DISSERTATION RESEARCH: Disentangling the influence of functional similarity on patterns of species abundance in tree communities

论文研究：阐明功能相似性对树木群落物种丰度模式的影响

• 批准号: 1501341
• 负责人: Nathan Swenson
• 金额: $ 1.98万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1501341&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Disentangling; influence; functional

Tropical forests harbor a remarkable level of biodiversity characterized by an exceptional number of rare species and few dominant species. Human and natural disturbances are increasingly threatening the condition of these forests and with it, their benefits to human well-being. Disentangling the causes of species relative abundance constitutes a critical step in order to protect, maintain and predict the fate of biodiversity. By studying within-species trait variation and individual growth of 650 individual trees from six species broadly distributed throughout Puerto Rico, this project will determine how functional traits influence tree species diversity. The resulting insights from this research will help to foster decisions devoted to preventing biodiversity loss in tropical forests. Further, this project will support training for science students as well as outreach efforts via public talks encouraging young people to pursue career in tropical ecology. Identifying the ecological forces that underlie species relative abundances has been a lingering challenging in ecology. One potential explanation for this pattern is based on the idea that species have differential abilities to exploit resources heterogeneously distributed in the space and time. This ability is expected to be strongly associated with different attributes that affect the performance of individuals and ultimately their distribution and abundance. This study focuses on understanding how organismal traits influence patterns of species relative abundance. The relationship between organismal function and performance will be evaluated using in a spatially explicit context. Methods will include measuring the growth and traits of individual trees for six species distributed along an altitudinal gradient in Puerto Rico. The proposed research will expand our knowledge of the ecological mechanisms underlying patterns of species relative abundance by considering not only species identities but also trait information. Results from this project will have direct implications for natural resource management.

热带森林具有显著的生物多样性水平，其特点是稀有物种数量异常多，优势物种很少。人为和自然干扰日益威胁这些森林的状况，并随之威胁到森林对人类福祉的好处。弄清物种相对丰富的原因是保护、维持和预测生物多样性命运的关键一步。通过研究广泛分布在波多黎各的6个树种的650棵树的种内性状变异和个体生长，该项目将确定功能性状如何影响树种多样性。从这项研究中得出的见解将有助于促进致力于防止热带森林生物多样性丧失的决策。此外，该项目还将支持对理科学生的培训，并通过公开讲座鼓励年轻人从事热带生态学职业。确定物种相对丰度背后的生态力量一直是生态学中一个挥之不去的挑战。对这种模式的一种可能的解释是基于这样一种观点，即物种具有不同的能力来利用在空间和时间上不均匀分布的资源。预计这种能力与影响个体表现并最终影响其分布和丰度的不同属性密切相关。这项研究的重点是了解生物体特征如何影响物种相对丰度的模式。有机体功能和性能之间的关系将在空间上明确的背景下使用进行评估。方法将包括测量生长和性状的个别树木分布沿着海拔梯度在波多黎各的六个物种。拟议的研究将扩大我们的知识的生态机制的物种相对多度的模式，不仅考虑物种的身份，但也性状信息。该项目的成果将对自然资源管理产生直接影响。