, Pontificia Universidad Católica de Chile, Universidad Austral de Chile, Station Biologique, Roscoff, France
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
- Núcleo Milenio MASH, Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
- Centro FONDAP de Investigación de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
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3
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Assis J, Alberto F, Macaya EC, Castilho Coelho N, Faugeron S, Pearson GA, Ladah L, Reed DC, Raimondi P, Mansilla A, Brickle P, Zuccarello GC, Serrão EA. Past climate-driven range shifts structuring intraspecific biodiversity levels of the giant kelp (Macrocystis pyrifera) at global scales. Sci Rep 2023; 13:12046. [PMID: 37491385 PMCID: PMC10368654 DOI: 10.1038/s41598-023-38944-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 07/17/2023] [Indexed: 07/27/2023] Open
Abstract
The paradigm of past climate-driven range shifts structuring the distribution of marine intraspecific biodiversity lacks replication in biological models exposed to comparable limiting conditions in independent regions. This may lead to confounding effects unlinked to climate drivers. We aim to fill in this gap by asking whether the global distribution of intraspecific biodiversity of giant kelp (Macrocystis pyrifera) is explained by past climate changes occurring across the two hemispheres. We compared the species' population genetic diversity and structure inferred with microsatellite markers, with range shifts and long-term refugial regions predicted with species distribution modelling (SDM) from the last glacial maximum (LGM) to the present. The broad antitropical distribution of Macrocystis pyrifera is composed by six significantly differentiated genetic groups, for which current genetic diversity levels match the expectations of past climate changes. Range shifts from the LGM to the present structured low latitude refugial regions where genetic relics with higher and unique diversity were found (particularly in the Channel Islands of California and in Peru), while post-glacial expansions following ~ 40% range contraction explained extensive regions with homogenous reduced diversity. The estimated effect of past climate-driven range shifts was comparable between hemispheres, largely demonstrating that the distribution of intraspecific marine biodiversity can be structured by comparable evolutionary forces across the global ocean. Additionally, the differentiation and endemicity of regional genetic groups, confers high conservation value to these localized intraspecific biodiversity hotspots of giant kelp forests.
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Affiliation(s)
- Jorge Assis
- CCMAR, CIMAR, Universidade do Algarve, Gambelas, Faro, Portugal.
- Faculty of Bioscience and Aquaculture, Nord Universitet, Bodø, Norway.
| | - Filipe Alberto
- Department of Biological Sciences, University of Wisconsin, Milwaukee, USA
| | - Erasmo C Macaya
- Centro Fondap IDEAL and Departamento de Oceanografía, Universidad de Concepción, Concepción, Chile
| | - Nelson Castilho Coelho
- CCMAR, CIMAR, Universidade do Algarve, Gambelas, Faro, Portugal
- University of Pittsburgh School of Medicine, Pittsburgh, USA
| | - Sylvain Faugeron
- Núcleo Milenio MASH and IRL3614 Evolutionary Biology and Ecology of Algae, Facultad de Ciencias Biológicas, CNRS, Sorbonne Université, Universidad Austral de Chile, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | | | - Lydia Ladah
- Departamento de Oceanografía Biológica, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, Mexico
| | - Daniel C Reed
- Marine Science Institute, University of California Santa Barbara, Santa Barbara, USA
| | | | - Andrés Mansilla
- Cape Horn International Center (CHIC), Universidad de Magallanes, Punta Arenas, Chile
| | - Paul Brickle
- South Atlantic Environmental Research Institute, Stanley, Falkland Islands
| | - Giuseppe C Zuccarello
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Ester A Serrão
- CCMAR, CIMAR, Universidade do Algarve, Gambelas, Faro, Portugal
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Contreras-Porcia L, Meynard A, Piña F, Kumar M, Lovazzano C, Núñez A, Flores-Molina MR. Desiccation Stress Tolerance in Porphyra and Pyropia Species: A Latitudinal Analysis along the Chilean Coast. PLANTS (BASEL, SWITZERLAND) 2022; 12:12. [PMID: 36616141 PMCID: PMC9824847 DOI: 10.3390/plants12010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
One of the most important factors regulating the distribution and abundance of seaweeds is desiccation, triggered mainly by tidal changes and climatic variation. Porphyra and Pyropia species have evolved multiple strategies to tolerate desiccation stress; however, how these tolerance strategies differ in these species inhabiting different latitudes is still unknown. In this context, we analyzed, in situ, the physiological responses of these species (collected from 18° S to 41° S along the Chilean coast) to desiccation stress using biochemical and molecular analyses. The hyper-arid terrestrial climate of northern Chile, with high evaporation and lack of constant rain determines a very steep increase in desiccation stress in the upper intertidal during low tide for these species. Accordingly, the results showed that, in comparison with the southernmost populations, the Porphyra/Pyropia species from the north zone of Chile (18°-30° S) exhibited higher contents of lipoperoxide and carbonyls (1.6-1.9 fold) together with higher enzymatic activities, including ascorbate peroxidase, catalase, peroxiredoxin, and thioredoxin (2-3-fold). In addition, a substantial expression of cat, prx, and trx transcripts during desiccation was demonstrated, mainly in the northernmost populations. These results provide evidence of (i) significant activation of antioxidant enzymes and transcripts (principally cat and prx); (ii) participation of phenolic antioxidant compounds as a highly plastic physiological strategy to cope with desiccation; and (iii) the activation of the tolerance responses was affected by species latitudinal distribution. Thus, for the first time, this study integrated the biochemical and genetic responses of diverse Porphyra/Pyropia species to better understand their physiological dynamics of tolerance over a wide latitudinal range.
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Affiliation(s)
- Loretto Contreras-Porcia
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370251, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay 2531015, Chile
- Center of Applied Ecology and Sustainability (CAPES), Santiago 8331150, Chile
- Instituto Milenio en Socio-Ecología Costera (SECOS), Santiago 8370251, Chile
| | - Andrés Meynard
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370251, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay 2531015, Chile
- Center of Applied Ecology and Sustainability (CAPES), Santiago 8331150, Chile
- Instituto Milenio en Socio-Ecología Costera (SECOS), Santiago 8370251, Chile
| | - Florentina Piña
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370251, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay 2531015, Chile
- Center of Applied Ecology and Sustainability (CAPES), Santiago 8331150, Chile
- Instituto Milenio en Socio-Ecología Costera (SECOS), Santiago 8370251, Chile
| | - Manoj Kumar
- Climate Change Cluster, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Carlos Lovazzano
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5110566, Chile
- Millennium Institute for Integrative Biology (iBio), Santiago 8331150, Chile
| | - Alejandra Núñez
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370251, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay 2531015, Chile
- Center of Applied Ecology and Sustainability (CAPES), Santiago 8331150, Chile
- Instituto Milenio en Socio-Ecología Costera (SECOS), Santiago 8370251, Chile
| | - María Rosa Flores-Molina
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago 8370251, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay 2531015, Chile
- Center of Applied Ecology and Sustainability (CAPES), Santiago 8331150, Chile
- Instituto Milenio en Socio-Ecología Costera (SECOS), Santiago 8370251, Chile
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5
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Almeida SC, Neiva J, Sousa F, Martins N, Cox CJ, Melo-Ferreira J, Guiry MD, Serrão EA, Pearson GA. A low-latitude species pump: Peripheral isolation, parapatric speciation and mating-system evolution converge in a marine radiation. Mol Ecol 2022; 31:4797-4817. [PMID: 35869812 DOI: 10.1111/mec.16623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 07/06/2022] [Accepted: 07/14/2022] [Indexed: 11/27/2022]
Abstract
Geologically recent radiations can shed light on speciation processes, but incomplete lineage sorting and introgressive gene flow render accurate evolutionary reconstruction and interpretation challenging. Independently evolving metapopulations of low dispersal taxa may provide an additional level of phylogeographic information, given sufficiently broad sampling and genome-wide sequencing. Evolution in the marine brown algal genus Fucus in the south-eastern North Atlantic was shaped by Quaternary climate-driven range shifts. Over this timescale, divergence and speciation occurred against a background of expansion-contraction cycles from multiple refugia, together with mating-system shifts from outcrossing (dioecy) to selfing hermaphroditism. We tested the hypothesis that peripheral isolation of range edge (dioecious) F. vesiculosus led to parapatric speciation and radiation of hermaphrodite lineages. Species tree methods using 876 single-copy nuclear genes and extensive geographic coverage produced conflicting topologies with respect to geographic clades of F. vesiculosus. All methods, however, revealed a new and early diverging hermaphrodite species, Fucus macroguiryi sp. nov. Both the multispecies coalescent and polymorphism-aware models (in contrast to concatenation) support sequential paraphyly in F. vesiculosus resulting from distinct evolutionary processes. Our results support (1) peripheral isolation of the southern F. vesiculosus clade prior to parapatric speciation and radiation of hermaphrodite lineages-a "low-latitude species pump". (2) Directional introgressive gene flow into F. vesiculosus around the present-day secondary contact zone (sympatric-allopatric boundary) between dioecious/hermaphrodite lineages as hermaphrodites expanded northwards, supported by concordance analysis and statistical tests of introgression. (3) Species boundaries in the extensive sympatric range are probably maintained by reproductive system (selfing in hermaphrodites) and reinforcement.
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Affiliation(s)
- Susana C Almeida
- Centre of Marine Sciences, Universidade do Algarve, Faro, Portugal
| | - João Neiva
- Centre of Marine Sciences, Universidade do Algarve, Faro, Portugal
| | - Filipe Sousa
- Centre of Marine Sciences, Universidade do Algarve, Faro, Portugal
- cE3c - Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Neusa Martins
- Centre of Marine Sciences, Universidade do Algarve, Faro, Portugal
| | - Cymon J Cox
- Centre of Marine Sciences, Universidade do Algarve, Faro, Portugal
| | - José Melo-Ferreira
- CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Universidade do Porto, Campus de Vairão, R. Padre Armando Quintas, Vairão, Portugal
- Departamento de Biologia, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre s/n, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, Vairão, Portugal
| | - Michael D Guiry
- AlgaeBase, Ryan Institute, National University of Ireland, Galway, Ireland
| | - Ester A Serrão
- Centre of Marine Sciences, Universidade do Algarve, Faro, Portugal
| | - Gareth A Pearson
- Centre of Marine Sciences, Universidade do Algarve, Faro, Portugal
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Saenz‐Agudelo P, Peluso L, Nespolo R, Broitman BR, Haye PA, Lardies MA. Population genomic analyses reveal hybridization and marked differences in genetic structure of
Scurria
limpet sister species with parapatric distributions across the South Eastern Pacific. Ecol Evol 2022; 12:e8888. [PMID: 35571762 PMCID: PMC9078047 DOI: 10.1002/ece3.8888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 03/30/2022] [Accepted: 04/08/2022] [Indexed: 11/08/2022] Open
Affiliation(s)
- Pablo Saenz‐Agudelo
- Instituto de Ciencias Ambientales y Evolutivas Universidad Austral de Chile Valdivia Chile
- ANID‐ Millennium Science Initiative Nucleus (NUTME) Las Cruces Chile
| | - Lívia Peluso
- Instituto de Ciencias Ambientales y Evolutivas Universidad Austral de Chile Valdivia Chile
- Doctorado en Ciencias Mención Ecología y Evolución Escuela de Graduados Facultad de Ciencias Universidad Austral de Chile Valdivia Chile
| | - Roberto Nespolo
- Instituto de Ciencias Ambientales y Evolutivas Universidad Austral de Chile Valdivia Chile
- ANID‐ Millennium Science Initiative Nucleus (LiLi) Valdivia Chile
- Center for Applied Ecology and Sustainability (CAPES) Santiago Chile
- Millennium Institute for Integrative Biology (iBio) Santiago Chile
| | - Bernardo R. Broitman
- Departamento de Ciencias Facultad de Artes Liberales Universidad Adolfo Ibañez Santiago Chile
- ANID‐ Millennium Science Initiative Nucleus UPWELL Santiago Chile
- Instituto Milenio en Socio‐Ecología Costera (SECOS) Santiago Chile
| | - Pilar A. Haye
- Instituto Milenio en Socio‐Ecología Costera (SECOS) Santiago Chile
- Departamento de Biología Marina Universidad Católica del Norte Coquimbo Chile
| | - Marco A. Lardies
- Departamento de Ciencias Facultad de Artes Liberales Universidad Adolfo Ibañez Santiago Chile
- Instituto Milenio en Socio‐Ecología Costera (SECOS) Santiago Chile
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7
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Mmonwa KL, Barker NP, McQuaid CD, Teske PR. Coastal dunefields maintain pre-Holocene genetic structure in a rocky shore red alga. JOURNAL OF PHYCOLOGY 2021; 57:1542-1553. [PMID: 33982309 DOI: 10.1111/jpy.13182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 04/20/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
Most intertidal algae have limited dispersal potential, and areas that lack hard substratum suitable for attachment are thus expected to isolate regional populations from each other. Here, we used nuclear and mitochondrial genetic data to compare genetic structure in two co-distributed intertidal red algae with different dispersal potential along the South African coastline. Gelidium pristoides is divided into a south-eastern and a south-western evolutionary lineage separated by extensive, continuous sandy shoreline habitat adjacent to coastal dunefields. In contrast, Hypnea spicifera is genetically homogeneous throughout its range. In G. pristoides, the genetic breaks are associated with contemporary coastal dunefields. The age of the divergence event suggests that this may reflect the effect of older dispersal barriers, and that genetic structure was subsequently maintained by the formation of contemporary coastal dunefields.
