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Comparative landscape genetics of two endemic torrent salamander species, Rhyacotriton kezeri and R. variegatus: implications for forest management and species conservation
Comparative landscape genetic studies provide insights into whether relationships between landscape features and patterns of spatial genetic structure differ among populations, species, habitat types, and regions. For species with fragmented distributions, especially when management practices contri...
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| Published in: | Conservation genetics 2019-08, Vol.20 (4), p.801-815 |
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| creator | Emel, Sarah L. Olson, Deanna H. Knowles, L. Lacey Storfer, Andrew |
| description | Comparative landscape genetic studies provide insights into whether relationships between landscape features and patterns of spatial genetic structure differ among populations, species, habitat types, and regions. For species with fragmented distributions, especially when management practices contribute to fragmentation, tests of the factors structuring population connectivity are particularly important for understanding continued risks. We determined levels of genetic diversity and tested the relationships of landscape-scale vegetative, geographic, and climate variables with genetic distance in two congeneric, endemic salamander species with status of concern. Using microsatellite data for 326
Rhyacotriton kezeri
and 557
Rhyacotriton variegatus
individuals collected from 17 to 29 localities, respectively, we implemented a model of landscape resistance based on circuit theory. The northernmost portions of each species’ range is more fragmented than areas to the south, leading to the prediction that these areas would have relatively lower genetic diversity in response. Due to reliance of both species upon cold-water habitats, we predicted that landscape variables maintaining cool, moist microhabitats would be correlated with gene flow. Genetic structure was high overall and trended toward increasing with the proportion of the forested landscape. Based on maximum likelihood population effects models across genetic clusters and species, land cover and roads were the best predictors of genetic distance, even though the degree of fragmentation differed across each species’ geographic range. Our results suggest that forest cover is essential for dispersal in these salamanders, indicating negative effects of fragmentation resulting from timber harvest and other forest disturbances. |
| doi_str_mv | 10.1007/s10592-019-01172-6 |
| format | article |
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Rhyacotriton kezeri
and 557
Rhyacotriton variegatus
individuals collected from 17 to 29 localities, respectively, we implemented a model of landscape resistance based on circuit theory. The northernmost portions of each species’ range is more fragmented than areas to the south, leading to the prediction that these areas would have relatively lower genetic diversity in response. Due to reliance of both species upon cold-water habitats, we predicted that landscape variables maintaining cool, moist microhabitats would be correlated with gene flow. Genetic structure was high overall and trended toward increasing with the proportion of the forested landscape. Based on maximum likelihood population effects models across genetic clusters and species, land cover and roads were the best predictors of genetic distance, even though the degree of fragmentation differed across each species’ geographic range. Our results suggest that forest cover is essential for dispersal in these salamanders, indicating negative effects of fragmentation resulting from timber harvest and other forest disturbances.</description><identifier>ISSN: 1566-0621</identifier><identifier>EISSN: 1572-9737</identifier><identifier>DOI: 10.1007/s10592-019-01172-6</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Amphibians ; Animal Genetics and Genomics ; Biodiversity ; Biomedical and Life Sciences ; Conservation Biology/Ecology ; Dispersal ; Ecology ; Endemic species ; Evolutionary Biology ; Forest conservation ; Forest management ; Forests ; Fragmentation ; Gene flow ; Genetic distance ; Genetic diversity ; Genetic structure ; Genetics ; Land cover ; Land use ; Landscape ; Life Sciences ; Mathematical models ; Microhabitats ; Plant Genetics and Genomics ; Population genetics ; Predictions ; Reptiles & amphibians ; Research Article ; Rhyacotriton kezeri ; Species diversity ; Timber ; Wildlife conservation</subject><ispartof>Conservation genetics, 2019-08, Vol.20 (4), p.801-815</ispartof><rights>The Author(s) 2019</rights><rights>Conservation Genetics is a copyright of Springer, (2019). All Rights Reserved. © 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c363t-58de8b5f2959397027e3980a9aa0b875ddc8d68dd1233e89698b12d1840f9c6b3</citedby><cites>FETCH-LOGICAL-c363t-58de8b5f2959397027e3980a9aa0b875ddc8d68dd1233e89698b12d1840f9c6b3</cites><orcidid>0000-0002-8304-3131</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids></links><search><creatorcontrib>Emel, Sarah L.