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Your search keyword '"Eggert, Lori S."' showing total 246 results
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246 results on '"Eggert, Lori S."'

15. Effects of a hydropower project on a high‐value Asian elephant population.

Author

Budd, Kris, Suddychan, Daophone, Tyson, Martin, Coudrat, Camille N. Z., McWilliam, Alex, Hallam, Christopher D., Johnson, Arlyne, and Eggert, Lori S.

Subjects
ASIATIC elephant, GENETIC variation, ENDANGERED species, POPULATION dynamics, SEX ratio, FRAGMENTED landscapes, WATER power
Abstract

Habitat loss and fragmentation are leading contributors to the endangered status of species. In 2006, the Nakai Plateau contained the largest known Asian elephant (Elephas maximus) population in the Lao People's Democratic Republic (Lao PDR), and the population was among those with the highest genetic diversity reported for Asian elephants. In 2008, completion of the Nam Theun 2 hydroelectric dam inundated much of the Plateau, resulting in the loss of 40% of elephant habitat. We studied elephant presence, movements, and the incidence of human–elephant conflict (HEC) on the Nakai Plateau and surrounding areas from 2004 to 2020, before and for 12 years after dam completion. To examine contemporary population dynamics in the Nakai elephants, we used genetic sampling to compare minimum population numbers, demography, and levels of genetic diversity from the wet and dry seasons in 2018/2019, 10 years after dam completion, with those reported in a pre‐dam‐completion genetic survey. After dam completion, we found a major increase in HEC locally and the creation of new, serious, and persistent HEC problems as far as 100 km away. While we were unable to compare estimated population sizes before and after dam completion, our data revealed a decrease in genetic diversity, a male‐biased sex ratio, and evidence of dispersal from the Plateau by breeding‐age females. Our results raise concerns about the long‐term viability of this important population as well as that of other species in this region. Given that hydropower projects are of economic importance throughout Laos and elsewhere in southeast Asia, this study has important implications for understanding and mitigating their impact. [ABSTRACT FROM AUTHOR]

Published
2023
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17. Pond-Breeding Amphibian Community Composition in Missouri

Author

DRAKE, DANA L., OUSTERHOUT, BRITTANY H., JOHNSON, JARRETT R., ANDERSON, THOMAS L., PETERMAN, WILLIAM E., SHULSE, CHRISTOPHER D., HOCKING, DANIEL J., LOHRAFF, KENTON L., HARPER, ELIZABETH B., RITTENHOUSE, TRACY A. G., ROTHERMEL, BETSIE B., EGGERT, LORI S., and SEMLITSCH, RAYMOND D.

Published
2015

27. One size does not fit all: Genetic considerations from the Missouri elk restoration

Author

Pero, Ellen M., primary, Bell, Donovan A., additional, Robinson, Zachary L., additional, Chitwood, M. Colter, additional, Hildreth, Aaron M., additional, Berkman, Leah K., additional, Keller, Barbara J., additional, Sumners, Jason A., additional, Hansen, Lonnie P., additional, Isabelle, Jason L., additional, Eggert, Lori S., additional, Titus, Chelsea L., additional, and Millspaugh, Joshua J., additional

Published
2021
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29. Resolving the Evolution of Extant and Extinct Ruminants with High-Throughput Phylogenomics

Author

Decker, Jared E., Pires, J. Chris, Conant, Gavin C., McKay, Stephanie D., Heaton, Michael P., Chen, Kefei, Cooper, Alan, Vilkki, Johanna, Seabury, Christopher M., Caetano, Alexandre R., Johnson, Gary S., Brenneman, Rick A., Hanotte, Olivier, Eggert, Lori S., Wiener, Pamela, Kim, Jong-Joo, Kim, Kwan Suk, Sonstegard, Tad S., Van Tassell, Curt P., Neibergs, Holly L., McEwan, John C., Brauning, Rudiger, Coutinho, Luiz L., Babar, Masroor E., Wilson, Gregory A., McClure, Matthew C., Rolf, Megan M., Kim, JaeWoo, Schnabel, Robert D., and Taylor, Jeremy F.

Published
2009
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40. One size does not fit all: Genetic considerations from the Missouri elk restoration.

Author

Pero, Ellen M., Bell, Donovan A., Robinson, Zachary L., Chitwood, M. Colter, Hildreth, Aaron M., Berkman, Leah K., Keller, Barbara J., Sumners, Jason A., Hansen, Lonnie P., Isabelle, Jason L., Eggert, Lori S., Titus, Chelsea L., and Millspaugh, Joshua J.

Subjects
ELK, ANIMAL introduction, GENETIC variation, EMIGRATION & immigration, HETEROZYGOSITY, SUCCESS
Abstract

Population restoration is an inherently costly conservation practice typically reliant on animal translocations. There are many approaches to translocation and consideration is paid to understanding how various translocation models influence restoration success. Translocation strategies are often designed to meet site‐specific objectives, minimize cost, and maximize success. We investigated genetic diversity retention associated with the low‐founder, multi‐release, single admixed stock translocation model of the Missouri elk (Cervus canadensis) restoration in 2011–2013. We further estimated effective population size and projected future losses in genetic diversity if the restored Missouri elk herd is maintained at the population size objective with no immigration from neighboring states. We observed relatively high levels of genetic diversity retention as evidenced by minimal losses in allelic richness and expected heterozygosity. Our projections indicated 90% genetic diversity retention within the Missouri population for roughly 130 years. Where number of progeny or source stocks are limited by resource or disease considerations, use of a relatively low‐founder, single admixed source may enable retention of genetic variation, while minimizing costs. [ABSTRACT FROM AUTHOR]

Published
2022
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49. Genetic structure along an elevational gradient in Hawaiian honeycreepers reveals contrasting evolutionary responses to avian malaria

Author

Hart Patrick J, Woodworth Bethany L, Terwilliger Lauren A, Eggert Lori S, Palmer Danielle, and Fleischer Robert C

Subjects
Evolution, QH359-425
Abstract

Abstract Background The Hawaiian honeycreepers (Drepanidinae) are one of the best-known examples of an adaptive radiation, but their persistence today is threatened by the introduction of exotic pathogens and their vector, the mosquito Culex quinquefasciatus. Historically, species such as the amakihi (Hemignathus virens), the apapane (Himatione sanguinea), and the iiwi (Vestiaria coccinea) were found from the coastal lowlands to the high elevation forests, but by the late 1800's they had become extremely rare in habitats below 900 m. Recently, however, populations of amakihi and apapane have been observed in low elevation habitats. We used twelve polymorphic microsatellite loci to investigate patterns of genetic structure, and to infer responses of these species to introduced avian malaria along an elevational gradient on the eastern flanks of Mauna Loa and Kilauea volcanoes on the island of Hawaii. Results Our results indicate that amakihi have genetically distinct, spatially structured populations that correspond with altitude. We detected very few apapane and no iiwi in low-elevation habitats, and genetic results reveal only minimal differentiation between populations at different altitudes in either of these species. Conclusion Our results suggest that amakihi populations in low elevation habitats have not been recolonized by individuals from mid or high elevation refuges. After generations of strong selection for pathogen resistance, these populations have rebounded and amakihi have become common in regions in which they were previously rare or absent.

Published
2008
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