We compared habitat features of Golden-winged Warbler (Vermivora chrysoptera) territories in the ... more We compared habitat features of Golden-winged Warbler (Vermivora chrysoptera) territories in the presence and absence of the Blue-winged Warbler (V. cyanoptera) on reclaimed coal mines in southeastern Kentucky, USA. Our objective was to determine whether there are ...
Chapter 5 Returning Elk to Appalachia: Foiling Murphy's Law JEFFERY L. LARKIN, ROY A. GR... more Chapter 5 Returning Elk to Appalachia: Foiling Murphy's Law JEFFERY L. LARKIN, ROY A. GRIMES, LOUIS CORNICELLI, JOHN J. COX AND ... There have been six attempts to restore elk east of the Mississippi River since the early 1900s (Bryant and Maser 1982 ...
Widespread population declines of the Golden-winged Warbler (Vermivora chrysoptera) are thought t... more Widespread population declines of the Golden-winged Warbler (Vermivora chrysoptera) are thought to be due in part to hybridization with the expanding Blue-winged Warbler (V. pinus), which predictably replaces Golden-winged Warblers at breeding sites in which the two species come into contact. However, the mechanism by which this replacement occurs remains unresolved. Recent genetic work has indicated that, even in areas where the two species have been in contact for a short period, introgression of Blue-winged mitochondrial (mtDNA) and nuclear genes into Golden-winged individuals is common. To explore this process on a broader scale, we screened more than 750 individuals from nine U.S. states and three provinces to examine geographic patterns of mtDNA introgression. The only population in which all phenotypic Golden-winged Warblers had Golden-winged mtDNA haplotypes, and in which there are no breeding Blue-winged or hybrid individuals, was in the province of Manitoba, near the north...
... Geology of Kentucky. Waverly Publishing, Baltimore, MD. 531. pp. MECH, LD 1983. Handbook of A... more ... Geology of Kentucky. Waverly Publishing, Baltimore, MD. 531. pp. MECH, LD 1983. Handbook of Animal Radio-tracking. University of Minnesota Press, Minneapolis, MN. 107. pp. MOHR, CO 1947. Table of equivalent populations of North American small mammals. ...
We compared habitat features of Golden-winged Warbler (Vermivora chrysoptera) territories in the ... more We compared habitat features of Golden-winged Warbler (Vermivora chrysoptera) territories in the presence and absence of the Blue-winged Warbler (V. cyanoptera) on reclaimed coal mines in southeastern Kentucky, USA. Our objective was to determine whether there are ...
... Jeffery L. Larkin 1,2,3 ,; John J. Cox 1,2 ,; Michael W. Wichrowski 2 ,; Matthew R. Dzialak 1... more ... Jeffery L. Larkin 1,2,3 ,; John J. Cox 1,2 ,; Michael W. Wichrowski 2 ,; Matthew R. Dzialak 1,2 ,; David S. Maehr 2. ... distribute elk widely across the restoration zone, but the resulting density of individuals may be insufficient to promote population growth and stability (Gogan & Barrett ...
A recent model of Florida panther (Puma concolor coryi) habitat erred in arbitrarily creating buf... more A recent model of Florida panther (Puma concolor coryi) habitat erred in arbitrarily creating buffers around radio locations collected during daylight hours on the assumption that study animals were only at rest during these times. The buffers generated by this method likely cause an overestimation of the amounts and kinds of habitats that are used by the panther. This, and other errors, could lead to the impression that unfragmented forest cover is unimportant to panther conservation, and could encourage inaccurate characterizations of panther habitat. Previous 24-hour monitoring of activity and activity readings made during routine telemetry flights indicate that high levels of activity occur in the early morning hours. Literature on the behavior of the species does not support the creation of large buffers around telemetry locations to compensate for the lack of nighttime telemetry data. A thorough examination of ongoing studies that use global positioning systems may help calibr...
... JEREMY D. DIXON, MADAN K. OLI, MICHAEL C. WOOTEN, THOMAS H. EASON, J. WALTER McCOWN, DAVID PA... more ... JEREMY D. DIXON, MADAN K. OLI, MICHAEL C. WOOTEN, THOMAS H. EASON, J. WALTER McCOWN, DAVID PAETKAU. (2006 ... 2006. Jeffery L. Larkin, David S. Maehr, Thomas S. Hoctor, Michael A. Orlando, Karen Whitney. ...
