ISSN: 1578-665X | e-ISSN: 2014-928X An international journal devoted to the study and conservation of animal biodiversity, open-access, free for authors, driven by a fast-paced editorial process that includes assessment by experts. It is published twice a year.

Relative abundance of amphibians in forest canopy gaps of natural origin vs. timber harvest origin

Strojny, C. A.  Hunter, M. L., Jr. 

Abstract

Small-scale canopy gaps created by logging may retain adequate habitat structure to maintain amphibian abundance. We used pitfalls with drift fences to measure relative abundance of amphibians in 44 harvested gaps, 19 natural treefall gaps, and 36 closed-canopy forest plots. Metamorphs had relatively lower capture rates in large harvest gaps for Ambystoma maculatum, Lithobates catesbeianus, L. clamitans, and L. sylvaticus but we did not detect statistically significant (p < 0.1) differences among gap types for Lithobates palustris metamorphs. L. clamitans juveniles and L. sylvaticus juveniles and adults had relatively lower capture rates in large harvest gaps. For juvenile-adult A. maculatum, we caught relatively fewer individuals in all gap types than in closed-canopy areas. Some groups with overall lower capture rates (immature Plethodon cinereus, juvenile L. palustris) had mixed differences among gap types, and Notophthalmus viridescens (efts) and adult P. cinereus showed no differences among gap types. One species, L. clamitans, was captured more often at gap edges than gap centers. These results suggest that harvest gaps, especially small gaps, provided habitat similar to natural gaps for some, but not all, amphibian species or life-stages.

Key words

Amphibians, Forest management, Canopy gaps, Natural disturbance, Irregular group shelterwood

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Índex de Volume 33.1 (2010)

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