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Affiliation(s)
- Kolobe Lucas Mmonwa
- Research and Monitoring, KwaZulu-Natal Sharks Board, Umhlanga Rocks, South Africa
| | - Nigel Paul Barker
- Department of Plant and Soil Sciences, University of Pretoria, Hatfield, South Africa
| | - Christopher David McQuaid
- Coastal Research Group, Department of Zoology and Entomology, Rhodes University, Grahamstown, South Africa
| | - Peter Rodja Teske
- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, University of Johannesburg, Auckland Park, 2006, South Africa
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Márquez F, Trovant B, Van der Molen S, Sepúlveda RD, Doña J, Johnson KP, Vierna J. Two evolutionary units on the South American razor clam Ensis macha (Bivalvia: Pharidae): genetic and morphometric evidence. ORG DIVERS EVOL 2020. [DOI: 10.1007/s13127-020-00441-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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9
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Segovia NI, González-Wevar CA, Haye PA. Signatures of local adaptation in the spatial genetic structure of the ascidian Pyura chilensis along the southeast Pacific coast. Sci Rep 2020; 10:14098. [PMID: 32839518 PMCID: PMC7445245 DOI: 10.1038/s41598-020-70798-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 07/21/2020] [Indexed: 11/25/2022] Open
Abstract
The highly heterogeneous Humboldt Current System (HCS) and the 30°S transition zone on the southeast Pacific coast, represent an ideal scenario to test the influence of the environment on the spatial genomic structure in marine near-shore benthic organisms. In this study, we used seascape genomic tools to evaluate the genetic structure of the commercially important ascidian Pyura chilensis, a species that exhibits a low larval transport potential but high anthropogenic dispersal. A recent study in this species recorded significant genetic differentiation across a transition zone around 30°S in putatively adaptive SNPs, but not in neutral ones, suggesting an important role of environmental heterogeneity in driving genetic structure. Here, we aim to understand genomic-oceanographic associations in P. chilensis along the Southeastern Pacific coast using two combined seascape genomic approaches. Using 149 individuals from five locations along the HCS, a total of 2,902 SNPs were obtained by Genotyping-By-Sequencing, of which 29–585 were putatively adaptive loci, depending on the method used for detection. In adaptive loci, spatial genetic structure was better correlated with environmental differences along the study area (mainly to Sea Surface Temperature, upwelling-associated variables and productivity) than to the geographic distance between sites. Additionally, results consistently showed the presence of two groups, located north and south of 30°S, which suggest that local adaptation processes seem to allow the maintenance of genomic differentiation and the spatial genomic structure of the species across the 30°S biogeographic transition zone of the Humboldt Current System, overriding the homogenizing effects of gene flow.
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Affiliation(s)
- Nicolás I Segovia
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile.,Departamento de Ciencias Ecológicas, Facultad de Ciencias, Instituto de Ecología Y Biodiversidad IEB, Universidad de Chile, Santiago, Chile
| | - Claudio A González-Wevar
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Instituto de Ecología Y Biodiversidad IEB, Universidad de Chile, Santiago, Chile.,Instituto de Ciencias Marinas Y Limnológicas (ICML), Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile.,Centro FONDAP de Investigaciones en Dinámica de Ecosistemas de Altas Latitudes (IDEAL), Universidad Austral de Chile, Valdivia, Chile
| | - Pilar A Haye
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile.
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Ayres-Ostrock LM, Valero M, Mauger S, Oliveira MC, Plastino EM, Guillemin ML, Destombe C. Dual influence of terrestrial and marine historical processes on the phylogeography of the Brazilian intertidal red alga Gracilaria caudata. JOURNAL OF PHYCOLOGY 2019; 55:1096-1114. [PMID: 31206679 DOI: 10.1111/jpy.12892] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 05/24/2019] [Indexed: 06/09/2023]
Abstract
In this study, we explored how past terrestrial and marine climate changes have interacted to shape the phylogeographic patterns of the intertidal red seaweed Gracilaria caudata, an economically important species exploited for agar production in the Brazilian north-east. Seven sites were sampled along the north-east tropical and south-east sub-tropical Brazilian coast. The genetic diversity and structure of G. caudata was inferred using a combination of mitochondrial (COI and cox2-3), chloroplast (rbcL) and 15 nuclear microsatellite markers. A remarkable congruence between nuclear, mitochondrial and chloroplast data revealed clear separation between the north-east (from 03° S to 08° S) and the south-east (from 20° S to 23° S) coast of Brazil. These two clades differ in their demographic histories, with signatures of recent demographic expansions in the north-east and divergent populations in the south-east, suggesting the maintenance of several refugia during the last glacial maximum due to sea-level rise and fall. The Bahia region (around 12° S) occupies an intermediate position between both clades. Microsatellites and mtDNA markers showed additional levels of genetic structure within each sampled site located south of Bahia. The separation between the two main groups in G. caudata is likely recent, probably occurring during the Quaternary glacial cycles. The genetic breaks are concordant with (i) those separating terrestrial refugia, (ii) major river outflows and (iii) frontiers between tropical and subtropical regions. Taken together with previously published eco-physiological studies that showed differences in the physiological performance of the strains from distinct locations, these results suggest that the divergent clades in G. caudata correspond to distinct ecotypes in the process of incipient speciation and thus should be considered for the management policy of this commercially important species.
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Affiliation(s)
- Lígia M Ayres-Ostrock
- Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, CEP: 05508-090, São Paulo, SP, Brazil
| | - Myriam Valero
- CNRS, Sorbonne Université, UMI 3614, Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, 29688, Roscoff, France
| | - Stéphane Mauger
- CNRS, Sorbonne Université, UMI 3614, Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, 29688, Roscoff, France
| | - Mariana C Oliveira
- Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, CEP: 05508-090, São Paulo, SP, Brazil
| | - Estela M Plastino
- Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, CEP: 05508-090, São Paulo, SP, Brazil
| | - Marie-Laure Guillemin
- CNRS, Sorbonne Université, UMI 3614, Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, 29688, Roscoff, France
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Christophe Destombe
- CNRS, Sorbonne Université, UMI 3614, Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, 29688, Roscoff, France
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11
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Rosenfeld S, Mendez F, Calderon MS, Bahamonde F, Rodríguez JP, Ojeda J, Marambio J, Gorny M, Mansilla A. A new record of kelp Lessonia spicata (Suhr) Santelices in the Sub-Antarctic Channels: implications for the conservation of the "huiro negro" in the Chilean coast. PeerJ 2019; 7:e7610. [PMID: 31579579 PMCID: PMC6754978 DOI: 10.7717/peerj.7610] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 08/05/2019] [Indexed: 11/23/2022] Open
Abstract
The Katalalixar National Reserve (KNR) lies in an isolated marine protected area of Magellan Sub-Antarctic channels, which represent an important area for marine biodiversity and macroalgal conservation. The present study is the first report of the species Lessonia spicata, “huiro negro”, in the Magellan Sub-Antarctic channels. This finding has implications for macroalgal biogeography and conservation concerns in the Chilean coast. In the ecological assessments of the KNR in 2018 we found populations of L. spicata, specifically on rocky shores of Torpedo Island and Castillo Channel. The morphological identification and molecular phylogeny based on nuclear (ITS1) sequences revealed that these populations of Lessonia are within the lineage of L. spicata of central Chile. This report increases the species richness of kelps for the Magellan Sub-Antarctic Channels from two to three confirmed species (L. flavicans, L. searlesiana and L. spicata), and it also extends the southern distribution range of L. spicata. This species has high harvest demand and is moving towards southern Chile; thus, these populations should be considered as essential for macroalgal conservation in high latitudes of South America.
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Affiliation(s)
- Sebastián Rosenfeld
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos, Universidad de Magallanes, Punta Arenas, Chile.,Instituto de Ecología y Biodiversidad, Santiago, Chile
| | - Fabio Mendez
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos, Universidad de Magallanes, Punta Arenas, Chile.,Programa de Doctorado en Ciencias Antárticas y Subantarticas de la Universidad de Magallanes, Universidad de Magallanes, Punta Arenas, Chile
| | - Martha S Calderon
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos, Universidad de Magallanes, Punta Arenas, Chile.,Instituto de Ecología y Biodiversidad, Santiago, Chile.,Instituto de Investigación para el Desarrollo Sustentable de Ceja de Selva, INDES-CES, Universidad Nacional Toribio Rodríguez de Mendoza, Chachapoyas, Peru
| | - Francisco Bahamonde
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos, Universidad de Magallanes, Punta Arenas, Chile.,Departamento de Ciencias y Recursos Naturales de la Facultad de Ciencias, Universidad de Magallanes, Punta Arenas, Chile
| | - Juan Pablo Rodríguez
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos, Universidad de Magallanes, Punta Arenas, Chile
| | - Jaime Ojeda
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos, Universidad de Magallanes, Punta Arenas, Chile.,Instituto de Ecología y Biodiversidad, Santiago, Chile.,School of Environmental Studies, University of Victoria, Victoria, Canada
| | - Johanna Marambio
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos, Universidad de Magallanes, Punta Arenas, Chile.,Instituto de Ecología y Biodiversidad, Santiago, Chile.,Science Faculty, Universität Bremen, Bremen, Germany
| | | | - Andrés Mansilla
- Laboratorio de Ecosistemas Marinos Antárticos y Subantárticos, Universidad de Magallanes, Punta Arenas, Chile.,Instituto de Ecología y Biodiversidad, Santiago, Chile
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12
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Meynard A, Zapata J, Salas N, Betancourtt C, Pérez-Lara G, Castañeda F, Ramírez ME, Bulboa Contador C, Guillemin ML, Contreras-Porcia L. Genetic and morphological differentiation of Porphyra and Pyropia species (Bangiales, Rhodophyta) coexisting in a rocky intertidal in Central Chile. JOURNAL OF PHYCOLOGY 2019; 55:297-313. [PMID: 30570145 DOI: 10.1111/jpy.12829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 08/16/2018] [Indexed: 06/09/2023]
Abstract
A recent molecular taxonomic study along the Chilean coast (18° S-53° S) described 18 candidate species of bladed Bangiales of which only two were formally described. Few studies focused on local genetic and morphological diversity of bladed Bangiales and attempted to determine their intertidal distribution in contrasting habitats, and none were performed in Chile. To delimit intertidal distributions of genetic species, 66 samples of bladed Bangiales were collected at Maitencillo (32° S) in four zones: a rocky platform, a rocky wall, and two boulders zones surrounded by sandy and rocky bottoms, respectively. These samples were identified based on sequences of the mitochondrial COI and chloroplast rbcL markers. We also collected 87 specimens for morphological characterization of the most common species, rapidly assessing their putative species identity using newly developed species-diagnostic (PCR-RFLP) markers. Eight microscopic and two macroscopic morphological traits were measured. We described and named three of four species that predominate in Maitencillo (including Pyropia orbicularis): Pyropia variabilis Zapata, Meynard, Ramírez, Contreras-Porcia, sp. nov., Porphyra luchea Meynard, Ramírez, Contreras-Porcia sp. nov., and Porphyra longissima Meynard, Ramírez, Contreras-Porcia, sp. nov. With the exception of Po. longissima restricted to boulders surrounded by sandy bottom, and a morphotype of Py. variabilis restricted to rocky walls, the other species/morphotypes have overlapping intertidal distributions. Except for Po. longissima, which is clearly differentiated morphologically (longest and thinnest blades), we conclude that morphology is not sufficient to differentiate bladed Bangiales. Our findings underscore the importance of refining our knowledge of intrinsic and environmental determinants on the distribution of bladed Bangiales.
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Affiliation(s)
- Andrés Meynard
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay, Chile
| | - Javier Zapata
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay, Chile
| | - Nicolás Salas
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay, Chile
| | - Claudia Betancourtt
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay, Chile
| | - Gabriel Pérez-Lara
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay, Chile
| | - Francisco Castañeda
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay, Chile
| | - María Eliana Ramírez
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
- Museo Nacional de Historia Natural, Área Botánica, Casilla 787, Santiago, Chile
| | - Cristian Bulboa Contador
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
| | - Marie-Laure Guillemin
- Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
- CNRS, Sorbonne Universités, UPMC University Paris VI, PUC, UACH, UMI 3614, Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, Place G. Teissier, 29680, Roscoff, France
- Centro FONDAP de Investigación en Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
| | - Loretto Contreras-Porcia
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 440, Santiago, Chile
- Centro de Investigación Marina Quintay (CIMARQ), Facultad de Ciencias de la Vida, Universidad Andres Bello, Quintay, Chile
- Center of Applied Ecology and Sustainability (CAPES), Santiago, Chile
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13
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Genetic heterogeneity of two bioeconomically important kelp species along the Norwegian coast. CONSERV GENET 2019. [DOI: 10.1007/s10592-019-01162-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Santelices B, Gallegos Sánchez C, González AV. Intraorganismal genetic heterogeneity as a source of genetic variation in modular macroalgae. JOURNAL OF PHYCOLOGY 2018; 54:767-771. [PMID: 30206942 DOI: 10.1111/jpy.12784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 09/04/2018] [Indexed: 06/08/2023]
Abstract
Genetic diversity is considered a key factor of population survival and evolution, especially in changing environments. Genetic diversity arises from mutations in the DNA sequence of cell lines and from there it reaches the level of organisms, populations, and regions. However, many previous studies have not considered the organism architecture or pattern of thallus construction, ignoring the potential genetic complexities that intraorganismal genetic heterogeneity could generate in modular organisms. In seaweeds, modularity and clonality exist in many species. Modular organization has been related to advantages in terms of rapid construction and recovery after the loss of individual modules, which have their own demographic properties as they generate, mature, senesce, and die. Based on recent evidence from the literature, we suggest that modules also have their own genetic properties. Specifically, modular seaweeds have two possible sources of genetic diversity at the individual level: the heterozygosity of the genotypes composing the genet, and genetic heterogeneity among the modules within a genet (i.e., intraclonal genetic variability). Both sources of genetic diversity can have ecological and evolutionary consequences, and most of them must be considered in research on modular seaweeds. Linking intraorganismal genetic diversity with clonal architecture and propagation styles may help us to understand important ecological and evolutionary processes such as speciation modes, invasive capacities, or farming potential.
