semi-arid land ecosystems
... 沙丘Sand dunes 半干旱地区生态系统Semi-arid land ecosystems 森林生态系统Forest ecosystems ...
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生物土壤结皮广泛分布在干旱半干旱地区与寒区荒漠，是荒漠生态系统的主要组成和景观特征之一，其重要性已被大量的研究报道所证实。
Soil microbiotic crusts are widespread in arid and semiarid regions, they are one of the major components of desert ecosystems, and their importance has been demonstrated by numerous researches.
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