首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Microalgal species variation at different successional stages in biological soil crusts of the Gurbantunggut Desert,Northwestern China
Authors:Bingchang Zhang  Yuanming Zhang  Jiancheng Zhao  Nan Wu  Rongyi Chen  Jing Zhang
Institution:(1) Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, CAS, Urumqi, 830011, China;(2) College of Life Sciences, Hebei Normal University, Shijiazhuang, 050016, China;(3) Graduate University of Chinese Academy of Sciences, Beijing, 100039, China;(4) Urumqi Institute of Desert Meteorology, China Meteorological Administration, Urumqi, 830002, China
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.
Keywords:Gurbantunggut Desert  Biological soil crusts  Successional stages  Microalgal crusts
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号