1
|
Bisang I, Ehrlén J, Hedenäs L. Life-history characteristics and historical factors are important to explain regional variation in reproductive traits and genetic diversity in perennial mosses. ANNALS OF BOTANY 2023; 132:29-42. [PMID: 36928083 PMCID: PMC10550275 DOI: 10.1093/aob/mcad045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND AND AIMS Plants have evolved an unrivalled diversity of reproductive strategies, including variation in the degree of sexual vs. clonal reproduction. This variation has important effects on the dynamics and genetic structure of populations. We examined the association between large-scale variation in reproductive patterns and intraspecific genetic diversity in two moss species where sex is manifested in the dominant haploid generation and sex expression is irregular. We predicted that in regions with more frequent realized sexual reproduction, populations should display less skewed sex ratios, should more often express sex and should have higher genetic diversity than in regions with largely clonal reproduction. METHODS We assessed reproductive status and phenotypic sex in the dioicous long-lived Drepanocladus trifarius and D. turgescens, in 248 and 438 samples across two regions in Scandinavia with frequent or rare realized sexual reproduction, respectively. In subsets of the samples, we analysed genetic diversity using nuclear and plastid sequence information and identified sex with a sex-specific molecular marker in non-reproductive samples. KEY RESULTS Contrary to our predictions, sex ratios did not differ between regions; genetic diversity did not differ in D. trifarius and it was higher in the region with rare sexual reproduction in D. turgescens. Supporting our predictions, relatively more samples expressed sex in D. trifarius in the region with frequent sexual reproduction. Overall, samples were mostly female. The degree of sex expression and genetic diversity differed between sexes. CONCLUSIONS Sex expression levels, regional sex ratios and genetic diversity were not directly associated with the regional frequency of realized sexual reproduction, and relationships and variation patterns differed between species. We conclude that a combination of species-specific life histories, such as longevity, overall degree of successful sexual reproduction and recruitment, and historical factors are important to explain this variation. Our data on haploid-dominated plants significantly complement plant reproductive biology.
Collapse
Affiliation(s)
- Irene Bisang
- Department of Botany, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden
| | - Johan Ehrlén
- Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Hedenäs
- Department of Botany, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden
| |
Collapse
|
2
|
Kaya S, Kabasakal B, Erdoğan A. Geographic Genetic Structure of Alectoris chukar in Türkiye: Post-LGM-Induced Hybridization and Human-Mediated Contaminations. BIOLOGY 2023; 12:biology12030401. [PMID: 36979093 PMCID: PMC10045126 DOI: 10.3390/biology12030401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 02/19/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023]
Abstract
Türkiye is considered an important evolutionary area for Chukar partridge (Alectoris chukar), since it is both a potential ancestral area and a diversification center for the species. Using 2 mitochondrial (Cty-b and D-loop) and 13 polymorphic microsatellite markers, we investigated the geographic genetic structure of A. chukar populations to determine how past climatic fluctuations and human activities have shaped the gene pool of this species in Türkiye. Our results indicate, firstly, that only A. chukar of the genus Alectoris is present in Türkiye (Anatolia and Thrace), with no natural or artificial gene flow from congenerics. Secondly, the geographic genetic structure of the species in Türkiye has been shaped by topographic heterogeneity, Pleistocene climatic fluctuations, and artificial transport by humans. Third, there appears to be three genetic clusters: Thracian, Eastern, and Western. Fourth, the post-LGM demographic expansion of the Eastern and Western populations has formed a hybrid zone in Central Anatolia (~8 kyBP). Fifth, the rate of China clade-B contamination in Türkiye is about 8% in mtDNA and about 12% in nuDNA, with the Southeastern Anatolian population having the highest contamination. Sixth, the Thracian population was the most genetically distinct, with the lowest genetic diversity and highest level of inbreeding and no China clad-B contamination. These results can contribute to the conservation regarding A. chukar populations, especially the Thracian population.
