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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (1) Types Citation (1) Contacts Del Grosso, Stephen King, Jennifer Y LeCain, Daniel R Milchunas, Daniel G Morgan, Jack A More... Categories Publication (1) View Results as: JSON ATOM CSV

Elevated atmospheric CO 2 effects and soil water feedbacks on soil respiration components in a Colorado grassland The shortgrass steppe is a semi-arid grassland, where elevated CO2 reduces stomatal conductance and promotes soil moisture storage. Enhanced biomass growth from elevated CO2 has been attributed in part to soil moisture effects. However, the influence of this soil moisture feedback on C cycling has received little attention. We used open-top chambers to increase atmospheric CO2 concentrations to twice-ambient for four growing seasons. Soil respiration rates and stable C isotopes of soil CO2 were measured during the third and fourth seasons. Elevated CO2 increased soil respiration rates by ?25% in a moist growing season and by ?85% in a dry season. Stable C isotope partitioning of soil respiration into its components... Categories: Publication; Types: Citation, Journal Citation; Tags: 12, 13, American Geophysical Union, C, C/, All tags... Global Biogeochemical Cycles, decomposition, rhizosphere respiration, shortgrass steppe, soil C cycling, stable isotopes, Fewer tags