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Affiliation(s)
- Bernabé Santelices
- Departamento de Ecología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Alameda 340, Santiago, 8331150, Chile
| | - Cristóbal Gallegos Sánchez
- Departamento de Ecología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Alameda 340, Santiago, 8331150, Chile
| | - Alejandra V González
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Las Palmeras 3425, Ñuñoa, Santiago, 7800024, Chile
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15
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Mendes CB, Norenburg JL, Solferini VN, Andrade SCS. Hidden diversity: Phylogeography of genus Ototyphlonemertes Diesing, 1863 (Ototyphlonemertidae: Hoplonemertea) reveals cryptic species and high diversity in Chilean populations. PLoS One 2018; 13:e0195833. [PMID: 29698411 PMCID: PMC5919620 DOI: 10.1371/journal.pone.0195833] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 04/01/2018] [Indexed: 11/18/2022] Open
Abstract
Ototyphlonemertes is a cosmopolitan genus of meiofaunal nemerteans. Their morphological characters are insufficient to reliably identify and delimit species. Consequently, some of the species are considered cosmopolitan despite anticipated low dispersion capability of the adults and a short planktonic larval phase. Indeed, recent studies show that some species actually comprise cryptic species, and populations are connected by stochastic events of long-distance dispersion. Based solely on morphological traits, a Lactea and a Pallida morph of Ototyphlonemertes are recognized here from collections at eight and five locations respectively along the Chilean coast. To assess the phylogeographic patterns of their populations, two mitochondrial markers (COI and COX3) of 162 specimens of Lactea and 25 of Pallida were sequenced. Final sequences are 605bp and 362bp for COI and COX3, respectively. Results from phylogenetic and haplotype network analyses suggest that the Lactea morph comprises up to three independent evolutionary units (one with only COX3 sequences). A COI gene tree including other previously published Ototyphlonemertes sequences groups the Chilean Lactea with other Lactea, while the Chilean Pallida is grouped with other Pallida. Different structuring and gene flow patterns found for the four groups support the hypothesis that these are four independent evolutionary entities with different ecological, dispersal and demographical characteristics.
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Affiliation(s)
- Cecili B. Mendes
- Laboratório de Diversidade Genômica, Departamento de Genética e Biologia Evolutiva, IB (USP), São Paulo, SP, Brazil
| | - Jon L. Norenburg
- National Museum of Natural History, Smithsonian Institution, Washington, DC, United States of America
| | - Vera N. Solferini
- Laboratório de Diversidade Genética, Departamento de Genética, Evolução Microbiologia e Imunologia, IB (UNICAMP), Campinas, SP, Brazil
| | - Sónia C. S. Andrade
- Laboratório de Diversidade Genômica, Departamento de Genética e Biologia Evolutiva, IB (USP), São Paulo, SP, Brazil
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16
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Gutiérrez-Ortega JS, Salinas-Rodríguez MM, Martínez JF, Molina-Freaner F, Pérez-Farrera MA, Vovides AP, Matsuki Y, Suyama Y, Ohsawa TA, Watano Y, Kajita T. The phylogeography of the cycad genus Dioon (Zamiaceae) clarifies its Cenozoic expansion and diversification in the Mexican transition zone. ANNALS OF BOTANY 2018; 121:535-548. [PMID: 29293877 PMCID: PMC5838841 DOI: 10.1093/aob/mcx165] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 10/27/2017] [Indexed: 06/07/2023]
Abstract
Background and Aims Biogeographic transition zones are promising areas to study processes of biogeographic evolution and its influence on biological groups. The Mexican transition zone originated due to the overlap of Nearctic and Neotropical biota, which promoted great biological diversification. However, since most previous studies in this area were focused on revealing the phylogeography of Nearctic plants, how historical biogeographic configuration influenced the expansion and diversification of the Neotropical flora remains almost unknown. Using the cycad genus Dioon (Zamiaceae), this study aimed to test whether the biogeographic provinciality of the Mexican transition zone reflects the history of diversification of Neotropical plants. Methods Two chloroplast DNA (cpDNA) regions were analysed from 101 specimens of 15 Dioon species to reveal the distribution of haplogroups. In addition, genome-wide single nucleotide polymorphisms (SNPs) from 84 specimens were used to test the concordance between phylogenetic clusters and the biogeographic provinces. An ultrametric tree was constructed from the sequences containing SNPs to reconstruct the biogeographic events of vicariance and dispersal of Dioon across the Neotropical biogeographic provinces. Key Results Four Dioon lineages with strong phylogeographic structures were recognized using both cpDNA and SNP data. The lineages correspond to two clades that originated from a common ancestor in Eastern Mexico. One clade expanded and diversified in South-east Mexico and Central America. Another clade diversified into three lineages that dispersed to North-east, South and North-west Mexico. Each lineage was biogeographically delimitated. Biogeographic provinces might have provided disparate ecological conditions that facilitated speciation in Dioon since the Miocene. Conclusions The current genetic structure and species diversity of Dioon depict the history of expansion and diversification of the northernmost Neotropical provinces. Past biogeographic connectivities were favoured by elevated topographies, since mountain systems served as corridors for the migration of Dioon and as refugia of tropical communities that diversified during the formation of modern Neotropical forests.
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Affiliation(s)
| | - María Magdalena Salinas-Rodríguez
- Herbario Isidro Palacios, Instituto de Investigaciones de Zonas Desérticas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - José F Martínez
- Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Hermosillo, Mexico
| | - Francisco Molina-Freaner
- Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Hermosillo, Mexico
- Instituto de Geología, Estación Regional del Noroeste, Universidad Nacional Autónoma de México, Hermosillo, Mexico
| | - Miguel Angel Pérez-Farrera
- Laboratorio de Ecología Evolutiva, Herbario Eizi Matuda, Instituto de Ciencias Biológicas, Universidad de Ciencias y Artes de Chiapas, Tuxtla Gutiérrez, Mexico
| | - Andrew P Vovides
- Departamento de Biología Evolutiva, Instituto de Ecología, A.C., Xalapa, Mexico
| | - Yu Matsuki
- Kawatabi Field Science Center, Graduate School of Agricultural Science, Tohoku University, Yomogida, Naruko-onsen, Osaki, Miyagi, Japan
| | - Yoshihisa Suyama
- Kawatabi Field Science Center, Graduate School of Agricultural Science, Tohoku University, Yomogida, Naruko-onsen, Osaki, Miyagi, Japan
| | - Takeshi A Ohsawa
- Department of Biology, Graduate School of Science, Chiba University, Chiba, Japan
| | - Yasuyuki Watano
- Department of Biology, Graduate School of Science, Chiba University, Chiba, Japan
| | - Tadashi Kajita
- Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, Uehara, Yaeyama, Okinawa , Japan
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17
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Camus C, Faugeron S, Buschmann AH. Assessment of genetic and phenotypic diversity of the giant kelp, Macrocystis pyrifera, to support breeding programs. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.01.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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18
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Canales-Aguirre CB, Ferrada-Fuentes S, Galleguillos R, Oyarzun FX, Hernández CE. Population genetic structure of Patagonian toothfish ( Dissostichus eleginoides) in the Southeast Pacific and Southwest Atlantic Ocean. PeerJ 2018; 6:e4173. [PMID: 29362690 PMCID: PMC5774298 DOI: 10.7717/peerj.4173] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 11/29/2017] [Indexed: 11/20/2022] Open
Abstract
Previous studies of population genetic structure in Dissostichus eleginoides have shown that oceanographic and geographic discontinuities drive in this species population differentiation. Studies have focused on the genetics of D. eleginoides in the Southern Ocean; however, there is little knowledge of their genetic variation along the South American continental shelf. In this study, we used a panel of six microsatellites to test whether D. eleginoides shows population genetic structuring in this region. We hypothesized that this species would show zero or very limited genetic structuring due to the habitat continuity along the South American shelf from Peru in the Pacific Ocean to the Falkland Islands in the Atlantic Ocean. We used Bayesian and traditional analyses to evaluate population genetic structure, and we estimated the number of putative migrants and effective population size. Consistent with our predictions, our results showed no significant genetic structuring among populations of the South American continental shelf but supported two significant and well-defined genetic clusters of D. eleginoides between regions (South American continental shelf and South Georgia clusters). Genetic connectivity between these two clusters was 11.3% of putative migrants from the South American cluster to the South Georgia Island and 0.7% in the opposite direction. Effective population size was higher in locations from the South American continental shelf as compared with the South Georgia Island. Overall, our results support that the continuity of the deep-sea habitat along the continental shelf and the biological features of the study species are plausible drivers of intraspecific population genetic structuring across the distribution of D. eleginoides on the South American continental shelf.
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Affiliation(s)
- Cristian B Canales-Aguirre
- Centro i˜mar, Universidad de Los Lagos, Camino Chinquihue Km 6, Puerto Montt, Chile.,Laboratorio de Genética y Acuicultura, Departamento de Oceanografía, Universidad de Concepción, Concepción, Chile.,Laboratorio de Ecología Evolutiva y Filoinformática, Departamento de Zoología, Universidad de Concepción, Concepción, Chile.,Núcleo Milenio INVASAL, Concepción, Chile
| | - Sandra Ferrada-Fuentes
- Laboratorio de Genética y Acuicultura, Departamento de Oceanografía, Universidad de Concepción, Concepción, Chile.,Programa de Doctorado en Sistemática y Biodiversidad, Universidad de Concepción, Concepción, Chile
| | - Ricardo Galleguillos
- Laboratorio de Genética y Acuicultura, Departamento de Oceanografía, Universidad de Concepción, Concepción, Chile
| | - Fernanda X Oyarzun
- Centro i˜mar, Universidad de Los Lagos, Camino Chinquihue Km 6, Puerto Montt, Chile.,Centro de Investigación en Biodiversidad y Ambientes Sustentables (CIBAS), Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile
| | - Cristián E Hernández
- Laboratorio de Ecología Evolutiva y Filoinformática, Departamento de Zoología, Universidad de Concepción, Concepción, Chile
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19
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Gélin P, Fauvelot C, Bigot L, Baly J, Magalon H. From population connectivity to the art of striping Russian dolls: the lessons from Pocillopora corals. Ecol Evol 2018; 8:1411-1426. [PMID: 29375807 PMCID: PMC5773318 DOI: 10.1002/ece3.3747] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 10/25/2017] [Accepted: 10/27/2017] [Indexed: 01/01/2023] Open
Abstract
Here, we examined the genetic variability in the coral genus Pocillopora, in particular within the Primary Species Hypothesis PSH09, identified by Gélin, Postaire, Fauvelot and Magalon (2017) using species delimitation methods [also named Pocillopora eydouxi/meandrina complex sensu, Schmidt-Roach, Miller, Lundgren, & Andreakis (2014)] and which was found to split into three secondary species hypotheses (SSH09a, SSH09b, and SSH09c) according to assignment tests using multi-locus genotypes (13 microsatellites). From a large sampling (2,507 colonies) achieved in three marine provinces [Western Indian Ocean (WIO), Tropical Southwestern Pacific (TSP), and Southeast Polynesia (SEP)], genetic structuring analysis conducted with two clustering analyses (structure and DAPC) using 13 microsatellites revealed that SSH09a was restricted to the WIO while SSH09b and SSH09c were almost exclusively in the TSP and SEP. More surprisingly, each SSH split into two to three genetically differentiated clusters, found in sympatry at the reef scale, leading to a pattern of nested hierarchical levels (PSH > SSH > cluster), each level hiding highly differentiated genetic groups. Thus, rather than structured populations within a single species, these three SSHs, and even the eight clusters, likely represent distinct genetic lineages engaged in a speciation process or real species. The issue is now to understand which hierarchical level (SSH, cluster, or even below) corresponds to the species one. Several hypotheses are discussed on the processes leading to this pattern of mixed clusters in sympatry, evoking formation of reproductive barriers, either by allopatric speciation or habitat selection.
