Legacy effects of nitrogen deposition on plant nutrient stoichiometry in a temperate grassland
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Nitrogen (N) deposition has negative consequences for plant communities and ecosystem functioning. Nitrogen deposition is declining or is projected to decline in many regions due to the reduction of N-compound emissions. It remains unknown whether the cessation of N deposition will have legacy effects on plant nutrient stoichiometry. If there are stoichiometric legacy effects at the community-level from prior N enrichment, the contribution of changes in community composition relative to the stoichiometric responses of individual functional groups in driving these changes is unknown.
We measured plant N:P ratio at both functional group level and community level in a temperate steppe in three consecutive years following cessation of a 7-year N addition experiment with a wide-range of total amount added N in which the total amount of N added ranged from 0 to 350 g m−2.
The total amount of N addition was positively correlated with tall rhizomatous grass productivity and negatively correlated with tall bunchgrass productivity. Plant N:P ratios at both functional group and community levels did not change across N addition gradient. Community composition shifts contributed less than intra-group variation to the total variation of community level nutrient status in response to historic N addition.
Our results indicated that biological N:P imbalance in response to N deposition can be rapidly ameliorated after the cessation of N deposition. Such legacy effects of N deposition on plant nutrient status are largely driven by the changes of nutrient status of individual plants instead of N-induced shifts in community composition.
KeywordsCommunity composition Ecological stoichiometry Ecosystem recovery Intra-specific variation Nitrogen recovery N:P ratio Plant functional traits
Intra-group trait variation
Tall rhizome grass
Community weighted mean trait value
We thank the Inner Mongolia Grassland Ecosystem Research Station for logistical support. We appreciate the constructive comments from two anonymous reviewers. This work was supported by Key Research Program from CAS (QYZDB-SSW-DQC006), National Natural Science Foundation of China (31822006 and 31770503), National Key Research and Development Program of China (2016YFC0500601), Strategic Priority Research Program of the Chinese Academy of Sciences (XDA23070103), Youth Innovation Promotion Association CAS (2014174), Doctoral Scientific Research Foundation of Liaoning (20170520179), Liaoning Revitalizing Talents Program (XLYC1807061), Shenyang Science and Technology Bureau (18-013-0-04 and RC180320), and Key Laboratory of Vegetation Ecology, Ministry of Education. Authors declare no conflict of interests.
- Bobbink R, Hicks K, Galloway J, Spranger T, Alkemade R, Ashmore M, Bustamante M, Cinderby S, Davidson E, Dentener F, Emmett B, Erisman JW, Fenn M, Gilliam F, Nordin A, Pardo L, De Vries W (2010) Global assessment of nitrogen deposition effects on terrestrial plant diversity: a synthesis. Ecol Appl 20:30–59PubMedCrossRefGoogle Scholar
- Cleland EE, Clark CM, Collins SL, Fargione JE, Gough L, Gross KL, Milchunas DG, Pennings SC, Bowman WD, Burke IC, Lauenroth WK, Robertson GP, Simpson JC, Tilman D, Suding KN (2008) Species responses to nitrogen fertilization in herbaceous plant communities, and associated species traits. Ecology 89:1175–1175CrossRefGoogle Scholar
- Davidson EA, David MB, Galloway JN, Goodale CL, Haeuber R, Harrison JA, Howarth RW, Jaynes DB, Lowrance RR, Nolan BT, Peel JL, Pinder RW, Porter E, Snyder CS, Townsend AR, Ward MH (2012) Excess nitrogen in the U.S. environment: trends, risks, and solutions. Issu Ecol 15:1–16Google Scholar
- Hou SL, Lü XT, Yin JX, Yang JJ, Hu YY, Wei HW, Zhang ZW, Yang GJ, Liu ZY, Han XG (2019) The relative contributions of intra- and inter-specific variation in driving community stoichiometric responses to nitrogen deposition and mowing in a grassland. Sci Total Environ 666:887–893PubMedCrossRefGoogle Scholar
- Penuelas J, Poulter B, Sardans J, Ciais P, van der Velde M, Bopp L, Boucher O, Godderis Y, Hinsinger P, Llusia J, Nardin E, Vicca S, Obersteiner M, Janssens IA (2013) Human-induced nitrogen-phosphorus imbalances alter natural and managed ecosystems across the globe. Nat Commun 4:2934. https://doi.org/10.1038/ncomms3934 CrossRefPubMedGoogle Scholar
- Siefert A, Violle C, Chalmandrier L, Albert CH, Taudiere A, Fajardo A, Aarssen LW, Baraloto C, Carlucci MB, Cianciaruso MV, Dantas VD, de Bello F, Duarte LDS, Fonseca CR, Freschet GT, Gaucherand S, Gross N, Hikosaka K, Jackson B, Jung V, Kamiyama C, Katabuchi M, Kembel SW, Kichenin E, Kraft NJB, Lagerstrom A, Le Bagousse-Pinguet Y, Li YZ, Mason N, Messier J, Nakashizuka T, McC Overton J, Peltzer DA, Perez-Ramos IM, Pillar VD, Prentice HC, Richardson S, Sasaki T, Schamp BS, Schob C, Shipley B, Sundqvist M, Sykes MT, Vandewalle M, Wardle DA (2015) A global meta-analysis of the relative extent of intraspecific trait variation in plant communities. Ecol Lett 18:1406–1419PubMedCrossRefGoogle Scholar