the soil seed bank decreased in watershed. compared with perennial herb community, the similarity coefficient was higher in annual herb community between aboveground vegetation and soil seed bank.
地表植被与土壤种子库相似性系数以一年生草本植物为主的群落高,多年生草本植物为主的群落相似性系数低;
east indian sparsely prickly annual herb or perennial subshrub widely cultivated for its fleshy calyxes used in tarts and jelly and for its bast fiber.