DISSERTATION RESEARCH: Do mesoherbivores drive Neotropical rainforest understory insectivorous bird declines by limiting availability of preferred foraging microhabitat?

论文研究：中食草动物是否通过限制首选觅食微生境的可用性而导致新热带雨林林下食虫鸟类的减少？

基本信息

批准号：
1010952
负责人：
Thomas Sherry
金额：
$ 1.49万
依托单位：
Tulane University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2010
资助国家：
美国
起止时间：
2010-05-01 至 2012-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1010952&HistoricalAwards=false
关键词：
DISSERTATION RESEARCH Do mesoherbivores drive

项目摘要

Tropical birds are highly vulnerable to forest fragmentation, and declines are often attributed to the direct effects of decreased habitat size. However these birds have nearly disappeared from some large forest fragments, but persist in smaller nearby reserves. Mechanisms other that habitat size proposed to account for these declines (food-limitation, dispersal-limitation and nest predation) also fail to explain the puzzling patterns observed in several tropical forests. The proposed research investigates a new, alternative hypothesis to account for bird declines in large habitat patches that has three key components: (1) understory insectivorous birds prefer to forage in dense woody vines called lianas; (2) collared peccaries suppress liana densities, and (3) loss of suitable habitat and, consequently, bird populations correspond with peccary densities. The study will test the three components of this hypothesis in central Panama, where both focal bird populations and lianas have increased while peccary densities remain low.Results from this project have immediate conservation applications in reserves across Central America. The graduate student involved is bilingual and plans to engage local land owners and managers in Panama in the project. Outreach to local communities will include bird identification and bird banding demonstrations. Undergraduate students from groups typically underrepresented in science will also be trained through participation in this research.

热带鸟类高度容易受到森林破碎的影响，而下降通常归因于栖息地尺寸减少的直接影响。但是，这些鸟几乎从一些大森林碎片中消失了，但在附近的储量较小。机制的机制其他提议说明这些下降的栖息地大小（食物限制，分散限制和巢捕食）也无法解释几个热带森林中观察到的令人困惑的模式。拟议的研究调查了一个新的，替代性的假设，以说明具有三个关键组成部分的大型栖息地斑块中的鸟类下降：（1）林下的昆虫鸟类更喜欢在称为lianas的茂密木本藤蔓中觅食；（2）领取的peccaries抑制了LIANA密度，（3）丧失了合适的栖息地，因此，鸟类种群与宫颈密度相对应。该研究将在巴拿马中部测试该假设的三个组成部分，在该假设中，焦点鸟类种群和叶植物都增加了，而宫颈密度保持较低。该项目的分析在中美洲的储量中立即提供了保护应用。参与的研究生是双语的，并计划与巴拿马的当地土地所有者和经理参与该项目。向当地社区的宣传将包括鸟类识别和鸟类带示威。通常在科学领域代表性不足的小组的本科生也将通过参与这项研究来接受培训。