Collapse
Affiliation(s)
- Sarp Kaya
- First and Emergency Aid Programme, Department of Medical Services and Techniques, Vocational School of Burdur Health Services, Burdur Mehmet Akif Ersoy University, Burdur 15030, Turkey
| | - Bekir Kabasakal
- Department of Biology, Akdeniz University, Antalya 07058, Turkey
- Anesthesia Programme, Department of Medical Services and Techniques, Vocational School of Health Services, Antalya Bilim University, Antalya 07190, Turkey
- Correspondence:
| | - Ali Erdoğan
- Department of Biology, Akdeniz University, Antalya 07058, Turkey
| |
Collapse
|
3
|
Calleja JA, Domènech G, Sáez L, Lara F, Garilleti R, Albertos B. Extinction risk of threatened and non-threatened mosses: Reproductive and ecological patterns. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2022.e02254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
4
|
Phylogeography and Wolbachia Infections Reveal Postglacial Recolonization Routes of the Parthenogenetic Plant Louse Cacopsylla myrtilli (W. Wagner 1947), (Hemiptera, Psylloidea). J ZOOL SYST EVOL RES 2022. [DOI: 10.1155/2022/5458633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To reveal the phylogeographic pattern of the parthenogenetic psyllid Cacopsylla myrtilli (W. Wagner 1947) (Hemiptera, Psylloidea), we sequenced a 638 bp fragment of the mitochondrial COI gene from 962 individuals. These insects originated from 46 sampling sites, which cover a significant part of the northern Palearctic distribution range of the species. The sequence data revealed 40 haplotypes, with three main (H1, H2, and H3) and 37 derived ones. The main haplotypes H1 or H2 or both were present at all sampling sites. The star-like shape of the haplotype networks indicated recent population expansion. In most cases, the derived haplotypes were specific for each country, suggesting that the main haplotypes H1 and H2 are of refugial origin, and the derived haplotypes have emerged after the postglacial recolonization process. Based on the haplotype sequences, we suggest H3 to represent the ancestral haplotype from which H1 and H2 have evolved. We suggest that the main haplotype H3 together with its derived haplotypes represents bisexual C. myrtilli, which shows a limited distribution on both sides of the border between Finland and Russia in northern Fennoscandia. The genetic diversity was the highest in Sjoa in southern Norway and also high in the White Sea region in northwest Russia. Higher diversity in Sjoa was attributed to both earlier recolonizations compared to that of the White Sea region and the absence of Wolbachia infection. We suggest that these sites were colonized from different Pleistocene refugia, i.e., from western and eastern refugia, respectively. From the White Sea region, recolonization continued eastwards to Ural Mountains and westwards to Finland and further north to Kola Peninsula. From northern Finland, recolonization continued to Finnmark, Norway, and further to Sweden and finally reached a secondary contact zone with colonizers from Norway in Central Sweden. The Caucasus and Siberian/Manchurian refugial regions have played an important role in the origin of C. myrtilli populations in Siberia and the Russian Far East.
Collapse
|
5
|
Human-driven spreading and evolution of plants during the Holocene epoch: The pioneering works of Valery Taliev. Biosystems 2021; 210:104567. [PMID: 34743934 DOI: 10.1016/j.biosystems.2021.104567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 10/25/2021] [Indexed: 11/24/2022]
Abstract
Valery Taliev (1872-1932) was one of the first natural scientists who investigated the importance of anthropogenic factors in the evolution and geographic distribution of higher plants. He outlined major parameters of the origin and spreading of weed plants, of the flora of riverbanks, and proposed a direct role of man in changing the balance between forests and steppes. In his evolutionary views, Taliev emphasized the significance of parallel series of changes and of the directed evolution in several groups of higher plants as well as of geographic heterogeneity of plant species.
