Climate-Induced Habitat Fragmentation Affects Metapopulation Structure of Arctic Grayling in Tundra Streams
Climate change is altering ecosystems across the globe, with ecological and evolutionary consequences affecting species persistence and biodiversity. I investigated the effects of changing hydrology on Arctic grayling (Thymallus arcticus) metapopulation structure, microgeographic differentiation, mo...
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University of Connecticut
2016
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ftconnecticstlib:oai:oai:collections.ctdigitalarchive.org:20002_860651449 2023-05-15T14:31:18+02:00 Climate-Induced Habitat Fragmentation Affects Metapopulation Structure of Arctic Grayling in Tundra Streams Golden, Heidi E. (Creator) Urban, Mark C. (Major Advisor) Deegan, Linda A. (Associate Advisor) Holsinger, Kent (Associate Advisor) Schultz, Eric (Associate Advisor) Vokoun, Jason (Associate Advisor) University of Connecticut (Degree grantor) 2016 application/pdf http://hdl.handle.net/11134/20002:860651449 https://digitalcollections.ctstatelibrary.org/islandora/object/20002%3A860651449/datastream/TN/view/Climate-Induced%20Habitat%20Fragmentation%20Affects%20Metapopulation%20Structure%20of%20Arctic%20Grayling%20in%20Tundra%20Streams.jpg unknown University of Connecticut In Copyright These materials are provided for educational and research purposes only. Text doctoral dissertation 2016 ftconnecticstlib 2022-05-09T15:40:07Z Climate change is altering ecosystems across the globe, with ecological and evolutionary consequences affecting species persistence and biodiversity. I investigated the effects of changing hydrology on Arctic grayling (Thymallus arcticus) metapopulation structure, microgeographic differentiation, movement patterns and vital rates using neutral genetic microsatellite markers, remote sensing of PIT-tagged individuals, body condition and ovarian histology. Arctic grayling within the study area on Alaska’s North Slope comprised five distinct genetic clusters. River distance and dry zones were significant factors explaining genetic differentiation among locations. Migration was low and asymmetrical among genetic clusters, but higher from headwater populations to the large coastal population than contrariwise. Adult Arctic grayling spawning movement patterns strongly associated with microgeographic neutral genetic differentiation within two watersheds. Following drought, I found significant differences in fall movement patterns and subsequent increased mortality of detained versus non-detained fish. My research on Arctic grayling underscores the significance of maintaining habitat connectivity for metapopulation persistence and the importance of including connectivity in conservation and management models to help mitigate the effects of climate change on species extinctions. Archives & Special Collections, University of Connecticut Library Doctoral or Postdoctoral Thesis Arctic grayling Arctic Climate change Thymallus arcticus Tundra Connecticut Digital Archive Arctic |
institution |
Open Polar |
collection |
Connecticut Digital Archive |
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ftconnecticstlib |
language |
unknown |
description |
Climate change is altering ecosystems across the globe, with ecological and evolutionary consequences affecting species persistence and biodiversity. I investigated the effects of changing hydrology on Arctic grayling (Thymallus arcticus) metapopulation structure, microgeographic differentiation, movement patterns and vital rates using neutral genetic microsatellite markers, remote sensing of PIT-tagged individuals, body condition and ovarian histology. Arctic grayling within the study area on Alaska’s North Slope comprised five distinct genetic clusters. River distance and dry zones were significant factors explaining genetic differentiation among locations. Migration was low and asymmetrical among genetic clusters, but higher from headwater populations to the large coastal population than contrariwise. Adult Arctic grayling spawning movement patterns strongly associated with microgeographic neutral genetic differentiation within two watersheds. Following drought, I found significant differences in fall movement patterns and subsequent increased mortality of detained versus non-detained fish. My research on Arctic grayling underscores the significance of maintaining habitat connectivity for metapopulation persistence and the importance of including connectivity in conservation and management models to help mitigate the effects of climate change on species extinctions. Archives & Special Collections, University of Connecticut Library |
author2 |
Golden, Heidi E. (Creator) Urban, Mark C. (Major Advisor) Deegan, Linda A. (Associate Advisor) Holsinger, Kent (Associate Advisor) Schultz, Eric (Associate Advisor) Vokoun, Jason (Associate Advisor) University of Connecticut (Degree grantor) |
format |
Doctoral or Postdoctoral Thesis |
title |
Climate-Induced Habitat Fragmentation Affects Metapopulation Structure of Arctic Grayling in Tundra Streams |
spellingShingle |
Climate-Induced Habitat Fragmentation Affects Metapopulation Structure of Arctic Grayling in Tundra Streams |
title_short |
Climate-Induced Habitat Fragmentation Affects Metapopulation Structure of Arctic Grayling in Tundra Streams |
title_full |
Climate-Induced Habitat Fragmentation Affects Metapopulation Structure of Arctic Grayling in Tundra Streams |
title_fullStr |
Climate-Induced Habitat Fragmentation Affects Metapopulation Structure of Arctic Grayling in Tundra Streams |
title_full_unstemmed |
Climate-Induced Habitat Fragmentation Affects Metapopulation Structure of Arctic Grayling in Tundra Streams |
title_sort |
climate-induced habitat fragmentation affects metapopulation structure of arctic grayling in tundra streams |
publisher |
University of Connecticut |
publishDate |
2016 |
url |
http://hdl.handle.net/11134/20002:860651449 https://digitalcollections.ctstatelibrary.org/islandora/object/20002%3A860651449/datastream/TN/view/Climate-Induced%20Habitat%20Fragmentation%20Affects%20Metapopulation%20Structure%20of%20Arctic%20Grayling%20in%20Tundra%20Streams.jpg |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic grayling Arctic Climate change Thymallus arcticus Tundra |
genre_facet |
Arctic grayling Arctic Climate change Thymallus arcticus Tundra |
op_rights |
In Copyright These materials are provided for educational and research purposes only. |
_version_ |
1766304962117107712 |