lichen crust

基本解釋

The crust type along the sampling line are algae, lichen and moss, respectively, which are consistent with soil nutrient and disturbance number.
隨公路里程增加，生物結(jié)皮呈現(xiàn)從地衣苔蘚藻類地衣地衣苔蘚的過渡，這與土壤養(yǎng)分條件和干擾因子數(shù)相對(duì)應(yīng)。
Under the same destruction percentage moss crust has the highest threshold velocity, followed by lichen crust, algal and algal-lichen crusts in succession.
相同破損率條件下，起動(dòng)風(fēng)速以苔蘚結(jié)皮最大、地衣結(jié)皮次之、藻結(jié)皮和藻類地衣結(jié)皮最小。

The changes in the weather create a crust of hard ice over the lichen, preventing the reindeer from eating.
UNESCO: On the frontlines of climate change: Sami reindeer herders