Disruption of historical patterns of isolation by distance in coastal steelhead

Pearse, Devon E.; Martínez, Edith Martínez; Garza, John Carlos

doi:10.1007/s10592-010-0175-8

Cited by 33 publications

(53 citation statements)

References 46 publications

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“…Isolation by distance is not an unusual pattern in freshwater systems (Pearse et al . ; Petrou et al . ), especially for species exhibiting low vagility as G. platei (Piedra et al .…”

Section: Discussionmentioning

confidence: 99%

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Echoes of a distant time: effects of historical processes on contemporary genetic patterns in Galaxias platei in Patagonia

2015

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Interpreting the genetic structure of a metapopulation as the outcome of gene flow over a variety of timescales is essential for the proper understanding of how changes in landscape affect biological connectivity. Here we contrast historical and contemporary connectivity in two metapopulations of the freshwater fish Galaxias platei in northern and southernmost Patagonia where paleolakes existed during the Holocene and Pleistocene, respectively. Contemporary gene flow was mostly high and asymmetrical in the northern system while extremely reduced in the southernmost system. Historical migration patterns were high and symmetric in the northern system and high and largely asymmetric in the southern system. Both systems showed a moderate structure with a clear pattern of isolation by distance (IBD). Effective population sizes were smaller in populations with low contemporary gene flow. An approximate Bayesian computation (ABC) approach suggests a late Holocene colonization of the lakes in the northern system and recent divergence of the populations from refugial populations from east and west of the Andes. For the southern system, the ABC approach reveals that some of the extant G. platei populations most likely derive from an ancestral population inhabiting a large Pleistocene paleolake while the rest derive from a higher-altitude lake. Our results suggest that neither historical nor contemporary processes individually fully explain the observed structure and geneflow patterns and both are necessary for a proper understanding of the factors that affect diversity and its distribution. Our study highlights the importance of a temporal perspective on connectivity to analyse the diversity of spatially complex metapopulations.

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“…Isolation by distance is not an unusual pattern in freshwater systems (Pearse et al . ; Petrou et al . ), especially for species exhibiting low vagility as G. platei (Piedra et al .…”

Section: Discussionmentioning

confidence: 99%

“…History matters and processes taking place at disparate timescales need to be considered to avoid the over‐ or underestimation of the relative importance of the factors responsible for the generation and maintenance of genetic diversity (Pearse et al . ; He et al . ; Hansen et al .…”

Section: Discussionmentioning

confidence: 99%

Echoes of a distant time: effects of historical processes on contemporary genetic patterns in Galaxias platei in Patagonia

2015

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“…For example, Pearse et al . () suggested that migratory routes have been interrupted in steelhead trout, Oncorhynchus mykiss , from comparisons of modern‐caught and historical specimens.…”

Section: Genetics and Genomicsmentioning

confidence: 99%

Natural history collections as windows on evolutionary processes

et al. 2016

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Natural history collections provide an immense record of biodiversity on Earth. These repositories have traditionally been used to address fundamental questions in biogeography, systematics, and conservation. However, they also hold the potential for studying evolution directly. While some of the best direct observations of evolution have come from long-term field studies or from experimental studies in the lab, natural history collections are providing new insights into evolutionary change in natural populations. By comparing phenotypic and genotypic changes in populations through time, natural history collections provide a window into evolutionary processes. Recent studies utilizing this approach have revealed some dramatic instances of phenotypic change over short time scales in response to presumably strong selective pressures. In some instances evolutionary change can be paired with environmental change, providing a context for potential selective forces. Moreover, in a few cases, the genetic basis of phenotypic change is well understood, allowing for insight into adaptive change at multiple levels. These kinds of studies open the door to a wide range of previously intractable questions by enabling the study of evolution through time, analogous to experimental studies in the laboratory, but amenable to a diversity of species over longer timescales in natural populations.

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“…see Cambray, 2003). Native rainbow trout and other congeneric trout can suffer significant loss of genetic diversity and integrity due to hybridization with introduced hatchery populations (Pearse et al, 2010;Simmons et al, 2010;Finger et al, 2011). Such accounts are reported throughout the entire range of North American native trout.…”

Section: Worldwide Overview Of Negative Impacts Of Rainbow Trout On Nmentioning

confidence: 99%

Rainbow Trout in Europe: Introduction, Naturalization, and Impacts

Stanković

Crivellì

Snoj

2015

Reviews in Fisheries Science & Aquaculture

103

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The rainbow trout (Oncorhynchus mykiss) is probably the most widely introduced fish species in the world. Since the first translocation outside of the range of its natural distribution, the species has been introduced into at least 99 countries and has established reproducing populations in many different parts of the world. The present review aims to synthesize the existing information on these translocations, with special emphasis on self-sustaining populations in Europe, where continuous introductions have in general not led to naturalization. Our survey produced a list of more than 130 confirmed or potential self-sustaining populations across 16 European countries. The highest abundance of such populations was observed in the Alpine foothills of central Europe where naturalization is not limited to modified waters less suitable for native salmonids but also occurs commonly in pristine and near-natural waters. There is no consensus on the reasons for the absence of self-sustaining populations of rainbow trout across much of Europe, partly because knowledge of the mechanisms involved is limited, while the data collected here shed new light on the invasion biology of the species.

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Disruption of historical patterns of isolation by distance in coastal steelhead

Cited by 33 publications

References 46 publications

Echoes of a distant time: effects of historical processes on contemporary genetic patterns in Galaxias platei in Patagonia

Echoes of a distant time: effects of historical processes on contemporary genetic patterns in Galaxias platei in Patagonia

Natural history collections as windows on evolutionary processes

Rainbow Trout in Europe: Introduction, Naturalization, and Impacts

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