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Primary Productivity and Precipitation-Use Efficiency in Temperate Grassland in the Loess Plateau of China

Clarifying spatial variations in aboveground net primary productivity (ANPP) and precipitation-use efficiency (PUE) of grasslands is critical for effective prediction of the response of terrestrial ecosystem carbon and water cycle to future climate change. Though the combination use of remote sensin...

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Autores principales: Jia, Xiaoxu, Xie, Baoni, Shao, Ming’an, Zhao, Chunlei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4546544/
https://www.ncbi.nlm.nih.gov/pubmed/26295954
http://dx.doi.org/10.1371/journal.pone.0135490
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author Jia, Xiaoxu
Xie, Baoni
Shao, Ming’an
Zhao, Chunlei
author_facet Jia, Xiaoxu
Xie, Baoni
Shao, Ming’an
Zhao, Chunlei
author_sort Jia, Xiaoxu
collection PubMed
description Clarifying spatial variations in aboveground net primary productivity (ANPP) and precipitation-use efficiency (PUE) of grasslands is critical for effective prediction of the response of terrestrial ecosystem carbon and water cycle to future climate change. Though the combination use of remote sensing products and in situ ANPP measurements, we quantified the effects of climatic [mean annual precipitation (MAP) and precipitation seasonal distribution (PSD)], biotic [leaf area index (LAI)] and abiotic [slope gradient, aspect, soil water storage (SWS) and other soil physical properties] factors on the spatial variations in ANPP and PUE across different grassland types (i.e., meadow steppe, typical steppe and desert steppe) in the Loess Plateau. Based on the study, ANPP increased exponentially with MAP for the entire temperate grassland; suggesting that PUE increased with increasing MAP. Also PSD had a significant effect on ANPP and PUE; where more even PSD favored higher ANPP and PUE. Then MAP, more than PSD, explained spatial variations in typical steppe and desert steppe. However, PSD was the dominant driving factor of spatial variations in ANPP of meadow steppe. This suggested that in terms of spatial variations in ANPP of meadow steppe, change in PSD due to climate change was more important than that in total annual precipitation. LAI explained 78% of spatial PUE in the entire Loess Plateau temperate grassland. As such, LAI was the primary driving factor of spatial variations in PUE. Although the effect of SWS on ANPP and PUE was significant, it was nonetheless less than that of precipitation and vegetation. We therefore concluded that changes in vegetation structure and consequently in LAI and/or altered pattern of seasonal distribution of rainfall due to global climate change could significantly influence ecosystem carbon and water cycle in temperate grasslands.
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spelling pubmed-45465442015-09-01 Primary Productivity and Precipitation-Use Efficiency in Temperate Grassland in the Loess Plateau of China Jia, Xiaoxu Xie, Baoni Shao, Ming’an Zhao, Chunlei PLoS One Research Article Clarifying spatial variations in aboveground net primary productivity (ANPP) and precipitation-use efficiency (PUE) of grasslands is critical for effective prediction of the response of terrestrial ecosystem carbon and water cycle to future climate change. Though the combination use of remote sensing products and in situ ANPP measurements, we quantified the effects of climatic [mean annual precipitation (MAP) and precipitation seasonal distribution (PSD)], biotic [leaf area index (LAI)] and abiotic [slope gradient, aspect, soil water storage (SWS) and other soil physical properties] factors on the spatial variations in ANPP and PUE across different grassland types (i.e., meadow steppe, typical steppe and desert steppe) in the Loess Plateau. Based on the study, ANPP increased exponentially with MAP for the entire temperate grassland; suggesting that PUE increased with increasing MAP. Also PSD had a significant effect on ANPP and PUE; where more even PSD favored higher ANPP and PUE. Then MAP, more than PSD, explained spatial variations in typical steppe and desert steppe. However, PSD was the dominant driving factor of spatial variations in ANPP of meadow steppe. This suggested that in terms of spatial variations in ANPP of meadow steppe, change in PSD due to climate change was more important than that in total annual precipitation. LAI explained 78% of spatial PUE in the entire Loess Plateau temperate grassland. As such, LAI was the primary driving factor of spatial variations in PUE. Although the effect of SWS on ANPP and PUE was significant, it was nonetheless less than that of precipitation and vegetation. We therefore concluded that changes in vegetation structure and consequently in LAI and/or altered pattern of seasonal distribution of rainfall due to global climate change could significantly influence ecosystem carbon and water cycle in temperate grasslands. Public Library of Science 2015-08-21 /pmc/articles/PMC4546544/ /pubmed/26295954 http://dx.doi.org/10.1371/journal.pone.0135490 Text en © 2015 Jia et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Jia, Xiaoxu
Xie, Baoni
Shao, Ming’an
Zhao, Chunlei
Primary Productivity and Precipitation-Use Efficiency in Temperate Grassland in the Loess Plateau of China
title Primary Productivity and Precipitation-Use Efficiency in Temperate Grassland in the Loess Plateau of China
title_full Primary Productivity and Precipitation-Use Efficiency in Temperate Grassland in the Loess Plateau of China
title_fullStr Primary Productivity and Precipitation-Use Efficiency in Temperate Grassland in the Loess Plateau of China
title_full_unstemmed Primary Productivity and Precipitation-Use Efficiency in Temperate Grassland in the Loess Plateau of China
title_short Primary Productivity and Precipitation-Use Efficiency in Temperate Grassland in the Loess Plateau of China
title_sort primary productivity and precipitation-use efficiency in temperate grassland in the loess plateau of china
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4546544/
https://www.ncbi.nlm.nih.gov/pubmed/26295954
http://dx.doi.org/10.1371/journal.pone.0135490
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