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Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe

BACKGROUND: Grazing disturbance plays an important role in the desert steppe ecosystem in Inner Mongolia, China. Previous studies found that grazing affected the spatial distribution of species in a community, and showed patchiness characteristics of species under different grazing treatments. Artem...

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Autores principales: Wang, Zihan, Lv, Shijie, Han, Guodong, Wang, Zhongwu, Li, Zhiguo, Ren, Haiyan, Wang, Jing, Sun, Hailian, Zhang, Guogang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9281028/
https://www.ncbi.nlm.nih.gov/pubmed/35831803
http://dx.doi.org/10.1186/s12870-022-03712-8
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author Wang, Zihan
Lv, Shijie
Han, Guodong
Wang, Zhongwu
Li, Zhiguo
Ren, Haiyan
Wang, Jing
Sun, Hailian
Zhang, Guogang
author_facet Wang, Zihan
Lv, Shijie
Han, Guodong
Wang, Zhongwu
Li, Zhiguo
Ren, Haiyan
Wang, Jing
Sun, Hailian
Zhang, Guogang
author_sort Wang, Zihan
collection PubMed
description BACKGROUND: Grazing disturbance plays an important role in the desert steppe ecosystem in Inner Mongolia, China. Previous studies found that grazing affected the spatial distribution of species in a community, and showed patchiness characteristics of species under different grazing treatments. Artemisia frigida is the dominant species and semi-shrub in desert steppe, and whether grazing interference will affect the spatial distribution of A. frigida is studied. In this study, geo-statistical methods were mainly used to study the spatial distribution characteristics of A. frigida population in desert steppe of Inner Mongolia at two scales (quadrat size 2.5 m × 2.5 m, 5 m × 5 m) and four stocking rates (control, CK, 0 sheep·ha(–1)·month(–1); light grazing, LG, 0.15 sheep·ha(–1)·month(–1), moderate grazing, MG, 0.30 sheep·ha(–1)·month(–1), heavy grazing, HG, 0.45 sheep·ha(–1)·month(–1)). RESULTS: The results showed that the spatial distribution of A. frigida tended to be simplified with the increase of stocking rate, and tended to be banded with increased spatial scale. The density and height of A. frigida increased with increasing scale. With increased stocking rate, the density of A. frigida population decreased linearly, while its height decreased in a step-wise fashion. The spatial distribution of A. frigida was mainly affected by structural factors at different scales and stocking rate. The density of A. frigida was more sensitive to change in stocking rate, and the patchiness distribution of A. frigida was more obvious with increase in scale. CONCLUSIONS: Stocking rate has a strong regulatory effect on the spatial pattern of A. frigida population in the desert steppe. Heavy grazing reduced the spatial heterogeneity of A. frigida in the desert steppe. The smaller dominant populations are unfavourable for its survival in heavy grazing condition, and affects the stability and productivity of the grassland ecosystem. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12870-022-03712-8.
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spelling pubmed-92810282022-07-15 Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe Wang, Zihan Lv, Shijie Han, Guodong Wang, Zhongwu Li, Zhiguo Ren, Haiyan Wang, Jing Sun, Hailian Zhang, Guogang BMC Plant Biol Research BACKGROUND: Grazing disturbance plays an important role in the desert steppe ecosystem in Inner Mongolia, China. Previous studies found that grazing affected the spatial distribution of species in a community, and showed patchiness characteristics of species under different grazing treatments. Artemisia frigida is the dominant species and semi-shrub in desert steppe, and whether grazing interference will affect the spatial distribution of A. frigida is studied. In this study, geo-statistical methods were mainly used to study the spatial distribution characteristics of A. frigida population in desert steppe of Inner Mongolia at two scales (quadrat size 2.5 m × 2.5 m, 5 m × 5 m) and four stocking rates (control, CK, 0 sheep·ha(–1)·month(–1); light grazing, LG, 0.15 sheep·ha(–1)·month(–1), moderate grazing, MG, 0.30 sheep·ha(–1)·month(–1), heavy grazing, HG, 0.45 sheep·ha(–1)·month(–1)). RESULTS: The results showed that the spatial distribution of A. frigida tended to be simplified with the increase of stocking rate, and tended to be banded with increased spatial scale. The density and height of A. frigida increased with increasing scale. With increased stocking rate, the density of A. frigida population decreased linearly, while its height decreased in a step-wise fashion. The spatial distribution of A. frigida was mainly affected by structural factors at different scales and stocking rate. The density of A. frigida was more sensitive to change in stocking rate, and the patchiness distribution of A. frigida was more obvious with increase in scale. CONCLUSIONS: Stocking rate has a strong regulatory effect on the spatial pattern of A. frigida population in the desert steppe. Heavy grazing reduced the spatial heterogeneity of A. frigida in the desert steppe. The smaller dominant populations are unfavourable for its survival in heavy grazing condition, and affects the stability and productivity of the grassland ecosystem. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12870-022-03712-8. BioMed Central 2022-07-13 /pmc/articles/PMC9281028/ /pubmed/35831803 http://dx.doi.org/10.1186/s12870-022-03712-8 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Wang, Zihan
Lv, Shijie
Han, Guodong
Wang, Zhongwu
Li, Zhiguo
Ren, Haiyan
Wang, Jing
Sun, Hailian
Zhang, Guogang
Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe
title Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe
title_full Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe
title_fullStr Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe
title_full_unstemmed Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe
title_short Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe
title_sort heavy grazing reduced the spatial heterogeneity of artemisia frigida in desert steppe
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9281028/
https://www.ncbi.nlm.nih.gov/pubmed/35831803
http://dx.doi.org/10.1186/s12870-022-03712-8
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