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首页> 外文期刊>The Wilson Bulletin >RED-COCKADED WOODPECKER FORAGING BEHAVIOR IN RELATION TO MIDSTORY VEGETATION
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RED-COCKADED WOODPECKER FORAGING BEHAVIOR IN RELATION TO MIDSTORY VEGETATION

机译：红头啄木鸟的觅食行为与植被的关系

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摘要

Red-cockaded Woodpeckers (Picoides borealis) nest and forage in pine-dominated forests. Research indicates that substantial hardwood midstory encroachment is detrimental to Red-cockaded Woodpecker populations, although the exact mechanisms are unknown. We examined foraging behavior in relation to midstory between August 1989 and February 1990. Red-cockaded Woodpeckers foraged at greater heights in areas of taller and denser midstory in the loblolly-shortleaf pine (Pinus taeda and P. echinata, respectively) habitat, but not in longleaf pine (P. palustris) habitat with less-developed midstory vegetation than typical of loblolly-shortleaf pine habitat. In addition, Red-cockaded Woodpeckers concentrated foraging activities in or adjacent to forest stands or openings with reduced midstory vegetation. Overall, Red-cockaded Woodpeckers foraged disproportionately at heights and sites that minimized their exposure to dense midstory conditions. These results suggest that ecosystem management, preferably using prescribed fire, that reduces midstory vegetation will improve foraging habitat for Red-cockaded Woodpeckers.
机译：红冠啄木鸟（Picoidesborealis）在松树为主的森林中筑巢和觅食。研究表明，尽管确切的机制尚不清楚，但大量硬木中间层的侵害对赤壳啄木鸟种群是有害的。我们研究了1989年8月至1990年2月间与中层林有关的觅食行为。红ock啄木鸟在火炬松-短叶松树（分别为松果树和紫锥菊）栖息地的较高和较密实的中层树丛中觅食的高度较高，但没有在长叶松（P. palustris）生境中，中层植被比典型的矮叶-短叶松生境少。此外，红胸啄木鸟在林分或中间植被减少的林分或开口处或附近进行觅食活动。总体而言，红凤头啄木鸟在高处和觅食的地方成比例地觅食，这使它们在密集的中层环境下的接触减至最少。这些结果表明，生态系统的管理，最好是使用规定的火种，减少中层植被，将改善红冠啄木鸟的觅食栖息地。

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