Lack of eutrophication in a tallgrass prairie ecosystem over 27 years

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Show simple item record McLauchlan, Kendra K. Craine, Joseph M. Nippert, Jesse B. Ocheltree, Troy W. 2014-08-04T16:10:58Z 2014-08-04T16:10:58Z 2014-05-01
dc.description.abstract Many North American grasslands are receiving atmospheric nitrogen (N) deposition at rates above what are considered critical eutrophication thresholds. Yet, potential changes in grassland function due to anthropogenic N deposition are poorly resolved, especially considering that other dynamic factors such as land use and precipitation can also affect N availability. To better understand whether elevated N deposition has altered ecosystem structure or function in North American grasslands, we analyzed a 27-year record of ecophysiological, community, and ecosystem metrics for an annually burned Kansas tallgrass prairie. Over this time, despite increasing rates of N deposition that are within the range of critical loads for grasslands, there was no evidence of eutrophication. Plant N concentrations did not increase, soil moisture did not decline, forb diversity did not decline, and the relative abundance of dominant grasses did not shift toward more eutrophic species. Neither aboveground primary productivity nor N availability to plants increased. The fates of deposited N in grasslands are still uncertain, and could include management losses through burning and grazing. However, evidence from this grassland indicates that eutrophication of North American grassland ecosystems is not an inevitable consequence of current levels of N deposition. en_US
dc.language.iso en_US en_US
dc.relation.uri en_US
dc.rights This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). en_US
dc.subject Eutrophication en_US
dc.subject Grassland en_US
dc.subject Konza Prairie en_US
dc.subject Nitrogen deposition en_US
dc.subject Precipitation en_US
dc.subject Tallgrass prairie en_US
dc.title Lack of eutrophication in a tallgrass prairie ecosystem over 27 years en_US
dc.type Article (publisher version) en_US 2014 en_US
dc.citation.doi 10.1890/13-1068.1 en_US
dc.citation.epage 1235 en_US
dc.citation.issue 5 en_US
dc.citation.jtitle Ecology en_US
dc.citation.spage 1225 en_US
dc.citation.volume 95 en_US
dc.contributor.authoreid mclauch en_US
dc.contributor.authoreid jcraine en_US
dc.contributor.authoreid nippert en_US

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