LTREB: Fourteen years of simulated climate change in ancient limestone grassland: linking the responses of genotypes, species, and ecosystems

LTREB：十四年模拟古代石灰岩草原气候变化：将基因型、物种和生态系统的响应联系起来

基本信息

批准号：
0716360
负责人：
Jason Fridley
金额：
$ 44.79万
依托单位：
Syracuse 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 2012-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0716360&HistoricalAwards=false
关键词：
LTREB Fourteen years simulated climate

项目摘要

In this project, vegetation scientists seek to understand the long-term impacts of climate change on grassland ecosystems. Through multi-decadal simulation of warmed soil and air temperatures, coupled with summer drought or elevated rainfall, researchers are identifying how the characteristics of different plant species allow predictions of how communities and ecosystem processes will shift in coming decades. This project also extends research on climate change impacts to the genetic level, where recent evidence indicates that some ecosystems may be resistant to climate change because some species have a large local gene pool allowing rapid adaptation to new environments.Temperate grasslands are a key contributor to global productivity and their response to global climate change is of critical importance to the future of human welfare. Existing studies from fertile grasslands have documented rapid vegetation shifts with simulated warming, but there is reason to believe that certain grasslands - those of less fertile soils, containing slower-growing species that are more diverse locally - may be more resistant to rapid climate change. Because these systems account for a large majority of pasture and rangelands throughout the world, their recalcitrance to climate shifts will have significant ramifications for the future of food and fiber production.

在这个项目中，植被科学家试图了解气候变化对草原生态系统的长期影响。通过对温暖的土壤和空气温度的多年模拟，再加上夏季干旱或降雨升高，研究人员正在确定不同植物物种的特征如何允许预测未来几十年的社区和生态系统过程将如何变化。该项目还将对气候变化影响的研究扩展到遗传水平，最近的证据表明，某些生态系统可能对气候变化具有抵抗力，因为某些物种具有较大的本地基因库，可以快速适应新环境。人们对全球生产力及其对全球气候变化的反应对人类保健的未来至关重要。肥沃草原的现有研究证明了通过模拟变暖的快速植被转移，但是有理由相信某些草原 - 肥沃的土壤较少的土壤，含有较慢的种植物种，在本地较为多样化，可能对快速气候变化具有更大的抵抗力。由于这些系统占世界各地的大部分牧场和牧场，因此它们对气候转变的顽固性将对粮食和纤维生产的未来产生重大影响。