Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10980-005-5221-4 |
Landscape attributes and life history variability shape genetic structure of trout populations in a stream network | |
Neville, Helen M.; Dunham, Jason B.; Peacock, Mary M. | |
通讯作者 | Neville, Helen M. |
来源期刊 | LANDSCAPE ECOLOGY
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ISSN | 0921-2973 |
出版年 | 2006 |
卷号 | 21期号:6页码:901-916 |
英文摘要 | Spatial and temporal landscape patterns have long been recognized to influence biological processes, but these processes often operate at scales that are difficult to study by conventional means. Inferences from genetic markers can overcome some of these limitations. We used a landscape genetics approach to test hypotheses concerning landscape processes influencing the demography of Lahontan cutthroat trout in a complex stream network in the Great Basin desert of the western US. Predictions were tested with population- and individual-based analyses of microsatellite DNA variation, reflecting patterns of dispersal, population stability, and local effective population sizes. Complementary genetic inferences suggested samples from migratory corridors housed a mixture of fish from tributaries, as predicted based on assumed migratory life histories in those habitats. Also as predicted, populations presumed to have greater proportions of migratory fish or from physically connected, large, or high quality habitats had higher genetic variability and reduced genetic differentiation from other populations. Populations thought to contain largely non-migratory individuals generally showed the opposite pattern, suggesting behavioral isolation. Estimated effective sizes were small, and we identified significant and severe genetic bottlenecks in several populations that were isolated, recently founded, or that inhabit streams that desiccate frequently. Overall, this work suggested that Lahontan cutthroat trout populations in stream networks are affected by a combination of landscape and metapopulation processes. Results also demonstrated that genetic patterns can reveal unexpected processes, even within a system that is well studied from a conventional ecological perspective. |
英文关键词 | bottlenecks connectivity cutthroat trout dispersal effective population size founder effects habitat structure landscape genetics metapopulation Oncorhynchus clarkii |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000239484200010 |
WOS关键词 | LAHONTAN CUTTHROAT TROUT ; MAXIMUM-LIKELIHOOD-ESTIMATION ; TRUTTA L. POPULATIONS ; SALMON SALMO-SALAR ; MICROSATELLITE LOCI ; CONSERVATION IMPLICATIONS ; METAPOPULATION DYNAMICS ; COALESCENT APPROACH ; TEMPORAL-CHANGES ; MIGRATION |
WOS类目 | Ecology ; Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography ; Geology |
来源机构 | United States Geological Survey |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/152436 |
作者单位 | (1)Univ Nevada, Dept Biol 314, Reno, NV 89557 USA;(2)Rocky Mt Res Stn, Boise, ID 83702 USA;(3)USGS FRESC Corvallis Res Grp, Corvallis, OR 97331 USA |
推荐引用方式 GB/T 7714 | Neville, Helen M.,Dunham, Jason B.,Peacock, Mary M.. Landscape attributes and life history variability shape genetic structure of trout populations in a stream network[J]. United States Geological Survey,2006,21(6):901-916. |
APA | Neville, Helen M.,Dunham, Jason B.,&Peacock, Mary M..(2006).Landscape attributes and life history variability shape genetic structure of trout populations in a stream network.LANDSCAPE ECOLOGY,21(6),901-916. |
MLA | Neville, Helen M.,et al."Landscape attributes and life history variability shape genetic structure of trout populations in a stream network".LANDSCAPE ECOLOGY 21.6(2006):901-916. |
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