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Affiliation(s)
- Pauline Gélin
- UMR ENTROPIE (Université de La Réunion, IRD, CNRS)Université de La RéunionSt DenisLa Réunion
- Laboratoire d'excellence‐CORAILPerpignanFrance
| | - Cécile Fauvelot
- Laboratoire d'excellence‐CORAILPerpignanFrance
- UMR ENTROPIE (IRD, Université de La Réunion, CNRS)Centre IRD de NouméaNoumeaNew Caledonia
- Present address:
Université Côte d'AzurCNRSNiceFrance
| | - Lionel Bigot
- UMR ENTROPIE (Université de La Réunion, IRD, CNRS)Université de La RéunionSt DenisLa Réunion
- Laboratoire d'excellence‐CORAILPerpignanFrance
| | - Joseph Baly
- Laboratoire d'excellence‐CORAILPerpignanFrance
- UMR ENTROPIE (IRD, Université de La Réunion, CNRS)Centre IRD de NouméaNoumeaNew Caledonia
| | - Hélène Magalon
- UMR ENTROPIE (Université de La Réunion, IRD, CNRS)Université de La RéunionSt DenisLa Réunion
- Laboratoire d'excellence‐CORAILPerpignanFrance
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Barria AM, Bacigalupe LD, Lagos NA, Lardies MA. Thermal physiological traits and plasticity of metabolism are sensitive to biogeographic breaks in a rock-pool marine shrimp. J Exp Biol 2018; 221:jeb.181008. [DOI: 10.1242/jeb.181008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 07/31/2018] [Indexed: 12/24/2022]
Abstract
Populations of broadly distributed species commonly exhibit latitudinal variation in thermal tolerance and physiological plasticity. This variation can be interrupted when biogeographic breaks occur across the range of a species, which are known to affect patterns of community structure, abundance, and recruitment dynamics. Coastal biogeographic breaks often impose abrupt changes in environmental characteristics driven by oceanographic processes and can affect the physiological responses of populations inhabiting these areas. Here we examined thermal limits, performances for heart rate and plasticity for metabolic rate of the intertidal shrimp Betaeus emarginatus from seven populations along its latitudinal range (∼ 3000 km). The distribution of this species encompass two breaks at the southeastern Pacific coast of Chile: the northern break is characterized by sharp discontinuities in upwelling regimes, and the southern break, constitutes a major discontinuity in water conditions (temperature, pH, dissolved oxygen and nutrients), coastline topography, and divergence of main oceanographic currents. For B. emarginatus, we found higher plasticity of metabolism in the sites sampled at the biogeographic breaks, and at the site subjected to seasonal upwelling. The variation of metabolic rate was not consistent with increasing latitude and it was not affected by breaks. The lower and upper thermal limits were lower in populations around breaks, although the optimum temperature decreased towards higher latitudes. Overall, while thermal limits and plasticity of metabolism are related to biogeographic breaks, metabolic rate is not related with increasing latitude or the presence of breaks in the sampled range.
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Affiliation(s)
- Aura M. Barria
- Departamento de Ciencias, Facultad de Artes Liberales, Universidad Adolfo Ibañez, Diagonal Las Torres 2640, Peñalolen, Santiago, Chile
| | - Leonardo D. Bacigalupe
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
| | - Nelson A. Lagos
- Centro de Investigación e Innovación para el Cambio Climático, Facultad de Ciencias, Universidad Santo Tomás, Ejército 146, Santiago, Chile
| | - Marco A. Lardies
- Departamento de Ciencias, Facultad de Artes Liberales, Universidad Adolfo Ibañez, Diagonal Las Torres 2640, Peñalolen, Santiago, Chile
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López BA, Macaya EC, Tala F, Tellier F, Thiel M. The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific. JOURNAL OF PHYCOLOGY 2017; 53:70-84. [PMID: 27734500 DOI: 10.1111/jpy.12479] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 09/05/2016] [Indexed: 06/06/2023]
Abstract
Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could be due to limitations in local supply and dispersal of floating kelps. To test this hypothesis, the spatiotemporal dynamics of kelp strandings were examined in four biogeographic districts along the Chilean coast (28°-42°S). We determined the biomass and demography of stranded individuals on 33 beaches for three subsequent years (2013, 2014, 2015) to examine whether rafting is restricted to certain districts and seasons (winter or summer). Stranded kelps were found on all beaches. Most kelps had only one stipe (one individual), although we also frequently found coalesced holdfasts with mature males and females, which would facilitate successful rafting dispersal, gamete release, and reproduction upon arrival. High biomasses of stranded kelps occurred in the northern-central (30°S-33°S) and southernmost districts (37°S-42°S), and lower biomasses in the northernmost (28°S-30°S) and southern-central districts (33°S-37°S). The highest percentages and sizes of epibionts (Lepas spp.), indicative of prolonged floating periods, were found on stranded kelps in the northernmost and southernmost districts. Based on these results, we conclude that rafting dispersal can vary regionally, being more common in the northernmost and southernmost districts, depending on intrinsic (seaweed biology) and extrinsic factors (shore morphology and oceanography) that affect local supply of kelps and regional hydrodynamics.
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Affiliation(s)
- Boris A López
- Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
- Departamento de Acuicultura y Recursos Agroalimentarios, Universidad de Los Lagos, Avenida Fuchslocher 1305, Osorno, Chile
| | - Erasmo C Macaya
- Laboratorio de Estudios Algales (ALGALAB), Departamento de Oceanografía, Universidad de Concepción, Casilla 160-C, Concepción, Chile
- Millennium Nucleus Ecology and Sustainable Management of Oceanic Island (ESMOI), Coquimbo, Chile
- Centro FONDAP de Investigaciones en Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
| | - Fadia Tala
- Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
- Centro de Investigación y Desarrollo Tecnológico en Algas (CIDTA), Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
| | - Florence Tellier
- Departamento de Ecología, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Casilla 297, Concepción, Chile
- Centro de Investigación en Biodiversidad y Ambientes Sustentables (CIBAS), Universidad Católica de la Santísima Concepción, Casilla 297, Concepción, Chile
| | - Martin Thiel
- Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
- Millennium Nucleus Ecology and Sustainable Management of Oceanic Island (ESMOI), Coquimbo, Chile
- Centro de Estudios Avanzados en Zonas Áridas, CEAZA, Coquimbo, Chile
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Cruces E, Rautenberger R, Rojas-Lillo Y, Cubillos VM, Arancibia-Miranda N, Ramírez-Kushel E, Gómez I. Physiological acclimation of Lessonia spicata to diurnal changing PAR and UV radiation: differential regulation among down-regulation of photochemistry, ROS scavenging activity and phlorotannins as major photoprotective mechanisms. PHOTOSYNTHESIS RESEARCH 2017; 131:145-157. [PMID: 27620461 DOI: 10.1007/s11120-016-0304-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 09/02/2016] [Indexed: 05/05/2023]
Abstract
Intertidal macroalgae are constantly subjected to high variations in the quality and quantity of incident irradiance that can eventually generate detrimental effect on the photosynthetic apparatus. The success of these organisms to colonize the stressful coastal habitat is mainly associated with the complexity of their morphological structures and the efficiency of the anti-stress mechanisms to minimize the physiological stress. Lessonia spicata (Phaeophyceae), a brown macroalga, that inhabits the intertidal zone in central-southern Chile was studied in regard to their physiological (quantum yield, electron transport rate, pigments) and biochemical (phlorotannins content, antioxidant metabolism, oxidative stress) responses during a daily light cycle under natural solar radiation. Major findings were that F v/F m, photosynthetic parameters (ETRmax, alpha, E k) and pigments in L. spicata showed an inverse relationship to the diurnal changes in solar radiation. Phlorotannins levels and antioxidant activity showed their highest values in treatment that included UV radiation. There was an increase in SOD and APX in relation at light stress, with a peak in activity between 5.2 and 10.1 W m-2 of biologically effective dose. The increase in peroxidative damage was proportional to light dose. These results indicated that different light doses can trigger a series of complementary mechanisms of acclimation in L. spicata based on: (i) down-regulation of photochemistry activity and decrease in concentration of photosynthetic pigments; (ii) induction of phenolic compounds with specific UV-screening functions; and (iii) reactive oxygen species (ROS) scavenging activity via complementary repair of the oxidative damage through increased activity of antioxidant enzymes and potentially increased amounts of phenolic compounds.
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Affiliation(s)
- Edgardo Cruces
- Center for Development of Nanoscience and Nanotechnology (CEDENNA), Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins, 3363, Santiago, Chile.
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile.
| | - Ralf Rautenberger
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
- Laboratorio de Ecosistemas de Macroalgas Antárticas y Subantárticas (LEMAS), Universidad de Magallanes, Casilla 113-D, Punta Arenas, Chile
| | - Yesenia Rojas-Lillo
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Victor Mauricio Cubillos
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
- Laboratorio Costero de Recursos Acuáticos de Calfuco, Universidad Austral de Chile, Valdivia, Chile
| | - Nicolás Arancibia-Miranda
- Center for Development of Nanoscience and Nanotechnology (CEDENNA), Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins, 3363, Santiago, Chile
| | - Eduardo Ramírez-Kushel
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Iván Gómez
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
- Centro FONDAP de Investigación de Ecosistemas Marinos de Altas Latitudes (IDEAL), Santiago, Chile
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Guillemin ML, Valero M, Morales Collio K, Pinochet Sanchez R, Henríquez Espinosa M, Silva AX. Microsatellite markers and cytoplasmic sequences reveal contrasting pattern of spatial genetic structure in the red algae species complex Mazzaella laminarioides. JOURNAL OF PHYCOLOGY 2016; 52:806-816. [PMID: 27317474 DOI: 10.1111/jpy.12440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 05/04/2016] [Indexed: 06/06/2023]
Abstract
Mazzaella laminarioides is a common haploid-diploid red alga that forms dense beds. This alga has a wide distributional range, covering 3,500 km of the Chilean coast, but is restricted to high rocky intertidal zones. Recently, the existence of three highly divergent genetic lineages was demonstrated for this taxon, and two cytoplasmic markers were used to determine that these lineages are distributed in strict parapatry. Here, using 454 next-generation sequencing, we developed polymorphic microsatellite loci that cross amplify in all three cytoplasmic lineages. Six sites (i.e., two sites within each lineage) were analyzed using nine microsatellite loci. Our work shows that, although substantial cytoplasmic differentiation occurs within M. laminarioides, the microsatellite loci did not retrieve three nuclear genetic clusters as expected. Indeed, while the northernmost and southernmost cytoplasmic lineages form two strongly divergent nuclear groups characterized by diagnostic alleles, the third cytoplasmic lineage did not form a third nuclear independent group. It is possible that inter-lineage gene exchange has occurred, particularly at sites along the contact zone between the different cytoplasmic lineages. This nuclear-cytoplasmic incongruence in M. laminarioides could be explained by incomplete lineage sorting of the nuclear genes or asymmetric introgressive hybridization between the lineages. Finally, highly significant heterozygote deficiencies (suggesting occurrence of intergametophytic selfing) were observed in the three small northernmost sites while the large southernmost sites generally approached panmixia.
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Affiliation(s)
- Marie-Laure Guillemin
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
- CNRS, Sorbonne Universités, UPMC University Paris VI, UMI 3614, Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, Place G. Tessier, 296888, Roscoff, France
| | - Myriam Valero
- CNRS, Sorbonne Universités, UPMC University Paris VI, UMI 3614, Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, Place G. Tessier, 296888, Roscoff, France
| | - Kennia Morales Collio
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
| | - Ramona Pinochet Sanchez
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
| | - Miguel Henríquez Espinosa
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
| | - Andrea X Silva
- AUSTRAL-omics, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
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Higher reproductive success for chimeras than solitary individuals in the kelp Lessonia spicata but no benefit for individual genotypes. Evol Ecol 2016. [DOI: 10.1007/s10682-016-9849-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cheng R, Xue D, Galsworthy A, Han H. Complete mitochondrial genomes throw light on budding speciation in threeBistonspecies (Lepidoptera, Geometridae). ZOOL SCR 2016. [DOI: 10.1111/zsc.12184] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Rui Cheng
- Key Laboratory of Zoological Systematics and Evolution; Institute of Zoology; Chinese Academy of Sciences; No. 1 Beichen West Road Chaoyang District Beijing 100101 China
- University of Chinese Academy of Sciences; 19 Yuquan Road Shijingshan District Beijing 100049 China
| | - Dayong Xue
- Key Laboratory of Zoological Systematics and Evolution; Institute of Zoology; Chinese Academy of Sciences; No. 1 Beichen West Road Chaoyang District Beijing 100101 China
| | | | - Hongxiang Han
- Key Laboratory of Zoological Systematics and Evolution; Institute of Zoology; Chinese Academy of Sciences; No. 1 Beichen West Road Chaoyang District Beijing 100101 China
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26
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Friedlander AM, Ballesteros E, Caselle JE, Gaymer CF, Palma AT, Petit I, Varas E, Muñoz Wilson A, Sala E. Marine Biodiversity in Juan Fernández and Desventuradas Islands, Chile: Global Endemism Hotspots. PLoS One 2016; 11:e0145059. [PMID: 26734732 PMCID: PMC4703205 DOI: 10.1371/journal.pone.0145059] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Accepted: 11/29/2015] [Indexed: 11/19/2022] Open
Abstract
The Juan Fernández and Desventuradas islands are among the few oceanic islands belonging to Chile. They possess a unique mix of tropical, subtropical, and temperate marine species, and although close to continental South America, elements of the biota have greater affinities with the central and south Pacific owing to the Humboldt Current, which creates a strong biogeographic barrier between these islands and the continent. The Juan Fernández Archipelago has ~700 people, with the major industry being the fishery for the endemic lobster, Jasus frontalis. The Desventuradas Islands are uninhabited except for a small Chilean military garrison on San Félix Island. We compared the marine biodiversity of these islands across multiple taxonomic groups. At San Ambrosio Island (SA), in Desventuradas, the laminarian kelp (Eisenia cokeri), which is limited to Desventuradas in Chile, accounted for >50% of the benthic cover at wave exposed areas, while more sheltered sites were dominated by sea urchin barrens. The benthos at Robinson Crusoe Island (RC), in the Juan Fernández Archipelago, comprised a diverse mix of macroalgae and invertebrates, a number of which are endemic to the region. The biomass of commercially targeted fishes was >2 times higher in remote sites around RC compared to sheltered locations closest to port, and overall biomass was 35% higher around SA compared to RC, likely reflecting fishing effects around RC. The number of endemic fish species was extremely high at both islands, with 87.5% of the species surveyed at RC and 72% at SA consisting of regional endemics. Remarkably, endemics accounted for 99% of the numerical abundance of fishes surveyed at RC and 96% at SA, which is the highest assemblage-level endemism known for any individual marine ecosystem on earth. Our results highlight the uniqueness and global significance of these biodiversity hotspots exposed to very different fishing pressures.
