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Title: Asymmetric responses of primary productivity to precipitation extremes: A synthesis of grassland precipitation manipulation experiments

Journal Article · · Global Change Biology
DOI: https://doi.org/10.1111/gcb.13706 · OSTI ID:1394445
ORCiD logo [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [11];  [12]; ORCiD logo [1];  [3];  [5];  [1];  [13];  [14];  [9] more »;  [3];  [15];  [16];  [17]; ORCiD logo [18];  [1] « less
  1. Univ. of Oklahoma, Norman, OK (United States). Dept. of Microbiology and Plant Biology
  2. Arizona State Univ., Tempe, AZ (United States). School of Life Sciences
  3. Colorado State Univ., Fort Collins, CO (United States). Dept. of Biology & Graduate Degree Program in Ecology
  4. Univ. of South Florida, Tampa, FL (United States). Dept. of Integrative Biology
  5. US Dept. of Agriculture (USDA)., Fort Collins, CO (United States). Agriculture Research Service (ARS)
  6. Univ. of Alberta, Edmonton, AB (Canada). Agricultural, Food & Nutritional Science
  7. Humboldt State Univ., Arcata, CA (United States). Dept. of Environmental Science and Management
  8. Univ. of Alberta, Edmonton, AB (Canada). Dept. of Biological Sciences
  9. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Biology
  10. Michigan State Univ., Hickory Corners, MI (United States). Dept. of Integrative Biology, Dept. of Microbiology and Molecular Genetics and Kellogg Biological Station
  11. Federal Inst. of Technology, Zurich (Switzerland). Dept. of Environmental Systems Science
  12. Czech Academy of Sciences, Brno (Czech Republic). Global Change Research Inst.
  13. 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
  14. Consejo Superior de Investigaciones Cientificas (CSIC), Catalonia (Spain). Global Ecology Unit; Centre for Research on Ecology and Forestry Applications (CREAF), Catalonia (Spain)
  15. Northwest A&F Univ., Yangling (China). College of Forestry
  16. Government of Alberta, Edmonton, AB (Canada). Environment and Parks
  17. 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
  18. 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
Citation Metrics:
Cited by: 167 works
Citation information provided by
Web of Science

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Precipitation amount and event size interact to reduce ecosystem functioning during dry years in a mesic grassland journal August 2019
Sensitivity of primary production to precipitation across the United States journal January 2020
Drought timing, not previous drought exposure, determines sensitivity of two shortgrass species to water stress journal September 2018
Climate variability decreases species richness and community stability in a temperate grassland journal June 2018
Drought consistently alters the composition of soil fungal and bacterial communities in grasslands from two continents journal March 2018
Shifts in the dynamics of productivity signal ecosystem state transitions at the biome-scale journal July 2018
Effects of extreme drought on plant nutrient uptake and resorption in rhizomatous vs bunchgrass-dominated grasslands journal July 2018
Response of soil microbial communities to altered precipitation: A global synthesis journal July 2018
Asymmetric responses of plant community structure and composition to precipitation variabilities in a semi-arid steppe journal October 2019
Temperature‐mediated responses of carbon fluxes to precipitation variabilities in an alpine meadow ecosystem on the Tibetan Plateau journal July 2019
Semiarid ecosystem sensitivity to precipitation extremes: weak evidence for vegetation constraints journal January 2019
Grazer movements exacerbate grass declines during drought in an African savanna journal November 2018
Soil amendment interacts with invasive grass and drought to uniquely influence aboveground versus belowground biomass in aridland restoration journal December 2019
Effects of climate warming on carbon fluxes in grasslands— A global meta‐analysis journal February 2019
Response of the soil macrofauna abundance and community structure to drought stress under agroforestry system in southeastern Qinghai-Tibet Plateau journal July 2019
Reduced tree growth in the semiarid United States due to asymmetric responses to intensifying precipitation extremes journal October 2019
Chronic fertilization and irrigation gradually and increasingly restructure grassland communities journal March 2019
Drought, Heat, and the Carbon Cycle: a Review journal June 2018
Sensitivity of Global Pasturelands to Climate Variation journal December 2019
Successional change in species composition alters climate sensitivity of grassland productivity journal June 2018
Ecological responses to heavy rainfall depend on seasonal timing and multi‐year recurrence journal May 2019
Effects of extreme changes in precipitation on the physiology of C4 grasses journal June 2018
Distinct fine‐root responses to precipitation changes in herbaceous and woody plants: a meta‐analysis journal November 2019
Carbon exchange responses of a mesic grassland to an extreme gradient of precipitation journal November 2018
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Large‐scale and local climatic controls on large herbivore productivity: implications for adaptive rangeland management journal January 2020
Large‐Scale and Local Climatic Controls on Large Herbivore Productivity: Implications for Adaptive Rangeland Management journal April 2020
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Temperature‐mediated responses of carbon fluxes to precipitation variabilities in an alpine meadow ecosystem on the Tibetan Plateau journal July 2019
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Figures / Tables (4)