On 20 April 2003, we found an active Eastern Phoebe (Sayornis phoebe) nest located under a capsto... more On 20 April 2003, we found an active Eastern Phoebe (Sayornis phoebe) nest located under a capstone rock ledge on a reclaimed mine in Breathitt County, Kentucky. The capstone was one of several clustered together on top of a southwestern slope at 420 m in ...
... Yet species found in grassy openings in the adjacent forests such as Synaptomys cooperi Baird... more ... Yet species found in grassy openings in the adjacent forests such as Synaptomys cooperi Baird (Southern Bog Lemming), Blarina brevicauda ... Chestnut) on uncompacted mine spoil in eastern Kentucky failed due to seed predation by small mammals (C. Barton, University of ...
ABSTRACT Disruptions in metapopulation connectivity due to demographic pressure can leave genetic... more ABSTRACT Disruptions in metapopulation connectivity due to demographic pressure can leave genetically isolated subpopulations susceptible to genetic drift, accumulation of deleterious alleles, and inbreeding depression. Such a scenario may be playing out within Allegheny woodrat (Neotoma magister) metapopulations as a series of synergistic extrinsic pressures have contributed to the rangewide decline of the species over the last 40 years. Our goal was to elucidate the effects of demographic collapse on metapopulation function by using 11 microsatellites markers to quantify differences in patterns of connectivity and genetic diversity between a demographically stable metapopulation and one in severe demographic decline. The demographically diminished metapopulation had lower levels of genetic diversity than the stable metapopulation at all levels evaluated (metapopulation-, subpopulation-, and individual-scales). In contrast to patterns of connectivity observed within the stable metapopulation, peripheral subpopulations in the diminished metapopulation had become completely isolated and were drifting toward genetic fixation, likely as a result of the extirpation of stepping-stone subpopulations. The declining genetic parameters observed within these isolated peripheral subpopulations suggest that inbreeding depression may be contributing significantly to their demographic decline. Allegheny woodrats readily express the genetic consequences of metapopulation decline due to the low effective population sizes of subpopulations and the species’ limited dispersal capacity. Differences in genetic parameters observed between demographically stable and diminished Allegheny woodrat metapopulations emphasize the risks posed to metapopulation function and associated genetic processes introduced with demographic decline.
We compared habitat features of Golden-winged Warbler (Vermivora chrysoptera) territories in the ... more We compared habitat features of Golden-winged Warbler (Vermivora chrysoptera) territories in the presence and absence of the Blue-winged Warbler (V. cyanoptera) on reclaimed coal mines in southeastern Kentucky, USA. Our objective was to determine whether there are ...
Chapter 5 Returning Elk to Appalachia: Foiling Murphy's Law JEFFERY L. LARKIN, ROY A. GR... more Chapter 5 Returning Elk to Appalachia: Foiling Murphy's Law JEFFERY L. LARKIN, ROY A. GRIMES, LOUIS CORNICELLI, JOHN J. COX AND ... There have been six attempts to restore elk east of the Mississippi River since the early 1900s (Bryant and Maser 1982 ...
Widespread population declines of the Golden-winged Warbler (Vermivora chrysoptera) are thought t... more Widespread population declines of the Golden-winged Warbler (Vermivora chrysoptera) are thought to be due in part to hybridization with the expanding Blue-winged Warbler (V. pinus), which predictably replaces Golden-winged Warblers at breeding sites in which the two species come into contact. However, the mechanism by which this replacement occurs remains unresolved. Recent genetic work has indicated that, even in areas where the two species have been in contact for a short period, introgression of Blue-winged mitochondrial (mtDNA) and nuclear genes into Golden-winged individuals is common. To explore this process on a broader scale, we screened more than 750 individuals from nine U.S. states and three provinces to examine geographic patterns of mtDNA introgression. The only population in which all phenotypic Golden-winged Warblers had Golden-winged mtDNA haplotypes, and in which there are no breeding Blue-winged or hybrid individuals, was in the province of Manitoba, near the north...
... Geology of Kentucky. Waverly Publishing, Baltimore, MD. 531. pp. MECH, LD 1983. Handbook of A... more ... Geology of Kentucky. Waverly Publishing, Baltimore, MD. 531. pp. MECH, LD 1983. Handbook of Animal Radio-tracking. University of Minnesota Press, Minneapolis, MN. 107. pp. MOHR, CO 1947. Table of equivalent populations of North American small mammals. ...
