Analysis of environmental factors determining development and succession in biological soil crusts

The Science of the Total Environment
Shubin LanChunxiang Hu

Abstract

Biological soil crusts play important ecological functions in arid and semi-arid regions, while different crust successional patterns appeared in different regions. Therefore in this study, the environmental conditions between Shapotou (with cyanobacterial, lichen and moss crusts) and Dalate Banner (with only cyanobacterial and moss crusts) regions of China were compared to investigate why lichen crusts only appeared in Shapotou; at the same time, artificial moss inoculation was conducted to find out the environmental factors promoting crust succession to moss stage. The results showed lichen crusts always developed from cyanobacterial crusts, which provide not only the stable soil surface, but also the biomass basis for lichen formation; furthermore, addition of crust physicochemical characteristics (primarily silt content) play a facilitating effect on lichen emergence (R(2)=0.53). The inoculation experiment demonstrated early crust soil surface and enough water holding content (>4%) provided the essential guarantee for moss germination. Our results show that there is heterogeneity in crust succession in different regions, which may be mainly affected by the ambient soil microenvironments. It is concluded that a positive feed...Continue Reading

Citations

Dec 1, 2017·Ecology and Evolution·Guang SongRong Hui
Jun 30, 2019·Environmental Science and Pollution Research International·Xiang GaoBin Liu
Apr 6, 2021·Frontiers in Microbiology·Qiong WangChunxiang Hu

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