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LTREB: Long-term Population Ecology of Canopy and Emergent Trees in a Neotropical Rain Forest

LTREB：新热带雨林树冠和挺水树木的长期种群生态学

基本信息

批准号：
9407581
负责人：
Deborah Clark
金额：
$ 29.49万
依托单位：
University of Missouri-Saint Louis
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1994
资助国家：
美国
起止时间：
1994-08-15 至 1999-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407581&HistoricalAwards=false
关键词：
LTREB Long term Population Ecology

项目摘要

9407581 Clark Lowland tropical rain forests contain a substantial part of the planet's above-ground carbon and are the richest terrestrial habitats in plant and animal species. In spite of their global importance and rapid rates of tropical deforestation, surprisingly little is known about the basic ecology of the largest organisms in these forests, the canopy trees. This project will extend the longest running investigation on annually-measured growth, mortality, and tree microenvironment for tropical rain forest trees. The study is located in one of the world's most active centers for tropical rain forest research, the La Selva Biological Station in Costa Rica. Results from the first 11 years of study have led to new insights into the ecology of tropical rain forest trees. Multiple regeneration patterns are apparent. The great dynamism of these forests causes high rates of physical damage to young trees. The vast majority of young trees occupy very dark microenvironments, frequently passing years with no growth. Small increases in light, as cause by the fall of a nearby canopy tree, have important effects on saplings' performance and survival. Substantial differences in annual growth occur concurrently across species, indicating the pervasive impact of short-term climatic variation on the productivity of the forest as a whole. Data from this project are providing a unique understanding of the ecology of canopy trees in tropical rain forest.

9407581克拉克低地热带雨林含有地球地面碳的很大一部分，是动植物物种最丰富的陆地栖息地。尽管它们在全球具有重要意义，而且热带森林砍伐速度很快，但令人惊讶的是，人们对这些森林中最大的生物--树冠树--的基本生态学知之甚少。该项目将延长每年测量热带雨林树木的生长、死亡和树木微环境的最长时间的调查。这项研究位于世界上最活跃的热带雨林研究中心之一，哥斯达黎加的La Selva生物站。头11年的研究结果使人们对热带雨林树木的生态有了新的见解。多种再生模式明显。这些森林的巨大活力对幼树造成了很高的物理损害率。绝大多数幼树处于非常黑暗的微环境中，经常经过多年而没有生长。附近一棵树冠倒下导致的光照小幅增加，对树苗的表现和存活有重要影响。不同物种的年生长量同时存在显著差异，表明短期气候变化对整个森林生产力的普遍影响。来自该项目的数据提供了对热带雨林树冠树生态的独特理解。