Collapse
|
6
|
Bippus AC, Rothwell GW, Stockey RA. Cynodontium luthii sp. nov.: a permineralized moss gametophyte from the Late Cretaceous of the North Slope of Alaska. AMERICAN JOURNAL OF BOTANY 2021; 108:495-504. [PMID: 33650114 DOI: 10.1002/ajb2.1617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 10/22/2020] [Indexed: 06/12/2023]
Abstract
PREMISE Mosses are a major component of Arctic vegetation today, with >500 species known to date. However, the origins of the Arctic moss flora are poorly documented in the fossil record, especially prior to the Pliocene. Here, we present the first anatomically preserved pre-Cenozoic Arctic moss and discuss how the unique biology of bryophytes has facilitated their success in polar environments over geologic time. METHODS A permineralized fossil moss gametophyte within a block of Late Cretaceous terrestrial limestone, collected along the Colville River on the North Slope of Alaska, was studied in serial sections prepared using the cellulose acetate peel technique. RESULTS The moss gametophyte is branched and has leaves with a broad base, narrow blade, and excurrent costa. We describe this fossil as Cynodontium luthii sp. nov., an extinct species of a genus that is known from the High Arctic today. Cynodontium luthii is the oldest evidence of the family Rhabdoweisiaceae (by ≥18 Ma) and reveals that genera of haplolepideous mosses known in the extant Arctic flora also lived in high-latitude temperate deciduous forests during the Late Cretaceous. CONCLUSIONS The occurrence of C. luthii in Cretaceous sediments, together with a rich Pliocene-to-Holocene fossil record of extant moss genera in the High Arctic, suggests that some moss lineages have exploited their poikilohydric, cold- and desiccation-tolerant physiology to live in the region when it experienced both temperate and freezing climates.
Collapse
Affiliation(s)
- Alexander C Bippus
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, 97331, USA
| | - Gar W Rothwell
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, 97331, USA
- Department of Environmental and Plant Biology, Ohio University, Athens, Ohio, 45701, USA
| | - Ruth A Stockey
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, 97331, USA
| |
Collapse
|
7
|
Alonso-García M, Villarreal A. JC, McFarland K, Goffinet B. Population Genomics and Phylogeography of a Clonal Bryophyte With Spatially Separated Sexes and Extreme Sex Ratios. FRONTIERS IN PLANT SCIENCE 2020; 11:495. [PMID: 32457772 PMCID: PMC7226906 DOI: 10.3389/fpls.2020.00495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
The southern Appalachian (SA) is one of the most biodiversity-rich areas in North America and has been considered a refugium for many disjunct plant species, from the last glacial period to the present. Our study focuses on the SA clonal hornwort, Nothoceros aenigmaticus J. C. Villarreal & K. D. McFarland. This hornwort was described from North Carolina and is widespread in the SA, growing on rocks near or submerged in streams in six and one watersheds of the Tennessee (TR) and Alabama (AR) Rivers, respectively. Males and female populations occur in different watersheds, except in the Little Tennessee (TN) River where an isolated male population exists ca. 48 km upstream from the female populations. The sex ratio of 1:0 seems extreme in each population. In this study, we use nuclear and organellar microsatellites from 250 individuals from six watersheds (seven populations) in the SA region and two populations from Mexico (23 individuals). We, then, selected 86 individuals from seven populations and used genotyping by sequencing to sample over 600 bi-allelic markers. Our results suggest that the SA N. aenigmaticus and Mexican plants are a nested within a clade of sexual tropical populations. In the US populations, we confirm an extreme sex ratio and only contiguous US watersheds share genotypes. The phylogenetic analysis of SNP data resolves four clusters: Mexican populations, male plants (Little Pigeon and Pigeon river watersheds) and two clusters of female plants; one from the Little Tennessee and Hiwassee Rivers (TR) and the other from the Ocoee (TR) and Coosa (AR) Rivers. All clusters are highly differentiated (Fst values over 0.9). In addition, our individual assignment analyses and PCAs reflect the phylogenetic results grouping the SA samples in three clades and recovering males and female plants with high genetic differentiation (Fst values between 0.5 and 0.9 using microsatellites and bi-allelic markers). Our results point to Pleistocene events shaping the biogeographical pattern seen in US populations. The extreme sex ratio reflects isolation and highlights the high vulnerability of the populations in the SA.
Collapse
Affiliation(s)
| | - Juan Carlos Villarreal A.
