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Phylogeny of the Diatom Stephanodiscus yellowstonensis

黄石硅藻的系统发育

基本信息

批准号：
9107278
负责人：
Edward Theriot
金额：
$ 37.76万
依托单位：
Academy of Natural Sciences Philadelphia
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1992
资助国家：
美国
起止时间：
1992-01-15 至 1996-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9107278&HistoricalAwards=false
关键词：
Phylogeny Diatom Stephanodiscus yellowstonensis

项目摘要

A single celled alga, (the diatom Stephanodiscus yellowstonensis) originated in Yellowstone Lake, Wyoming from about 12,000 to 8,000 years ago, apparently from its nearest relative, S. niagarae which lives in nearby lakes. The significance of the research goes far beyond a detailed description of diatom speciation. The proposed research speaks to a broad range of questions from factors controlling origin of new species to global climate change. The project integrates 3 lines of evidence: paleontological, morphological, and genetic. Sediment records from some of the largest high altitude lakes in the world (Yellowstone Lake and Jackson Lake in northwestern Wyoming and a series of lakes between them) will be collected. From these sediment records a detailed record of regional climatic change (using pollen, diatoms, oxygen isotope, grain size and other features as available) will be obtained. The information will be compared to an extraordinarily well detailed and CONTINUOUS record of this new species within a 4,000 year period (the early Holocene, a time of significant global warming). Among other results, we expect to obtain a detailed record of change in species as a response to entire ecosystem change in response to global warming. This study will help serve as a basis for predicting changes in the earth's biota in response to possible future global change, anthropogenic and/or natural.

一种单细胞硅藻（Stephanodiscus yellowstonensis）起源于黄石湖，怀俄明州从大约12,000到8000 年前，显然是从它最近的亲戚，S。尼亚加拉河，生活在附近的湖泊里这项研究的意义深远除了详细描述硅藻物种形成之外拟议研究涉及广泛的问题，控制新物种的起源和全球气候变化。的该项目整合了3条证据线：古生物学，形态学和遗传学。一些沉积物记录世界上最大的高海拔湖泊（黄石湖和怀俄明州西北部的杰克逊湖和一系列湖泊之间）将被收集。从这些沉积物记录中，区域气候变化的记录（使用花粉、硅藻、氧气同位素、粒度和其他可用特征）将被得到了这些信息将被与一个这一新物种的详细和连续的记录， 4,000年（全新世早期，全球重要的时间）暖）。在其他结果中，我们希望获得详细的物种变化的记录，作为对整个生态系统的反应应对全球变暖。这项研究将有助于作为预测地球生物群变化的基础未来可能的全球变化，人为的和/或自然的。