The importance of understanding spatial population structure when evaluating the effects of silviculture on spotted salamanders (Ambystoma maculatum)

Current silvicultural practices in the northeastern United States create diverse vegetation patterns and microclimates that provide a mosaic of terrestrial habitats for amphibian species. We inferred patterns of habitat use by the spotted salamander, Ambystoma maculatum, by studying colonization of...

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Veröffentlicht in:Biological conservation 2008-03, Vol.141 (3), p.807-814
Hauptverfasser: Patrick, David A., Calhoun, Aram J.K., Hunter, Malcolm L.
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creator Patrick, David A.
Calhoun, Aram J.K.
Hunter, Malcolm L.
description Current silvicultural practices in the northeastern United States create diverse vegetation patterns and microclimates that provide a mosaic of terrestrial habitats for amphibian species. We inferred patterns of habitat use by the spotted salamander, Ambystoma maculatum, by studying colonization of four newly created breeding pools each surrounded by four different forest treatments: a control, partial cut, clearcut with coarse woody debris (CWD) removed, and clearcut with CWD retained. Created pools were rapidly colonized, indicating that breeding salamanders readily bred in new pools they encountered. This suggests that in our study area pool-specific philopatry and site fidelity may not be high and that particular pools may not define local breeding populations. In the experimental silvicultural treatments, juvenile salamanders preferred the control forest to the clearcuts, whereas adult salamanders showed no significant preferences among the treatments. Although silvicultural practices such as clearcutting may reduce juvenile movement between pools, inter-pool movement by adults that are more tolerant of habitat change may ameliorate this effect in our study area. If juveniles are the primary life-history stage dispersing between local populations (i.e., moving between more isolated groups of pools), however, there is potential for clearcutting to reduce the connectivity between local populations.
doi_str_mv 10.1016/j.biocon.2007.12.026
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We inferred patterns of habitat use by the spotted salamander, Ambystoma maculatum, by studying colonization of four newly created breeding pools each surrounded by four different forest treatments: a control, partial cut, clearcut with coarse woody debris (CWD) removed, and clearcut with CWD retained. Created pools were rapidly colonized, indicating that breeding salamanders readily bred in new pools they encountered. This suggests that in our study area pool-specific philopatry and site fidelity may not be high and that particular pools may not define local breeding populations. In the experimental silvicultural treatments, juvenile salamanders preferred the control forest to the clearcuts, whereas adult salamanders showed no significant preferences among the treatments. Although silvicultural practices such as clearcutting may reduce juvenile movement between pools, inter-pool movement by adults that are more tolerant of habitat change may ameliorate this effect in our study area. If juveniles are the primary life-history stage dispersing between local populations (i.e., moving between more isolated groups of pools), however, there is potential for clearcutting to reduce the connectivity between local populations.</description><subject>Ambystoma</subject><subject>Ambystoma maculatum</subject><subject>Amphibia. Reptilia</subject><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Biological and medical sciences</subject><subject>breeding sites</subject><subject>Caudata</subject><subject>clearcutting</subject><subject>Conservation, protection and management of environment and wildlife</subject><subject>forest ecosystems</subject><subject>forest habitats</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Juvenile</subject><subject>microclimate</subject><subject>Movement</subject><subject>Parks, reserves, wildlife conservation. Endangered species: population survey and restocking</subject><subject>Population structure</subject><subject>salamanders and newts</subject><subject>silvicultural practices</subject><subject>Silviculture</subject><subject>spatial data</subject><subject>Spotted salamander</subject><subject>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</subject><subject>wildlife habitats</subject><subject>young animals</subject><issn>0006-3207</issn><issn>1873-2917</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNp9kcFu1DAQhiMEEkvhDZDwBUQPCbaTTdYXpKqCglSJA-3Zmjjj1isnDrazqA_C-zJpKo6cPKP5_hnr_4vireCV4KL9dKx6F0yYKsl5VwlZcdk-K3bi0NWlVKJ7Xuw4521ZS969LF6ldKS2q9v9rvhzc4_MjXOIGSaDLFi2TAPGRO3gpjuWZsgOPJvDvHgqw8RSjovJS0T2-x4nhifwC00IzrQMrUWT07opOX9yZvGP7CqcQ844sAQeRng8wz5ejP1DymEENoJZTyzj-evihQWf8M3Te1bcfv1yc_mtvP5x9f3y4ro0tRK57E3b9w3v98YoDrVSCE1rlGn6Dg9CohpEYy0hgzVKSbBCDr04CKrlAAj1WfFh2zvH8GvBlPXokkHvYcKwJE1-daJpFIHNBpoYUopo9RzdCPFBC67XDPRRbxnoNQMtpKYMSPb-aT8kA95G8tilf1pJwrbmK_du4ywEDXeRmNufNK05pwy7vSTi80Yg2XFyGHUyDimxwUWyWw_B_f8rfwHDaq2h</recordid><startdate>20080301</startdate><enddate>20080301</enddate><creator>Patrick, David A.</creator><creator>Calhoun, Aram J.K.</creator><creator>Hunter, Malcolm L.</creator><general>Elsevier Ltd</general><general>Kidlington, Oxford: Elsevier Science Ltd</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7ST</scope><scope>7U6</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope></search><sort><creationdate>20080301</creationdate><title>The importance of understanding spatial population structure when evaluating the effects of silviculture on spotted salamanders (Ambystoma maculatum)</title><author>Patrick, David A. ; Calhoun, Aram J.K. ; Hunter, Malcolm L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c391t-bc6bb40b5cc90a399ea46c9c4b7e812e9d14ffbb4dfc992af12db1819922daea3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Ambystoma</topic><topic>Ambystoma maculatum</topic><topic>Amphibia. 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subjects Ambystoma
Ambystoma maculatum
Amphibia. Reptilia
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
breeding sites
Caudata
clearcutting
Conservation, protection and management of environment and wildlife
forest ecosystems
forest habitats
Fundamental and applied biological sciences. Psychology
Juvenile
microclimate
Movement
Parks, reserves, wildlife conservation. Endangered species: population survey and restocking
Population structure
salamanders and newts
silvicultural practices
Silviculture
spatial data
Spotted salamander
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
wildlife habitats
young animals
title The importance of understanding spatial population structure when evaluating the effects of silviculture on spotted salamanders (Ambystoma maculatum)
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