NDLI: Community structure and differential responses of aquatic turtles to agriculturally induced habitat fragmentation

Content Provider	Springer Nature Link
Author	Rizkalla, Carol E. Swihart, Robert K.
Copyright Year	2006
Abstract	Several studies have shown that wetland loss and habitat fragmentation can alter diversity and abundance of herpetofauna, but taxonomic attention has been skewed towards amphibians. We assessed responses of aquatic turtles to features at multiple spatial scales in an intensively farmed region of the Midwestern United States. Spatially hierarchical sampling was conducted from 2001 to 2003 in 35 randomly selected 23-km$^{2}$ cells throughout the upper Wabash River basin in Indiana. Hoop nets were used at wetlands to capture common snapping turtles (Chelydra serpentina serpentina) (n=258), midland painted turtles (Chrysemys picta marginata) (151), eastern spiny softshells (Apalone spinifera spinifera) (70), red-eared sliders (Trachemys scripta elegans) (59), northern map turtles (Graptemys geographica) (27), false map turtles (Graptemys pseudogeographica pseudogeographica) (6), Blanding’s turtles (Emydoidea blandingii) (3), and stinkpot turtles (Sternotherus odoratus) (3). We examined the degree to which these aquatic species were nonrandomly distributed in 14 landscapes. Assemblages of turtles generally were random and the extent of nestedness was influenced by the diversity of landcover, the proportion of grassland, and the total length of roads in each landscape. The occurrence and abundance of several species also were modeled to test hypotheses regarding the importance of site, patch, and landscape-level variables. Red-eared sliders appeared to be most sensitive to habitat fragmentation, whereas painted turtles, snapping turtles, map turtles, and spiny softshells were less affected. Factors at multiple spatial scales affect turtle distributions, suggesting differential responses to landscape fragmentation.
Starting Page	1361
Ending Page	1375
Page Count	15
File Format	PDF
ISSN	09212973
Journal	Landscape Ecology
Volume Number	21
Issue Number	8
e-ISSN	15729761
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Abundance Fragmentation Northern map turtle Nestedness Occupancy Midland painted turtle Red-eared slider Common snapping turtle Eastern spiny softshell Ecology Landscape Ecology Plant Ecology Forestry Forestry Management Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Nature and Landscape Conservation

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