Campus Units
Ecology, Evolution and Organismal Biology
Document Type
Article
Publication Version
Published Version
Publication Date
6-23-2016
Journal or Book Title
Ecosystems
Volume
19
Issue
8
First Page
1376
Last Page
1385
DOI
10.1007/s10021-016-0009-8
Abstract
Identifying the plant traits and patterns of trait distribution in communities that are responsible for biotic regulation of CO2 uptake–climate responses remains a priority for modeling terrestrial C dynamics. We used remotely sensed estimates of gross primary productivity (GPP) from plots planted to different combinations of perennial grassland species in order to determine links between traits and GPP–climate relationships. Climatic variables explained about 50% of the variance in temporal trends in GPP despite large variation in CO2 uptake among seasons, years, and plots of differing composition. GPP was highly correlated with contemporary changes in net radiation (Rn) and precipitation deficit (potential evapotranspiration minus precipitation) but was negatively correlated with precipitation summed over 210 days prior to flux measurements. Plots differed in GPP–Rn and GPP–water (deficit, precipitation) relationships. Accounting for differences in GPP–climate relationships explained an additional 11% of variance in GPP. Plot differences in GPP–Rn and GPP–precipitation slopes were linked to differences in community-level light-use efficiency (GEE*). Plot differences in GPP–deficit slopes were linked to differences in a species abundance-weighted index of specific leaf area (SLA). GEE* and weighted SLA represent vegetation properties that may regulate how CO2 uptake responds to climatic variation in grasslands.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Polley, H. Wayne; Gibson, Anne E.; Fay, Philip A.; and Wilsey, Brian J., "Biotic Regulation of CO2 Uptake–Climate Responses: Links to Vegetation Properties" (2016). Ecology, Evolution and Organismal Biology Publications. 243.
https://lib.dr.iastate.edu/eeob_ag_pubs/243
Included in
Behavior and Ethology Commons, Evolution Commons, Terrestrial and Aquatic Ecology Commons
Comments
This article is published as Polley, H. Wayne, Anne E. Gibson, Philip A. Fay, and Brian J. Wilsey. "Biotic Regulation of CO2 Uptake–Climate Responses: Links to Vegetation Properties." Ecosystems 19, no. 8 (2016): 1376-1385. doi: 10.1007/s10021-016-0009-8. Posted with permission.