Plant carbon-nutrient interactions control CO{sub 2} exchange in Alaskan wet sedge tundra ecosystems

Journal Article · Tue Feb 01 04:00:00 EST 2000 · Ecology

DOI:https://doi.org/10.1890/0012-9658(2000)081[0453:PCNICC]2.0.CO;2· OSTI ID:20015089

Johnson, L C; Shaver, G R; Cades, D H; Rastetter, E; Nadelhoffer, K; Giblin, A; Laundre, J; Stanley, A

The authors explored the long-term (8-yr) effects of separate field manipulations of temperature and nutrient availability on carbon balance in wet sedge tundra near the Arctic Long Term Ecological Research (LTER) site at Toolik Lake, Alaska. Their goals were (1) to assess the relative importance of chronic warming (with field greenhouses) and increased N and P availability (by fertilization) in controlling gross ecosystem photosynthesis, ecosystem respiration, and ultimately ecosystem C balance; and (2) to attempt to partition ecosystem responses to these treatments between plant and soil contributions. The authors present results of the effects of these manipulations on whole-system CO{sub 2} exchange over seasonal and duel cycles, and on nonrhizosphere soil microbial respiration using in situ soil incubations.

• Research Organization: Kansas State Univ., Manhattan, KS (US)
• OSTI ID: 20015089
• Journal Information: Ecology, Journal Name: Ecology Journal Issue: 2 Vol. 81; ISSN 0012-9658; ISSN ECOLAR
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ALASKA
BIOLOGICAL AVAILABILITY
CARBON CYCLE
CARBON DIOXIDE
CARBON SINKS
PLANTS
TERRESTRIAL ECOSYSTEMS
TUNDRA