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- Title
Microalgal species variation at different successional stages in biological soil crusts of the Gurbantunggut Desert, Northwestern China.
- Authors
Yuanming Zhang; Jiancheng Zhao; Nan Wu; Rongyi Chen
- Abstract
Abstract Biological soil crusts (BSC), most notably lichen crusts, develop and diversify in the Gurbantunggut Desert, the largest fixed and semi-fixed desert in China. Four different successional stages of BSC, including bare sand, microalgal crusts, lichen crusts, and moss crusts, were selected to determine successional changes in microalgal species composition and biomass and formation of BSC. A 10 × 10-m observation plot was established in an interdune region of the Gurbantunggut Desert and data were collected over an 8-year study period. The main results were: (1) different successional stages of BSC significantly affected the content of soil organic C and total and available N but not the total and available P and K content of soil; (2) composition of microalgal communities differed among the four successional stages; (3) significant differences in microalgal biomass were observed among the four successional stages; (4) bare sand was mainly uncompacted sand gains; (5) filamentous cyanobacteria, particularly Microcoleus vaginatus, were the dominant species in the early phase of crust succession. The presence of fungal mycelium and moss rhizoids prevented water and wind erosion.
- Subjects
CHINA; SOIL crusting; SOIL physics; BIOMASS
- Publication
Biology & Fertility of Soils, 2009, Vol 45, Issue 5, p539
- ISSN
0178-2762
- Publication type
Article
- DOI
10.1007/s00374-009-0364-0