摘要
【目的】了解藏东南色季拉山东、西坡向高寒草甸植被的群落特征。【方法】以藏东南色季拉山东、西坡高寒草甸区为研究对象,探究高寒草甸的物种组成、多样性及生物量特征。【结果】色季拉山东、西坡高寒草甸研究区共调查到种子植物53种,隶属于22科37属,以菊科最占优势,占所有植物种类的18.87%。草甸植物群落Shannon-Wiener指数平均值为3.23,Margalef指数平均值为4.79,Pielou指数平均值为0.90,各指数均表现为西坡>东坡,且差异显著(P<0.05)该区域草甸群落总生物量为443.24~626.14 g/m^(2),地上生物量为153.12~253.03 g/m^(2),地下生物量为290.12~373.16 g/m^(2),以丛生荽叶委陵菜(Potentilla coriandrifolia D.D)+圆穗蓼(Polygonum macrophyllum D.D)群丛为主的东坡生物量(626.14 g/m^(2))高于以珠芽蓼(Polygonum viviparum L.)+大花嵩草(Kobresia macrantha Bocklr.)群丛为代表的西坡生物量(443.24 g/m^(2)),差异性显著(P<0.05),同时东坡优势种的生物量对植被总生物量的贡献高于西坡。【结论】该区域草甸植物区系地理成分复杂,具有明显的温带特征,西坡群落物种分布较东坡更均衡,物种多样性更丰富,东坡高寒草甸群落及优势种生物量更高。研究结果可为色季拉山高寒草甸植被群落可持续发展和生产力水平提供科学依据。
【Objective】To understand the biomass characteristics of alpine meadow in the east and west slope of the Sygera Mountain.【Method】Through the study of alpine meadow area in the east and west slope of Sygera Mountain,research on the plant species composition,diversity characteristics,and biomass of the aforementioned area.【Result】53 species of Spermatophyta belonging to 37 genus and 22 families are found in the area mentioned above,from which Compositae Plants dominate,accounting for 18.87%;the Average Number of Shannon Wiener index,Margalef index and Pielou index are 3.23,4.79 and 0.90 respectively,with significant facts that the aforementioned indexes in west slope are higher than that in the east and differences(P<0.05)are obvious;the total biomass is 443.24~626.14 g/m^(2),combined with the aboveground biomass,443.24~626.14 g/m^(2),and underground biomass,290.12~373.16 g/m^(2);the biomass in the east slope,mainly made up of Potentilla coriandrifolia and Polygonum macrophyllum cluster,is higher than that in the west,mainly composed of Polygonum viviparum and Kobresia macrantha cluster,alongside significant discrepancy(P<0.05).In the meanwhile,the biomass of dominant species in the east slope contributes more to the total biomass compared to that in the west.【Conclusion】The geographical elements in alpine meadow flora are complex with relatively similar characteristics in the temperate zone;the species distribution,in the west slope,is more balanced,and the species diversity is more abundant than that in the east slope.The results could provide the scientific foundation for the sustainable development of biomass in the Sygera Mountain’s alpine meadow area,and productivity in this area as well.
作者
孙凯歌
袁敏
屈兴乐
罗大庆
SUN Kaige;YUAN Min;QU Xingle;LUO Daqing(Institute of Tibet Plateau Ecology,Tibet Agricultural and Animal Husbandry University,Nyingchi,Tibet 86000,China;Key Laboratory of Forest Ecology in Tibet Plateau(Tibet Agricultural&Animal Husbandry University),Ministry of Education,Nyingchi,Tibet 860000,China;National Forest Ecosystem Observation﹠Research Station of Nyingchi Tibet,Nyingchi,Tibet 860000)
出处
《四川农业大学学报》
CSCD
北大核心
2022年第1期90-99,共10页
Journal of Sichuan Agricultural University
基金
西藏高原森林生态教育部重点实验室研究生创新计划项目(XZA-JYBSYS-2021-Y14)
西藏农牧学院研究生创新计划项目(YJS2019-16)。
