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

9407377基勒姆这项研究解决了生态议程的主要关切之一：气候变化与生态群落的结构、功能和生存的关系。本研究的目的是(1)研究黄石国家公园湖泊中8种优势硅藻对温度、光照、硅、磷和氮的生理反应；(2)确定该物种的相对竞争能力；(3)对该物种的丰度和相对竞争能力进行实地研究。一系列湖泊沉积记录，加上对黄石生态系统正在进行的景观、气候和湖泊变化的积极和紧张的调查，提供了一个将资源竞争理论与关于硅藻组合、演化和灭绝的实地观察相结合的无与伦比的机会。本研究将把基于资源竞争理论的预测和结果与观测和黄石地区湖泊硅藻组合结构的变化相结合，以解释目前硅藻的分布，并检验提出的解释全新世硅藻分布的原因。这项研究在湖沼学和面向过程的生理生态学之间提供了强有力的因果联系，以获取详细解释古记录所需的信息，并为开发导致精细气候重建的景观水平传递函数奠定了坚实的基础。

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.