Geographical Variation in the Big Brown bat in the North-Central United States

Long, Charles A.; Severson, Robert

doi:10.2307/1378795

Cited by 4 publications

(4 citation statements)

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“…Diversifying natural selection across a large and highly variable geographic range combined with barriers to gene flow has been suggested as the basic explanation for variation in big brown bat morphology and the significant correlation of certain traits with climatic factors (Burnett 1983a,b). Although morphological intergradation between subspecies has long been recognized (Long & Severson 1969;Burnett 1983b;Hoffman & Genoways 2008), our results highlight the possibility of adaptive divergence despite a substantial level of ongoing gene flow. Under such conditions, genetic drift alone, which can be countered by levels of gene flow on the order of Nm = 1 per generation, is not likely to produce either genetic or phenotypic differences between populations, but selection still may be effective in producing divergence if m < s, where s is the coefficient of selection (Slatkin 1987).…”

Section: Comparison To Other Recent Studies and Evolutionary Implicatmentioning

confidence: 56%

A tale of two genomes: contrasting patterns of phylogeographic structure in a widely distributed bat

2010

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One of the most widely distributed bats in the New World, the big brown bat (Eptesicus fuscus) exhibits well-documented geographic variation in morphology and life history traits, suggesting the potential for significant phylogeographic structure as well as adaptive differentiation among populations. In a pattern broadly consistent with morphologically defined subspecies, we found deeply divergent mitochondrial lineages restricted to different geographic regions. In contrast, sequence data from two nuclear loci suggest a general lack of regional genetic structure except for peripheral populations in the Caribbean and Mexico/South America. Coalescent analyses suggest that the striking difference in population structure between genomes cannot be attributed solely to different rates of lineage sorting, but is likely due to male-mediated gene flow homogenizing nuclear genetic diversity across most of the continental range. Despite this ongoing gene flow, selection has apparently been effective in producing and maintaining adaptive differentiation among populations, while strong female site fidelity, maintained over the course of millions of years, has produced remarkably deep divergence among geographically isolated matrilines. Our results highlight the importance of evaluating multiple genetic markers for a more complete understanding of population structure and history.

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Section: Comparison To Other Recent Studies and Evolutionary Implicatmentioning

confidence: 56%

A tale of two genomes: contrasting patterns of phylogeographic structure in a widely distributed bat

2010

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“…Exactly where these 2 subspecies come in contact is the subject of debate. A number of studies place the zone of contact in the eastern third of the Dakotas and Nebraska, continuing southwestward into Kansas and Oklahoma (Long and Severson 1969, Hall 1981, Jones et al 1983. Other studies suggest that the western subspecies, E. f. pallidus, is absent from the southern plains states of Kansas and Oklahoma and that the contact zone is located in the western portions of Nebraska and the Dakotas (Allen 1933, Engels 1936, Burnett 1983a, Choate et al 1986, Caire et al 1989.…”

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confidence: 99%

Characterization of a Contact Zone between Two Subspecies of the Big Brown Bat (Eptesicus fuscus) in Nebraska

Hoffman¹,

Genoways²

2008

Western North American Naturalist

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“…Selected references: Barbour and Davis (1969), Goehring (1972), Gould (1971), Long and Severson (1969).…”

Section: Species Eptesicus Fuscus: Big Brown Batmentioning

confidence: 99%

Natural History of Oregon Coast Mammals

Maser¹,

Mate²,

Franklin³

et al. 1981

109

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Maser, Chris, Bruce R. Mate, Jerry F. Franklin, and C. T. Dyrness. 1981 The book presents detailed information on the biology, habitats, and life histories of the 96 species of mammals of the Oregon coast. Soils, geology, and vegetation are described and related to wildlife habitats for the 65 terrestrial and 31 marine species. The book is not simply an identification guide to the Oregon coast mammals but is a dynamic portrayal of their habits and habitats. Life histories are based on fieldwork and available literature. An extensive bibliography is included. Personal anecdotes of the authors provide entertaining reading. The book should be of use to students, educators, land-use planners, resource managers, wildlife biologists, and naturalists.Keywords: Natural history, mammals (marine), mammals (land), Oregon coast, wildlife habitat. ForewordIt is a privilege to write a foreword to Natural Hisfory of Oregon Coast Mammals. I have observed the production of this book since its inception and believe it has two qualities that especially recommend it: First, it is timely, attuned to the almost indescribable sense of frustrated urgency that environmental matters must be dealt with by a mixture of wisdom, information, and common sense that seems impossible to obtain. Second, this book is one of authority, by writers who are able to give the best and most accurate accounting of the ecosystems that make up the coastal region of Oregon. It can be looked on as a model for similar treatises, and in fact it contains much information that is applicable to other areas. Allow me to expand briefly on these two points.We are living in a schizophrenic time: There is need for wise use of our resources and there is the companion need for sensible conservation. As residents of the Pacific Northwest, a phenomenally satisfying part of the world, we see the requirement and the push to provide an ever-better life for more and more people. This may be called the "Development Syndrome." It is well known and self explanatory.At the same time we know the extreme preciousness of naturalness and nature, called by many terms and related to inner feelings. This may be termed simply and best as the "Concern for Nature Syndrome." This syndrome is difficult to describe for it is different in each person. It embodies emotional requirements of feelings and perceptions. It combines remembrances with objective appraisals and hopes for the future. It is concerned with a basic need for stability in a changing world, for places that are changeless from childhood memories through present experiences into plans for the future.As many writers have compellingly stated, wilderness (or varieties of wilderness as perceived by the individual) is the symbolic evidence of the concern for nature. We, each of us, have our own needs and our own interpretations, stated or not, as to how these needs may be manifested and fulfilled. Theodore Roosevelt wrote iii (Hunting Trips of a Ranchman, Century, 1885): "In the after years there shall come forever the memory ...

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Geographical Variation in the Big Brown bat in the North-Central United States

Cited by 4 publications

References 4 publications

A tale of two genomes: contrasting patterns of phylogeographic structure in a widely distributed bat

A tale of two genomes: contrasting patterns of phylogeographic structure in a widely distributed bat

Characterization of a Contact Zone between Two Subspecies of the Big Brown Bat (Eptesicus fuscus) in Nebraska

Natural History of Oregon Coast Mammals

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