摘要
土壤生物结皮是由细菌、真菌、藻类、地衣和苔藓等形成的一种混合体,作为干旱半干旱地区生态系统的组成部分,它对生态系统镶嵌格局和生态过程有不可忽视的影响;同时,土壤生物结皮通过影响局部水分条件,可以起到稳定土壤表层、减少土壤侵蚀、增加土壤氮养分的作用:因此,土壤生物结皮能够为土壤表层提供一种天然保护的作用,对干旱半干旱地区退化生态系统的恢复具有非常重要的作用。
Biological soil crusts are built up by cyanobacteria, green algae, soil lichens, mosses and fungi. They are important communities in arid and semi-arid ecosystems and influence the ecosystem mosaic and processes. In addition to the influence on the hydrological conditions, the biological crust also stabilises the topsoil, reduces soil erosion, and enhances the nitrogen pools by nitrogen fixation. The crusts are important for the rehabilitation of desertified arid and semi-arid lands and provide a natural protective soil surface cover.
出处
《中国水土保持科学》
CSCD
2005年第4期42-47,共6页
Science of Soil and Water Conservation
基金
The research was supported by the Sino-German Agricultural Cooperation(BMVEL)German Minsitry of Science(BMBF)
关键词
荒漠化防治
恢复
沙丘
生物结皮
细菌
combating desertification
restoration
sand dunes
cryptogamic crusts
cyanobacteria
