Dissertation Research: The Effect of Seed Dispersal by Bats on Population Dynamics of a Canopy Tree in a Spatially Explicit River Meander Landscape

论文研究：蝙蝠传播种子对空间明确的河曲景观中树冠树种群动态的影响

• 批准号: 9901928
• 负责人: Carol Horvitz
• 金额: $ 1.33万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-01 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9901928&HistoricalAwards=false
• 关键词: Dissertation; Research; Effect; Seed; Dispersal

9901928Horvitz & Beck-KingThis study investigates the effects of seed dispersal by bats and river meander succession on the population dynamics of a timber tree, Calophyllum brasiliense, in the Manu Biosphere Reserve of Amazonian Peru. As a river meanders, a system of ridges and depressions develops that creates new open soil areas. A spatially structured landscape may favor a particular type of seed dispersal system. This study will combine field data and modeling to investigate the role of bats as dispersal agents: do they confer advantage by distance (colonization) or by the specificity of seed deposition (directed dispersal)? Field studies will investigate: (1) spatial relationships of habitat types and rate of new habitat creation by the river; (2) recruitment requirements, rates of survival, growth and reproduction of C. brasiliense, in study plots of differing habitat types; (3) seed deposition patterns created by bats, including direct observations and radio telemetry. The benefit that bats provide to large-seeded tropical tree species has never been thoroughly studied, even though many large-seeded tropical trees depend on bats to disperse their seeds. Tropical rainforest dynamics driven by river meanders have received much less study than tree-fall gap dynamics, although river meanders may be a predominant cause of successional processes throughout the Amazon basin. Understanding dispersal, recruitment and demography of C. brasiliense will have applications to its exploitation as a sustainable timber resource.

9901928霍维茨贝克-金这项研究调查的影响，种子传播蝙蝠和河流曲流演替的木材树，红厚壳巴西，在亚马逊秘鲁的马努生物圈保护区。当河流蜿蜒时，一个山脊和洼地系统的发展创造了新的开放土壤区域。空间结构的景观可能有利于特定类型的种子传播系统。本研究将结合联合收割机的现场数据和建模调查蝙蝠作为传播媒介的作用：他们赋予优势的距离（殖民化）或种子沉积的特异性（定向传播）？ 实地研究将调查：（1）栖息地类型的空间关系和河边新生境的形成率;（3）蝙蝠产生的种子沉积模式，包括直接观察和无线电遥测。 蝙蝠为大种子热带树种提供的好处从未被彻底研究过，尽管许多大种子热带树木依赖蝙蝠传播种子。虽然河流曲流可能是整个亚马逊流域演替过程的主要原因，但由河流曲流驱动的热带雨林动力学的研究却比树木凋落间隙动力学少得多。了解C. brasiliense将作为一种可持续的木材资源用于开发。