Soil microbial respiration in arctic soil does not acclimate to temperature.

Warming-induced release of CO2 from the large carbon (C) stores in arctic soils could accelerate climate change. However, declines in the response of soil respiration to warming in long-term experiments suggest that microbial activity acclimates to temperature, greatly reducing the potential for enhanced C losses. As reduced respiration rates with time could be equally caused by substrate depletion, evidence for thermal acclimation remains controversial. To overcome this problem, we carried out a cooling experiment with soils from arctic Sweden. If acclimation causes the reduction in soil respiration observed after experimental warming, then it should subsequently lead to an increase in respiration rates after cooling....

Categories: Publication; Types: Citation, Journal Citation; Tags: Acclimatization, Acclimatization: physiology, Analysis of Variance, Arctic Regions, Bacteria, All tags... Bacteria: metabolism, Carbon, Carbon Dioxide, Carbon Dioxide: metabolism, Carbon: metabolism, Ecology letters, Ecosystem, Fungi, Fungi: metabolism, Seasons, Soil, Soil Microbiology, Soil: analysis, Sweden, Temperature, Time Factors, Fewer tags