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地衣是真菌和藻类共生的藻菌植物,它具一定的形态、结构和生态习性,并产生特殊的化学物质,这是真菌和藻类原本所没有的。地衣是一个独立的类群,属地衣门(Lichenes)。它们生活在各种环境中,特别是能耐干、寒,在裸岩悬壁、树干、土壤以及极地苔原和高山寒漠都有分布,是植物界拓荒的先锋。地衣对自然环境有重要的影响。在贺兰山自然保护区低山、沟
Lichens are algal-bacterial plants that are symbiotic to fungi and algae. They have certain forms, structures, and ecological habits, and produce special chemicals that are not originally found in fungi and algae. Lichens are an independent group and belong to Lichenes. They live in a variety of environments, and in particular they are able to withstand dryness and coldness. They are distributed on the bare rock cliffs, trunks, soils, and polar tundra and alpine chilly deserts. They are pioneers of the pioneering of the plant community. Lichens have an important influence on the natural environment. Low mountain and ditch in Helan Mountain Nature Reserve