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Title: Reptile and amphibian response to oak regeneration treatments in productive southern Appalachian hardwood forest

Author: Greenberg, Cathryn H.; Moorman, Christopher E.; Raybuck, Amy L.; Sundol, Chad; Keyser, Tara L.; Bush, Janis; Simon, Dean M.; Warburton, Gordon S.;

Date: 2016

Source: Forest Ecology and Management

Publication Series: Scientific Journal (JRNL)

Description: Forest restoration efforts commonly employ silvicultural methods that alter light and competition to influence species composition. Changes to forest structure and microclimate may adversely affect some taxa (e.g., terrestrial salamanders), but positively affect others (e.g., early successional birds). Salamanders are cited as indicators of ecosystem health because of their sensitivity to forest floor microclimate. We used drift fences with pitfall and funnel traps in a replicated Before-After-Control-Impact design to experimentally assess herpetofaunal community response to initial application of three silvicultural methods proposed to promote oak regeneration: prescribed burning; midstory herbicide; and shelterwood harvests (initial treatment of the shelterwood-burn method) and controls, before and for five years post-treatment. Species richness of all herpetofauna, amphibians, reptiles, frogs, salamanders, or snakes was unaffected by any treatment, but lizard species richness increased in the shelterwood harvest. Capture rate of total salamanders decreased post-harvest in shelterwood units after a 2–3 year delay; Plethodon teyahalee decreased post-harvest in shelterwoods, but also in control units. In contrast, capture rate of total lizards and Plestiodon fasciatus increased in shelterwood stands within the first year post-harvest. Prescribed burn and midstory herbicide treatments did not affect any reptile or amphibian species. A marginally lower proportion of juvenile to adult P. teyahalee, and a higher proportion of juvenile P. fasciatus in shelterwood than control units suggested that heavy canopy removal and associated change in microclimate may differentially affect reproductive success among species. Our study illustrates the importance of longer-term studies to detect potential changes in herpetofaunal communities that may not be immediately apparent after disturbances, and highlights the importance of including multiple taxa for a balanced perspective when weighing impacts of forest management activities.

Keywords: Amphibian, Oak ecosystem restoration, Prescribed fire, Reptile, Salamander, Shelterwood harvest

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Greenberg, Cathryn H.; Moorman, Christopher E.; Raybuck, Amy L.; Sundol, Chad; Keyser, Tara L.; Bush, Janis; Simon, Dean M.; Warburton, Gordon S. 2016. Reptile and amphibian response to oak regeneration treatments in productive southern Appalachian hardwood forest. Forest Ecology and Management, Vol. 377: 11 pages.: 139-149.   10.1016/j.foreco.2016.06.023

 


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