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首页> 外文期刊>Bird conservation international >Establishing quantitative habitat targets for a 'Critically Endangered' Neotropical migrant (Golden-cheeked Warbler Dendroica chrysoparia) during the non-breeding season
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Establishing quantitative habitat targets for a 'Critically Endangered' Neotropical migrant (Golden-cheeked Warbler Dendroica chrysoparia) during the non-breeding season

机译：为非繁殖季节的“极度濒危”新热带移民（金颊柳莺Dendroica chrysoparia）建立定量生境目标

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摘要

The Golden-cheeked Warbler Dendroica chrysoparia is a federally endangered Neotropical migrant that inhabits montane pine-oak forests in Mexico and northern Central America during the non-breeding season. Although it is known that Golden-cheeked Warblers are closely associated with 'encino' oaks (evergreen or holm oak) such as Quercus sapotifolia, Q. eliptica and Q. elongata, which have shiny, narrow, elliptical, or oblong leaves, quantitative habitat targets are useful for effectively incorporating this information into conservation planning and forest management practices. We analysed data on wintering Golden-cheeked Warblers collected during the non-breeding season in Honduras from 1996 to 1998 to identify quantitative targets for habitat conditions for this species. Data on warbler abundance were collected using line transect surveys located in montane pine-oak forests in a stratified-random fashion. Habitat data were collected at five 0.04 ha plots on these same transects and the averaged values used as predictors of Golden-cheeked Warbler abundance. We found that Golden-cheeked Warblers were strongly associated with the basal area of encino oaks and density of 'roble' oaks, such as Q. segoviensis, Q. purulhana and Q. rugosa, which have large, lobed leaves. Density of Golden-cheeked Warblers peaked at?5.6 m~2 ha~(-1) basal area of encino and roble oaks ha~(-1). These values can be used to identify quantitative habitat targets that can be directly incorporated into forest management practices to ensure that these activities maintain habitat conditions necessary for their use by Golden-cheeked Warblers.
机译：金黄色的莺莺金雀科是联邦濒危的新热带移民，在非繁殖季节居住在墨西哥和中美洲北部的山地松橡树林中。尽管众所周知，金颊莺与“恩西诺”橡树（常绿或圣栎）紧密相关，例如栎木栎，栎和长叶栎，它们的叶子有光泽，狭窄，椭圆形或长方形，栖息地定量目标对于将这些信息有效地纳入保护规划和森林管理实践非常有用。我们分析了1996年至1998年在洪都拉斯非繁殖季节收集的越冬金颊莺的数据，以确定该物种栖息地条件的定量目标。分布在山地松栎森林中的线样调查以分层随机的方式收集了莺的丰度数据。在这些相同的样带上的五个0.04公顷样地上收集了栖息地数据，并将这些平均值用作金颊莺种群数量的预测指标。我们发现，金颊莺与恩西诺栎的基础面积和“不锈”橡树的密度密切相关，例如塞戈维亚Q.，普罗汉娜Q和皱叶Q. rugosa，它们有大的叶状叶。金颊莺的密度在恩西诺和橡树ha〜（-1）的基部面积达到5.6 m〜2 ha〜（-1）。这些值可用于确定定量栖息地目标，这些目标可直接纳入森林管理实践中，以确保这些活动维持金颊莺使用它们所必需的栖息地条件。

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