Mario Ernst, Daniel M Portik, Gabriel H Segniagbeto, Caleb Ofori-Boateng, Joseph Doumbia, Johannes Penner, N'Goran G Kouamé, Matthew K Fujita, Adam D Leaché, Mozes P K Blom, Mark-Oliver Rödel
{"title":"西非雨林青蛙的比较系统地理学揭示了避难所动态的区域差异。","authors":"Mario Ernst, Daniel M Portik, Gabriel H Segniagbeto, Caleb Ofori-Boateng, Joseph Doumbia, Johannes Penner, N'Goran G Kouamé, Matthew K Fujita, Adam D Leaché, Mozes P K Blom, Mark-Oliver Rödel","doi":"10.1111/mec.70043","DOIUrl":null,"url":null,"abstract":"<p><p>Understanding how species responded to climatic change in the past can help predict the long-term implications of contemporary climate change. The Upper Guinean rainforests of West Africa are a global biodiversity hotspot, and it is well documented that climatic fluctuations in the Pleistocene drove the expansion and contraction of rainforest cover in this region. West African slippery frogs, genus Conraua, are rainforest specialists and present an excellent opportunity to study the effects of climate-driven landscape changes on contemporary phylogeographic patterns and population dynamics. They exclusively inhabit rainforest streams and show little morphological or ecological disparity. We generated a population-level dataset of genome-wide restriction site-associated DNA (RAD) loci for four species spread across Upper Guinea. The observed phylogeographic structure is consistent with previously postulated macro- and micro-refugia. Building on these results, we used demographic modelling to trace demographic trends over time and infer population connectivity patterns. Overall, populations in topographically complex regions, like the Fouta Djallon, showed signatures of long-term local persistence and milder changes in population size. In contrast, we found more dynamic histories of contraction and expansion in the main Upper Guinean rainforest block. Our findings provide insights into regional biodiversity patterns and show large variation in population responses to climatic fluctuations. This suggests that local environmental factors have played a key role in shaping population dynamics. Such insights are particularly relevant in relatively understudied biodiversity hotspots, such as the Upper Guinean rainforests of West Africa. Our results have implications for conservation management and prioritisation at the species, site, and ecosystem level.</p>","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e70043"},"PeriodicalIF":3.9000,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Comparative Phylogeography of West African Rainforest Frogs Reveals Regional Variation in Refugia Dynamics.\",\"authors\":\"Mario Ernst, Daniel M Portik, Gabriel H Segniagbeto, Caleb Ofori-Boateng, Joseph Doumbia, Johannes Penner, N'Goran G Kouamé, Matthew K Fujita, Adam D Leaché, Mozes P K Blom, Mark-Oliver Rödel\",\"doi\":\"10.1111/mec.70043\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Understanding how species responded to climatic change in the past can help predict the long-term implications of contemporary climate change. The Upper Guinean rainforests of West Africa are a global biodiversity hotspot, and it is well documented that climatic fluctuations in the Pleistocene drove the expansion and contraction of rainforest cover in this region. West African slippery frogs, genus Conraua, are rainforest specialists and present an excellent opportunity to study the effects of climate-driven landscape changes on contemporary phylogeographic patterns and population dynamics. They exclusively inhabit rainforest streams and show little morphological or ecological disparity. We generated a population-level dataset of genome-wide restriction site-associated DNA (RAD) loci for four species spread across Upper Guinea. The observed phylogeographic structure is consistent with previously postulated macro- and micro-refugia. Building on these results, we used demographic modelling to trace demographic trends over time and infer population connectivity patterns. Overall, populations in topographically complex regions, like the Fouta Djallon, showed signatures of long-term local persistence and milder changes in population size. In contrast, we found more dynamic histories of contraction and expansion in the main Upper Guinean rainforest block. Our findings provide insights into regional biodiversity patterns and show large variation in population responses to climatic fluctuations. This suggests that local environmental factors have played a key role in shaping population dynamics. Such insights are particularly relevant in relatively understudied biodiversity hotspots, such as the Upper Guinean rainforests of West Africa. 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Comparative Phylogeography of West African Rainforest Frogs Reveals Regional Variation in Refugia Dynamics.
Understanding how species responded to climatic change in the past can help predict the long-term implications of contemporary climate change. The Upper Guinean rainforests of West Africa are a global biodiversity hotspot, and it is well documented that climatic fluctuations in the Pleistocene drove the expansion and contraction of rainforest cover in this region. West African slippery frogs, genus Conraua, are rainforest specialists and present an excellent opportunity to study the effects of climate-driven landscape changes on contemporary phylogeographic patterns and population dynamics. They exclusively inhabit rainforest streams and show little morphological or ecological disparity. We generated a population-level dataset of genome-wide restriction site-associated DNA (RAD) loci for four species spread across Upper Guinea. The observed phylogeographic structure is consistent with previously postulated macro- and micro-refugia. Building on these results, we used demographic modelling to trace demographic trends over time and infer population connectivity patterns. Overall, populations in topographically complex regions, like the Fouta Djallon, showed signatures of long-term local persistence and milder changes in population size. In contrast, we found more dynamic histories of contraction and expansion in the main Upper Guinean rainforest block. Our findings provide insights into regional biodiversity patterns and show large variation in population responses to climatic fluctuations. This suggests that local environmental factors have played a key role in shaping population dynamics. Such insights are particularly relevant in relatively understudied biodiversity hotspots, such as the Upper Guinean rainforests of West Africa. Our results have implications for conservation management and prioritisation at the species, site, and ecosystem level.
期刊介绍:
Molecular Ecology publishes papers that utilize molecular genetic techniques to address consequential questions in ecology, evolution, behaviour and conservation. Studies may employ neutral markers for inference about ecological and evolutionary processes or examine ecologically important genes and their products directly. We discourage papers that are primarily descriptive and are relevant only to the taxon being studied. Papers reporting on molecular marker development, molecular diagnostics, barcoding, or DNA taxonomy, or technical methods should be re-directed to our sister journal, Molecular Ecology Resources. Likewise, papers with a strongly applied focus should be submitted to Evolutionary Applications. Research areas of interest to Molecular Ecology include:
* population structure and phylogeography
* reproductive strategies
* relatedness and kin selection
* sex allocation
* population genetic theory
* analytical methods development
* conservation genetics
* speciation genetics
* microbial biodiversity
* evolutionary dynamics of QTLs
* ecological interactions
* molecular adaptation and environmental genomics
* impact of genetically modified organisms