格姆滩高寒草甸不同草地植被地上生物量及物种多样性研究

Study of Biomass of Above-Ground and Species Diversity at Different Vegetation Types on Alpine Meadow in Gemutan

研究了格姆滩高寒草甸不同草地植被地上生物量及物种多样性,结果表明:地上总生物量为藏嵩草沼泽化草甸>山生柳灌丛草甸>小嵩草草甸(P<0.05)。藏嵩草沼泽化草甸由24种植物组成,隶属13科22属;小嵩草草甸由36种植物组成,隶属16科31属;山生柳灌丛草甸草层由42种植物组成,隶属13科31属。不同草地类型植物群落多样性指数、物种丰富度指数、均匀度指数、生态优势度指数均为山生柳灌丛草甸草层>小嵩草草甸>藏嵩草沼泽化草甸,植被盖度山生柳灌丛草甸草层>藏嵩草沼泽化草甸>小嵩草草甸。

Biomass of above-ground and species Diversity at different vegetation types on alpine meadow in Gemutan were determined.The results showed that total biomass of above-ground presented the pattern like this：Kobresia tibetica swamp meadow Salix oritrepha shrub meadowK.pygmaca meadow（P0.05）.K.tibetica swamp meadow consisted of 24 plant species,which belonged to 13 genera of 22 families respectively;K.pygmaca meadow consisted of 36 plant species,which belonged to 16 genera of 31 families respectively;Salix oritrepha shrub meadow consisted of 42 plant species,which belonged to 13 genera of 31 families respectively.All indexs（Shannon-wienner index、abundance index、evenness index and Simpson index）showed the pattern like this：Salix oritrepha shrub meadowK.pygmaca meadowK.tibetica swamp meadow.Vegetation coverage showed the pattern like this：Salix oritrepha shrub meadowK.tibetica swamp meadowK.pygmaca meadow.