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Species loss due to nutrient addition increases with spatial scale in global grasslands

Seabloom, EW and Batzer, E and Chase, JM and Stanley Harpole, W and Adler, PB and Bagchi, S and Bakker, JD and Barrio, IC and Biederman, L and Boughton, EH and Bugalho, MN and Caldeira, MC and Catford, JA and Daleo, P and Eisenhauer, N and Eskelinen, A and Haider, S and Hallett, LM and Svala Jónsdóttir, I and Kimmel, K and Kuhlman, M and MacDougall, A and Molina, CD and Moore, JL and Morgan, JW and Muthukrishnan, R and Ohlert, T and Risch, AC and Roscher, C and Schütz, M and Sonnier, G and Tognetti, PM and Virtanen, R and Wilfahrt, PA and Borer, ET (2021) Species loss due to nutrient addition increases with spatial scale in global grasslands. In: Ecology Letters, 24 . pp. 2100-2112.

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Official URL: https://doi.org/10.1111/ele.13838

Abstract

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. © 2021 John Wiley & Sons Ltd.

Item Type: Journal Article
Publication: Ecology Letters
Publisher: Blackwell Publishing Ltd
Additional Information: The copyright for this article belongs to John Wiley and Sons Inc
Department/Centre: Division of Biological Sciences > Centre for Ecological Sciences
Date Deposited: 16 Nov 2021 10:58
Last Modified: 16 Nov 2021 10:58
URI: http://eprints.iisc.ac.in/id/eprint/69708

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