Edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community

Patchy degradation is a typical characteristic of grassland degradation. However, little is known about the responses of soil microbial community composition and richness to patchy degradation process, although soil microbes play important roles in the functioning of terrestrial ecosystems. Further,...

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Autores principales:	Xuan Zhao, Yueqing Song, Tongtong Xu, Man Xu, Jinting Cai, Ling Wang, Zhiqiang Li
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Grassland degradation Patchy degradation process Ecotone Rare taxa Competition Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/b20c0800f5724a8e9e379d333f77272f
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spelling	oai:doaj.org-article:b20c0800f5724a8e9e379d333f77272f2021-12-01T05:02:13ZEdge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community1470-160X10.1016/j.ecolind.2021.108307https://doaj.org/article/b20c0800f5724a8e9e379d333f77272f2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21009729https://doaj.org/toc/1470-160XPatchy degradation is a typical characteristic of grassland degradation. However, little is known about the responses of soil microbial community composition and richness to patchy degradation process, although soil microbes play important roles in the functioning of terrestrial ecosystems. Further, there is always a transitional area of vegetation between non-degraded and degraded patches (i.e. ecotone), but the characteristics of soil microbial communities at ecotone are not well understood. Here, we investigated spatial patterns of soil microbial composition and richness from non-degraded to degraded patch in a patchy degraded grassland of Northern China. The results showed that bacterial and fungal richness had contrast patterns during patchy degradation process. Bacterial richness increased while fungal richness decreased from non-degraded to degraded patch. Notably, soil bacteria had significant edge effects, characterized by more abundant bacterial taxa at ecotone compared with non-degraded and degraded patches, which was attributable to the release of competition from the lower dominant phylum-Actinobacteria abundance. Moreover, the relative abundance of rare taxa for bacteria and fungi consistently decreased during patchy degradation process, indicating a reduction of ecosystem function. Relative abundance of soil microbial rare taxa could be a good ecological indicator in responding to grassland degradation. Overall, our study revealed the spatial patterns of soil microbial community during patchy degradation process and the microbial characteristics at ecotone, which is crucial for mechanistic understanding of grassland degradation process, and also providing a theoretical basis for the development of grassland restoration strategy.Xuan ZhaoYueqing SongTongtong XuMan XuJinting CaiLing WangZhiqiang LiElsevierarticleGrassland degradationPatchy degradation processEcotoneRare taxaCompetitionEcologyQH540-549.5ENEcological Indicators, Vol 132, Iss , Pp 108307- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Grassland degradation Patchy degradation process Ecotone Rare taxa Competition Ecology QH540-549.5
spellingShingle	Grassland degradation Patchy degradation process Ecotone Rare taxa Competition Ecology QH540-549.5 Xuan Zhao Yueqing Song Tongtong Xu Man Xu Jinting Cai Ling Wang Zhiqiang Li Edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community
description	Patchy degradation is a typical characteristic of grassland degradation. However, little is known about the responses of soil microbial community composition and richness to patchy degradation process, although soil microbes play important roles in the functioning of terrestrial ecosystems. Further, there is always a transitional area of vegetation between non-degraded and degraded patches (i.e. ecotone), but the characteristics of soil microbial communities at ecotone are not well understood. Here, we investigated spatial patterns of soil microbial composition and richness from non-degraded to degraded patch in a patchy degraded grassland of Northern China. The results showed that bacterial and fungal richness had contrast patterns during patchy degradation process. Bacterial richness increased while fungal richness decreased from non-degraded to degraded patch. Notably, soil bacteria had significant edge effects, characterized by more abundant bacterial taxa at ecotone compared with non-degraded and degraded patches, which was attributable to the release of competition from the lower dominant phylum-Actinobacteria abundance. Moreover, the relative abundance of rare taxa for bacteria and fungi consistently decreased during patchy degradation process, indicating a reduction of ecosystem function. Relative abundance of soil microbial rare taxa could be a good ecological indicator in responding to grassland degradation. Overall, our study revealed the spatial patterns of soil microbial community during patchy degradation process and the microbial characteristics at ecotone, which is crucial for mechanistic understanding of grassland degradation process, and also providing a theoretical basis for the development of grassland restoration strategy.
format	article
author	Xuan Zhao Yueqing Song Tongtong Xu Man Xu Jinting Cai Ling Wang Zhiqiang Li
author_facet	Xuan Zhao Yueqing Song Tongtong Xu Man Xu Jinting Cai Ling Wang Zhiqiang Li
author_sort	Xuan Zhao
title	Edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community
title_short	Edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community
title_full	Edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community
title_fullStr	Edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community
title_full_unstemmed	Edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community
title_sort	edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/b20c0800f5724a8e9e379d333f77272f
work_keys_str_mv	AT xuanzhao edgeeffectsandspatialdegradationprocessinhighlyfragmentedgrasslandimpactonsoilmicrobialcommunity AT yueqingsong edgeeffectsandspatialdegradationprocessinhighlyfragmentedgrasslandimpactonsoilmicrobialcommunity AT tongtongxu edgeeffectsandspatialdegradationprocessinhighlyfragmentedgrasslandimpactonsoilmicrobialcommunity AT manxu edgeeffectsandspatialdegradationprocessinhighlyfragmentedgrasslandimpactonsoilmicrobialcommunity AT jintingcai edgeeffectsandspatialdegradationprocessinhighlyfragmentedgrasslandimpactonsoilmicrobialcommunity AT lingwang edgeeffectsandspatialdegradationprocessinhighlyfragmentedgrasslandimpactonsoilmicrobialcommunity AT zhiqiangli edgeeffectsandspatialdegradationprocessinhighlyfragmentedgrasslandimpactonsoilmicrobialcommunity
_version_	1718405621581086720

Edge effects and spatial degradation process in highly fragmented grassland – impact on soil microbial community

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