Resource Competition Theory: The Link between Climate Change and Diatom Sedimentary Assemblages in the YellowstoneEcosystem

资源竞争理论：气候变化与黄石生态系统硅藻沉积组合之间的联系

基本信息

批准号：
9407377
负责人：
Susan Kilham
金额：
$ 32.5万
依托单位：
Drexel University
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：
1994-11-15 至 1999-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407377&HistoricalAwards=false
关键词：
Resource Competition Theory Link between

项目摘要

9407377 Kilham This research addresses one of the major concerns of the ecological agenda: the relationship of climate change to the structure, function and survival of ecological communities. The objectives of the study are (1) to characterize the physiological responses of the eight dominant diatom species from selected lakes of the Yellowstone National Park region to temperature, light, silicon, phosphorus, and nitrogen, (2) to determine the relative competitive abilities of the species, and (3) to perform field studies on the abundances and relative competitive abilities of the species. A set of lacustrine sedimentary records, coupled with active and intense investigations on landscape, climatic and limnological changes underway in Yellowstone ecosystems, provides an unparalleled opportunity to incorporate resource competition theory with field observations on diatom assemblages, evolution and extinction. This study will integrate the predictions and results based on resource competition theory with observations with changes in the structure of diatom assemblages in the lakes of the Yellowstone Region to explain the present diatom distributions and to test the causal factors proposed to explain diatom distributions over the Holocene. %%% This research provides a strong causal linkage between limnology and process-oriented physiological ecology to acquire information necessary for a detailed interpretation of the paleorecord and a firm basis for developing landscape-level transfer functions that will lead to fine-scale climate reconstructions.

9407377 Kilham这项研究解决了生态议程的主要关注点：气候变化与生态社区的结构，功能和生存的关系。该研究的目的是（1）表征从黄石国家公园地区选定的湖泊中八个主要硅藻物种到温度，光，硅，磷和氮的生理反应，（2）确定物种的相对竞争能力，以及（3）以对物种的丰度和相对竞争能力进行现场研究。一组湖泊沉积记录，加上黄石生态系统中的景观，气候和林理学变化的积极和严格的研究，为将资源竞争理论与硅藻组合，进化和灭绝的现场观察结合在一起提供了无与伦比的机会。这项研究将将基于资源竞争理论的预测和结果与观察结果结合在一起，并随着黄石区域湖泊中硅藻组合结构的变化，以解释当前的硅藻分布，并测试提出的因果因素，以解释全新世上的硅藻分布。 %% %%这项研究提供了羊水学和面向过程的生理生态学之间的牢固因果关系，以获取对古rocord的详细解释所需的信息，以及开发景观级别转移功能的牢固基础，这将导致高规模的气候重建。