Species loss due to nutrient addition increases with spatial scale in global grasslands
Seabloom, Eric W.; Batzer, Evan; Chase, Jonathan M.; Harpole, W. Stanley; Adler, Peter B.; Bagchi, Sumanta; Bakker, Jonathan D.; Barrio, Isabel C.; Biederman, Lori; Boughton, Elizabeth H.; Bugalho, Miguel N.; Caldeira, Maria C.; Catford, Jane A.; Daleo, Pedro; Eisenhauer, Nico; Eskelinen, Anu; Haider, Sylvia; Hallett, Lauren M.; Jónsdóttir, Ingibjörg Svala; Kimmel, Kaitlin; Kuhlman, Marirose; MacDougall, Andrew; Molina, Cecilia D.; Moore, Joslin L.; Morgan, John W.; Muthukrishnan, Ranjan; Ohlert, Timothy; Risch, Anita C.; Roscher, Christiane; Schütz, Martin; Sonnier, Grégory; Tognetti, Pedro M.; Virtanen, Risto; Wilfahrt, Peter A.; Borer, Elizabeth T. (2021-07-09)
Seabloom, E.W., Batzer, E., Chase, J.M., Stanley Harpole, W., Adler, P.B., Bagchi, S., et al (2021) Species loss due to nutrient addition increases with spatial scale in global grasslands. Ecology Letters, 24, 2100– 2112. https://doi.org/10.1111/ele.13838
© 2021 John Wiley & Sons Ltd. This is the peer reviewed version of the following article: Seabloom, E.W., Batzer, E., Chase, J.M., Stanley Harpole, W., Adler, P.B., Bagchi, S., et al (2021) Species loss due to nutrient addition increases with spatial scale in global grasslands. Ecology Letters, 24, 2100– 2112, which has been published in final form at https://doi.org/10.1111/ele.13838. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
The effects of altered nutrient supplies and herbivore density on species diversity vary with spatial scale, because coexistence mechanisms are scale dependent. This scale dependence may alter the shape of the species–area relationship (SAR), which can be described by changes in species richness (S) as a power function of the sample area (A): S = cAz, where c and z are constants. We analysed the effects of experimental manipulations of nutrient supply and herbivore density on species richness across a range of scales (0.01–75 m²) at 30 grasslands in 10 countries. We found that nutrient addition reduced the number of species that could co-occur locally, indicated by the SAR intercepts (log c), but did not affect the SAR slopes (z). As a result, proportional species loss due to nutrient enrichment was largely unchanged across sampling scales, whereas total species loss increased over threefold across our range of sampling scales.
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