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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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2
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Bemmels JB, Haddrath O, Colbourne RM, Robertson HA, Weir JT. Legacy of supervolcanic eruptions on population genetic structure of brown kiwi. Curr Biol 2022; 32:3389-3397.e8. [PMID: 35728597 DOI: 10.1016/j.cub.2022.05.064] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/09/2022] [Accepted: 05/31/2022] [Indexed: 10/18/2022]
Abstract
Supervolcanoes are volcanoes capable of mega-colossal eruptions that emit more than 1,000 km3 of ash and other particles.1 The earth's most recent mega-colossal eruption was the Oruanui eruption of the Taupo supervolcano 25,580 years before present (YBP) on the central North Island of New Zealand.2 This eruption blanketed major swaths of the North Island in thick layers of ash and igneous rock,2,3 devastating habitats and likely causing widespread population extinctions.4-7 An additional devastating super-colossal eruption (>100 km3) of the Taupo supervolcano occurred approximately 1,690 YBP.8 The impacts of such massive but ephemeral natural disasters on contemporary population genetic structure remain underexplored. Here, we combined data for 4,951 SNPs with spatially explicit demographic and coalescent models within an approximate Bayesian computation framework to test the drivers of genetic structure in brown kiwi (Apteryx mantelli). Our results strongly support the importance of eruptions of the Taupo supervolcano in restructuring pre-existing geographic patterns of population differentiation and genetic diversity. Range shifts due to climatic oscillations-a frequent explanation for genetic structure9-are insufficient to fully explain the empirical data. Meanwhile, recent range contraction and fragmentation due to historically documented anthropogenic habitat alteration adds no explanatory power to our models. Our results support a major role for cycles of destruction and post-volcanic recolonization in restructuring the population genomic landscape of brown kiwi and highlight how ancient and ephemeral mega-disasters may leave a lasting legacy on patterns of intraspecific genetic variation.
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Affiliation(s)
- Jordan B Bemmels
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada.
| | - Oliver Haddrath
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada; Department of Natural History, Royal Ontario Museum, Toronto, ON M5S 2C6, Canada
| | - Rogan M Colbourne
- Department of Conservation, PO Box 10420, Wellington 6140, New Zealand
| | - Hugh A Robertson
- Department of Conservation, PO Box 10420, Wellington 6140, New Zealand
| | - Jason T Weir
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada; Department of Natural History, Royal Ontario Museum, Toronto, ON M5S 2C6, Canada.
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3
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Walters AD, Trujillo DA, Berg DJ. Micro-endemic species of snails and amphipods show population genetic structure across very small geographic ranges. Heredity (Edinb) 2022; 128:325-337. [PMID: 35318433 PMCID: PMC9076663 DOI: 10.1038/s41437-022-00521-5] [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: 12/01/2020] [Revised: 02/22/2022] [Accepted: 02/22/2022] [Indexed: 11/08/2022] Open
Abstract
Understanding variation in population genetic structure, even across small distances and for species with extremely limited ranges, is critical for conservation planning and the development of effective management strategies for imperiled species. Organisms that occupy the same geographic extent can maintain different population structures, ranging from highly diverged to panmictic. Such differences can result from differences in biological characteristics such as dispersal ability or demographic history. We used microsatellite loci to evaluate population genetic structure and variation of four desert spring invertebrates having high to low dispersal ability: the lung snail Physa acuta, two species of gilled snails (Juturnia kosteri and Pyrgulopsis roswellensis; family Hydrobiidae) and the amphipod Gammarus desperatus. The study location represents entire species ranges for the micro-endemic hydrobiids and G. desperatus, while P. acuta is ubiquitous throughout much of North America. We found little evidence of significant population genetic structure for P. acuta and J. kosteri, but much more for P. roswellensis and G. desperatus. Our results demonstrate differences in habitat preference and/or dispersal ability between the species. This information provides insight into how gene flow shapes varying population genetic structure between species across small spatial scales (<100 km2). Most importantly, our results suggest that conservation agencies should not consider these micro-endemic species to be composed of single populations, but rather, that management plans for such species should account for population genetic variation across the species' ranges.
