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Selected Works

Ecology and Evolutionary Biology

Dispersal

Articles 1 - 9 of 9

Full-Text Articles in Life Sciences

Rapid Range Expansion Of The Brazilian Free-Tailed Bat In The Southeastern United States, 2008-2016, Gary F. Mccracken, Riley F. Bernard, Melquisidec Gamba-Rios, Randy Wolfe, Jennifer J. Krauel, Devin N. Jones, Amy L. Russell, Veronica A. Brown Apr 2018

Rapid Range Expansion Of The Brazilian Free-Tailed Bat In The Southeastern United States, 2008-2016, Gary F. Mccracken, Riley F. Bernard, Melquisidec Gamba-Rios, Randy Wolfe, Jennifer J. Krauel, Devin N. Jones, Amy L. Russell, Veronica A. Brown

Amy L. Russell

Brazilian free-tailed bats (Tadarida brasiliensis) are one of the most widely distributed bat species in the Americas, often engaging in rapid, long-distance dispersals, Here, we document that, since ca. 2007, these bats have expanded their range into western North Carolina, eastern Tennessee, and Virginia. Reports from wildlife control professionals, wildlife rehabilitators, regional submissions of bats for rabies testing, acoustic monitoring, and the presence of T. brasiliensis in buildings and bat houses indicate that these bats are now established in year-round colonies in areas previously thought outside their range limits. The geographic distributions of many organisms are currently shifting …

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Competition And Propagule Density Affect Sexual And Clonal Propagation Of A Weed, Daniel Z. Atwater, Wonjae Kim, Daniel R. Tekiela, Jacob N. Barney Feb 2017

Competition And Propagule Density Affect Sexual And Clonal Propagation Of A Weed, Daniel Z. Atwater, Wonjae Kim, Daniel R. Tekiela, Jacob N. Barney

Wonjae Kim

Many introduced species are capable of both sexual and vegetative reproduction. Our understanding of the ecology of such species depends on the trade-offs between vegetative and sexual reproduction and the ecological conditions that favor both modes of reproduction and how those factors influence the population ecology of introduced species. Here, we studied the efficacy of propagation via both seeds and rhizomes in Johnsongrass, a widespread invasive grass whose success is due to its prolific production of shattering seeds and rhizomes, the latter of which are readily dispersed by anthropogenic and natural processes. In a common garden in Virginia, we varied …

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Comparative Phylogeography Of Pteropus Samoensis And P. Tonganus (Pteropodidae: Chiroptera) In The South Pacific, Amy L. Russell, Veronica A. Brown, Ruth C. B. Utzurrum, Anne P. Brooke, Lisa A. Wolf, Gary F. Mccracken Nov 2016

Comparative Phylogeography Of Pteropus Samoensis And P. Tonganus (Pteropodidae: Chiroptera) In The South Pacific, Amy L. Russell, Veronica A. Brown, Ruth C. B. Utzurrum, Anne P. Brooke, Lisa A. Wolf, Gary F. Mccracken

Amy L. Russell

Pteropids are large, highly mobile bats that are distributed widely across islands of the Pacific and Indian Oceans, southern Asia, and Australia. Dispersal behaviors and colonization patterns of pteropid species among oceanic islands are poorly known. In the southern Pacific, Pteropus samoensis and P. tonganus have partially overlapping ranges, existing in sympatry on the Samoan and Fijian archipelagos. These species exhibit differences in morphology and roosting behavior, with P. samoensis being smaller and tending to roost solitarily or in small groups. Here, we use genetic data to explore whether these species also exhibit differences with regard to patterns of population …

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Spatial Capture–Recapture Models Allowing Markovian Transience Or Dispersal, J. Royle, Angela Fuller, Chris Sutherland Dec 2015

Spatial Capture–Recapture Models Allowing Markovian Transience Or Dispersal, J. Royle, Angela Fuller, Chris Sutherland

Chris Sutherland

Spatial capture–recapture (SCR) models are a
relatively recent development in quantitative ecology, and
they are becoming widely used to model density in studies
of animal populations using camera traps, DNA sampling
and other methods which produce spatially explicit individual
encounter information. One of the core assumptions
of SCR models is that individuals possess home ranges that
are spatially stationary during the sampling period. For
many species, this assumption is unlikely to be met and,
even for species that are typically territorial, individuals
may disperse or exhibit transience at some life stages. In
this paper we first conduct a simulation study …

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Genetic Structure Of Little Brown Bats (Myotis Lucifugus) Corresponds With Spread Of White-Nose Syndrome Among Hibernacula, Cassandra M. Miller-Butterworth, Maarten J. Vonhof, Joel Rosenstern, Greg G. Turner, Amy L. Russell Feb 2014

