青藏高原东北部高寒草甸群落的扩散谱研究

his study focused on the dispersal spectra of the flora of eastern of Qinghai-Tibet plateau. One hundred and forty six herbaceous plant species at the first turn of Yellow River on the eastern of Qinghai-Tibet plateau were included. Dispersal modes were determined by the morphologies of dispersion units, and an extensive literature review. The dispersal spectrum was constructed with species counts and cover. Autochory was the most important seed dispersal mode. The wind dispersed species in the lower stratum were more than those in the upper stratum. The percentage of autochorous species with clonal growth was higher than that of autochorous species without clonal growth, but the percentage of anemochorous species with clonal growth was lower than that of anemochorous species without clonal growth. Our results showed the dispersal spectrum of the alpine meadow was influenced by specific environmental circumstances and floristic composition, and was greatly different from other vegetations’ spectra.