Water availability modifies productivity response to biodiversity and nitrogen in long-term grassland experiments.

Autor: Kazanski CE; Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA.; The Nature Conservancy, 1101 West River Parkway, Minneapolis, Minnesota, 55415, USA., Cowles J; Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA., Dymond S; Departments of Forestry Resources, University of Minnesota, St. Paul, Minnesota, 55108, USA.; Department of Earth and Environmental Sciences, University of Minnesota-Duluth, 1114 Kirby Drive, Duluth, Minnesota, 55812, USA., Clark AT; Institute for Biology, Karl-Franzens University of Graz, Holteigasse 6, Graz, 8010, Austria., David AS; Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA., Jungers JM; Department of Agronomy and Plant Genetics, University of Minnesota, 1991 Upper Buford Circle, St. Paul, Minnesota, 55108, USA., Kendig AE; Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA., Riggs CE; Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA., Trost J; Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA.; Departments of Forestry Resources, University of Minnesota, St. Paul, Minnesota, 55108, USA., Wei X; Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA.
Jazyk: angličtina
Zdroj: Ecological applications : a publication of the Ecological Society of America [Ecol Appl] 2021 Sep; Vol. 31 (6), pp. e02363. Date of Electronic Publication: 2021 Jun 10.
DOI: 10.1002/eap.2363
Abstrakt: Diversity and nitrogen addition have positive relationships with plant productivity, yet climate-induced changes in water availability threaten to upend these established relationships. Using long-term data from three experiments in a mesic grassland (ranging from 17 to 34 yr of data), we tested how the effects of species richness and nitrogen addition on community-level plant productivity changed as a function of annual fluctuations in water availability using growing season precipitation and the Standardized Precipitation-Evapotranspiration Index (SPEI). While results varied across experiments, our findings demonstrate that water availability can magnify the positive effects of both biodiversity and nitrogen addition on productivity. These results suggest that productivity responses to anthropogenic species diversity loss and increasing nitrogen deposition could depend on precipitation regimes, highlighting the importance of testing interactions between multiple global change drivers.
(© 2021 by the Ecological Society of America.)
Databáze: MEDLINE
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