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Affiliation(s)
| | | | - David J Berg
- Department of Biology, Miami University, Hamilton, OH, USA
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Different Species Requirements within a Heterogeneous Spring Complex Affects Patch Occupancy of Threatened Snails in Australian Desert Springs. WATER 2020. [DOI: 10.3390/w12102942] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
(1) The distribution of organisms that inhabit patchy systems is dictated by their ability to move between patches, and the suitability of environmental conditions at patches to which they disperse. Understanding whether the species involved are identical to one another in their environmental requirements and their responses to variance in their environment is essential to understanding ecological processes in these systems, and to the management of species whose patchy and limited distributions present conservation risks. (2) Artesian springs in Australia’s arid interior are “islands” of hospitable wetland in uninhabitable “oceans” of dry land and are home to diverse and threatened assemblages of endemic species with severely restricted distributions. Many have strict environmental requirements, but the role of environmental heterogeneity amongst springs has rarely been considered alongside conventional patch characteristics (isolation and patch geometry). (3) We quantified environmental heterogeneity across springs, and the relationship between spring size, isolation (distances to neighbours) and environmental quality (depth, water chemistry), and patterns of occupancy and population persistence of six endemic spring snail species, all from different families, and with all restricted to a single <8000 ha system of springs in Australia. To do so, a survey was conducted for comparison against survey results of almost a decade before, and environmental variables of the springs were measured. Many of the snail species occupied few sites, and environmental variables strongly covaried, so an ordination-based approach was adopted to assess the relationship between environmental measures and the distribution of each species, and also whether springs that held a higher diversity of snails had specific characteristics. (4) Each snail species occupied a subset of springs (between 5% and 36% of the 85 sampled) and was associated with a particular set of conditions. Of the six species considered in further detail, most were restricted to the few springs that were large and deep. Species in family Tateidae were distinct in having colonised highly isolated springs (with >300 m to nearest neighbour). Springs with highest diversity were significantly larger, deeper and had more numerous neighbours within 300 m than those devoid of endemic snails, or those with low diversity. (5) Although spring size and isolation affect patterns of occupancy, the six snail species had significantly different environmental requirements from one another and these correlated with the distribution pattern of each. Approaches that ignore the role of environmental quality—and particularly depth in springs—are overlooking important processes outside of patch geometry that influence diversity. These organisms are highly susceptible to extinction, as most occupy less than 3 ha of habitat spread across few springs, and habitat degradation continues to compromise what little wetland area is needed for their persistence.
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Becheler R, Guillemin M, Stoeckel S, Mauger S, Saunier A, Brante A, Destombe C, Valero M. After a catastrophe, a little bit of sex is better than nothing: Genetic consequences of a major earthquake on asexual and sexual populations. Evol Appl 2020; 13:2086-2100. [PMID: 32908606 PMCID: PMC7463374 DOI: 10.1111/eva.12967] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 03/04/2020] [Accepted: 03/05/2020] [Indexed: 11/27/2022] Open
Abstract
Catastrophic events can have profound effects on the demography of a population and consequently on genetic diversity. The dynamics of postcatastrophic recovery and the role of sexual versus asexual reproduction in buffering the effects of massive perturbations remain poorly understood, in part because the opportunity to document genetic diversity before and after such events is rare. Six natural (purely sexual) and seven cultivated (mainly clonal due to farming practices) populations of the red alga Agarophyton chilense were surveyed along the Chilean coast before, in the days after and 2 years after the 8.8 magnitude earthquake in 2010. The genetic diversity of sexual populations appeared sensitive to this massive perturbation, notably through the loss of rare alleles immediately after the earthquake. By 2012, the levels of diversity returned to those observed before the catastrophe, probably due to migration. In contrast, enhanced rates of clonality in cultivated populations conferred a surprising ability to buffer the instantaneous loss of diversity. After the earthquake, farmers increased the already high rate of clonality to maintain the few surviving beds, but most of them collapsed rapidly. Contrasting fates between sexual and clonal populations suggest that betting on strict clonality to sustain production is risky, probably because this extreme strategy hampered adaptation to the brutal environmental perturbation induced by the catastrophe.
