Arid
DOI10.1007/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
ISSN0921-2973
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
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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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