Avian Conservation and Ecology | |
Stand and within-stand factors influencing Golden-winged Warbler use of regenerating stands in the central Appalachian Mountains | |
Jeffery L Larkin,1  Benjamin C Jones,2  Brian W Smith,3  Marja H Bakermans,4  | |
[1] Indiana University of Pennsylvania;Pennsylvania Game Commission;U.S. Fish and Wildlife Service;Worcester Polytechnic Institute | |
关键词: forest regeneration; l; scape; Maryl; Pennsylvania; silviculture; Vermivora chrysoptera; young forest; | |
DOI : 10.5751/ACE-00747-100110 | |
学科分类:社会科学、人文和艺术(综合) | |
来源: Resilience Alliance Publications | |
【 摘 要 】
The Golden-winged Warbler (Vermivora chrysoptera) is currently being considered for protected status under the U.S. Endangered Species Act. The creation of breeding habitat in the Appalachian Mountains is considered a conservation priority for this songbird, which is dependent on extensively forested landscapes with adequate availability of young forest. We modeled abundance of Golden-winged Warbler males in regenerating harvested forest stands that were 0-17 years postharvest at both mid-Appalachian and northeast Pennsylvania regional scales using stand and within-stand characteristics of 222 regenerating stands, 2010-2011. Variables that were most influential at the mid-Appalachian scale were different than those in the northeast region. Across the mid-Appalachian ecoregion, the proportion of young forest cover, i.e., shrub/scrub cover, within 1 km of regenerating stands best explained abundance of Golden-winged Warblers. Golden-winged Warbler response was best explained by a concave quadratic relationship in which abundance was highest with 5-15% land in young forest cover. We also found evidence that the amount of herbaceous cover, i.e., the amount of grasses and forbs, within a regenerating stand positively influenced abundance of Golden-winged Warblers. In northeastern Pennsylvania, where young forest cover is found in high proportions, the distance to the nearest regenerating stand best explained variation in abundance of Golden-winged Warblers. Abundance of Golden-winged Warblers was <1 male per survey when another regenerating stand was >1500 m away. When modeling within-stand features in the northeast region, many of the models were closely ranked, indicating that multiple variables likely explained Golden-winged Warbler response to within-stand conditions. Based on our findings, we have proposed several management guidelines for land managers interested in creating breeding habitat for Golden-winged Warblers using commercial timber operations. For example, we recommend when managing for Golden-winged Warblers in the central Appalachian Mountains that managers should strive for 15% young forest in a heavily forested landscape (>70% forest cover) and cluster stands within 1-2 km of other young forest habitats.
【 授权许可】
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RO201902019686983ZK.pdf | 918KB | download |