关键词: 数学表达, 植被指数, 时间趋势, 遥感, 植被物候

Abstract: The floral composition and ecological habits of polypores from Hainan Province were evaluated. Polypores were very rich in the province, and 242 species belonging to 7 orders, 17 families and 84 genera were found. The dominant families were the Polyporaceae, Hymenochaetaceae and Ganodermataceae, the dominant genera were Phellinus, Ganoderma and Polyporus, and 28, 14 and 13 species were respectively found in these genera. The majority of the polypores in Hainan were the pantropical elements and the northern temperate elements, showing distinct pantropical characteristics of floral composition. Among the 242 polypores, 102, 95 and 45 species were respectively considered as the common, occasional and rare species; 225 species were found on angiosperm wood and 38 species live on gymnosperm wood, while 21 species occur on both angiosperm and gymnosperm wood. Ecologically, these polypores can be divided into three types: Saprophytic (218 species), parasitic (20 species) and symbiotic (4 species); 225 species cause white rot and 17 species cause brown rot.

Key words: vegetation phenology, vegetation index, temporal trend., mathematical expression, remote sensing