Skip to Main Content
Modeled interactive effects of precipitation, temperature, and [CO2] on ecosystem carbon and water dynamics in different climatic zonesAuthor(s): Yiqi Luo; Dieter Gerten; Guerric Le Maire; William J. Parton; Ensheng Weng; Xuhui Zhou; Cindy Keough; Claus Beier; Philippe Ciais; Wolfgang Cramer; Jeffrey S. Dukes; Bridget Emmett; Paul J. Hanson; Alan Knapp; Sune Linder; Dan Nepstad; Lindsey Rustad
Source: Global Change Biology
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
View PDF (232.0 KB)
DescriptionInteractive effects of multiple global change factors on ecosystem processes are complex. It is relatively expensive to explore those interactions in manipulative experiments. We conducted a modeling analysis to identify potentially important interactions and to stimulate hypothesis formulation for experimental research. Four models were used to quantify interactive effects of climate warming (T), altered precipitation amounts [doubled (DP) and halved (HP)] and seasonality (SP, moving precipitation in July and August to January and February to create summer drought), and elevated [CO2] (C) on net primary production (NPP), heterotrophic respiration (Rh), net ecosystem production (NEP), transpiration, and runoff.We examined those responses in seven ecosystems, including forests, grasslands, and heathlands in different climate zones. The modeling analysis showed that none of the threeway interactions among T, C, and altered precipitation was substantial for either carbon or water processes, nor consistent among the seven ecosystems. However, two-way interactive effects on NPP, Rh, and NEP were generally positive (i.e. amplification of one factor's effect by the other factor) between T and C or between T and DP. A negative interaction (i.e. depression of one factor's effect by the other factor) occurred for simulated NPP between T and HP. The interactive effects on runoff were positive between T and HP. Four pairs of two-way interactive effects on plant transpiration were positive and two pairs negative. In addition, wet sites generally had smaller relative changes in NPP, Rh, runoff, and transpiration but larger absolute changes in NEP than dry sites in response to the treatments. The modeling results suggest new hypotheses to be tested in multifactor global change experiments. Likewise, more experimental evidence is needed for the further improvement of ecosystem models in order to adequately simulate complex interactive processes.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationLuo, Yiqi; Gerten, Dieter; Le Maire, Guerric; Parton, William J.; Weng, Ensheng; Zhou, Xuhui; Keough, Cindy; Beier, Claus; Ciais, Philippe; Cramer, Wolfgang; Dukes, Jeffrey S.; Emmett, Bridget; Hanson, Paul J.; Knapp, Alan; Linder, Sune; Nepstad, Dan; Rustad, Lindsey. 2008. Modeled interactive effects of precipitation, temperature, and [CO2] on ecosystem carbon and water dynamics in different climatic zones. Global Change Biology. 14(9): 1986-1999. https://doi.org/10.1111/j.1365-2486.2008.01629.x.
Keywordsclimate change, heterotrophic respiration, net ecosystem production, net primary production, runoff, transpiration
- The changing global carbon cycle: linking local plant-soil carbon dynamics to global consequences
- Fertilization effects on forest carbon storage and exchange, and net primary production: A new hybrid process model for stand management
- Fertilization effects on forest carbon storage and exchange, and net primary production: a new hybrid process model for stand management
XML: View XML