Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems

Abstract Nitrogen (N) deposition has increased globally and has profoundly influenced the structure and function of grasslands. Previous studies have discussed how N addition affects aboveground biomass (AGB), but the effects of N addition on the AGB of different functional groups in grasslands rema...

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Autores principales:	Chengming You, Fuzhong Wu, Youmin Gan, Wanqin Yang, Zhongmin Hu, Zhenfeng Xu, Bo Tan, Lin Liu, Xiangyin Ni
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8ef2300f7ed04c7083d9d677e8228481
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spelling	oai:doaj.org-article:8ef2300f7ed04c7083d9d677e82284812021-12-02T12:32:27ZGrass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems10.1038/s41598-017-01728-x2045-2322https://doaj.org/article/8ef2300f7ed04c7083d9d677e82284812017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01728-xhttps://doaj.org/toc/2045-2322Abstract Nitrogen (N) deposition has increased globally and has profoundly influenced the structure and function of grasslands. Previous studies have discussed how N addition affects aboveground biomass (AGB), but the effects of N addition on the AGB of different functional groups in grasslands remain unclear. We conducted a meta-analysis to identify the responses of AGB and the AGB of grasses (AGBgrass) and forbs (AGBforb) to N addition across global grasslands. Our results showed that N addition significantly increased AGB and AGBgrass by 31 and 79%, respectively, but had no significant effect on AGBforb. The effects of N addition on AGB and AGBgrass increased with increasing N addition rates, but which on AGBforb decreased. Although study durations did not regulate the response ratio of N addition for AGB, which for AGBgrass increased and for AGBforb decreased with increasing study durations. Furthermore, the N addition response ratios for AGB and AGBgrass increased more strongly when the mean annual precipitation (MAP) was 300–600 mm but decreased with an increase in the mean annual temperature (MAT). AGBforb was only slightly affected by MAP and MAT. Our findings suggest that an acceleration of N deposition will increase grassland AGB by altering species composition.Chengming YouFuzhong WuYoumin GanWanqin YangZhongmin HuZhenfeng XuBo TanLin LiuXiangyin NiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chengming You Fuzhong Wu Youmin Gan Wanqin Yang Zhongmin Hu Zhenfeng Xu Bo Tan Lin Liu Xiangyin Ni Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems
description	Abstract Nitrogen (N) deposition has increased globally and has profoundly influenced the structure and function of grasslands. Previous studies have discussed how N addition affects aboveground biomass (AGB), but the effects of N addition on the AGB of different functional groups in grasslands remain unclear. We conducted a meta-analysis to identify the responses of AGB and the AGB of grasses (AGBgrass) and forbs (AGBforb) to N addition across global grasslands. Our results showed that N addition significantly increased AGB and AGBgrass by 31 and 79%, respectively, but had no significant effect on AGBforb. The effects of N addition on AGB and AGBgrass increased with increasing N addition rates, but which on AGBforb decreased. Although study durations did not regulate the response ratio of N addition for AGB, which for AGBgrass increased and for AGBforb decreased with increasing study durations. Furthermore, the N addition response ratios for AGB and AGBgrass increased more strongly when the mean annual precipitation (MAP) was 300–600 mm but decreased with an increase in the mean annual temperature (MAT). AGBforb was only slightly affected by MAP and MAT. Our findings suggest that an acceleration of N deposition will increase grassland AGB by altering species composition.
format	article
author	Chengming You Fuzhong Wu Youmin Gan Wanqin Yang Zhongmin Hu Zhenfeng Xu Bo Tan Lin Liu Xiangyin Ni
author_facet	Chengming You Fuzhong Wu Youmin Gan Wanqin Yang Zhongmin Hu Zhenfeng Xu Bo Tan Lin Liu Xiangyin Ni
author_sort	Chengming You
title	Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems
title_short	Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems
title_full	Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems
title_fullStr	Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems
title_full_unstemmed	Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems
title_sort	grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8ef2300f7ed04c7083d9d677e8228481
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Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems

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