Response of microbial community composition and function to soil climate change.

摘要: Soil microbial communities mediate critical ecosystem carbon and nutrient cycles. How will respond to changes in vegetation climate, however, are not well understood. We reciprocally transplanted soil cores from under oak canopies adjacent open grasslands a California oak-grassland determine how the environment potential consequences for cycling of carbon. Every 3 months up 2 years, we monitored community composition using phospholipid fatty acid analysis (PLFA), biomass, respiration rates, enzyme activities, activity groups by quantifying (13)C uptake universal substrate (pyruvate) into PLFA biomarkers. grassland experienced higher maximum temperatures lower water content than canopies. were more sensitive environmental change those grassland. Oak canopy changed rapidly when environment, but did environment. Similarly, decreased soils These data support hypothesis that function is altered microbes exposed new extremes conditions; is, conditions outside their "life history" envelopes.