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Affiliation(s)
- Alan M. Friedlander
- Pristine Seas, National Geographic Society, Washington, District of Columbia, United States of America
- Fisheries Ecology Research Lab, University of Hawaii, Honolulu, Hawaii, United States of America
- Millennium Nucleus for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Coquimbo, Chile
- * E-mail:
| | | | - Jennifer E. Caselle
- Marine Science Institute, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Carlos F. Gaymer
- Millennium Nucleus for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Coquimbo, Chile
- Universidad Católica del Norte, Coquimbo, Chile
- Centro de Estudios Avanzados en Zonas Áridas, Coquimbo, Chile
- Instituto de Ecología y Biodiversidad, Coquimbo, Chile
| | | | | | | | | | - Enric Sala
- Pristine Seas, National Geographic Society, Washington, District of Columbia, United States of America
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Geoffroy A, Mauger S, De Jode A, Le Gall L, Destombe C. Molecular evidence for the coexistence of two sibling species in Pylaiella littoralis (Ectocarpales, Phaeophyceae) along the Brittany coast. JOURNAL OF PHYCOLOGY 2015; 51:480-489. [PMID: 26986664 DOI: 10.1111/jpy.12291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 01/19/2015] [Indexed: 06/05/2023]
Abstract
The great phenotypic variability and the lack of diagnostic characters in the genus Pylaiella render the systematic study of this genus problematic. In this study, we investigated the diversity of Pylaiella littoralis along the Brittany (France) coast using a DNA barcoding multilocus approach with mitochondrial (cox1, nad1, and atp9) and chloroplastic (rbcL and atpB) markers associated with a population genetics approach using 10 microsatellite markers. In addition, spatio-temporal sampling was conducted along the Brittany coast. We sampled 140 individuals from four sites located between Saint-Malo and Concarneau (380 km) from April to October. Mitochondrial sequence data revealed the occurrence of two sibling species, with a minimum of 2.4% divergence between them. Microsatellite genotypic data congruently revealed two well-supported clusters matching the two mitochondrial clades of Pylaiella. Although gene flow is limited between species, occurrence of genetic admixtures in some populations suggested that reproductive isolation is not complete. Our study highlighted the complementarity of barcoding and population genetics approaches to shed light on the evolutionary processes that lead to speciation.
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Affiliation(s)
- Alexandre Geoffroy
- Sorbonne Universités, UPMC Université Paris 06, UMI 3614 Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, Roscoff, 29688, France
- CNRS, UMI 3614 Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, Roscoff, 29688, France
| | - Stéphane Mauger
- Sorbonne Universités, UPMC Université Paris 06, UMI 3614 Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, Roscoff, 29688, France
- CNRS, UMI 3614 Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, Roscoff, 29688, France
| | - Aurélien De Jode
- Sorbonne Universités, UPMC Université Paris 06, UMI 3614 Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, Roscoff, 29688, France
- CNRS, UMI 3614 Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, Roscoff, 29688, France
| | - Line Le Gall
- Muséum National d'Histoire Naturelle, Institut de Systématique, Evolution, Biodiversité, UMR 7205 CNRS-EPHE-MNHN-UPMC, Equipe Exploration, Espèces, Evolution, case postale No 39, 57 rue Cuvier, 75231, Cedex 05 Paris, France
| | - Christophe Destombe
- Sorbonne Universités, UPMC Université Paris 06, UMI 3614 Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, CS 90074, Roscoff, 29688, France
- CNRS, UMI 3614 Evolutionary Biology and Ecology of Algae, Station Biologique de Roscoff, Roscoff, 29688, France
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Robuchon M, Valero M, Gey D, Le Gall L. How does molecular-assisted identification affect our estimation of α, β and γ biodiversity? An example from understory red seaweeds (Rhodophyta) of Laminaria kelp forests in Brittany, France. Genetica 2015; 143:207-23. [PMID: 25351554 DOI: 10.1007/s10709-014-9796-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 10/15/2014] [Indexed: 12/18/2022]
Abstract
Using two distinct identification methods, one based on morphological characters only and the other combining morphological and molecular characters (integrative identification method), we investigated the differences in the biodiversity patterns of red seaweed communities associated with kelp forests at various spatial scales: the regional diversity of Brittany, France (γ-diversity), the local diversity at different Breton sites (α-diversity) and the differentiation in species diversity and abundances among those sites (β-diversity). To characterise α and β diversities, we conducted an initial survey in winter 2011 at 20 sites belonging to four different sub-regions, with specimens collected from six quadrats of 0.10 m(2) at each site, three in the tidal zone dominated by Laminaria digitata and three in the zone dominated by Laminaria hyperborea. To further characterise the regional diversity, we carried out another survey combining several sampling methods (quadrats and visual census) in different seasons (winter, spring and summer) and different years (2011 and 2012). In all, we collected 1990 specimens that were assigned to 76 taxa with the identification method based on morphological characters and 139 taxa using the integrative method. For γ and α diversity, the use of molecular characters revealed several cases of cryptic diversity and both increased the number of identified taxa and improved their taxonomic resolution. However, the addition of molecular characters for specimen identification only slightly affected estimates of β-diversity.
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Affiliation(s)
- Marine Robuchon
- Institut de Systématique, Evolution, Biodiversité, UMR 7205 CNRS, EPHE, MNHN, UPMC, Equipe Exploration, Espèces, Evolution, Muséum National d'Histoire Naturelle, Case Postale N° 39, 57 rue Cuvier, 75231, Cedex 05 Paris, France,
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29
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Vieira VMNCS, Oppliger LV, Engelen AH, Correa JA. A new method to quantify and compare the multiple components of fitness--a study case with kelp niche partition by divergent microstage adaptations to temperature. PLoS One 2015; 10:e0119670. [PMID: 25821954 PMCID: PMC4379098 DOI: 10.1371/journal.pone.0119670] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 01/15/2015] [Indexed: 11/19/2022] Open
Abstract
POINT 1 Management of crops, commercialized or protected species, plagues or life-cycle evolution are subjects requiring comparisons among different demographic strategies. The simpler methods fail in relating changes in vital rates with changes in population viability whereas more complex methods lack accuracy by neglecting interactions among vital rates. POINT 2 The difference between the fitness (evaluated by the population growth rate λ) of two alternative demographies is decomposed into the contributions of the differences between the pair-wised vital rates and their interactions. This is achieved through a full Taylor expansion (i.e. remainder = 0) of the demographic model. The significance of each term is determined by permutation tests under the null hypothesis that all demographies come from the same pool. POINT 3 An example is given with periodic demographic matrices of the microscopic haploid phase of two kelp cryptic species observed to partition their niche occupation along the Chilean coast. The method provided clear and synthetic results showing conditional differentiation of reproduction is an important driver for their differences in fitness along the latitudinal temperature gradient. But it also demonstrated that interactions among vital rates cannot be neglected as they compose a significant part of the differences between demographies. POINT 4 This method allows researchers to access the effects of multiple effective changes in a life-cycle from only two experiments. Evolutionists can determine with confidence the effective causes for changes in fitness whereas population managers can determine best strategies from simpler experimental designs.
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Affiliation(s)
- Vasco M. N. C. S. Vieira
- MARETEC, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Luz Valeria Oppliger
- Center of Applied Ecology and Sustainability, Facultad de Ciencias Biologicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Aschwin H. Engelen
- CCMAR—Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal
| | - Juan A. Correa
- Center of Applied Ecology and Sustainability, Facultad de Ciencias Biologicas, Pontificia Universidad Católica de Chile, Santiago, Chile
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López Z, Cárdenas L, Runil F, González MT. Contrasting definitive hosts as determinants of the genetic structure in a parasite with complex life cycle along the south-eastern Pacific. Mol Ecol 2015; 24:1060-73. [PMID: 25602037 DOI: 10.1111/mec.13080] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 01/08/2015] [Accepted: 01/14/2015] [Indexed: 11/28/2022]
Abstract
The spatial genetic structure (and gene flow) of parasites with complex life cycles, such as digeneans, has been attributed mainly to the dispersion ability of the most mobile host, which most often corresponds to the definitive host (DH). In this study, we compared the genetic structure and diversity of adult Neolebouria georgenascimentoi in two fish species (DHs) that are extensively distributed along the south-eastern Pacific (SEP). The analysis was based on the cytochrome oxidase subunit I gene sequences of parasites collected between 23°S and 45°S. In total, 202 sequences of N. georgenascimentoi in Pinguipes chilensis isolated from nine sites and 136 sequences of Prolatilus jugularis from five sites were analysed. Our results showed that N. georgenascimentoi is a species complex that includes three different parasite species; however, in this study, only lineage 1 and 2 found in P. chilensis and P. jugularis, respectively, were studied because they are widely distributed along the coastline. Lineage 1 parasites had two common haplotypes with wide distribution and unique haplotypes in northern sites. Lineage 2 had only one common haplotype with wide distribution and a large number of unique haplotypes with greater genetic diversity. Both lineages have experienced recent population expansion. Only lineage 1 exhibited a genetic structure that was mainly associated with a biogeographical break at approximately 30°S along the SEP. Our finding suggests that host access to different prey (=intermediate hosts) could affect the genetic structure of the parasite complex discovered here. Consequently, difference between these patterns suggests that factors other than DH dispersal are involved in the genetic structure of autogenic parasites.
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Affiliation(s)
- Z López
- Instituto de Ciencias Naturales "Alexander Von Humboldt", Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Av. Angamos 601, P.O. Box 170, Antofagasta, Chile; Programa Magíster en Ecología de Sistemas Acuáticos, Universidad de Antofagasta, Antofagasta, Chile
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Pante E, Puillandre N, Viricel A, Arnaud-Haond S, Aurelle D, Castelin M, Chenuil A, Destombe C, Forcioli D, Valero M, Viard F, Samadi S. Species are hypotheses: avoid connectivity assessments based on pillars of sand. Mol Ecol 2015; 24:525-44. [DOI: 10.1111/mec.13048] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/06/2014] [Accepted: 12/13/2014] [Indexed: 01/31/2023]
Affiliation(s)
- Eric Pante
- Littoral, Environnement et Sociétés (LIENSs); UMR 7266 CNRS - Université de La Rochelle; 2 rue Olympe de Gouges 17042 La Rochelle France
| | - Nicolas Puillandre
- ISYEB - UMR 7205 - CNRS, MNHN; UPMC (University Paris 06); EPHE - Muséum national d'Histoire naturelle; Sorbonne Universités; CP26, 57 rue Cuvier F-75231 Paris Cedex 05 France
| | - Amélia Viricel
- Littoral, Environnement et Sociétés (LIENSs); UMR 7266 CNRS - Université de La Rochelle; 2 rue Olympe de Gouges 17042 La Rochelle France
| | | | - Didier Aurelle
- Aix Marseille Université; CNRS, IRD; Avignon Université, IMBE UMR 7263; 13397 Marseille France
| | - Magalie Castelin
- Aquatic Animal Health Section; Fisheries and Oceans Canada; Pacific Biological Station; 3190 Hammond Bay Road Nanaimo BC Canada V9T 6N7
| | - Anne Chenuil
- Aix Marseille Université; CNRS, IRD; Avignon Université, IMBE UMR 7263; 13397 Marseille France
| | - Christophe Destombe
- Sorbonne Universités; UPMC; University Paris 06; Station Biologique de Roscoff F-29680 Roscoff France
- CNRS, Laboratory Evolutionary Biology and Ecology of Algae; Sorbonne Universités; Université Pierre et Marie Curie (UPMC) Univ Paris 06, UMI 3614, UPMC, PUCCh, UACh; Station Biologique de Roscoff F-29680 Roscoff France
| | - Didier Forcioli
- Faculté des Sciences; Université Nice-Sophia-Antipolis, Equipe Symbiose Marine UMR 7138; Parc Valrose 06108 Nice Cedex 2 France
- UMR 7138 Evolution Paris Seine; Université Pierre et Marie Curie - CNRS; 7 Quai St Bernard 75252 Paris Cedex 05 France
| | - Myriam Valero
- Sorbonne Universités; UPMC; University Paris 06; Station Biologique de Roscoff F-29680 Roscoff France
- CNRS, Laboratory Evolutionary Biology and Ecology of Algae; Sorbonne Universités; Université Pierre et Marie Curie (UPMC) Univ Paris 06, UMI 3614, UPMC, PUCCh, UACh; Station Biologique de Roscoff F-29680 Roscoff France
| | - Frédérique Viard
- Sorbonne Universités; UPMC; University Paris 06; Station Biologique de Roscoff F-29680 Roscoff France
- Centre National de la Recherche Scientifique (CNRS); Laboratory Adaptation and Diversity in the Marine Environment; Team Diversity and Connectivity in Coastal Marine Landscapes, UMR 7144; Station Biologique de Roscoff F-29680 Roscoff France
| | - Sarah Samadi
- ISYEB - UMR 7205 - CNRS, MNHN; UPMC (University Paris 06); EPHE - Muséum national d'Histoire naturelle; Sorbonne Universités; CP26, 57 rue Cuvier F-75231 Paris Cedex 05 France
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Tapia FJ, Largier JL, Castillo M, Wieters EA, Navarrete SA. Latitudinal discontinuity in thermal conditions along the nearshore of central-northern Chile. PLoS One 2014; 9:e110841. [PMID: 25334020 PMCID: PMC4204934 DOI: 10.1371/journal.pone.0110841] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 09/17/2014] [Indexed: 11/18/2022] Open
Abstract
Over the past decade, evidence of abrupt latitudinal changes in the dynamics, structure and genetic variability of intertidal and subtidal benthic communities along central-northern Chile has been found consistently at 30–32°S. Changes in the advective and thermal environment in nearshore waters have been inferred from ecological patterns, since analyses of in situ physical data have thus far been missing. Here we analyze a unique set of shoreline temperature data, gathered over 4–10 years at 15 sites between 28–35°S, and combine it with satellite-derived winds and sea surface temperatures to investigate the latitudinal transition in nearshore oceanographic conditions suggested by recent ecological studies. Our results show a marked transition in thermal conditions at 30–31°S, superimposed on a broad latitudinal trend, and small-scale structures associated with cape-and-bay topography. The seasonal cycle dominated temperature variability throughout the region, but its relative importance decreased abruptly south of 30–31°S, as variability at synoptic and intra-seasonal scales became more important. The response of shoreline temperatures to meridional wind stress also changed abruptly at the transition, leading to a sharp drop in the occurrence of low-temperature waters at northern sites, and a concurrent decrease in corticated algal biomass. Together, these results suggest a limitation of nitrate availability in nearshore waters north of the transition. The localized alongshore change results from the interaction of latitudinal trends (e.g., wind stress, surface warming, inertial period) with a major headland-bay system (Punta Lengua de Vaca at 30.25°S), which juxtaposes a southern stretch of coast characterized by upwelling with a northern stretch of coast characterized by warm surface waters and stratification. This transition likely generates a number of latitude-dependent controls on ecological processes in the nearshore that can explain species-specific effects, and add strength to the suggestion of an oceanography-driven, major spatial transition in coastal communities at 30–31°S.
