Collaborative Research: Disturbance, Succession, and Nutrient Availability: Patterns, Mechanisms, Interactions

合作研究：干扰、演替和养分可用性：模式、机制、相互作用

基本信息

批准号：
0716852
负责人：
Peter Vitousek
金额：
$ 15.41万
依托单位：
Stanford University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2007
资助国家：
美国
起止时间：
2007-09-01 至 2010-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0716852&HistoricalAwards=false
关键词：
Collaborative Research Disturbance Succession Nutrient

项目摘要

The causes and consequences of disturbance and recovery in tropical forests are poorly known, due in large part to the lack of annual tree rings and the sparseness of long-term observations in most tropical forests. This study combines novel remote sensing technologies with careful reconstructions of forest history to understand disturbance and recovery in rain forests that differ substantially in climate and soil fertility across the Hawaiian Islands. High-precision remote measurements will yield a detailed and very broad-scale view of the structure and chemistry of these forests, and this information will be used to identify patterns of disturbance and recovery across landscapes. These patterns will be checked and refined using on-the-ground measurements of site histories (based on pollen profiles dated using lead isotopes), soil fertility, and biological diversity. Tropical forests contribute substantially to carbon fluxes from terrestrial ecosystems, to climate, and to many other aspects of global biogeochemistry and diversity. Their dynamics are known to depend strongly upon their disturbance regimes, which in turn depend on differences among tropical forests in climate and soil fertility. The interplay between remote and on-the-ground measurements proposed here should yield new information on the dynamics of Hawaiian forests; should identify mechanisms that also operate (with modifications) in more complex continental tropical forests; and should provide new tools for understanding the dynamics of forests everywhere

热带森林中干扰和恢复的原因和后果是鲜为人知的，这在很大程度上是由于每年缺乏每年的树环以及大多数热带森林中长期观察的稀疏性。这项研究结合了新型的遥感技术和仔细的森林历史重建，以了解雨林的干扰和恢复，这些雨林在整个夏威夷群岛的气候和土壤肥力上有很大不同。高精度的远程测量将对这些森林的结构和化学产生详细且非常广泛的视野，这些信息将用于识别跨景观的干扰和恢复模式。这些模式将使用现场历史的现场测量（基于使用铅同位素的花粉剖面），土壤肥力和生物多样性来检查和完善。热带森林对从陆地生态系统，气候以及全球生物地球化学和多样性的许多其他方面的碳通量做出了重大贡献。已知它们的动力在很大程度上取决于它们的干扰方案，这又取决于气候和土壤生育中热带森林之间的差异。此处提出的遥远和地面测量之间的相互作用应产生有关夏威夷森林动态的新信息；应确定在更复杂的大陆热带森林中（修改）也（修改）的机制；并应该提供新的工具，以理解各地森林的动态