长白山高山冻原植被生物量的分布规律

摘要/Abstract

摘要： 从物种生物量、优势种器官生物量和植被生物量角度,探讨了长白山高山冻原生态系统生物量的空间变化规律.结果表明, 在调查的43种长白山高山冻原植物中,单物种生物量排序前5种植物分别是牛皮杜鹃(Rhododendron chrysanthum)(159.01 kg·hm^-2)、笃斯越桔(Vaccinium jliginosum var.alpinum)(137.52 kg·hm^-2)、高山笃斯(Vaccinium uliginosum)(134.7 kg·hm^-2)、宽叶仙女木(Dryas octopetala var.asiatica)(131.5 kg·hm^-2)圆叶柳(Salix rotundifolia)(128.4 kg·hm^-2).它们是长白山高山冻原生态系统的优势种.地下与地上生物量和地下与总生物量之比随海拔升高逐渐增加.植被生物量随海拔升高,总体呈逐渐减小的趋势.植被生物量与海拔高度呈显著负相关.长白山高山冻原生态系统平均生物量为2.21 t·hm^-2,对调节长白山小气候、涵养水源、水土保持等生态服务功能的发挥有着重要的作用,同时对固定大气CO₂起着汇的作用.

关键词: 高山冻原, 生物量, 长白山

Abstract: Climate change is one of the hotspots in global environment concerns,while alpine tundra ecosystem is most sensitive to global climate change.Because of the relatively small area of tundra,researches on alpine tundra ecosystem were much less.Based on the measurement of species biomass,dominant species organ biomass and vegetation biomass,this paper discussed the biomass spatial variation in alpine tundra ecosystem of Changbai Mountains.The results showed that among 43 species investigated,the first five species in biomass were Rhododendron chrysanthum(159.01 kg穐m^-2),Vaccinium uliginosum var.alpinum(137.52 kg穐m^-2),Vaccinium uliginosum(134.7 kg穐m^-2),Dryas octopetala var.asiatica(131.5 kg穐m^-2) and Salix rotundifolia(128.4 kg穐m^-2),which were the dominant species in the alpine tundra ecosystem of Changbai Mountains.Along with increasing altitude,the ratio of below-/above-ground biomass and below-ground/total biomass gradually increased,while the vegetation biomass gradually decreased.The vegetation biomass showed a significant correlation with altitude in typical alpine tundra ecosystem of Changbai Mountains,and the average vegetation biomass was 2.21 t穐m^-2 .Alpine tundra ecosystem is very important for microclimate regulation,soil improvement,water-holding,soil conservation,nutrient cycling,carbon fixation and oxygen production,and currently,it is the CO₂ sink of Changbai Mountains.

Key words: Alpine tundra, Biomass, Changbai Mountains

中图分类号:

Q148

魏晶, 吴钢, 邓红兵. 长白山高山冻原植被生物量的分布规律[J]. 应用生态学报, 2004, (11): 1999-2004.

WEI Jing, WU Gang, DENG Hongbing. Vegetation biomass distribution characteristics of alpine tundra ecosystem in Changbai Mountains[J]. Chinese Journal of Applied Ecology, 2004, (11): 1999-2004.

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