Climate modifies response of non-native and native species richness to nutrient enrichment

Flores-moreno, Habacuc, Reich, Peter B., Lind, Eric M., Sullivan, Lauren L., Seabloom, Eric W., Yahdjian, Laura, MacDougall, Andrew S., Reichmann, Lara G., Alberti, Juan, Báez, Selene, Bakker, Jonathan D., Cadotte, Marc W., Caldeira, Maria C., Chaneton, Enrique J., D'Antonio, Carla M., Fay, Philip A., Firn, Jennifer, Hagenah, Nicole, Harpole, W. Stanley, Iribarne, Oscar, Kirkman, Kevin P., Knops, Johannes M. H., La Pierre, Kimberley J., Laungani, Ramesh, Leakey, Andrew D. B., McCulley, Rebecca L., Moore, Joslin L., Pascual, Jesús, & Borer, Elizabeth T. (2016) Climate modifies response of non-native and native species richness to nutrient enrichment. Philosophical Transactions of the Royal Society B: Biological Sciences, 371(1694), pp. 1-9.

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Ecosystem eutrophication often increases domination by non-natives and causes displacement of native taxa. However, variation in environmental conditions may affect the outcome of interactions between native and non-native taxa in environments where nutrient supply is elevated. We examined the interactive effects of eutrophication, climate variability and climate average conditions on the success of native and non-native plant species using experimental nutrient manipulations replicated at 32 grassland sites on four continents. We hypothesized that effects of nutrient addition would be greatest where climate was stable and benign, owing to reduced niche partitioning. We found that the abundance of non-native species increased with nutrient addition independent of climate; however, nutrient addition increased non-native species richness and decreased native species richness, with these effects dampened in warmer or wetter sites. Eutrophication also altered the time scale in which grassland invasion responded to climate, decreasing the importance of long-term climate and increasing that of annual climate. Thus, climatic conditions mediate the responses of native and non-native flora to nutrient enrichment. Our results suggest that the negative effect of nutrient addition on native abundance is decoupled from its effect on richness, and reduces the time scale of the links between climate and compositional change.

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2 citations in Web of Science®

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ID Code: 96507
Item Type: Journal Article
Refereed: Yes
Keywords: climatic variability, non-native species, nutrient enrichment, species abundance, species richness
DOI: 10.1098/rstb.2015.0273
ISSN: 1471-2970
Subjects: Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > ECOLOGY (060200) > Community Ecology (060202)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 The Author(s)
Deposited On: 03 Jul 2016 23:34
Last Modified: 17 Aug 2016 03:48

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