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Above- and Belowground Biomass Allocation in Shrub Biomes across the Northeast Tibetan Plateau

Biomass partitioning has been explored across various biomes. However, the strategies of allocation in plants still remain contentious. This study investigated allocation patterns of above- and belowground biomass at the community level, using biomass survey from the Tibetan Plateau. We explored abo...

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Autores principales: Nie, Xiuqing, Yang, Yuanhe, Yang, Lucun, Zhou, Guoying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4847786/
https://www.ncbi.nlm.nih.gov/pubmed/27119379
http://dx.doi.org/10.1371/journal.pone.0154251
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author Nie, Xiuqing
Yang, Yuanhe
Yang, Lucun
Zhou, Guoying
author_facet Nie, Xiuqing
Yang, Yuanhe
Yang, Lucun
Zhou, Guoying
author_sort Nie, Xiuqing
collection PubMed
description Biomass partitioning has been explored across various biomes. However, the strategies of allocation in plants still remain contentious. This study investigated allocation patterns of above- and belowground biomass at the community level, using biomass survey from the Tibetan Plateau. We explored above- and belowground biomass by conducting three consecutive sampling campaigns across shrub biomes on the northeast Tibetan Plateau during 2011–2013. We then documented the above-ground biomass (AGB), below-ground biomass (BGB) and root: shoot ratio (R/S) and the relationships between R/S and environment factors using data from 201 plots surveyed from 67 sites. We further examined relationships between above-ground and below-ground biomass across various shrub types. Our results indicated that the median values of AGB, BGB, and R/S in Tibetan shrub were 1102.55, 874.91 g m(-2), and 0.85, respectively. R/S showed significant trend with mean annual precipitation (MAP), while decreased with mean annual temperature (MAT). Reduced major axis analysis indicated that the slope of the log-log relationship between above- and belowground biomass revealed a significant difference from 1.0 over space, supporting the optimal hypothesis. Interestingly, the slopes of the allometric relationship between log AGB and log BGB differed significantly between alpine and desert shrub. Our findings supported the optimal theory of above- and belowground biomass partitioning in Tibetan shrub, while the isometric hypothesis for alpine shrub at the community level.
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spelling pubmed-48477862016-05-07 Above- and Belowground Biomass Allocation in Shrub Biomes across the Northeast Tibetan Plateau Nie, Xiuqing Yang, Yuanhe Yang, Lucun Zhou, Guoying PLoS One Research Article Biomass partitioning has been explored across various biomes. However, the strategies of allocation in plants still remain contentious. This study investigated allocation patterns of above- and belowground biomass at the community level, using biomass survey from the Tibetan Plateau. We explored above- and belowground biomass by conducting three consecutive sampling campaigns across shrub biomes on the northeast Tibetan Plateau during 2011–2013. We then documented the above-ground biomass (AGB), below-ground biomass (BGB) and root: shoot ratio (R/S) and the relationships between R/S and environment factors using data from 201 plots surveyed from 67 sites. We further examined relationships between above-ground and below-ground biomass across various shrub types. Our results indicated that the median values of AGB, BGB, and R/S in Tibetan shrub were 1102.55, 874.91 g m(-2), and 0.85, respectively. R/S showed significant trend with mean annual precipitation (MAP), while decreased with mean annual temperature (MAT). Reduced major axis analysis indicated that the slope of the log-log relationship between above- and belowground biomass revealed a significant difference from 1.0 over space, supporting the optimal hypothesis. Interestingly, the slopes of the allometric relationship between log AGB and log BGB differed significantly between alpine and desert shrub. Our findings supported the optimal theory of above- and belowground biomass partitioning in Tibetan shrub, while the isometric hypothesis for alpine shrub at the community level. Public Library of Science 2016-04-27 /pmc/articles/PMC4847786/ /pubmed/27119379 http://dx.doi.org/10.1371/journal.pone.0154251 Text en © 2016 Nie 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 (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Nie, Xiuqing
Yang, Yuanhe
Yang, Lucun
Zhou, Guoying
Above- and Belowground Biomass Allocation in Shrub Biomes across the Northeast Tibetan Plateau
title Above- and Belowground Biomass Allocation in Shrub Biomes across the Northeast Tibetan Plateau
title_full Above- and Belowground Biomass Allocation in Shrub Biomes across the Northeast Tibetan Plateau
title_fullStr Above- and Belowground Biomass Allocation in Shrub Biomes across the Northeast Tibetan Plateau
title_full_unstemmed Above- and Belowground Biomass Allocation in Shrub Biomes across the Northeast Tibetan Plateau
title_short Above- and Belowground Biomass Allocation in Shrub Biomes across the Northeast Tibetan Plateau
title_sort above- and belowground biomass allocation in shrub biomes across the northeast tibetan plateau
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4847786/
https://www.ncbi.nlm.nih.gov/pubmed/27119379
http://dx.doi.org/10.1371/journal.pone.0154251
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