期刊
HERPETOLOGICAL CONSERVATION AND BIOLOGY
卷 11, 期 2, 页码 373-383出版社
HERPETOLOGICAL CONSERVATION & BIOLOGY
关键词
amphibians; calling survey; NAAMP; occupancy modeling; occupancy trends
类别
We present the first regional trends in anuran occupancy for eight states of the southeastern United States, based on 13 y (2001-2013) of North American Amphibian Monitoring Program (NAAMP) data. The NAAMP is a longterm monitoring program in which observers collect anuran calling observation data at fixed locations along random roadside routes. We assessed occupancy trends for 14 species. We found weak evidence for a general regional pattern of decline in calling anurans within breeding habitats along roads in the southeastern USA over the last 13 y. Two species had positive regional trends with 95% posterior intervals that did not include zero (Hyla cinerea and Pseudacris crucifer). Five other species also showed an increasing trend, while eight species showed a declining trend, although 95% posterior intervals included zero. We also assessed state level trends for 107 species/ state combinations. Of these, 14 showed a significant decline and 12 showed a significant increase in occupancy (i. e., credible intervals did not include zero for these 26 trends).
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