期刊
SOIL BIOLOGY & BIOCHEMISTRY
卷 116, 期 -, 页码 67-69出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2017.10.002
关键词
Biological soil crusts; Matric potential; Cyanobacteria; Extracellular polymeric substances; Drylands
类别
资金
- COST Action [ES1104, COST-STSM-ECOST-STSM-ES1104-080614-048490, COST-STSM-ECOST-STSM-ES1104-200415-056089]
Biological Soil Crusts (BSCs) represent an important part of the living cover in drylands worldwide. BCSs change soil hydrology due to extracellular polymeric substances (EPS)-excreting species of cyanobacteria, dominant members of dryland-BSCs. The presence of EPS allowed matric potential (Psi(m)) to remain unchanged down to 20% water content, whereas, without EPS, Psi(m) started decreasing at 80% water content. The EPS matrix improved the water retaining capacity of soil, suggesting that BSCs would delay onset of restrictive matric potential values due to its larger water holding capacity.
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