Journal
RESTORATION ECOLOGY
Volume 26, Issue 1, Pages 165-173Publisher
WILEY
DOI: 10.1111/rec.12540
Keywords
forest birds; Hakalau Forest National Wildlife Refuge; Hawai'i; koa; reforestation
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Funding
- U.S. Geological Survey Science Support Program
- U.S. Fish and Wildlife Inventory and Monitoring Program
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Deforestation of tropical forests has led to widespread loss and extirpation of forest bird species around the world, including the Hawaiian Islands which have experienced a dramatic loss of forests over the last 200-800 years. Given the important role birds play in forest ecosystem functions via seed dispersal and pollination, a bird community's response to forest restoration is an important measure of the success of such conservation actions. We evaluated the bird response to reforestation at an important bird sanctuary, Hakalau Forest National Wildlife Refuge, Hawaii Island, using 26 years of bird count data. We show that most species from within the diverse avian community increased significantly, but species colonized the restoration forest at different rates. Distance from intact forest and time since restoration were both important predictors of colonization rate, interacting such that for most species it took more time to colonize areas farther from the intact forest. In addition, both forest cover and understory diversity helped to explain bird densities, but the effect varied among species, suggesting that different habitat requirements may help drive variation in colonization rates. This article provides the first detailed evaluation of how a diverse community of birds has responded to one of the largest, ongoing reforestation projects in Hawaii.
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