- Département de Biologie, Université Laval, Quebec City, QC, Canada
- Smithsonian Tropical Research Institute, Ancón, Panama
| | - Kenneth McFarland
- Department of Ecology and Evolutionary Biology, The University of Tennessee, Knoxville, TN, United States
| | - Bernard Goffinet
- Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT, United States
| |
Collapse
|
8
|
Mattingsdal M, Jorde PE, Knutsen H, Jentoft S, Stenseth NC, Sodeland M, Robalo JI, Hansen MM, André C, Blanco Gonzalez E. Demographic history has shaped the strongly differentiated corkwing wrasse populations in Northern Europe. Mol Ecol 2019; 29:160-171. [DOI: 10.1111/mec.15310] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 11/06/2019] [Accepted: 11/13/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Morten Mattingsdal
- Department of Natural Sciences Centre for Coastal Research University of Agder Kristiansand Norway
| | | | - Halvor Knutsen
- Department of Natural Sciences Centre for Coastal Research University of Agder Kristiansand Norway
- Institute of Marine Research Flødevigen Norway
| | - Sissel Jentoft
- Department of Biosciences Centre for Ecological and Evolutionary Synthesis University of Oslo Oslo Norway
| | - Nils Christian Stenseth
- Department of Natural Sciences Centre for Coastal Research University of Agder Kristiansand Norway
- Department of Biosciences Centre for Ecological and Evolutionary Synthesis University of Oslo Oslo Norway
| | - Marte Sodeland
- Department of Natural Sciences Centre for Coastal Research University of Agder Kristiansand Norway
| | - Joana I. Robalo
- Marine and Environmental Sciences Centre ISPA Instituto Universitário de Ciências Psicológicas, Sociais e da Vida Lisboa Portugal
| | | | - Carl André
- Department of Marine Sciences‐Tjärnö Göteborg University Strömstad Sweden
| | - Enrique Blanco Gonzalez
- Department of Natural Sciences Centre for Coastal Research University of Agder Kristiansand Norway
- Norwegian College of Fishery Science UiT The Arctic University of Norway Tromsø Norway
| |
Collapse
|
9
|
Schwarzer C, Joshi J. Ecotypic differentiation, hybridization and clonality facilitate the persistence of a cold-adapted sedge in European bogs. Biol J Linn Soc Lond 2019. [DOI: 10.1093/biolinnean/blz141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Recent research has shown that many cold-adapted species survived the last glacial maximum (LGM) in northern refugia. Whether this evolutionary history has had consequences for their genetic diversity and adaptive potential remains unknown. We sampled 14 populations of Carex limosa, a sedge specialized to bog ecosystems, along a latitudinal gradient from its Scandinavian core to the southern lowland range-margin in Germany. Using microsatellite and experimental common-garden data, we evaluated the impacts of global climate change along this gradient and assessed the conservation status of the southern marginal populations. Microsatellite data revealed two highly distinct genetic groups and hybrid individuals. In our common-garden experiment, the two groups showed divergent responses to increased nitrogen/phosphorus (N/P) availability, suggesting ecotypic differentiation. Each group formed genetically uniform populations at both northern and southern sampling areas. Mixed populations occurred throughout our sampling area, an area that was entirely glaciated during the LGM. The fragmented distribution implies allopatric divergence at geographically separated refugia that putatively differed in N/P availability. Molecular data and an observed low hybrid fecundity indicate the importance of clonal reproduction for hybrid populations. At the southern range-margin, however, all populations showed effects of clonality, lowered fecundity and low competitiveness, suggesting abiotic and biotic constraints to population persistence.
