Environmental selection and gene flow jointly determine the population genetic diversity and structure of Diaphanosoma dubium along a watershed elevation
Biodiversity of local communities has been found to generally decrease with elevation. However, the elevational patterns of intraspecific genetic diversity remain unclear, especially in passive dispersers and species with short life histories. In this study, we investigated the populations of a trop...
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Elsevier
2024-01-01
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| Series: | Global Ecology and Conservation |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2351989423004080 |
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| author | Jian Liao Shu Chen Ping Liu Diego Fontaneto Bo-Ping Han |
| author_facet | Jian Liao Shu Chen Ping Liu Diego Fontaneto Bo-Ping Han |
| author_sort | Jian Liao |
| collection | DOAJ |
| description | Biodiversity of local communities has been found to generally decrease with elevation. However, the elevational patterns of intraspecific genetic diversity remain unclear, especially in passive dispersers and species with short life histories. In this study, we investigated the populations of a tropical dominant Cladoceran, Diaphanosoma dubium, along elevation in the largest watershed of South China. The studied populations were grouped into four regional groups based on elevation and habitat connectivity. No significant elevation pattern was observed for mitochondrial genetic diversity, but nuclear diversity was influenced by habitat type. The haplotype network showed a radial pattern with a common haplotype at the centre, and many private haplotypes existed in each regional group. Four clusters of D. dubium populations were identified and exactly corresponding to the four investigated regions, indicating a strong spatial genetic structure. Weak but significant isolation by distance (IBD) supported the critical role of environmental selection with elevation. Precipitation significantly explained population genetic variation at the watershed scale. Bidirectional gene flow was a common pattern that occurred among the four regional groups. Our results highlight that habitat selection with gene flow plays an important role in shaping the genetic pattern of tropical freshwater Cladocera along an elevational gradient. |
| first_indexed | 2024-03-08T11:53:32Z |
| format | Article |
| id | doaj.art-9e6ed0eaae9e4acfbd077082e4cd8dac |
| institution | Directory Open Access Journal |
| issn | 2351-9894 |
| language | English |
| last_indexed | 2024-03-08T11:53:32Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
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| series | Global Ecology and Conservation |
| spelling | doaj.art-9e6ed0eaae9e4acfbd077082e4cd8dac2024-01-24T05:21:03ZengElsevierGlobal Ecology and Conservation2351-98942024-01-0149e02773Environmental selection and gene flow jointly determine the population genetic diversity and structure of Diaphanosoma dubium along a watershed elevationJian Liao0Shu Chen1Ping Liu2Diego Fontaneto3Bo-Ping Han4Department of Ecology, Institute of Hydrobiology, Jinan University, Guangzhou 510632, China; Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang 524025, ChinaDepartment of Ecology, Institute of Hydrobiology, Jinan University, Guangzhou 510632, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; Corresponding authors.National Research Council of Italy (CNR), Water Research Institute (IRSA), Molecular Ecology Group (MEG), Largo Tonolli 50, I-28922 Verbania Pallanza, ItalyDepartment of Ecology, Institute of Hydrobiology, Jinan University, Guangzhou 510632, China; Corresponding authors.Biodiversity of local communities has been found to generally decrease with elevation. However, the elevational patterns of intraspecific genetic diversity remain unclear, especially in passive dispersers and species with short life histories. In this study, we investigated the populations of a tropical dominant Cladoceran, Diaphanosoma dubium, along elevation in the largest watershed of South China. The studied populations were grouped into four regional groups based on elevation and habitat connectivity. No significant elevation pattern was observed for mitochondrial genetic diversity, but nuclear diversity was influenced by habitat type. The haplotype network showed a radial pattern with a common haplotype at the centre, and many private haplotypes existed in each regional group. Four clusters of D. dubium populations were identified and exactly corresponding to the four investigated regions, indicating a strong spatial genetic structure. Weak but significant isolation by distance (IBD) supported the critical role of environmental selection with elevation. Precipitation significantly explained population genetic variation at the watershed scale. Bidirectional gene flow was a common pattern that occurred among the four regional groups. Our results highlight that habitat selection with gene flow plays an important role in shaping the genetic pattern of tropical freshwater Cladocera along an elevational gradient.http://www.sciencedirect.com/science/article/pii/S2351989423004080Genetic variationEnvironmental gradientDispersalIBDTropics |
| spellingShingle | Jian Liao Shu Chen Ping Liu Diego Fontaneto Bo-Ping Han Environmental selection and gene flow jointly determine the population genetic diversity and structure of Diaphanosoma dubium along a watershed elevation Global Ecology and Conservation Genetic variation Environmental gradient Dispersal IBD Tropics |
| title | Environmental selection and gene flow jointly determine the population genetic diversity and structure of Diaphanosoma dubium along a watershed elevation |
| title_full | Environmental selection and gene flow jointly determine the population genetic diversity and structure of Diaphanosoma dubium along a watershed elevation |
| title_fullStr | Environmental selection and gene flow jointly determine the population genetic diversity and structure of Diaphanosoma dubium along a watershed elevation |
| title_full_unstemmed | Environmental selection and gene flow jointly determine the population genetic diversity and structure of Diaphanosoma dubium along a watershed elevation |
| title_short | Environmental selection and gene flow jointly determine the population genetic diversity and structure of Diaphanosoma dubium along a watershed elevation |
| title_sort | environmental selection and gene flow jointly determine the population genetic diversity and structure of diaphanosoma dubium along a watershed elevation |
| topic | Genetic variation Environmental gradient Dispersal IBD Tropics |
| url | http://www.sciencedirect.com/science/article/pii/S2351989423004080 |
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