</creatorcontrib><creatorcontrib>Olson, Deanna H.</creatorcontrib><creatorcontrib>Knowles, L. Lacey</creatorcontrib><creatorcontrib>Storfer, Andrew</creatorcontrib><title>Comparative landscape genetics of two endemic torrent salamander species, Rhyacotriton kezeri and R. variegatus: implications for forest management and species conservation</title><title>Conservation genetics</title><addtitle>Conserv Genet</addtitle><description>Comparative landscape genetic studies provide insights into whether relationships between landscape features and patterns of spatial genetic structure differ among populations, species, habitat types, and regions. For species with fragmented distributions, especially when management practices contribute to fragmentation, tests of the factors structuring population connectivity are particularly important for understanding continued risks. We determined levels of genetic diversity and tested the relationships of landscape-scale vegetative, geographic, and climate variables with genetic distance in two congeneric, endemic salamander species with status of concern. Using microsatellite data for 326
Rhyacotriton kezeri
and 557
Rhyacotriton variegatus
individuals collected from 17 to 29 localities, respectively, we implemented a model of landscape resistance based on circuit theory. The northernmost portions of each species’ range is more fragmented than areas to the south, leading to the prediction that these areas would have relatively lower genetic diversity in response. Due to reliance of both species upon cold-water habitats, we predicted that landscape variables maintaining cool, moist microhabitats would be correlated with gene flow. Genetic structure was high overall and trended toward increasing with the proportion of the forested landscape. Based on maximum likelihood population effects models across genetic clusters and species, land cover and roads were the best predictors of genetic distance, even though the degree of fragmentation differed across each species’ geographic range. Our results suggest that forest cover is essential for dispersal in these salamanders, indicating negative effects of fragmentation resulting from timber harvest and other forest disturbances.</description><subject>Amphibians</subject><subject>Animal Genetics and Genomics</subject><subject>Biodiversity</subject><subject>Biomedical and Life Sciences</subject><subject>Conservation Biology/Ecology</subject><subject>Dispersal</subject><subject>Ecology</subject><subject>Endemic species</subject><subject>Evolutionary Biology</subject><subject>Forest conservation</subject><subject>Forest management</subject><subject>Forests</subject><subject>Fragmentation</subject><subject>Gene flow</subject><subject>Genetic distance</subject><subject>Genetic diversity</subject><subject>Genetic structure</subject><subject>Genetics</subject><subject>Land cover</subject><subject>Land use</subject><subject>Landscape</subject><subject>Life Sciences</subject><subject>Mathematical models</subject><subject>Microhabitats</subject><subject>Plant Genetics and Genomics</subject><subject>Population genetics</subject><subject>Predictions</subject><subject>Reptiles & amphibians</subject><subject>Research Article</subject><subject>Rhyacotriton kezeri</subject><subject>Species diversity</subject><subject>Timber</subject><subject>Wildlife conservation</subject><issn>1566-0621</issn><issn>1572-9737</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kctKJDEUhgtR8PoCrg64tZxculKJO2lmdEAQRNchnZxqo12VMkn30D7TPKQpW5jdLA45i-__TuCvqnNKrigh7Y9ESaNYTagqQ1tWi73qiDZlUS1v96ddiJoIRg-r45ReCaGCtfSo-jsP_WiiyX6DsDKDS9aMCEscMHubIHSQ_wTAwWHvLeQQIw4ZklmZvtAYIY1oPaZLeHzZGhty9DkM8IYfGD0UBB6vYGOix6XJ63QNvh9X3paDYUjQhTgNpgxFZ5bYT_Yp9a0FWzCMmy_-tDrozCrh2fd7Uj3_-vk0v6vvH25_z2_ua8sFz3UjHcpF0zHVKK5awlrkShKjjCEL2TbOWemEdI4yzlEqoeSCMkfljHTKigU_qS523jGG93X5nH4N6ziUk5oxwhvKmtmsUGxH2RhSitjpMfrexK2mRE-t6F0rurSiv1rRooT4LpQKPCwx_lP_J_UJM1OUBA</recordid><startdate>20190801</startdate><enddate>20190801</enddate><creator>Emel, Sarah L.</creator><creator>Olson, Deanna H.</creator><creator>Knowles, L. 