Collapse
Affiliation(s)
- Christian Schwarzer
- University of Potsdam, Biodiversity Research/Systematic Botany, Maulbeerallee 1, 14469 Potsdam, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Altensteinstr. 6, 14195 Berlin, Germany
| | - Jasmin Joshi
- University of Potsdam, Biodiversity Research/Systematic Botany, Maulbeerallee 1, 14469 Potsdam, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Altensteinstr. 6, 14195 Berlin, Germany
- Hochschule für Technik HSR Rapperswil, Institute for Landscape and Open Space, Oberseestrasse 10, 8640 Rapperswil, Switzerland
| |
Collapse
|
10
|
Ledent A, Désamoré A, Laenen B, Mardulyn P, McDaniel SF, Zanatta F, Patiño J, Vanderpoorten A. No borders during the post-glacial assembly of European bryophytes. Ecol Lett 2019; 22:973-986. [PMID: 30900805 DOI: 10.1111/ele.13254] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/11/2018] [Accepted: 02/24/2019] [Indexed: 11/28/2022]
Abstract
Climatic fluctuations during the Last Glacial Maximum (LGM) exerted a profound influence on biodiversity patterns, but their impact on bryophytes, the second most diverse group of land plants, has been poorly documented. Approximate Bayesian computations based on coalescent simulations showed that the post-glacial assembly of European bryophytes involves a complex history from multiple sources. The contribution of allochthonous migrants was 95-100% of expanding populations in about half of the 15 investigated species, which is consistent with the globally balanced genetic diversities and extremely low divergence observed among biogeographical regions. Such a substantial contribution of allochthonous migrants in the post-glacial assembly of Europe is unparalleled in other plants and animals. The limited role of northern micro-refugia, which was unexpected based on bryophyte life-history traits, and of southern refugia, is consistent with recent palaeontological evidence that LGM climates in Eurasia were much colder and drier than what palaeoclimatic models predict.
Collapse
Affiliation(s)
- A Ledent
- Institute of Botany, University of Liege, Sart Tilman, 4000, Liege, Belgium
| | - A Désamoré
- Department of Ecology, Environment, and Plant Sciences, Science for Life Laboratory, Stockholm University, Stockholm, Sweden
| | - B Laenen
- Department of Ecology, Environment, and Plant Sciences, Science for Life Laboratory, Stockholm University, Stockholm, Sweden
| | - P Mardulyn
- Evolutionary Biology & Ecology, Université Libre de Bruxelles, 1050, Brussels, Belgium
| | - S F McDaniel
- Biology Department, University of Florida, Gainesville, FL, 32611, USA
| | - F Zanatta
- Institute of Botany, University of Liege, Sart Tilman, 4000, Liege, Belgium
| | - J Patiño
- Plant Conservation and Biogeography Group, Departamento de Botánica, Ecología y Fisiología Vegetal, Universidad de La Laguna, 38071, La Laguna, Spain.,Island Ecology and Evolution Research Group, Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), 38071, La Laguna, Spain
| | - A Vanderpoorten
- Institute of Botany, University of Liege, Sart Tilman, 4000, Liege, Belgium
| |
Collapse
|
11
|
Désamoré A, Patiño J, Mardulyn P, Mcdaniel SF, Zanatta F, Laenen B, Vanderpoorten A. High migration rates shape the postglacial history of amphi-Atlantic bryophytes. Mol Ecol 2016; 25:5568-5584. [PMID: 27661065 DOI: 10.1111/mec.13839] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 08/29/2016] [Accepted: 08/31/2016] [Indexed: 11/28/2022]
Abstract
Paleontological evidence and current patterns of angiosperm species richness suggest that European biota experienced more severe bottlenecks than North American ones during the last glacial maximum. How well this pattern fits other plant species is less clear. Bryophytes offer a unique opportunity to contrast the impact of the last glacial maximum in North America and Europe because about 60% of the European bryoflora is shared with North America. Here, we use population genetic analyses based on approximate Bayesian computation on eight amphi-Atlantic species to test the hypothesis that North American populations were less impacted by the last glacial maximum, exhibiting higher levels of genetic diversity than European ones and ultimately serving as a refugium for the postglacial recolonization of Europe. In contrast with this hypothesis, the best-fit demographic model involved similar patterns of population size contractions, comparable levels of genetic diversity and balanced migration rates between European and North American populations. Our results thus suggest that bryophytes have experienced comparable demographic glacial histories on both sides of the Atlantic. Although a weak, but significant genetic structure was systematically recovered between European and North American populations, evidence for migration from and towards both continents suggests that amphi-Atlantic bryophyte population may function as a metapopulation network. Reconstructing the biogeographic history of either North American or European bryophyte populations therefore requires a large, trans-Atlantic geographic framework.
