Interannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing

Understanding the effects of livestock grazing on ecosystem respiration (Re) of grassland ecosystems is critical for accurately assessing the feedback of grazing management to climate change. We examined ecosystem respiration in response to varying cattle grazing intensities during growing seasons f...

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Autores principales:	Ruirui Yan, Yu Zhang, Miao Wang, Ruiqiang Li, Dongyan Jin, Xiaoping Xin, Linghao Li
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Grazing intensity Ecosystem respiration Canopy biomass Soil nutrient Soil moisture Temperate steppe Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/a44fc83ec22b4fcfa7dd8de451ca5462
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spelling	oai:doaj.org-article:a44fc83ec22b4fcfa7dd8de451ca54622021-12-01T04:59:28ZInterannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing1470-160X10.1016/j.ecolind.2021.108121https://doaj.org/article/a44fc83ec22b4fcfa7dd8de451ca54622021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X2100786Xhttps://doaj.org/toc/1470-160XUnderstanding the effects of livestock grazing on ecosystem respiration (Re) of grassland ecosystems is critical for accurately assessing the feedback of grazing management to climate change. We examined ecosystem respiration in response to varying cattle grazing intensities during growing seasons from 2009 to 2018 in a meadow steppe ecosystem of eastern Inner Mongolia. We found that ungrazed swards had the highest mean annual Re rate, with seasonal CVs in Re ranging from 37.53% to 46.04% for all treatments. When all treatments were analysed as a whole, we identified a significant positive relationship between the annual Re rate and annual peak value of standing plant aboveground biomass. Our findings showed that controlling factors on the mean annual Re differed substantially with grazing intensity. In ungrazed and lightly-grazed plots (G0.00 and G0.23), the mean annual Re rate was controlled mainly by canopy height and/or rainfall, while it was controlled more predominantly by contents of NH4+-N and available phosphorus in moderately and heavily grazed plots. We detected significant positive relationships of the annual Re rate with rainfall, soil moisture, ammonium nitrogen, and soil available phosphorus during the entire study period, whereas significant negative relationships were detected between the annual ecosystem respiration rate and the mean growing season temperature, irrespective of grazing intensity. Our findings revealed that grazing could substantially simplify the relationship between the mean annual Re rate and biotic and abiotic parameters. It may be concluded that the relationship between the annual Re rate and the standing crop aboveground biomass was a principal mechanism underlying the effects of gradient grazing on the Re of Chinese meadow steppe ecosystems.Ruirui YanYu ZhangMiao WangRuiqiang LiDongyan JinXiaoping XinLinghao LiElsevierarticleGrazing intensityEcosystem respirationCanopy biomassSoil nutrientSoil moistureTemperate steppeEcologyQH540-549.5ENEcological Indicators, Vol 131, Iss , Pp 108121- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Grazing intensity Ecosystem respiration Canopy biomass Soil nutrient Soil moisture Temperate steppe Ecology QH540-549.5
spellingShingle	Grazing intensity Ecosystem respiration Canopy biomass Soil nutrient Soil moisture Temperate steppe Ecology QH540-549.5 Ruirui Yan Yu Zhang Miao Wang Ruiqiang Li Dongyan Jin Xiaoping Xin Linghao Li Interannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing
description	Understanding the effects of livestock grazing on ecosystem respiration (Re) of grassland ecosystems is critical for accurately assessing the feedback of grazing management to climate change. We examined ecosystem respiration in response to varying cattle grazing intensities during growing seasons from 2009 to 2018 in a meadow steppe ecosystem of eastern Inner Mongolia. We found that ungrazed swards had the highest mean annual Re rate, with seasonal CVs in Re ranging from 37.53% to 46.04% for all treatments. When all treatments were analysed as a whole, we identified a significant positive relationship between the annual Re rate and annual peak value of standing plant aboveground biomass. Our findings showed that controlling factors on the mean annual Re differed substantially with grazing intensity. In ungrazed and lightly-grazed plots (G0.00 and G0.23), the mean annual Re rate was controlled mainly by canopy height and/or rainfall, while it was controlled more predominantly by contents of NH4+-N and available phosphorus in moderately and heavily grazed plots. We detected significant positive relationships of the annual Re rate with rainfall, soil moisture, ammonium nitrogen, and soil available phosphorus during the entire study period, whereas significant negative relationships were detected between the annual ecosystem respiration rate and the mean growing season temperature, irrespective of grazing intensity. Our findings revealed that grazing could substantially simplify the relationship between the mean annual Re rate and biotic and abiotic parameters. It may be concluded that the relationship between the annual Re rate and the standing crop aboveground biomass was a principal mechanism underlying the effects of gradient grazing on the Re of Chinese meadow steppe ecosystems.
format	article
author	Ruirui Yan Yu Zhang Miao Wang Ruiqiang Li Dongyan Jin Xiaoping Xin Linghao Li
author_facet	Ruirui Yan Yu Zhang Miao Wang Ruiqiang Li Dongyan Jin Xiaoping Xin Linghao Li
author_sort	Ruirui Yan
title	Interannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing
title_short	Interannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing
title_full	Interannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing
title_fullStr	Interannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing
title_full_unstemmed	Interannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing
title_sort	interannual variation in ecosystem respiration in an inner mongolian meadow steppe in response to livestock grazing
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a44fc83ec22b4fcfa7dd8de451ca5462
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Interannual variation in ecosystem respiration in an Inner Mongolian meadow steppe in response to livestock grazing

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