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Affiliation(s)
- Ronan Becheler
- Centro de Conservación MarinaDepartamento de EcologíaFacultad de Ciencias BiológicasPontificia Universidad Católica de ChileCasillaChile
- UMI 3614Evolutionary Biology and Ecology of AlgaeCNRSSorbonne UniversitéUniversidad Austral de ChilePontificia Universidad Católica de ChileRoscoffFrance
| | - Marie‐Laure Guillemin
- UMI 3614Evolutionary Biology and Ecology of AlgaeCNRSSorbonne UniversitéUniversidad Austral de ChilePontificia Universidad Católica de ChileRoscoffFrance
- Instituto de Ciencias Ambientales y EvolutivasFacultad de CienciasUniversidad Austral de ChileValdiviaChile
| | - Solenn Stoeckel
- UMR1349 Institute for Genetics, Environment and Plant ProtectionINRALe RheuFrance
| | - Stéphane Mauger
- UMI 3614Evolutionary Biology and Ecology of AlgaeCNRSSorbonne UniversitéUniversidad Austral de ChilePontificia Universidad Católica de ChileRoscoffFrance
| | - Alice Saunier
- UMI 3614Evolutionary Biology and Ecology of AlgaeCNRSSorbonne UniversitéUniversidad Austral de ChilePontificia Universidad Católica de ChileRoscoffFrance
- Instituto de Ciencias Ambientales y EvolutivasFacultad de CienciasUniversidad Austral de ChileValdiviaChile
| | - Antonio Brante
- Departamento de EcologíaFacultad de CienciasUniversidad Católica de la Santísima Concepción (UCSC)ConcepciónChile
- Centro de Investigación en Biodiversidad y Ambientes Sustentables (CIBAS)UCSCConcepciónChile
| | - Christophe Destombe
- UMI 3614Evolutionary Biology and Ecology of AlgaeCNRSSorbonne UniversitéUniversidad Austral de ChilePontificia Universidad Católica de ChileRoscoffFrance
| | - Myriam Valero
- UMI 3614Evolutionary Biology and Ecology of AlgaeCNRSSorbonne UniversitéUniversidad Austral de ChilePontificia Universidad Católica de ChileRoscoffFrance
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Crowley GM, Preece ND. Does extreme flooding drive vegetation and faunal composition across the Gulf Plains of north-eastern Australia? AUSTRAL ECOL 2019. [DOI: 10.1111/aec.12803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gabriel M. Crowley
- The Cairns Institute; James Cook University; PO Box 6811 Cairns Queensland 4870 Australia
| | - Noel D. Preece
- Centre for Tropical Environmental and Sustainability Sciences, College of Science and Engineering; James Cook University; P.O. Box 6811 Cairns 4870 Queensland Australia
- Research Institute for the Environment and Livelihoods; Charles Darwin University; Darwin 0909 Northern Territory Australia
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7
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Inostroza PA, Vera-Escalona I, Wild R, Norf H, Brauns M. Tandem Action of Natural and Chemical Stressors in Stream Ecosystems: Insights from a Population Genetic Perspective. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7962-7971. [PMID: 29898597 DOI: 10.1021/acs.est.8b01259] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Agricultural and urban land use has dramatically increased over the last century and one consequence is the release of anthropogenic chemicals into aquatic ecosystems. One of the rarely studied consequences is the effect of land use change on internal concentrations of organic micropollutants (OMPs) in aquatic invertebrates and its effects on their genotype diversity. Here, we applied population genetic and internal concentrations of OMPs analyses to determine evolutionary implications of chemical pollution on Gammarus pulex populations from a natural and two agricultural streams. Along 14 consecutive months sampled, 26 different OMPs were quantified in G. pulex extracts with the highest number, concentration, and toxic pressure in the anthropogenically stressed stream ecosystems. Our results indicate distinct internal OMP profiles and changes in both genetic variation and genetic structure in streams affected by anthropogenic activity. Genetic variation was attributed to chemical pollution whereas changes in the genetic structure were attributed to environmental disturbances, such as changes in discharge in the impacted stream ecosystems, which worked both independently and in tandem. Finally, we conclude that human-impacted streams are subjected to severe alterations in their population genetic patterns compared to nonimpacted stream ecosystems.
