Asymmetric responses of primary productivity to precipitation extremes: A synthesis of grassland precipitation manipulation experiments
- Univ. of Oklahoma, Norman, OK (United States). Dept. of Microbiology and Plant Biology
- Arizona State Univ., Tempe, AZ (United States). School of Life Sciences
- Colorado State Univ., Fort Collins, CO (United States). Dept. of Biology & Graduate Degree Program in Ecology
- Univ. of South Florida, Tampa, FL (United States). Dept. of Integrative Biology
- US Dept. of Agriculture (USDA)., Fort Collins, CO (United States). Agriculture Research Service (ARS)
- Univ. of Alberta, Edmonton, AB (Canada). Agricultural, Food & Nutritional Science
- Humboldt State Univ., Arcata, CA (United States). Dept. of Environmental Science and Management
- Univ. of Alberta, Edmonton, AB (Canada). Dept. of Biological Sciences
- Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Biology
- Michigan State Univ., Hickory Corners, MI (United States). Dept. of Integrative Biology, Dept. of Microbiology and Molecular Genetics and Kellogg Biological Station
- Federal Inst. of Technology, Zurich (Switzerland). Dept. of Environmental Systems Science
- Czech Academy of Sciences, Brno (Czech Republic). Global Change Research Inst.
- Univ. Rey Juan Carlos, Mostoles (Spain). Area of Biodiversity and Conservation, Dept. of Biology, Geology, Physics and Inorganic Chemistry, Higher School of Experimental Sciences and Technology
- Consejo Superior de Investigaciones Cientificas (CSIC), Catalonia (Spain). Global Ecology Unit; Centre for Research on Ecology and Forestry Applications (CREAF), Catalonia (Spain)
- Northwest A&F Univ., Yangling (China). College of Forestry
- Government of Alberta, Edmonton, AB (Canada). Environment and Parks
- Univ. de Buenos Aires, Buenos Aires (Argentina). Faculty of Agronomy, Inst. for Physiological and Ecological Research Associated with Agriculture (IFEVA), National Research Council Scientific and Technical
- Rice Univ., Houston, TX (United States). Dept. of BioSciences; Univ. of Texas, Arlington, TX (United States). Dept. of Biology
Climatic changes are altering Earth's hydrological cycle, resulting in altered precipitation amounts, increased interannual variability of precipitation, and more frequent extreme precipitation events. These trends will likely continue into the future, having substantial impacts on net primary productivity (NPP) and associated ecosystem services such as food production and carbon sequestration. Frequently, experimental manipulations of precipitation have linked altered precipitation regimes to changes in NPP. Yet, findings have been diverse and substantial uncertainty still surrounds generalities describing patterns of ecosystem sensitivity to altered precipitation. Additionally, we do not know whether previously observed correlations between NPP and precipitation remain accurate when precipitation changes become extreme. We synthesized results from 83 case studies of experimental precipitation manipulations in grasslands worldwide. Here, we used meta-analytical techniques to search for generalities and asymmetries of aboveground NPP (ANPP) and belowground NPP (BNPP) responses to both the direction and magnitude of precipitation change. Sensitivity (i.e., productivity response standardized by the amount of precipitation change) of BNPP was similar under precipitation additions and reductions, but ANPP was more sensitive to precipitation additions than reductions; this was especially evident in drier ecosystems. Additionally, overall relationships between the magnitude of productivity responses and the magnitude of precipitation change were saturating in form. The saturating form of this relationship was likely driven by ANPP responses to very extreme precipitation increases, although there were limited studies imposing extreme precipitation change, and there was considerable variation among experiments. Finally, this highlights the importance of incorporating gradients of manipulations, ranging from extreme drought to extreme precipitation increases into future climate change experiments. Additionally, policy and land management decisions related to global change scenarios should consider how ANPP and BNPP responses may differ, and that ecosystem responses to extreme events might not be predicted from relationships found under moderate environmental changes.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725; 1137293; 1027319; 1456597; AFRI 2016-67012-25169; SyG-2013-610028 IMBALANCE-P
- OSTI ID:
- 1394445
- Journal Information:
- Global Change Biology, Vol. 23, Issue 10; ISSN 1354-1013
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Warming of alpine tundra enhances belowground production and shifts community towards resource acquisition traits
Unchanged carbon balance driven by equivalent responses of production and respiration to climate change in a mixed‐grass prairie