We compared habitat features of Golden-winged Warbler (Vermivora chrysoptera) territories in the ... more We compared habitat features of Golden-winged Warbler (Vermivora chrysoptera) territories in the presence and absence of the Blue-winged Warbler (V. cyanoptera) on reclaimed coal mines in southeastern Kentucky, USA. Our objective was to determine whether there are ...
... Jeffery L. Larkin 1,2,3 ,; John J. Cox 1,2 ,; Michael W. Wichrowski 2 ,; Matthew R. Dzialak 1... more ... Jeffery L. Larkin 1,2,3 ,; John J. Cox 1,2 ,; Michael W. Wichrowski 2 ,; Matthew R. Dzialak 1,2 ,; David S. Maehr 2. ... distribute elk widely across the restoration zone, but the resulting density of individuals may be insufficient to promote population growth and stability (Gogan & Barrett ...
A recent model of Florida panther (Puma concolor coryi) habitat erred in arbitrarily creating buf... more A recent model of Florida panther (Puma concolor coryi) habitat erred in arbitrarily creating buffers around radio locations collected during daylight hours on the assumption that study animals were only at rest during these times. The buffers generated by this method likely cause an overestimation of the amounts and kinds of habitats that are used by the panther. This, and other errors, could lead to the impression that unfragmented forest cover is unimportant to panther conservation, and could encourage inaccurate characterizations of panther habitat. Previous 24-hour monitoring of activity and activity readings made during routine telemetry flights indicate that high levels of activity occur in the early morning hours. Literature on the behavior of the species does not support the creation of large buffers around telemetry locations to compensate for the lack of nighttime telemetry data. A thorough examination of ongoing studies that use global positioning systems may help calibr...
... JEREMY D. DIXON, MADAN K. OLI, MICHAEL C. WOOTEN, THOMAS H. EASON, J. WALTER McCOWN, DAVID PA... more ... JEREMY D. DIXON, MADAN K. OLI, MICHAEL C. WOOTEN, THOMAS H. EASON, J. WALTER McCOWN, DAVID PAETKAU. (2006 ... 2006. Jeffery L. Larkin, David S. Maehr, Thomas S. Hoctor, Michael A. Orlando, Karen Whitney. ...
On 20 April 2003, we found an active Eastern Phoebe (Sayornis phoebe) nest located under a capsto... more On 20 April 2003, we found an active Eastern Phoebe (Sayornis phoebe) nest located under a capstone rock ledge on a reclaimed mine in Breathitt County, Kentucky. The capstone was one of several clustered together on top of a southwestern slope at 420 m in ...
... Yet species found in grassy openings in the adjacent forests such as Synaptomys cooperi Baird... more ... Yet species found in grassy openings in the adjacent forests such as Synaptomys cooperi Baird (Southern Bog Lemming), Blarina brevicauda ... Chestnut) on uncompacted mine spoil in eastern Kentucky failed due to seed predation by small mammals (C. Barton, University of ...
ABSTRACT Disruptions in metapopulation connectivity due to demographic pressure can leave genetic... more ABSTRACT Disruptions in metapopulation connectivity due to demographic pressure can leave genetically isolated subpopulations susceptible to genetic drift, accumulation of deleterious alleles, and inbreeding depression. Such a scenario may be playing out within Allegheny woodrat (Neotoma magister) metapopulations as a series of synergistic extrinsic pressures have contributed to the rangewide decline of the species over the last 40 years. Our goal was to elucidate the effects of demographic collapse on metapopulation function by using 11 microsatellites markers to quantify differences in patterns of connectivity and genetic diversity between a demographically stable metapopulation and one in severe demographic decline. The demographically diminished metapopulation had lower levels of genetic diversity than the stable metapopulation at all levels evaluated (metapopulation-, subpopulation-, and individual-scales). In contrast to patterns of connectivity observed within the stable metapopulation, peripheral subpopulations in the diminished metapopulation had become completely isolated and were drifting toward genetic fixation, likely as a result of the extirpation of stepping-stone subpopulations. The declining genetic parameters observed within these isolated peripheral subpopulations suggest that inbreeding depression may be contributing significantly to their demographic decline. Allegheny woodrats readily express the genetic consequences of metapopulation decline due to the low effective population sizes of subpopulations and the species’ limited dispersal capacity. Differences in genetic parameters observed between demographically stable and diminished Allegheny woodrat metapopulations emphasize the risks posed to metapopulation function and associated genetic processes introduced with demographic decline.
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