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Affiliation(s)
- Fabian J. Tapia
- Estación Costera de Investigaciones Marinas - Las Cruces, Pontificia Universidad Católica de Chile, Santiago, Chile
- Departamento de Oceanografía & COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile
- * E-mail:
| | - John L. Largier
- Bodega Marine Laboratory, University of California Davis, Davis, California, United States of America
| | - Manuel Castillo
- Estación Costera de Investigaciones Marinas - Las Cruces, Pontificia Universidad Católica de Chile, Santiago, Chile
- Departamento de Oceanografía & COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile
| | - Evie A. Wieters
- Estación Costera de Investigaciones Marinas - Las Cruces, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for Marine Conservation - Las Cruces, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Sergio A. Navarrete
- Estación Costera de Investigaciones Marinas - Las Cruces, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for Marine Conservation - Las Cruces, Pontificia Universidad Católica de Chile, Santiago, Chile
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Dijoux L, Viard F, Payri C. The more we search, the more we find: discovery of a new lineage and a new species complex in the genus Asparagopsis. PLoS One 2014; 9:e103826. [PMID: 25076489 PMCID: PMC4116237 DOI: 10.1371/journal.pone.0103826] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 07/07/2014] [Indexed: 11/26/2022] Open
Abstract
In the past few decades, in the marine realm in particular, the use of molecular tools has led to the discovery of hidden taxonomic diversity, revealing complexes of sister species. A good example is the red algal genus Asparagopsis. The two species (A. armata and A. taxiformis) recognized in this genus have been introduced in many places around the world. Within the nominal species A. taxiformis, previous molecular analyses have uncovered several lineages, suggesting the existence of sister species or subspecies. Although the genus has been well studied in some regions (e.g., the Mediterranean Sea and Hawaii), it remains poorly investigated in others (e.g., South Pacific). Our study mainly focused on these latter areas to clarify lineages and better determine lineage status (i.e., native vs. introduced). A total of 188 specimens were collected from 61 sites, 58 of which had never been sampled before. We sequenced the DNA from samples for three markers and obtained 112 sequences for the chloroplastic RuBisCo spacer, 118 sequences for the nuclear LSU rRNA gene, and 174 for the mitochondrial spacer cox2-3. Phylogenetic analyses using all three markers suggested the existence of two cryptic sister species with the discovery of a new clade within A. armata. This clade was found only in Western Australia, Tasmania and New Zealand, and is thus restricted to a subregional biogeographic unit. We also discovered a new, fifth lineage for A. taxiformis restricted to the South Pacific and Western Australia. Except for this newly described lineage, all other lineages showed a global distribution influenced by introduction events. These results illustrate the difficulty in accurately defining cosmopolitan species. Our findings also highlight the need for targeted (i.e., in poorly studied areas) and geographically extensive sampling efforts when studying taxa that have been introduced globally and that are likely to hide species complexes.
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Affiliation(s)
- Laury Dijoux
- Institut de Recherche pour le Développement (IRD), UR227 CoRéUs-LabEx-CORAIL, Noumea, New Caledonia
- Sorbonne Universités, Université Pierre et Marie Curie (UPMC) Univ Paris 06, UMR 7144, Station Biologique de Roscoff, Roscoff, France
- Centre National de la Recherche Scientifique (CNRS), UMR 7144, Divco team, Station Biologique de Roscoff, Roscoff, France
| | - Frédérique Viard
- Sorbonne Universités, Université Pierre et Marie Curie (UPMC) Univ Paris 06, UMR 7144, Station Biologique de Roscoff, Roscoff, France
- Centre National de la Recherche Scientifique (CNRS), UMR 7144, Divco team, Station Biologique de Roscoff, Roscoff, France
| | - Claude Payri
- Institut de Recherche pour le Développement (IRD), UR227 CoRéUs-LabEx-CORAIL, Noumea, New Caledonia
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Haye PA, Segovia NI, Muñoz-Herrera NC, Gálvez FE, Martínez A, Meynard A, Pardo-Gandarillas MC, Poulin E, Faugeron S. Phylogeographic structure in benthic marine invertebrates of the southeast Pacific coast of Chile with differing dispersal potential. PLoS One 2014; 9:e88613. [PMID: 24586356 PMCID: PMC3929388 DOI: 10.1371/journal.pone.0088613] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 01/15/2014] [Indexed: 11/18/2022] Open
Abstract
The role of dispersal potential on phylogeographic structure, evidenced by the degree of genetic structure and the presence of coincident genetic and biogeographic breaks, was evaluated in a macrogeographic comparative approach along the north-central coast of Chile, across the biogeographic transition zone at 30°S. Using 2,217 partial sequences of the mitochondrial Cytochrome Oxidase I gene of eight benthic invertebrate species along ca. 2,600 km of coast, we contrasted dispersal potential with genetic structure and determined the concordance between genetic divergence between biogeographic regions and the biogeographic transition zone at 30°S. Genetic diversity and differentiation highly differed between species with high and low dispersal potential. Dispersal potential, sometimes together with biogeographic region, was the factor that best explained the genetic structure of the eight species. The three low dispersal species, and one species assigned to the high dispersal category, had a phylogeographic discontinuity coincident with the biogeographic transition zone at 30°S. Furthermore, coalescent analyses based on the isolation-with-migration model validate that the split between biogeographic regions north and south of 30°S has a historic origin. The signatures of the historic break in high dispersers is parsimoniously explained by the homogenizing effects of gene flow that have erased the genetic signatures, if ever existed, in high dispersers. Of the four species with structure across the break, only two had significant albeit very low levels of asymmetric migration across the transition zone. Historic processes have led to the current biogeographic and phylogeographic structure of marine species with limited dispersal along the north-central coast of Chile, with a strong lasting impact in their genetic structure.
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Affiliation(s)
- Pilar A. Haye
- Laboratorio de Diversidad Molecular, Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte & Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, Concepción, Chile
| | - Nicolás I. Segovia
- Laboratorio de Diversidad Molecular, Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte & Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile
- Instituto de Ecología y Biodiversidad, Departamento de Ciencias Ecológicas, Universidad de Chile, Santiago, Chile
| | - Natalia C. Muñoz-Herrera
- Laboratorio de Diversidad Molecular, Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte & Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile
- Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, Concepción, Chile
| | - Francisca E. Gálvez
- Laboratorio de Diversidad Molecular, Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte & Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile
| | - Andrea Martínez
- Instituto de Ecología y Biodiversidad, Departamento de Ciencias Ecológicas, Universidad de Chile, Santiago, Chile
| | - Andrés Meynard
- Centro de Conservación Marina, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - María C. Pardo-Gandarillas
- Instituto de Ecología y Biodiversidad, Departamento de Ciencias Ecológicas, Universidad de Chile, Santiago, Chile
- Centro de Conservación Marina, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Elie Poulin
- Instituto de Ecología y Biodiversidad, Departamento de Ciencias Ecológicas, Universidad de Chile, Santiago, Chile
| | - Sylvain Faugeron
- Centro de Conservación Marina, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
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Homogeneous nuclear background for mitochondrial cline in northern range of Notochthamalus scabrosus. G3-GENES GENOMES GENETICS 2014; 4:225-30. [PMID: 24347623 PMCID: PMC3931557 DOI: 10.1534/g3.113.008383] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A mitochondrial cline along the Chilean coast in the barnacle Notochthamalus scabrosus suggests a species history of transient allopatry and secondary contact. However, previous studies of nuclear sequence divergence suggested population genetic homogeneity across northern and central Chile. Here, we collect single-nucleotide polymorphism data from pooled population samples sequenced with restriction site−associated DNA sequencing procedures, confirm these data with the use of a GoldenGate array, and identify a discordance between population genetic patterns in the nuclear and mitochondrial genomes. This discordance was noted in previous work on this species, but here it is confirmed that the nuclear genome exhibits only slight phylogeographic variation across 3000 km of coastline, in the presence of a strong and statistically significant mitochondrial cline. There are nevertheless markers (approximately 5% of nuclear single-nucleotide polymorphisms) exhibiting cytonuclear disequilibrium relative to mitotype. Although these data confirm our previous explorations of this species, it is likely that some of the nuclear genomic diversity of this species has yet to be explored, as comparison with other barnacle phylogeography studies suggest that a divergence of similar magnitude should be found in the nuclear genome somewhere else in the species range.
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Haye PA, Muñoz-Herrera NC. Isolation with differentiation followed by expansion with admixture in the tunicate Pyura chilensis. BMC Evol Biol 2013; 13:252. [PMID: 24238017 PMCID: PMC3840596 DOI: 10.1186/1471-2148-13-252] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Accepted: 10/29/2013] [Indexed: 11/21/2022] Open
Abstract
Background Pyura chilensis, a tunicate commercially exploited as food resource in Chile, is subject to management strategies, including restocking. The goal of this study was to examine the genetic structure of P. chilensis using information from a mitochondrial gene (Cytochrome Oxidase I, COI) and a nuclear gene (Elongation 1 alpha, EF1a), to characterize the geographic distribution of genetic diversity and differentiation, and to identify the main processes that have shaped it. We analyzed 268 and 208 sequences of COI and EF1a, respectively, from samples of eight local populations covering ca. 1800 km. Results For Pyura chilensis, partial sequences of the gene COI revealed three highly supported haplogroups that diverged 260000 to 470000 years ago. Two haplogroups currently are widely distributed and sympatric, while one is dominant only in Los Molinos (LM, 39°50′S). The two widespread COI haplogroups underwent a geographic expansion during an interglacial period of the Late Pleistocene ca. 100000 years ago. The nuclear gene was less divergent and did not resolve the COI haplogroups. Bayesian clustering of the nuclear gene’s SNPs revealed that individuals from the two widespread COI haplogroups were mostly assigned to two of the three detected clusters and had a marked degree of admixture. The third cluster predominated in LM and showed low admixture. Haplotypic diversity of both genes was very high, there was no isolation by distance, and most localities were genetically undifferentiated; only LM was consistently differentiated with both genes analyzed. Conclusions Pyura chilensis has less genetic structure than expected given its life history, which could be a consequence of dispersal on ship hulls. The only differentiated local population analyzed was LM. Coincidentally, it is the one furthest away from main maritime routes along the coast of Chile. The use of mitochondrial and nuclear markers allowed detection of divergent mitochondrial haplogroups in P. chilensis, two of which revealed nuclear admixture. The genetic structure of P. chilensis has likely been shaped by Pleistocene’s climatic effect on sea level leading to population contraction with isolation, followed by geographic range expansions with concomitant secondary contact and admixture.
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Affiliation(s)
- Pilar A Haye
- Laboratorio de Diversidad Molecular, Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Casilla 117, Coquimbo, Chile.
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Assis J, Castilho Coelho N, Alberto F, Valero M, Raimondi P, Reed D, Serrão EA. High and distinct range-edge genetic diversity despite local bottlenecks. PLoS One 2013; 8:e68646. [PMID: 23967038 PMCID: PMC3744244 DOI: 10.1371/journal.pone.0068646] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 05/30/2013] [Indexed: 11/18/2022] Open
Abstract
The genetic consequences of living on the edge of distributional ranges have been the subject of a largely unresolved debate. Populations occurring along persistent low latitude ranges (rear-edge) are expected to retain high and unique genetic diversity. In contrast, currently less favourable environmental conditions limiting population size at such range-edges may have caused genetic erosion that prevails over past historical effects, with potential consequences on reducing future adaptive capacity. The present study provides an empirical test of whether population declines towards a peripheral range might be reflected on decreasing diversity and increasing population isolation and differentiation. We compare population genetic differentiation and diversity with trends in abundance along a latitudinal gradient towards the peripheral distribution range of Saccorhiza polyschides, a large brown seaweed that is the main structural species of kelp forests in SW Europe. Signatures of recent bottleneck events were also evaluated to determine whether the recently recorded distributional shifts had a negative influence on effective population size. Our findings show decreasing population density and increasing spatial fragmentation and local extinctions towards the southern edge. Genetic data revealed two well supported groups with a central contact zone. As predicted, higher differentiation and signs of bottlenecks were found at the southern edge region. However, a decrease in genetic diversity associated with this pattern was not verified. Surprisingly, genetic diversity increased towards the edge despite bottlenecks and much lower densities, suggesting that extinctions and recolonizations have not strongly reduced diversity or that diversity might have been even higher there in the past, a process of shifting genetic baselines.
