期刊
GLOBAL CHANGE BIOLOGY
卷 18, 期 8, 页码 2617-2625出版社
WILEY
DOI: 10.1111/j.1365-2486.2012.02685.x
关键词
global change; organic nitrogen; proteolytic enzymes; soil nitrogen cycle; soil organic-matter decomposition
资金
- National Science Foundation (NSF) [DEB-0743564, DEB-1011479]
- Northeastern States Research Cooperative
- University of Vermont
- University of Maine
- Northern Research Station, USDA Forest Service
- BioCON & B4Warmed: DOE-BER National Institute for Climate Change Research
- NSF programs in Biocomplexity, Long-term Ecological Research (LTER)
- HFN: NSF Faculty Early Career Development Award
- Directorate For Geosciences
- Office of Polar Programs (OPP) [1107707] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [1021559, 1011479, 1026843, 0743564] Funding Source: National Science Foundation
Nitrogen regulates the Earth's climate system by constraining the terrestrial sink for atmospheric CO2. Proteolytic enzymes are a principal driver of the within-system cycle of soil nitrogen, yet there is little to no understanding of their response to climate change. Here, we use a single methodology to investigate potential proteolytic enzyme activity in soils from 16 global change experiments. We show that regardless of geographical location or experimental manipulation (i.e., temperature, precipitation, or both), all sites plotted along a single line relating the response ratio of potential proteolytic activity to soil moisture deficit, the difference between precipitation and evapotranspiration. In particular, warming and reductions in precipitation stimulated potential proteolytic activity in mesic sites temperate and boreal forests, arctic tundra whereas these manipulations suppressed potential activity in dry grasslands. This study provides a foundation for a simple representation of the impacts of climate change on a central component of the nitrogen cycle.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据