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Lacey ; Storfer, Andrew</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c363t-58de8b5f2959397027e3980a9aa0b875ddc8d68dd1233e89698b12d1840f9c6b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Amphibians</topic><topic>Animal Genetics and Genomics</topic><topic>Biodiversity</topic><topic>Biomedical and Life Sciences</topic><topic>Conservation Biology/Ecology</topic><topic>Dispersal</topic><topic>Ecology</topic><topic>Endemic species</topic><topic>Evolutionary Biology</topic><topic>Forest conservation</topic><topic>Forest management</topic><topic>Forests</topic><topic>Fragmentation</topic><topic>Gene flow</topic><topic>Genetic distance</topic><topic>Genetic diversity</topic><topic>Genetic structure</topic><topic>Genetics</topic><topic>Land cover</topic><topic>Land use</topic><topic>Landscape</topic><topic>Life Sciences</topic><topic>Mathematical models</topic><topic>Microhabitats</topic><topic>Plant Genetics and Genomics</topic><topic>Population genetics</topic><topic>Predictions</topic><topic>Reptiles & amphibians</topic><topic>Research Article</topic><topic>Rhyacotriton kezeri</topic><topic>Species diversity</topic><topic>Timber</topic><topic>Wildlife conservation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Emel, Sarah L.</creatorcontrib><creatorcontrib>Olson, Deanna H.</creatorcontrib><creatorcontrib>Knowles, L. 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Lacey</au><au>Storfer, Andrew</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Comparative landscape genetics of two endemic torrent salamander species, Rhyacotriton kezeri and R. variegatus: implications for forest management and species conservation</atitle><jtitle>Conservation genetics</jtitle><stitle>Conserv Genet</stitle><date>2019-08-01</date><risdate>2019</risdate><volume>20</volume><issue>4</issue><spage>801</spage><epage>815</epage><pages>801-815</pages><issn>1566-0621</issn><eissn>1572-9737</eissn><abstract>Comparative landscape genetic studies provide insights into whether relationships between landscape features and patterns of spatial genetic structure differ among populations, species, habitat types, and regions. For species with fragmented distributions, especially when management practices contribute to fragmentation, tests of the factors structuring population connectivity are particularly important for understanding continued risks. We determined levels of genetic diversity and tested the relationships of landscape-scale vegetative, geographic, and climate variables with genetic distance in two congeneric, endemic salamander species with status of concern. Using microsatellite data for 326
Rhyacotriton kezeri
and 557
Rhyacotriton variegatus
individuals collected from 17 to 29 localities, respectively, we implemented a model of landscape resistance based on circuit theory. The northernmost portions of each species’ range is more fragmented than areas to the south, leading to the prediction that these areas would have relatively lower genetic diversity in response. Due to reliance of both species upon cold-water habitats, we predicted that landscape variables maintaining cool, moist microhabitats would be correlated with gene flow. Genetic structure was high overall and trended toward increasing with the proportion of the forested landscape. Based on maximum likelihood population effects models across genetic clusters and species, land cover and roads were the best predictors of genetic distance, even though the degree of fragmentation differed across each species’ geographic range. Our results suggest that forest cover is essential for dispersal in these salamanders, indicating negative effects of fragmentation resulting from timber harvest and other forest disturbances.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s10592-019-01172-6</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0002-8304-3131</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Amphibians Animal Genetics and Genomics Biodiversity Biomedical and Life Sciences Conservation Biology/Ecology Dispersal Ecology Endemic species Evolutionary Biology Forest conservation Forest management Forests Fragmentation Gene flow Genetic distance Genetic diversity Genetic structure Genetics Land cover Land use Landscape Life Sciences Mathematical models Microhabitats Plant Genetics and Genomics Population genetics Predictions Reptiles & amphibians Research Article Rhyacotriton kezeri Species diversity Timber Wildlife conservation |
| title | Comparative landscape genetics of two endemic torrent salamander species, Rhyacotriton kezeri and R. variegatus: implications for forest management and species conservation |
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