Effects of Grazing Exclusion on the Composition and Structure of Steppe Communities dominated by<i>Caragana microphylla</i>

Tingting, 赵婷婷 Zhao; Nianxi, 赵念席 Zhao; Yubao, 高玉葆 Gao

doi:10.5846/stxb201212181816

Cited by 1 publication

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References 6 publications

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“…As for a shrub-encroached grassland, the presence of shrubs and their influences on local environment would lead to significant different restoration processes compared with a non-encroached degraded grassland (Eldridge et al, 2011;Zhao, Zhao, & Gao, 2014;Zhou, Boutton, & Wu, 2018). First of all, it is difficult to restore the shrubencroached grassland to its predegradation state by just removing the interfering factors.…”

Section: Introductionmentioning

confidence: 99%

Shrub‐encroached grassland as an alternative stable state in semiarid steppe regions: Evidence from community stability and assembly

Hao

Yang

et al. 2021

Land Degrad Dev

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Understanding community restoration state and assembly mechanisms is helpful to assess restoration measures and predict community dynamics. In order to explore the effects of fencing duration and shrub cover on community stability and assembly, we investigated the community information and assessed the assembly mechanisms in plots using shrub cover of Caragana microphylla within each of the three sites fenced since 1979, 1983, and 2003 in a semiarid steppe region of China. Community composition was different among various fencing duration or shrub cover treatments. Shrub cover had a positive effect, and fencing duration had a negative effect on community stability, and both had indirect effects via regulating vegetation cover. Both shrub cover and fencing duration influenced phylogenetic structure directly and negatively, and indirectly via regulating Simpson's diversity and vegetation cover. Considering that the functional traits were phylogenetically convergent, community assembly mechanisms assessed by the values of phylogenetic structure shifted from stochasticity to competitive exclusion with the increase of shrub cover and fencing duration, and competitive exclusion dominated community assembly in the plots of low or high shrub cover in the site of fencing since 1979. The responses of community stability and community assembly to the changes of shrub cover and fencing duration suggest that the shrub‐encroached grassland is an alternative stable community state in semiarid steppe regions. Therefore, it is essential to distinguish shrub‐encroached grasslands from non‐encroached degraded grasslands when formulating relevant conservation and management measures in similar regions.

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Section: Introductionmentioning

confidence: 99%

Shrub‐encroached grassland as an alternative stable state in semiarid steppe regions: Evidence from community stability and assembly

Hao

Yang

et al. 2021

Land Degrad Dev

View full text Add to dashboard Cite

show abstract

Effects of Grazing Exclusion on the Composition and Structure of Steppe Communities dominated byCaragana microphylla

Abstract: Zhao T T, Zhao N X, Gao Y B.Effects of grazing exclusion on the composition and structure of steppe communities dominated by Caragana microphylla.Acta

Cited by 1 publication

References 6 publications

Shrub‐encroached grassland as an alternative stable state in semiarid steppe regions: Evidence from community stability and assembly

Shrub‐encroached grassland as an alternative stable state in semiarid steppe regions: Evidence from community stability and assembly

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