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000015534 084__ $$2WoS$$aEnvironmental Sciences
000015534 084__ $$2WoS$$aGeosciences, Multidisciplinary
000015534 084__ $$2WoS$$aMeteorology & Atmospheric Sciences
000015534 1001_ $$0P:(DE-HGF)0$$aOelmann, Y.$$b0
000015534 245__ $$aPlant diversity effects on aboveground and belowground N pools  in temperate grassland ecosystems: Development in the first  5 years after establishment
000015534 260__ $$aWashington, DC$$bAGU$$c2011
000015534 300__ $$a1 - 11
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000015534 440_0 $$018183$$aGlobal Biochemical Cycles$$v25$$yGB2014
000015534 500__ $$aWe thank the many people who helped with the management of the experiment and the many student helpers to all the helpers who assisted during the weeding campaigns. The Jena Experiment is funded by the Deutsche Forschungsgemeinschaft (DFG, FOR 456), with additional support from the Friedrich Schiller University of Jena and the Max Planck Society.
000015534 520__ $$aBiodiversity is expected to improve ecosystem services, e. g., productivity or seepage water quality. The current view of plant diversity effects on element cycling is based on short-term grassland studies that discount possibly slow belowground feedbacks to aboveground diversity. Furthermore, these grasslands were established on formerly arable land associated with changes in soil properties, e. g., accumulation of organic matter. We hypothesize that the plant diversity-N cycle relationship changes with time since establishment. We assessed the relationship between plant diversity and (1) aboveground and soil N storage and (2) NO3-N and NH4-N availability in soil between 2003 and 2007 in the Jena Experiment, a grassland experiment established in 2002 in which the number of plant species varied from 1 to 60. The positive effect of plant diversity on aboveground N storage (mainly driven by biomass production) tended to increase through time. The initially negative correlation between plant diversity and soil NO3-N availability disappeared after 2003. In 2006 and 2007, a positive correlation between plant diversity and soil NH4-N availability appeared which coincided with a positive correlation between plant diversity and N mineralized from total N accumulated in soil. We conclude that the plant diversity-N cycle relationship in newly established grasslands changes with time because of accumulation of organic matter in soil associated with the establishment. While a positive relationship between plant diversity and soil N storage improves soil fertility and reduces fertilizing needs, increasingly closed N cycling with increasing plant diversity as illustrated by decreased NO3-N concentrations in diverse mixtures reduces the negative impact of agricultural N leaching on groundwater resources.
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000015534 7001_ $$0P:(DE-HGF)0$$aBuchmann, N.$$b1
000015534 7001_ $$0P:(DE-HGF)0$$aGleixner, G.$$b2
000015534 7001_ $$0P:(DE-HGF)0$$aHabekost, M.$$b3
000015534 7001_ $$0P:(DE-HGF)0$$aRocher, S.$$b4
000015534 7001_ $$0P:(DE-HGF)0$$aRosenkranz, S.$$b5
000015534 7001_ $$0P:(DE-HGF)0$$aSchulze, E.-D.$$b6
000015534 7001_ $$0P:(DE-HGF)0$$aSteinbeiss, S.$$b7
000015534 7001_ $$0P:(DE-Juel1)129409$$aTemperton, V.M.$$b8$$uFZJ
000015534 7001_ $$0P:(DE-HGF)0$$aWeigelt, A.$$b9
000015534 7001_ $$0P:(DE-HGF)0$$aWeisser, W.W.$$b10
000015534 7001_ $$0P:(DE-HGF)0$$aWilcke, W.$$b11
000015534 773__ $$0PERI:(DE-600)2021601-4$$a10.1029/2010GB003869$$gVol. 25, p. 1 - 11$$p1 - 11$$q25<1 - 11$$tGlobal biogeochemical cycles$$v25$$x0886-6236$$y2011
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