Genetic Structure Of Little Brown Bats (Myotis Lucifugus) Corresponds With Spread Of White-Nose Syndrome Among Hibernacula, Cassandra M. Miller-Butterworth, Maarten J. Vonhof, Joel Rosenstern, Greg G. Turner, Amy L. Russell

Amy L. Russell

Until recently, the little brown bat (Myotis lucifugus) was one of the most common bat species in North America. However, this species currently faces a significant threat from the emerging fungal disease white-nose syndrome (WNS). The aims of this study were to examine the population genetic structure of M. lucifugus hibernating colonies in Pennsylvania (PA) and West Virginia (WV), and to determine whether that population structure may have influenced the pattern of spread of WNS. Samples were obtained from 198 individuals from both uninfected and recently infected colonies located at the crest of the disease front. Both mitochondrial (636 bp …

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The Cumulative Effects Of Management On The Population Dynamics Of The Double-Crested Cormorant Phalacrocorax Auritus In The Great Lakes, Alban Guillaumet, Brian S. Dorr, Guiming Wang, Terry J. Doyle Jan 2014

The Cumulative Effects Of Management On The Population Dynamics Of The Double-Crested Cormorant Phalacrocorax Auritus In The Great Lakes, Alban Guillaumet, Brian S. Dorr, Guiming Wang, Terry J. Doyle

Brian S Dorr

Wildlife species have been subject to control efforts throughout human history due to real or alleged human–wildlife conflicts. The Double-crested Cormorant Phalacrocorax auritus in the interior of North America is no exception, with recent population growth leading to increased conflicts and consequently the development of many control programmes. These control programmes are usually conducted at local scales, often with little or no effort to assess their cumulative effects at the population level. We attempted the first comprehensive assessment of the cumulative effects of control at various spatio-temporal scales, focusing on 199 colonies of Double-crested Cormorant monitored during a 29-year period. …

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Dispersal Of Stable Flies (Diptera: Muscidae) From Larval Developmental Sites., David B. Taylor, Roger D. Moon, Jack B. Campbell, Dennis R. Berkebile, Philip J. Scholl, Alberto B. Broce, Jerome A. Hogsette Jan 2010

Dispersal Of Stable Flies (Diptera: Muscidae) From Larval Developmental Sites., David B. Taylor, Roger D. Moon, Jack B. Campbell, Dennis R. Berkebile, Philip J. Scholl, Alberto B. Broce, Jerome A. Hogsette

David B Taylor

Seven mark-recapture studies were conducted over 3 yr to assess dispersal of newly emerging adult stable flies, Stomoxys calcitrans L., from larval development sites in a mixed agricultural environment in northeastern Nebraska. Infested hay debris piles were marked by dusting their surfaces with fluorescent pigments, adults were captured with surrounding grids of Alsynite sticky traps, and specimens were dissected to determine feeding histories and reproductive age. Distances and directions of 3,889 marked specimens indicated males and females dispersed equally and in all directions. Midguts of males and females were equally likely to contain blood-meal remnants. Percentage with blood remnants and …

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Genetic Structure Of East Antarctic Populations Of The Moss Ceratodon Purpureus, L. J. Clarke, D. J. Ayre, Sharon A. Robinson Nov 2009

Genetic Structure Of East Antarctic Populations Of The Moss Ceratodon Purpureus, L. J. Clarke, D. J. Ayre, Sharon A. Robinson

Sharon Robinson

The capacity of the polar flora to adapt is of increasing concern given current and predicted environmental change in these regions. Previous genetic studies of Antarctic mosses have been of limited value due to a lack of variation in the markers or non-specificity of the methods used. We examined the power of five microsatellite loci developed for the cosmopolitan moss Ceratodon purpureus to detect genetically distinct clones and infer the distribution of clones within and among populations from the Windmill Islands, East Antarctica. Our microsatellite data suggest extraordinarily high levels of variation reported in RAPD studies were artificially elevated by …

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Barriers And Flow As Limiting Factors In The Spread Of An Invasive Crayfish (Procambarus Clarkii) In Southern California Streams, Jacob Kerby, Seth Riley, Lee Kats, Paul Wilson Jul 2005

Barriers And Flow As Limiting Factors In The Spread Of An Invasive Crayfish (Procambarus Clarkii) In Southern California Streams, Jacob Kerby, Seth Riley, Lee Kats, Paul Wilson

Lee Kats

Invasive crayfish are a major threat to stream ecosystems, yet research has seldom identified successful ways of preventing their spread. Thirty-two stream sections were surveyed during 2000 and 2001 in the Santa Monica Mountains of southern California to determine the distribution of the invasive crayfish Procambarus clarkii. Streams with large barriers (waterfalls, culverts) often did not have crayfish present upstream of barriers. A mark-recapture study indicated that P. clarkii moved both up and downstream between pools, but that barriers significantly reduced movement between pools. Seasonal high flow velocities likely increase passive movement downstream and reduce movement upstream. Results indicate that …

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