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Affiliation(s)
- Jorge Assis
- Centro de Ciências do Mar do Algarve, CIMAR-Laboratório Associado, University of Algarve, Campus de Gambelas, Faro, Portugal.
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Turchetto-Zolet AC, Pinheiro F, Salgueiro F, Palma-Silva C. Phylogeographical patterns shed light on evolutionary process in South America. Mol Ecol 2012; 22:1193-213. [PMID: 23279129 DOI: 10.1111/mec.12164] [Citation(s) in RCA: 214] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Revised: 10/31/2012] [Accepted: 11/06/2012] [Indexed: 11/28/2022]
Abstract
The South American continent is composed of several biogeographical regions harbouring the highest biodiversity on the globe, encompassing five of the world's biodiversity 'hot spots'. Nonetheless, the patterns and processes responsible for shaping its astonishing species diversity are largely unknown. Here, we present a review of current South American phylogeographical knowledge based on published articles on this topic. An appraisal of the literature reveals emerging phylogeographical patterns in the biota of South America. The striking phylogeographical divergence observed among organism lineages in South American studies is suggestive of high levels of undocumented species diversity. The interplay between Pleistocene climatic oscillations and Pliocene/Miocene orogenic events has contributed to shaping the current diversity and distribution of modern lineages in both the tropical and temperate regions of South America. Although older divergence times were observed for a range of species, most herpetofauna underwent an intraspecific lineage split much earlier than other organisms. The geographical ranges of species associated with forest habitats were reduced mainly during glacial cycles, whereas species associated with open vegetation domains have shown variable responses to climatic oscillations. The results suggest a highly complex mosaic of phylogeographical patterns in South America. We suggest future research directions to promote a better understanding of the origin and maintenance of the South American biota.
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Affiliation(s)
- A C Turchetto-Zolet
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, IB/UFRGS, Porto Alegre, RS, Brazil
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Wieters EA, McQuaid C, Palomo G, Pappalardo P, Navarrete SA. Biogeographical boundaries, functional group structure and diversity of Rocky Shore communities along the Argentinean coast. PLoS One 2012; 7:e49725. [PMID: 23166756 PMCID: PMC3500334 DOI: 10.1371/journal.pone.0049725] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 10/17/2012] [Indexed: 11/18/2022] Open
Abstract
We investigate the extent to which functional structure and spatial variability of intertidal communities coincide with major biogeographical boundaries, areas where extensive compositional changes in the biota are observed over a limited geographic extension. We then investigate whether spatial variation in the biomass of functional groups, over geographic (10's km) and local (10's m) scales, could be associated to species diversity within and among these groups. Functional community structure expressed as abundance (density, cover and biomass) and composition of major functional groups was quantified through field surveys at 20 rocky intertidal shores spanning six degrees of latitude along the southwest Atlantic coast of Argentina and extending across the boundaries between the Argentinean and Magellanic Provinces. Patterns of abundance of individual functional groups were not uniformly matched with biogeographical regions. Only ephemeral algae showed an abrupt geographical discontinuity coincident with changes in biogeographic boundaries, and this was limited to the mid intertidal zone. We identified 3-4 main 'groups' of sites in terms of the total and relative abundance of the major functional groups, but these did not coincide with biogeographical boundaries, nor did they follow latitudinal arrangement. Thus, processes that determine the functional structure of these intertidal communities are insensitive to biogeographical boundaries. Over both geographical and local spatial scales, and for most functional groups and tidal levels, increases in species richness within the functional group was significantly associated to increased total biomass and reduced spatial variability of the group. These results suggest that species belonging to the same functional group are sufficiently uncorrelated over space (i.e. metres and site-to-site ) to stabilize patterns of biomass variability and, in this manner, provide a buffer, or "insurance", against spatial variability in environmental conditions.
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Affiliation(s)
- Evie A Wieters
- Department of Zoology and Entomology, Rhodes University, Grahamstown, South Africa.
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González A, Beltrán J, Hiriart-Bertrand L, Flores V, de Reviers B, Correa JA, Santelices B. IDENTIFICATION OF CRYPTIC SPECIES IN THE LESSONIA NIGRESCENS COMPLEX (PHAEOPHYCEAE, LAMINARIALES)(1). JOURNAL OF PHYCOLOGY 2012; 48:1153-1165. [PMID: 27011275 DOI: 10.1111/j.1529-8817.2012.01200.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The kelp Lessonia nigrescens Bory is the most ecologically and economically important seaweed in rocky intertidal and shallow subtidal habitats along the temperate Pacific South American coasts. Recent molecular studies suggest the existence of two lineages, one (northern lineage) from 17° S to 30° S and a second (central lineage) from 29° S to 41° S. To identify and name these lineages we performed morphological, nomenclatural and field studies. Four external and three internal anatomical traits permitted a morphological separation of the two lineages. The internal structure of both lineages was different from the isolectotype of Lessonia nigrescens. It is therefore concluded that the name Lessonia nigrescens should not be used for the Chilean material. Chordaria spicata Suhr appears as the oldest available name for the central lineage, while Lessonia berteroana Montagne is the oldest name for the northern lineage. In both cases, the type material consisted of small-sized, apical branches of larger plants. The new combination Lessonia spicata (Suhr) Santelices is proposed for the central lineage and we reinstate Lessonia berteroana for the northern lineage. Laminaria scissa Suhr is reduced to synonym of L. spicata. Representative specimens of Lessonia nigrescens were not found during new visits to its type locality in Cape Horn and along Chile. Future studies should verify the status of this species.
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Affiliation(s)
- Alejandra González
- Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, ChileCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, ChileMuseum National d'Histoire Naturelle, Department Systematique et Evolution, Batiment de Cryptogamie, 57, rue Cuvier 75231, Paris, Cedex 05, FranceCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Jessica Beltrán
- Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, ChileCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, ChileMuseum National d'Histoire Naturelle, Department Systematique et Evolution, Batiment de Cryptogamie, 57, rue Cuvier 75231, Paris, Cedex 05, FranceCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Luciano Hiriart-Bertrand
- Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, ChileCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, ChileMuseum National d'Histoire Naturelle, Department Systematique et Evolution, Batiment de Cryptogamie, 57, rue Cuvier 75231, Paris, Cedex 05, FranceCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Verónica Flores
- Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, ChileCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, ChileMuseum National d'Histoire Naturelle, Department Systematique et Evolution, Batiment de Cryptogamie, 57, rue Cuvier 75231, Paris, Cedex 05, FranceCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Bruno de Reviers
- Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, ChileCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, ChileMuseum National d'Histoire Naturelle, Department Systematique et Evolution, Batiment de Cryptogamie, 57, rue Cuvier 75231, Paris, Cedex 05, FranceCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Juan A Correa
- Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, ChileCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, ChileMuseum National d'Histoire Naturelle, Department Systematique et Evolution, Batiment de Cryptogamie, 57, rue Cuvier 75231, Paris, Cedex 05, FranceCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Bernabé Santelices
- Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, ChileCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, ChileMuseum National d'Histoire Naturelle, Department Systematique et Evolution, Batiment de Cryptogamie, 57, rue Cuvier 75231, Paris, Cedex 05, FranceCenter for Advanced Studies in Ecology and Biodiversity and Departmento de Ecología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
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Montecinos A, Broitman BR, Faugeron S, Haye PA, Tellier F, Guillemin ML. Species replacement along a linear coastal habitat: phylogeography and speciation in the red alga Mazzaella laminarioides along the south east Pacific. BMC Evol Biol 2012; 12:97. [PMID: 22731925 PMCID: PMC3483259 DOI: 10.1186/1471-2148-12-97] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Accepted: 05/24/2012] [Indexed: 11/30/2022] Open
Abstract
Background The Chilean shoreline, a nearly strait line of coast expanding across 35 latitudinal degrees, represents an interesting region to assess historical processes using phylogeographic analyses. Stretching along the temperate section of the East Pacific margin, the region is characterized by intense geologic activity and has experienced drastic geomorphological transformations linked to eustatic and isostatic changes during the Quaternary. In this study, we used two molecular markers to evaluate the existence of phylogeographic discontinuities and detect the genetic footprints of Pleistocene glaciations among Patagonian populations of Mazzaella laminarioides, a low-dispersal benthic intertidal red seaweed that inhabits along ~3,700 km of the Chilean coastal rocky shore. Results Three main genetic lineages were found within M. laminarioides. They are distributed along the Chilean coast in strict parapatry. The deep divergence among lineages suggests that they could be considered putative genetic sibling species. Unexpectedly, genetic breaks were not strictly concordant with the biogeographic breaks described in the region. A Northern lineage was restricted to a broad transition zone located between 30°S and 33°S and showed signals of a recent bottleneck. The reduction of population size could be related to warm events linked to El Niño Southern Oscillation, which is known to cause massive seaweed mortality in this region. To the south, we propose that transient habitat discontinuities driven by episodic tectonic uplifting of the shoreline around the Arauco region (37°S-38°S); one of the most active forearc-basins in the South East Pacific; could be at the origin of the Central/South genetic break. The large beaches, located around 38°S, are likely to contribute to the lineages’ integrity by limiting present gene flow. Finally, the Southern lineage, occupies an area affected by ice-cover during the last glaciations. Phylogeny suggested it is a derived clade and demographic analyses showed the lineage has a typical signature of postglacial recolonization from a northern glacial refugium area. Conclusions Even if environmental adaptation could have strengthened divergence among lineages in M. laminarioides, low dispersal capacity and small population size are sufficient to generate phylogeographic discontinuities determined by genetic drift alone. Interestingly, our results confirm that seaweed population connectivity over large geographic scales does not rely only on dispersal capacity but also seem to depend highly on substratum availability and population density of the receiving locality.
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Affiliation(s)
- Alejandro Montecinos
- Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Campus Isla Teja, Casilla 567, Valdivia, Chile
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Oppliger LV, Correa JA, Engelen AH, Tellier F, Vieira V, Faugeron S, Valero M, Gomez G, Destombe C. Temperature effects on gametophyte life-history traits and geographic distribution of two cryptic kelp species. PLoS One 2012; 7:e39289. [PMID: 22723987 PMCID: PMC3377671 DOI: 10.1371/journal.pone.0039289] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 05/21/2012] [Indexed: 11/19/2022] Open
Abstract
A major determinant of the geographic distribution of a species is expected to be its physiological response to changing abiotic variables over its range. The range of a species often corresponds to the geographic extent of temperature regimes the organism can physiologically tolerate. Many species have very distinct life history stages that may exhibit different responses to environmental factors. In this study we emphasized the critical role of the haploid microscopic stage (gametophyte) of the life cycle to explain the difference of edge distribution of two related kelp species. Lessonia nigrescens was recently identified as two cryptic species occurring in parapatry along the Chilean coast: one located north and the other south of a biogeographic boundary at latitude 29-30°S. Six life history traits from microscopic stages were identified and estimated under five treatments of temperature in eight locations distributed along the Chilean coast in order to (1) estimate the role of temperature in the present distribution of the two cryptic L. nigrescens species, (2) compare marginal populations to central populations of the two cryptic species. In addition, we created a periodic matrix model to estimate the population growth rate (λ) at the five temperature treatments. Differential tolerance to temperature was demonstrated between the two species, with the gametophytes of the Northern species being more tolerant to higher temperatures than gametophytes from the south. Second, the two species exhibited different life history strategies with a shorter haploid phase in the Northern species contrasted with considerable vegetative growth in the Southern species haploid stage. These results provide strong ecological evidence for the differentiation process of the two cryptic species and show local adaptation of the life cycle at the range limits of the distribution. Ecological and evolutionary implications of these findings are discussed.
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Affiliation(s)
- L. Valeria Oppliger
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biologicas, Pontificia Universidad Católica de Chile, Santiago, Chile
- UPMC Station Biologique de Roscoff, Equipe Biologie Evolutive et Diversité Marine, “BEDIM”, UMR 7144, BP 74, Roscoff, France
- CNRS Station Biologique de Roscoff, Equipe Biologie Evolutive et Diversité Marine, “BEDIM”, UMR 7144, BP 74, Roscoff, France
| | - Juan A. Correa
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biologicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Aschwin H. Engelen
- Centre of Marine Sciences (CCMAR), CIMAR – Laboratório Associado, Universidade do Algarve, Campus de Gambelas, Faro, Portugal
| | - Florence Tellier
- Departamento de Ecología, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile
| | - Vasco Vieira
- Centre of Marine Sciences (CCMAR), CIMAR – Laboratório Associado, Universidade do Algarve, Campus de Gambelas, Faro, Portugal
| | - Sylvain Faugeron
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biologicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Myriam Valero
- UPMC Station Biologique de Roscoff, Equipe Biologie Evolutive et Diversité Marine, “BEDIM”, UMR 7144, BP 74, Roscoff, France
- CNRS Station Biologique de Roscoff, Equipe Biologie Evolutive et Diversité Marine, “BEDIM”, UMR 7144, BP 74, Roscoff, France
| | - Gonzalo Gomez
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biologicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Christophe Destombe
- UPMC Station Biologique de Roscoff, Equipe Biologie Evolutive et Diversité Marine, “BEDIM”, UMR 7144, BP 74, Roscoff, France
- CNRS Station Biologique de Roscoff, Equipe Biologie Evolutive et Diversité Marine, “BEDIM”, UMR 7144, BP 74, Roscoff, France
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Neiva J, Pearson GA, Valero M, Serrão EA. Fine-scale genetic breaks driven by historical range dynamics and ongoing density-barrier effects in the estuarine seaweed Fucus ceranoides L. BMC Evol Biol 2012; 12:78. [PMID: 22672720 PMCID: PMC3483196 DOI: 10.1186/1471-2148-12-78] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Accepted: 05/14/2012] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Factors promoting the emergence of sharp phylogeographic breaks include restricted dispersal, habitat discontinuity, physical barriers, disruptive selection, mating incompatibility, genetic surfing and secondary contact. Disentangling the role of each in any particular system can be difficult, especially when species are evenly distributed across transition zones and dispersal barriers are not evident. The estuarine seaweed Fucus ceranoides provides a good example of highly differentiated populations along its most persistent distributional range at the present rear edge of the species distribution, in NW Iberia. Intrinsic dispersal restrictions are obvious in this species, but have not prevented F. ceranoides from vastly expanding its range northwards following the last glaciation, implying that additional factors are responsible for the lack of connectivity between neighbouring southern populations. In this study we analyze 22 consecutive populations of F. ceranoides along NW Iberia to investigate the processes generating and maintaining the observed high levels of regional genetic divergence. RESULTS Variation at seven microsatellite loci and at mtDNA spacer sequences was concordant in revealing that Iberian F. ceranoides is composed of three divergent genetic clusters displaying nearly disjunct geographical distributions. Structure and AFC analyses detected two populations with an admixed nuclear background. Haplotypic diversity was high in the W sector and very low in the N sector. Within each genetic cluster, population structure was also pervasive, although shallower. CONCLUSIONS The deep divergence between sectors coupled with the lack of support for a role of oceanographic barriers in defining the location of breaks suggested 1) that the parapatric genetic sectors result from the regional reassembly of formerly vicariant sub-populations, and 2) that the genetic discontinuities at secondary contact zones (and elsewhere) are maintained despite normal migration rates. We conclude that colonization and immigration, as sources of gene-flow, have very different genetic effects. Migration between established populations is effectively too low to prevent their differentiation by drift or to smooth historical differences inherited from the colonization process. F. ceranoides, but possibly low-dispersal species in general, appear to be unified to a large extent by historical, non-equilibrium processes of extinction and colonization, rather than by contemporary patterns of gene flow.
