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Effects of sampling method on foliar δ(13)C of Leymus chinensis at different scales

Stable carbon isotope composition (δ(13)C) usually shows a negative relationship with precipitation at a large scale. We hypothesized that sampling method affects foliar δ(13)C and its response pattern to precipitation. We selected 11 sites along a precipitation gradient in Inner Mongolia and collec...

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Autores principales: Liu, Yanjie, Li, Yan, Zhang, Lirong, Xu, Xingliang, Niu, Haishan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BlackWell Publishing Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4364821/
https://www.ncbi.nlm.nih.gov/pubmed/25798224
http://dx.doi.org/10.1002/ece3.1401
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author Liu, Yanjie
Li, Yan
Zhang, Lirong
Xu, Xingliang
Niu, Haishan
author_facet Liu, Yanjie
Li, Yan
Zhang, Lirong
Xu, Xingliang
Niu, Haishan
author_sort Liu, Yanjie
collection PubMed
description Stable carbon isotope composition (δ(13)C) usually shows a negative relationship with precipitation at a large scale. We hypothesized that sampling method affects foliar δ(13)C and its response pattern to precipitation. We selected 11 sites along a precipitation gradient in Inner Mongolia and collected leaves of Leymus chinensis with five or six replications repeatedly in each site from 2009 to 2011. Additionally, we collected leaves of L. chinensis separately from two types of grassland (grazed and fenced) in 2011. Foliar δ(13)C values of all samples were measured. We compared the patterns that foliar δ(13)C to precipitation among different years or different sample sizes, the differences of foliar δ(13)C between grazed and fenced grassland. Whether actual annual precipitation (AAP) or mean annual precipitation (MAP), it was strongly correlated with foliar δ(13)C every year. Significant difference was found between the slopes of foliar δ(13)C to AAP and MAP every year, among the slopes of foliar δ(13)C to AAP from 2009 to 2011. The more samples used at each site the lower and convergent P-values of the linear regression test between foliar δ(13)C and precipitation. Furthermore, there was significant lower foliar δ(13)C value in presence of grazed type than fenced type grassland. These findings provide evidence that there is significant effect of sampling method to foliar δ(13)C and its response pattern to precipitation of L. chinensis. Our results have valuable implications in methodology for future field sampling studies.
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spelling pubmed-43648212015-03-20 Effects of sampling method on foliar δ(13)C of Leymus chinensis at different scales Liu, Yanjie Li, Yan Zhang, Lirong Xu, Xingliang Niu, Haishan Ecol Evol Original Research Stable carbon isotope composition (δ(13)C) usually shows a negative relationship with precipitation at a large scale. We hypothesized that sampling method affects foliar δ(13)C and its response pattern to precipitation. We selected 11 sites along a precipitation gradient in Inner Mongolia and collected leaves of Leymus chinensis with five or six replications repeatedly in each site from 2009 to 2011. Additionally, we collected leaves of L. chinensis separately from two types of grassland (grazed and fenced) in 2011. Foliar δ(13)C values of all samples were measured. We compared the patterns that foliar δ(13)C to precipitation among different years or different sample sizes, the differences of foliar δ(13)C between grazed and fenced grassland. Whether actual annual precipitation (AAP) or mean annual precipitation (MAP), it was strongly correlated with foliar δ(13)C every year. Significant difference was found between the slopes of foliar δ(13)C to AAP and MAP every year, among the slopes of foliar δ(13)C to AAP from 2009 to 2011. The more samples used at each site the lower and convergent P-values of the linear regression test between foliar δ(13)C and precipitation. Furthermore, there was significant lower foliar δ(13)C value in presence of grazed type than fenced type grassland. These findings provide evidence that there is significant effect of sampling method to foliar δ(13)C and its response pattern to precipitation of L. chinensis. Our results have valuable implications in methodology for future field sampling studies. BlackWell Publishing Ltd 2015-03 2015-02-09 /pmc/articles/PMC4364821/ /pubmed/25798224 http://dx.doi.org/10.1002/ece3.1401 Text en © 2015 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. http://creativecommons.org/licenses/by/4.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Liu, Yanjie
Li, Yan
Zhang, Lirong
Xu, Xingliang
Niu, Haishan
Effects of sampling method on foliar δ(13)C of Leymus chinensis at different scales
title Effects of sampling method on foliar δ(13)C of Leymus chinensis at different scales
title_full Effects of sampling method on foliar δ(13)C of Leymus chinensis at different scales
title_fullStr Effects of sampling method on foliar δ(13)C of Leymus chinensis at different scales
title_full_unstemmed Effects of sampling method on foliar δ(13)C of Leymus chinensis at different scales
title_short Effects of sampling method on foliar δ(13)C of Leymus chinensis at different scales
title_sort effects of sampling method on foliar δ(13)c of leymus chinensis at different scales
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4364821/
https://www.ncbi.nlm.nih.gov/pubmed/25798224
http://dx.doi.org/10.1002/ece3.1401
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