Effects of Increased Season Length on Plant Phenology, Community Composition, Productivity, and Ecosystem Carbon Fluxes in Alaskan Tundra: Implications for Climate Warming

奥伯鲍尔，斯蒂芬佛罗里达国际大学这个项目是先前研究计划的延伸，该计划旨在调查潜在的全球变暖对北极苔原的影响。这个项目是一个更大的美国的一个组成部分。为国际冻土带实验做出贡献，该实验正在研究全球气候变化对冻土带生长的可能影响。这项研究的结果将有助于协调一致的国际努力，以确定气候变暖是否会导致从冻土带进入大气的二氧化碳通量增加。这个特殊项目对国际项目的贡献是研究气候变暖对生长季节长度的影响。较长的生长季节可能是由于气候变暖以及冻土带根系碳吸收的增加。这些结果与其他关于气候对冻土带影响的实验结果一起是至关重要的，这样研究人员就可以评估所有可能导致冻土带生态系统因全球变化而发生根本变化的因素。

ABSTRACT OPP-9615845 OBERBAUER, STEPHEN FLORIDA INTERNATIONAL UNIVERSITY This project is an extension of a previous research program to investigate the effects of potential global warming on Arctic tundra. This project is one component of a larger US. effort to contribute to the International Tundra Experiment that is examining the possible impact of global climate change on tundra growth. The results of this research will contribute to a coordinated international effort to determine if a warming climate will result in an increase in carbon dioxide flux from the tundra into the atmosphere. The contribution of this particular project to the international program is to look at the effect of climate warming on the length of the growing season. A longer growing season could result from a warmer climate and a concomitant increase in carbon uptake in the tundra root system. These results are critical to consider along with other experimental results on climate impacts on the tundra so that researchers may be able assess all of the factors that could lead to fundamental changes in the tundra ecosystem as a result of global change.