Elevated CO and water addition enhance nitrogen turnover in grassland plants with implications for temporal stability.

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ID: 108320
2018
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Abstract
Temporal variation in soil nitrogen (N) availability affects growth of grassland communities that differ in their use and reuse of N. In a 7-year-long climate change experiment in a semi-arid grassland, the temporal stability of plant biomass production varied with plant N turnover (reliance on externally acquired N relative to internally recycled N). Species with high N turnover were less stable in time compared to species with low N turnover. In contrast, N turnover at the community level was positively associated with asynchrony in biomass production, which in turn increased community temporal stability. Elevated CO and summer irrigation, but not warming, enhanced community N turnover and stability, possibly because treatments promoted greater abundance of species with high N turnover. Our study highlights the importance of plant N turnover for determining the temporal stability of individual species and plant communities affected by climate change.
Reference Key
dijkstra2018elevatedecology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Dijkstra, Feike A;Carrillo, Yolima;Blumenthal, Dana M;Mueller, Kevin E;LeCain, Dan R;Morgan, Jack A;Zelikova, Tamara J;Williams, David G;Follett, Ronald F;Pendall, Elise;
Journal Ecology letters
Year 2018
DOI
10.1111/ele.12935
URL
Keywords
global warming plant uptake semi-arid nitrogen cycling 15n stable isotopes grassland species pulse-chase reallocation resorption

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