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Affiliation(s)
- Pedro A Inostroza
- Department of River Ecology , Helmholtz Centre for Environmental Research - UFZ , Brückstraße 3A , Magdeburg , Germany
| | - Iván Vera-Escalona
- Department of Biology , Dalhousie University , 1355 Oxford St. , Halifax , Canada
| | - Romy Wild
- Department of River Ecology , Helmholtz Centre for Environmental Research - UFZ , Brückstraße 3A , Magdeburg , Germany
| | - Helge Norf
- Department of River Ecology , Helmholtz Centre for Environmental Research - UFZ , Brückstraße 3A , Magdeburg , Germany
- Department of Aquatic Ecosystem Analysis and Management , Helmholtz Centre for Environmental Research - UFZ , Brückstraße 3A , Magdeburg , Germany
| | - Mario Brauns
- Department of River Ecology , Helmholtz Centre for Environmental Research - UFZ , Brückstraße 3A , Magdeburg , Germany
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8
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Minton R, McGregor B, Hayes D, Paight C, Inoue K. Genetic structuring in the Pyramid Elimia, Elimia potosiensis (Gastropoda, Pleuroceridae), with implications for pleurocerid conservation. ZOOSYST EVOL 2017. [DOI: 10.3897/zse.93.14856] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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9
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Moran NP, Mossop KD, Thompson RM, Chapple DG, Wong BBM. Rapid divergence of animal personality and syndrome structure across an arid-aquatic habitat matrix. Oecologia 2017; 185:55-67. [PMID: 28779225 DOI: 10.1007/s00442-017-3924-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 07/28/2017] [Indexed: 11/27/2022]
Abstract
Intraspecific trait variation, including animal personalities and behavioural syndromes, affects how individual animals and populations interact with their environment. Within-species behavioural variation is widespread across animal taxa, which has substantial and unexplored implications for the ecological and evolutionary processes of animals. Accordingly, we sought to investigate individual behavioural characteristics in several populations of a desert-dwelling fish, the Australian desert goby (Chlamydogobius eremius). We reared first generation offspring in a common garden to compare non-ontogenic divergence in behavioural phenotypes between genetically interconnected populations from contrasting habitats (isolated groundwater springs versus hydrologically variable river waterholes). Despite the genetic connectedness of populations, fish had divergent bold-exploratory traits associated with their source habitat. This demonstrates divergence in risk-taking traits as a rapid phenotypic response to ecological pressures in arid aquatic habitats: neophilia may be suppressed by increased predation pressure and elevated by high intraspecific competition. Correlations between personality traits also differed between spring and river fish. River populations showed correlations between dispersal and novel environment behaviours, revealing an adaptive behavioural syndrome (related to dispersal and exploration) that was not found in spring populations. This illustrates the adaptive significance of heritable behavioural variation within and between populations, and their importance to animals persisting across contrasting habitats.
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Affiliation(s)
- Nicholas P Moran
- School of Biological Sciences, Monash University, Clayton, VIC, Australia.
| | - Krystina D Mossop
- School of Biological Sciences, Monash University, Clayton, VIC, Australia
| | - Ross M Thompson
- Institute for Applied Ecology, University of Canberra, Bruce, ACT, Australia
| | - David G Chapple
- School of Biological Sciences, Monash University, Clayton, VIC, Australia
| | - Bob B M Wong
- School of Biological Sciences, Monash University, Clayton, VIC, Australia
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Hsu JL, Kam S, Tammone MN, Lacey EA, Hadly EA. Rapid increase in genetic diversity in an endemic Patagonian tuco-tuco following a recent volcanic eruption. J Mammal 2017. [DOI: 10.1093/jmammal/gyx008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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11
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Murphy NP, Adams M, Guzik MT, Austin AD. Extraordinary micro-endemism in Australian desert spring amphipods. Mol Phylogenet Evol 2012; 66:645-53. [PMID: 23142695 DOI: 10.1016/j.ympev.2012.10.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 10/12/2012] [Accepted: 10/14/2012] [Indexed: 11/26/2022]
Abstract
Increasing pressure for water in the Australian arid zone is placing enormous stress on the diverse endemic communities inhabiting desert springs. Detailed information about the evolutionary processes occurring within and between individual endemic species will help to develop effective and biologically relevant management strategies this fragile ecosystem. To help determine conservation priorities, we documented the genetic structure of the endemic freshwater amphipod populations in springs fed by the Great Artesian Basin in central Australia. Phylogenetic and phylogeographic history and genetic diversity measures were examined using nuclear and mitochondrial DNA from approximately 500 chiltoniid amphipods across an entire group of springs. Pronounced genetic diversity was identified, demonstrating that levels of endemism have been grossly underestimated in these amphipods. Using the GMYC model, 13 genetically divergent lineages were recognized as Evolutionarily Significant Units (ESUs), all of which could be considered as separate species. The results show that due to the highly fragmented ecosystem, these taxa have highly restricted distributions. Many of the identified ESUs are endemic to a very small number of already degraded springs, with the rarest existing in single springs. Despite their extraordinarily small ranges, most ESUs showed relative demographic stability and high levels of genetic diversity, and genetic diversity was not directly linked to habitat extent. The relatively robust genetic health of ESUs does not preclude them from endangerment, as their limited distributions ensure they will be highly vulnerable to future water extraction.
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Affiliation(s)
- N P Murphy
- Department of Genetics, La Trobe University, Bundoora, Victoria 3086, Australia.
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