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ASSESSING THE EFFECTS OF GLOBAL CLIMATE CHANGE ON THE PRODUCTION AND MORTALITY OF DOUGLAS FIR FINE ROOTS USING MINIRHIZOTRONS
Citation:
Johnson, M G., P T. Rygiewicz, D T. Tingey, AND D L. Phillips. ASSESSING THE EFFECTS OF GLOBAL CLIMATE CHANGE ON THE PRODUCTION AND MORTALITY OF DOUGLAS FIR FINE ROOTS USING MINIRHIZOTRONS. Presented at 6th International Symposium on Root Research, Nagoya Japan, November 11-16, 2001.
Description:
Fine roots (roots 2 mm in diameter) are one of the principal absorptive surfaces for water and nutrients in terrestrial plants. As such they are vital for plant growth and survival, while their turnover serves as a primary mechanism for carbon addition to soil. Little is known about the effects of global climate change (elevated CO2 and and any associated change in temperature) on the production and mortality (turnover) of fine roots. To study the effects of global climate change on fine roots we selected Douglas fir (Pseudotsuga menzesii Mirb., Franco), an important Pacific Northwest (PNW) USA forest species, and conducted a 4-year study of the effects of elevated CO2 and temperature.