Collapse
Affiliation(s)
- Aurélie Désamoré
- Institute of Botany, University of Liège, B22 Sart Tilman, Liège, Belgium. .,Department of Zoology, Swedish Museum of Natural History, Box 50007, SE-104 05, Stockholm, Sweden.
| | - Jairo Patiño
- Institute of Botany, University of Liège, B22 Sart Tilman, Liège, Belgium.,Island Ecology and Evolution Research Group, Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Tenerife, Canary Islands, 38206, Spain.,Centre for Ecology, Evolution and Environmental Changes and Platform for Enhancing Ecological Research & Sustainability, Universidade dos Açores, 9700-042, Angra do Heroísmo, Terceira, Açores, Portugal
| | - Patrick Mardulyn
- Department of Evolutionary Biology and Ecology, Université libre de Bruxelles, Campus du Solbosch, Avenue F.D. Roosevelt 50, 1050, Bruxelles, Belgium
| | - Stuart F Mcdaniel
- Department of Biology, University of Florida, Box 118525, Gainesville, FL, 32611-8525, USA
| | - Florian Zanatta
- Institute of Botany, University of Liège, B22 Sart Tilman, Liège, Belgium
| | - Benjamin Laenen
- Institute of Botany, University of Liège, B22 Sart Tilman, Liège, Belgium.,SciLifeLab Stockholm, Department of Ecology, Environment and Plant Sciences, Stockholm University, Tomtebodav. 23a, 171 21, Solna, Stockholm, Sweden
| | - Alain Vanderpoorten
- Institute of Botany, University of Liège, B22 Sart Tilman, Liège, Belgium.,Island Ecology and Evolution Research Group, Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Tenerife, Canary Islands, 38206, Spain
| |
Collapse
|
12
|
Norhazrina N, Vanderpoorten A, Hedenäs L, Patiño J. What are the evolutionary mechanisms explaining the similar species richness patterns in tropical mosses? Insights from the phylogeny of the pantropical genus Pelekium. Mol Phylogenet Evol 2016; 105:139-145. [PMID: 27530707 DOI: 10.1016/j.ympev.2016.08.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 08/02/2016] [Accepted: 08/12/2016] [Indexed: 11/25/2022]
Abstract
As opposed to angiosperms, moss species richness is similar among tropical regions of the world, in line with the hypothesis that tropical bryophytes are extremely good dispersers. Here, we reconstructed the phylogeny of the pantropical moss genus Pelekium to test the hypothesis that high migration rates erase any difference in species richness among tropical regions. In contrast with this hypothesis, several species considered to have a pantropical range were resolved as a complex of species with a strong geographic structure. Consequently, a significant phylogeographical signal was found in the data, evidencing that cladogenetic diversification within regions takes place at a faster rate than intercontinental migration. The shape of the Pelekium phylogeny, along with the selection of a constant-rate model of diversification among species in the genus, suggests, however, that the cladogenetic speciation patterns observed in Pelekium are not comparable to some of the spectacular examples of tropical radiations reported in angiosperms. Rather, the results presented here point to the constant accumulation of diversity through time in Pelekium. This, combined with evidence for long-distance dispersal limitations in the genus, suggests that the similar patterns of species richness among tropical areas are better explained in terms of comparable rates of diversification across tropical regions than by the homogenization of species richness by recurrent migrations.
Collapse
Affiliation(s)
- Nik Norhazrina
- University of Liege, Institute of Botany, B22 Sart Tilman, Liege, Belgium; School of Environmental and Natural Resource Sciences, Faculty of Sciences, National University of Malaysia, 43600 Bangi, Selangor, Malaysia
| | | | - Lars Hedenäs
- Department of Botany, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden
| | - Jairo Patiño
- Island Ecology and Evolution Research Group, Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Laguna, Tenerife, Canary Islands, 38206, Spain
| |
Collapse
|
13
|
Hassel K, Johnsen JI, Jordal JB, Knutsen A. Porella obtusata: distribution, ecology and threats at the west coast of Norway, the northern fringe of its European distribution. LINDBERGIA 2015. [DOI: 10.25227/linbg.01068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Kristian Hassel
- K. Hassel , Univ. Museum, The Natural History Dept, Norwegian Univ. of Science and Technology, NO-7491 Trondheim, Norway
| | - John Inge Johnsen
- J. I. Johnsen, Fylkesmannen i Rogaland, Box 59, NO-4001 Stavanger, Norway
| | | | | |
Collapse
|