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Effects of grazing on photosynthetic features and soil respiration of rangelands in the Tianshan Mountains of Northwest China

Rangelands play a critical role in the global carbon cycle. However, the eco-physiological mechanisms associated with the effects of grazing on leaf photosynthesis and soil respiration remain poorly understood. To examine the impacts of grazing on leaf photosynthesis and soil respiration, we measure...

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Detalles Bibliográficos
Autores principales: Liu, Hua, Zang, Runguo, Chen, Han Y. H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4958923/
https://www.ncbi.nlm.nih.gov/pubmed/27452980
http://dx.doi.org/10.1038/srep30087
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author Liu, Hua
Zang, Runguo
Chen, Han Y. H.
author_facet Liu, Hua
Zang, Runguo
Chen, Han Y. H.
author_sort Liu, Hua
collection PubMed
description Rangelands play a critical role in the global carbon cycle. However, the eco-physiological mechanisms associated with the effects of grazing on leaf photosynthesis and soil respiration remain poorly understood. To examine the impacts of grazing on leaf photosynthesis and soil respiration, we measured the photosynthetic parameters of the dominant species (Trifolium repens) and the soil respiration in grazed and ungrazed rangelands in the Tianshan Mountains of China. We found that grazing reduced the daily maximum net photosynthetic rate and soil respiration rates by 35% and 15%, respectively. The photosynthetic quantum yield, dark respiratory rate, and water use efficiency of T. repens leaves were reduced in grazed plots by 33.3%, 69.2%, and 21.5%, respectively. Our results demonstrated that grazing reduced carbon assimilation while increasing soil respiration within the rangelands in the Tianshan Mountains.
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spelling pubmed-49589232016-08-04 Effects of grazing on photosynthetic features and soil respiration of rangelands in the Tianshan Mountains of Northwest China Liu, Hua Zang, Runguo Chen, Han Y. H. Sci Rep Article Rangelands play a critical role in the global carbon cycle. However, the eco-physiological mechanisms associated with the effects of grazing on leaf photosynthesis and soil respiration remain poorly understood. To examine the impacts of grazing on leaf photosynthesis and soil respiration, we measured the photosynthetic parameters of the dominant species (Trifolium repens) and the soil respiration in grazed and ungrazed rangelands in the Tianshan Mountains of China. We found that grazing reduced the daily maximum net photosynthetic rate and soil respiration rates by 35% and 15%, respectively. The photosynthetic quantum yield, dark respiratory rate, and water use efficiency of T. repens leaves were reduced in grazed plots by 33.3%, 69.2%, and 21.5%, respectively. Our results demonstrated that grazing reduced carbon assimilation while increasing soil respiration within the rangelands in the Tianshan Mountains. Nature Publishing Group 2016-07-25 /pmc/articles/PMC4958923/ /pubmed/27452980 http://dx.doi.org/10.1038/srep30087 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Liu, Hua
Zang, Runguo
Chen, Han Y. H.
Effects of grazing on photosynthetic features and soil respiration of rangelands in the Tianshan Mountains of Northwest China
title Effects of grazing on photosynthetic features and soil respiration of rangelands in the Tianshan Mountains of Northwest China
title_full Effects of grazing on photosynthetic features and soil respiration of rangelands in the Tianshan Mountains of Northwest China
title_fullStr Effects of grazing on photosynthetic features and soil respiration of rangelands in the Tianshan Mountains of Northwest China
title_full_unstemmed Effects of grazing on photosynthetic features and soil respiration of rangelands in the Tianshan Mountains of Northwest China
title_short Effects of grazing on photosynthetic features and soil respiration of rangelands in the Tianshan Mountains of Northwest China
title_sort effects of grazing on photosynthetic features and soil respiration of rangelands in the tianshan mountains of northwest china
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4958923/
https://www.ncbi.nlm.nih.gov/pubmed/27452980
http://dx.doi.org/10.1038/srep30087
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