Belowground responses to rising atmospheric CO2: implications for plants, soil biota, and ecosystem processes
As atmospheric CO2 increases there will almost certainly be alterations in soil carbon fluxes. It is likely that such alterations will be accompanied by changes in the partitioning of carbon between organic structures and to soil processes. These changes have the potential for further altering the structure and function of terrestrial ecosystems. While there has been increasing recognition of the importance of soil-mediated responses to global climate change, the nature and magnitude of these responses are not well understood. In an effort to expand our assessment of the significance of belowground responses to rising atmospheric CO2, a workshop has been organized that resulted in the peer-reviewed contributions that are contained in this volume.
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Issues and perspectives for investigating root responses to elevated atmospheric carbon dioxide
Root response to C02 enrichment and nitrogen supply in loblolly pine
Vertical and lateral root distribution patterns
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allocation ambient CO2 availability Bazzaz belowground C4 grasses carbon dioxide chamber climate change CO2 concentrations CO2 effects CO2 efflux CO2 enrichment CO2 treatments colonization rates day harvest decomposition density Ecol ecosys ecosystem ectomycorrhizae effects of CO2 effects of elevated elevated atmospheric CO2 elevated CO2 exudation fertilization gracilis greater high CO2 high N increased root interactions lateral roots leaf area lignin litter loblolly pine mass loss measured microbial activity microbial biomass model rhizodeposits mycorrhizal colonization nitrogen nitrogen cycles Norby R J O'Neill E G Oecologia Owensby phosphorus photosynthetic Phytol Pinus Plant and Soil plants grown plots ratio respiration response to CO2 response to elevated rhizosphere root biomass root dry weight root growth root length root system samples significant significantly simulated smithii soil biota soil microbial soil organic matter soil pCO2 soil water species Strain B R tallgrass prairie temperature tion Unfertilized