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Affiliation(s)
- João Neiva
- Centro de Ciências do Mar, Centro de Investigação Marinha e Ambiental - Laboratório Associado, Universidade do Algarve, Gambelas, Faro, 8005-139, Portugal
- Unité Mixte de Recherche 7144, Centre National de la Recherche Scientifique/Université Pierre et Marie Curie, Station Biologique de Roscoff, Place Georges-Teissier, BP 74, Roscoff Cedex, 29682, France
| | - Gareth A Pearson
- Centro de Ciências do Mar, Centro de Investigação Marinha e Ambiental - Laboratório Associado, Universidade do Algarve, Gambelas, Faro, 8005-139, Portugal
| | - Myriam Valero
- Unité Mixte de Recherche 7144, Centre National de la Recherche Scientifique/Université Pierre et Marie Curie, Station Biologique de Roscoff, Place Georges-Teissier, BP 74, Roscoff Cedex, 29682, France
| | - Ester A Serrão
- Centro de Ciências do Mar, Centro de Investigação Marinha e Ambiental - Laboratório Associado, Universidade do Algarve, Gambelas, Faro, 8005-139, Portugal
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Brante A, Fernández M, Viard F. Phylogeography and biogeography concordance in the marine gastropod Crepipatella dilatata (Calyptraeidae) along the southeastern Pacific coast. ACTA ACUST UNITED AC 2012; 103:630-7. [PMID: 22573790 DOI: 10.1093/jhered/ess030] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The biogeography and phylogeography concordance hypothesis suggests that the same factors, for instance physical barriers or environmental gradients, shape both species assemblages and intraspecific genetic structure. In the marine realm, previous studies have however suggested that phylogeographic patterns are also explained by the life-history strategy of the species. However, evidence is contradictory and comes mainly from the northern hemisphere, which is characterized by specific environmental conditions and evolutionary histories of species. In this work, we evaluated the concordance hypothesis in the southern Pacific using the marine gastropod Crepipatella dilatata as a case study. This intertidal species with direct development exhibited a restricted dispersal potential, a feature that contrasts with previous species studied in the same area. Using the gene cytochrome oxidase I, we analyzed 253 individuals sampled at 10 locations covering 543 km of the coast of Chile. The study sites also incorporated 2 biogeographic regions separated by a well-studied biogeographic break (at 30°S). Populations of C. dilatata displayed a high degree of genetic structure and a perfect match between phylogeographic and biogeographic breaks at 30°S. When comparing our data with previous research over the same geographic range, life history traits related to dispersal ability seem to be a good proxy for explaining the concordance between biogeography and phylogeography along the southeastern pacific coast. In addition, in this and other marine invertebrate species, gene flow limitations across both sides of the 30°S break may act as a driver of the speciation process.
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Affiliation(s)
- Antonio Brante
- Departamento de Ecología, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile.
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Contreras-Porcia L, Callejas S, Thomas D, Sordet C, Pohnert G, Contreras A, Lafuente A, Flores-Molina MR, Correa JA. Seaweeds early development: detrimental effects of desiccation and attenuation by algal extracts. PLANTA 2012; 235:337-348. [PMID: 21909760 DOI: 10.1007/s00425-011-1512-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Accepted: 08/25/2011] [Indexed: 05/31/2023]
Abstract
The effects of desiccation on the early development stages of Mazzaella laminarioides, Scytosiphon lomentaria and Lessonia nigrescens, algal species with different patterns of distribution across the intertidal zone, were examined in the laboratory. In addition, the protective effect against desiccation was evaluated using algal extracts, including those from Porphyra columbina, a macroalga tolerant to desiccation that lives in the uppermost part of the intertidal zone. Our results showed that M. laminarioides displayed the highest resistance to daily desiccation, followed by S. lomentaria, whereas L. nigrescens was the most susceptible. Spores from L. nigrescens exposed to desiccation, although being able to germinate, ceased further post-germination development. In addition, our results showed that all species exposed to extracts from desiccated P. columbina successfully completed their development and strongly suggest the occurrence of compounds with protective properties that help in attenuating the stress caused by desiccation. Finally, our results indicate that the magnitude of the effects generated by desiccation on the early algal development is related to the position of the species in the intertidal zone, and that the protective effects of P. columbina extracts reveal an exceptional metabolism of this species under desiccation stress.
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Affiliation(s)
- Loretto Contreras-Porcia
- Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andrés Bello, República 470, 8370251 Santiago, Chile.
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Tellier F, Tapia J, Faugeron S, Destombe C, Valero M. THE LESSONIA NIGRESCENS SPECIES COMPLEX (LAMINARIALES, PHAEOPHYCEAE) SHOWS STRICT PARAPATRY AND COMPLETE REPRODUCTIVE ISOLATION IN A SECONDARY CONTACT ZONE(1). JOURNAL OF PHYCOLOGY 2011; 47:894-903. [PMID: 27020024 DOI: 10.1111/j.1529-8817.2011.01019.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
During secondary contact between phylogenetically closely related species (sibling species) having diverged in allopatry, the maintenance of species integrity depends on intrinsic and extrinsic reproductive barriers. In kelps (Phaeophyceae), the observations of hybrids in laboratory conditions suggest that reproductive isolation is incomplete. However, not all interspecific crosses are successful, and very few hybrids have been observed in nature, despite the co-occurrence of many kelp species in sympatry. This suggests that there are reproductive barriers that maintain species integrity. In this study, we characterized the fine genetic structure of a secondary contact zone to clarify the extent of reproductive isolation between two sister species. In Lessonia nigrescens Bory (Laminariales, Phaeophyta) species complex, two cryptic species have been recently found out from gene phylogenies, and-waiting for a formal taxonomic description-we used their geographic distribution to name them (northern and southern species). We studied 12 populations, distributed along 50 km of coastline, and employed two molecular approaches, assigning individuals to phylogenetic species according to a diagnostic mitochondrial marker (351 individuals analyzed) and quantifying interspecific gene flow with four microsatellite markers (248 individuals analyzed). No hybridization or introgression was revealed, indicating complete reproductive isolation in natural conditions. Unexpectedly, our study demonstrated that the two species were strictly segregated in space. This absence of co-occurrence along the contact zone can partially explain the lack of hybridization, raising new interesting questions as to the mechanisms that limit sympatry at small spatial scales.
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Affiliation(s)
- Florence Tellier
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France Facultad de Ciencias del Mar, Universidad Católica del Norte & CEAZA, Larrondo 1281, Coquimbo, ChileCenter for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Javier Tapia
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France Facultad de Ciencias del Mar, Universidad Católica del Norte & CEAZA, Larrondo 1281, Coquimbo, ChileCenter for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Sylvain Faugeron
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France Facultad de Ciencias del Mar, Universidad Católica del Norte & CEAZA, Larrondo 1281, Coquimbo, ChileCenter for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Christophe Destombe
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France Facultad de Ciencias del Mar, Universidad Católica del Norte & CEAZA, Larrondo 1281, Coquimbo, ChileCenter for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Myriam Valero
- Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France Facultad de Ciencias del Mar, Universidad Católica del Norte & CEAZA, Larrondo 1281, Coquimbo, ChileCenter for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, "LIA DIAMS", Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe "BEDIM", LIA "DIAMS", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
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Valeria Oppliger L, Correa JA, Faugeron S, Beltrán J, Tellier F, Valero M, Destombe C. SEX RATIO VARIATION IN THE LESSONIA NIGRESCENS COMPLEX (LAMINARIALES, PHAEOPHYCEAE): EFFECT OF LATITUDE, TEMPERATURE, AND MARGINALITY(1). JOURNAL OF PHYCOLOGY 2011; 47:5-12. [PMID: 27021705 DOI: 10.1111/j.1529-8817.2010.00930.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Little is known about variation of sex ratio, the proportion of males to females, in natural populations of seaweed, though it is a major determinant of the mating system. The observation of sexual chromosomes in kelps suggested that sex is partly genetically determined. However, it is probably not purely genetic since the sex ratio can be modified by environmental factors such as salinity or temperature. In this paper, sex ratio variation was studied in the kelp Lessonia nigrescens Bory complex, recently identified as two cryptic species occurring along the Chilean coast: one located north and the other south of the biogeographic boundary at latitude 29°-30° S. The life cycle of L. nigrescens is characterized by an alternation of microscopic haploid gametophytic individuals and large macroscopic fronds of diploid sporophytes. The sex ratio was recorded in progenies from 241 sporophytic individuals collected from 13 populations distributed along the Chilean coast in order (i) to examine the effect of an environmental gradient coupled with latitude, and (ii) to compare marginal populations to central populations of the two species. In addition, we tested the hypothesis that the sex ratios of the two cryptic species would be affected differently by temperature. First, our results demonstrate that sex ratio seems to be mainly genetically determined and temperature can significantly modify it. Populations of the northern species showed a lower frequency of males at 14°C than at 10°C, whereas populations of the southern species showed the opposite pattern. Second, both species displayed an increased variation in sex ratio at the range limits. This greater variation at the margins could be due either to differential mortality between sexes or to geographic parthenogenesis (asexual reproduction).
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Affiliation(s)
- Luz Valeria Oppliger
- Departamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, FranceDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, ChileDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, CNRS, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CEAZA, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Juan A Correa
- Departamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, FranceDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, ChileDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, CNRS, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CEAZA, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Sylvain Faugeron
- Departamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, FranceDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, ChileDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, CNRS, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CEAZA, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Jessica Beltrán
- Departamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, FranceDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, ChileDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, CNRS, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CEAZA, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Florence Tellier
- Departamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, FranceDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, ChileDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, CNRS, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CEAZA, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Myriam Valero
- Departamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, FranceDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, ChileDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, CNRS, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CEAZA, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
| | - Christophe Destombe
- Departamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, FranceDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, ChileDepartamento de Ecología, Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Post-code 6513677, Santiago, Chile, UPMC Univ. Paris 06, CNRS, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France, CEAZA, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile UPMC Univ. Paris 06, UMR 7144, Equipe "BEDIM", Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France
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Thomas D, Beltrán J, Flores V, Contreras L, Bollmann E, Correa JA. LAMINARIOCOLAX SP. (PHAEOPHYCEAE) ASSOCIATED WITH GALL DEVELOPMENTS IN LESSONIA NIGRESCENS (PHAEOPHYCEAE)(1). JOURNAL OF PHYCOLOGY 2009; 45:1252-8. [PMID: 27032580 DOI: 10.1111/j.1529-8817.2009.00749.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
As part of a long-term study on the biology and ecology of the intertidal kelp Lessonia nigrescens Bory, we report on the occurrence of gall development on this alga, identified the possible causal agent, and assessed the extent of the phenomenon in two wild stands of the host. Our results showed that galls affecting natural populations of L. nigrescens were associated with the infection by a filamentous brown algal endophyte of the genus Laminariocolax. Assignment to Laminariocolax of the endophytes isolated from cultured gall tissue was based on the (i) high internal transcribed spacer 1 (ITS1) sequence similarity and phylogenetic relationship between the Chilean isolates and several species of the genus Laminariocolax endophytic in other kelps, (ii) reproductive and vegetative features of the endophyte in culture, and (iii) anatomical agreement of fully developed galls of Lessonia with those described for other kelp galls caused by endophytic members of Laminariocolax. Unequivocal identification at the species level of the endophytes infecting Lessonia, however, awaits further studies.
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Affiliation(s)
- Daniela Thomas
- Departamento de Ecología and Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Jessica Beltrán
- Departamento de Ecología and Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Verónica Flores
- Departamento de Ecología and Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Loretto Contreras
- Departamento de Ecología and Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Edda Bollmann
- Departamento de Ecología and Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
| | - Juan A Correa
- Departamento de Ecología and Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile
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