CRB: Restoring Seasonal Tropical Forests in Mexico: Using Designer Communities to Direct Succession

CRB：恢复墨西哥季节性热带森林：利用设计师社区指导继承

基本信息

批准号：
9981607
负责人：
Edith Allen
金额：
$ 25.15万
依托单位：
University of California-Riverside
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2000
资助国家：
美国
起止时间：
2000-09-01 至 2004-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9981607&HistoricalAwards=false
关键词：
CRB Restoring Seasonal Tropical Forests

项目摘要

9981607AllenThe proposed research follows upon current research on mycorrhizae and ecophysiology of planted trees in seasonal tropical forest. Defining measurable goals for restoration is one of the central issues in restoration ecology, and is especially problematic in species rich and disturbed systems such as seasonal tropical forests. Designer communities will be established to initiate succession in two sites, and measure the feedbacks that developing communities have on 1) ecophysiological characteristics of trees over time, 2) biodiversity of colonizing plant species, 3) mycorrhizal fungal diversity and effects on plant growth, and 4) soil properties. Because of the high beta diversity in tropical forest, the original species composition can not be duplicated, but species with defined ecophysiological characteristics can be selected that may either slow or hasten succession. These characteristics include fast and slow-growing plants, sun and shade plants, large and small-seeded species, drought tolerance, C/N of leaf tissue, wood density, and others. Three kinds of communities will be established, late seral, early seral, and a mix of seral species. Experiments will test the hypothesis that the growth rate and seral status of the managed community will have different feedbacks on community and soil properties. The rate of canopy closure will vary, as will animal seed dispersers and diversity of plant colonization. Overall, this project will provide needed information on the value of designer communities as a mechanism to direct succession and restore native vegetation to degraded tropical lands.

9981607 ALLENTHE提出的研究是在当前对季节性热带森林中种植树木学的菌根和生态生理学的研究之后。定义恢复的可衡量目标是恢复生态学的核心问题之一，在富裕和受干扰的系统（例如季节性热带森林）中尤其有问题。设计师社区将建立以在两个地点启动继任，并衡量发展社区对1）随着时间的流逝的生态生理特征的反馈，2）殖民植物物种的生物多样性，3）菌根真菌多样性和对种植的影响以及4）土壤特性。由于热带森林中的β多样性很高，因此无法重复原始物种组成，但是可以选择具有生态生理特征的定义的物种可能会缓慢或促进继承。这些特征包括快速，生长缓慢的植物，阳光和阴影植物，大和小种子的物种，干旱耐受性，叶片组织的C/N，木质密度等。将建立三种社区，即晚期，早期的Seral和Seral物种的混合物。实验将检验以下假设：托管社区的增长率和静脉状况将对社区和土壤特性产生不同的反馈。冠层闭合率将有所不同，动物种子分散剂和植物定植的多样性也会有所不同。总体而言，该项目将提供有关设计师社区价值的所需信息，以作为将继承和恢复本地植被降低的热带土地的机制。