Will a breakdown in nutrient cycling limit the long-term response of forested systems to elevated CO[sub 2] and climate change
- Environmental Research Laboratory, Corvallis, OR (United States)
Rising atmospheric CO[sub 2] and climate change may have dramatic effects of forested systems. Under elevated CO[sub 2] most forest species increase their allocation of C to roots to acquire additional resources for growth. A large portion of photosynthate is released belowground through root turnover, root exudates, or symbiotic exchange. This injection of C belowground may stimulate the mineralization of soil organic matter and mineral weathering; increasing nutrient availability and plant growth in the short-term. It is uncertain, however, what the long-term effects on nutrient cycling will be. Will supply keep pace with demand Will CO[sub 2] stimulated mineralization be short-lived Will the breakdown in nutrient cycling ultimately limit the biospheric response to elevated CO[sub 2] Initial results from long-term CO[sub 2] exposure studies indicate that increased nutrient use efficiencies and increase nutrient supplies may sustain the CO[sub 2] effect in the short-term. It is likely, however, that in the long-term, nutrient supplies will eventually limit the growth response to elevated CO[sub 2] in forested systems.
- OSTI ID:
- 7264879
- Report Number(s):
- CONF-940894-; CODEN: BECLAG
- Journal Information:
- Bulletin of the Ecological Society of America; (United States), Vol. 75:2; Conference: Annual Ecological Society of America (ESA) meeting: science and public policy, Knoxville, TN (United States), 7-11 Aug 1994; ISSN 0012-9623
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON DIOXIDE
BIOLOGICAL EFFECTS
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL EFFECTS
FORESTS
CARBON CYCLE
NUTRIENTS
CLIMATIC CHANGE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
OXIDES
OXYGEN COMPOUNDS
560300* - Chemicals Metabolism & Toxicology