|Bolton, H., Jr. - BATTELLE PNW LABORATORY|
Submitted to: Microbial Ecology International Symposium
Publication Type: Abstract Only
Publication Acceptance Date: February 15, 2001
Publication Date: N/A
Technical Abstract: Climate change will alter the N cycling in the fragile soils of the semi- arid desert region possibly causing changes in structure and function. The study was conducted to determine the effect of climate change on N cycling processes in a shrub steppe ecosystem. We used 15N to trace N into plants, microbes and soil organic matter over a climate gradient. There was more N loss at the warmer and drier sites and more plant uptake at the wetter cooler sites. The interaction of climate and N cycling was not linear. The microbial processes related to the cycling of N were more affected by climate than plant competition for N. As the climate becomes warmer this ecosystem will loose N more rapidly and move towards desertification.