草业学报2025，Vol.34Issue(6)：14-26,13.DOI:10.11686/cyxb2024286
祁连山国家公园高寒草地功能群多样性与生产力研究
A study of functional group diversity and productivity of alpine grassland in Qilian Mountain National Park
摘要
Abstract
Species diversity plays a vital role in maintaining ecosystem function of grasslands and the role of the Qilian Mountains as an ecological barrier.However,our understanding about the relationship between species diversity and ecosystem productivity and the mechanisms involved in maintaining that balance remain limited in this region.Using aerial photography by a lightweight unmanned aerial vehicle and field sampling at seven typical alpine grassland sites in Qilian Mountain National Park in mid-to-late July 2023,we first analyzed the plant community composition of the seven alpine grassland sites,then evaluated the species richness and above-ground biomass of plant functional groups,and finally quantified the influence and mechanism of action of functional group species diversity on productivity.Results show that:1)The vegetation height in alpine desert was significantly higher than in other grassland types.However,mountain meadow had the highest vegetation cover,species richness and aboveground biomass,with mean values of 91.73%,16 species and 179.19 g·m-2,respectively.The plant density of alpine swamp meadow was the highest,being up to 4111 plants·m-2.2)Forbs were found to be the main functional groups in most types of alpine grassland.In mountain meadows,the species richness of forbs was 8,which accounted for about 50%of the total species richness.The sedges contributed more than 90%of the total aboveground biomass in alpine swamp meadow,nevertheless,the sedges gradually decreased and the grasses increased in series represented by alpine meadow,alpine meadow steppe and alpine steppe grasslands.There were only 2-3 functional groups in alpine desert and alpine desert grassland,resulting in few species.Productivity was also low.3)Species richness of community and functional groups positively correlated with aboveground biomass,indicating that maintaining plant functional group species diversity was conducive to improving ecosystem productivity.关键词
高寒草地/功能群/物种多样性/生物量Key words
alpine grassland/functional group/species diversity/biomass引用本文复制引用
罗顺华,刘新宇,孟宝平,陈璇黎,胡仁杰,于红妍,王贤颖,张勃,秦彧..祁连山国家公园高寒草地功能群多样性与生产力研究[J].草业学报,2025,34(6):14-26,13.基金项目
国家自然科学基金项目(42071139),甘肃省杰出青年基金(21JR7RA066),中国科学院西部之光"西部青年学者"项目(xbzglzb2022022),甘肃省科技创新人才计划-西部之光"西部青年学者"项目(23JR6KA009),甘肃省科技计划项目(22JR5RA367)和南通市科技计划(JC12022061)资助. （42071139）
