Grassland productivity limited by multiple nutrients

Faye, Philip, Prober, Suzanne M., Harpole, W. Stanley, Knops, Johannes M. H., Bakker, Jonathan D., Borer, Elizabeth T., Lind, Eric M., MacDougall, Andrew S., Seabloom, Eric W., Wragg, Peter D., Adler, Peter B., Blumenthal, Dana, Buckley, Yvonne, Chu, Chengjin, Cleland, Elsa E., Collins, Scott L., Davies, Kendi F., Du, Guozhen, Feng, Xiahui, Firn, Jennifer, Gruner, Daniel S., Hagenah, Nicole, Hautier, Yann, Heckman, Robert W., Jin, Virginia L., Kirkman, Kevin P., Klein, Julia, Ladwig, Laura M., Li, Qi, McCulley, Rebecca L., Melbourne, Brett A., Mitchell, Charles E., Moore, Joslin L., Morgan, John, Risch, Anita C., Schutz, Martin, Stevens, Carly J., Wedin, David A., & Yang, Louie (2015) Grassland productivity limited by multiple nutrients. Nature Plants, 1(7), Article number: 15080.

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Terrestrial ecosystem productivity is widely accepted to be nutrient limited1. Although nitrogen (N) is deemed a key determinant of aboveground net primary production (ANPP)2,3, the prevalence of co-limitation by N and phosphorus (P) is increasingly recognized4,​5,​6,​7,​8. However, the extent to which terrestrial productivity is co-limited by nutrients other than N and P has remained unclear. Here, we report results from a standardized factorial nutrient addition experiment, in which we added N, P and potassium (K) combined with a selection of micronutrients (K+μ), alone or in concert, to 42 grassland sites spanning five continents, and monitored ANPP. Nutrient availability limited productivity at 31 of the 42 grassland sites. And pairwise combinations of N, P, and K+μ co-limited ANPP at 29 of the sites. Nitrogen limitation peaked in cool, high latitude sites. Our findings highlight the importance of less studied nutrients, such as K and micronutrients, for grassland productivity, and point to significant variations in the type and degree of nutrient limitation. We suggest that multiple-nutrient constraints must be considered when assessing the ecosystem-scale consequences of nutrient enrichment.

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ID Code: 85881
Item Type: Journal Article
Refereed: Yes
Keywords: Grasslands, Fertilizer, Phosphorus, nitrogen, co-limitation
DOI: 10.1038/nplants.2015.80
ISSN: 2055-0278
Subjects: Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > ECOLOGICAL APPLICATIONS (050100) > Landscape Ecology (050104)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > ECOLOGY (060200) > Community Ecology (060202)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > ECOLOGY (060200) > Terrestrial Ecology (060208)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 21 Jul 2015 22:35
Last Modified: 19 Oct 2015 00:19

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