Arid
DOI10.1111/j.1365-2427.2011.02666.x
High gene flow and metapopulation dynamics detected for three species in a dryland river system
Huey, Joel A.1,2; Schmidt, Daniel J.1,2; Balcombe, Stephen R.1,2; Marshall, Jonathan C.3; Hughes, Jane M.1,2
通讯作者Huey, Joel A.
来源期刊FRESHWATER BIOLOGY
ISSN0046-5070
出版年2011
卷号56期号:11页码:2378-2390
英文摘要

1. The highly variable hydrology of dryland rivers has important implications for population dynamics in these systems. In western Queensland, fluctuations in sub-population size are likely to lead to local bottlenecks and extinctions, increasing the need for connectivity and gene flow to maintain population viability.


2. Using microsatellite markers, we explored evidence for this metapopulation structure in two species of freshwater fish (Maquaria ambigua and Tandanus tandanus) and one crustacean (Macrobrachium australiense) in a sub-catchment of the upper Murray-Darling Basin, Australia.


3. Overall, we found very weak genetic structure for all three species. Two species (M. ambigua and M. australiense) showed some significant genetic structure that did not correlate with geographic distance. However, decomposed pairwise regression analysis revealed evidence for intense genetic drift at the waterhole scale, suggesting that local bottlenecks are driving what little genetic structure does exist for these species.


4. The results identify the local impact of bottlenecks on genetic diversity, but highlight the importance of gene flow in maintaining population viability in these highly variable systems. As the impacts of bottlenecks are likely to be tempered by gene flow, it is suggested that the maintenance of connectivity is of paramount importance in this dryland system.


英文关键词decomposed pairwise regression analysis dryland river gene flow metapopulation microsatellites
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000296061400014
WOS关键词FRESH-WATER FISH ; POPULATION-STRUCTURE ; WESTERN QUEENSLAND ; ARID-ZONE ; EMPIRICAL-EVALUATION ; ASSEMBLAGE STRUCTURE ; MICROSATELLITE LOCI ; NEOSILURUS-HYRTLII ; AUSTRALIA ; PATTERNS
WOS类目Ecology ; Marine & Freshwater Biology
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/168153
作者单位1.Griffith Univ, EWater Cooperat Res Ctr, Brisbane, Qld 4111, Australia;
2.Griffith Univ, Australian Rivers Inst, Brisbane, Qld 4111, Australia;
3.Queensland Dept Environm & Resource Management, Brisbane, Qld, Australia
推荐引用方式
GB/T 7714
Huey, Joel A.,Schmidt, Daniel J.,Balcombe, Stephen R.,et al. High gene flow and metapopulation dynamics detected for three species in a dryland river system[J],2011,56(11):2378-2390.
APA Huey, Joel A.,Schmidt, Daniel J.,Balcombe, Stephen R.,Marshall, Jonathan C.,&Hughes, Jane M..(2011).High gene flow and metapopulation dynamics detected for three species in a dryland river system.FRESHWATER BIOLOGY,56(11),2378-2390.
MLA Huey, Joel A.,et al."High gene flow and metapopulation dynamics detected for three species in a dryland river system".FRESHWATER BIOLOGY 56.11(2011):2378-2390.
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