高原鼢鼠鼠丘不同演替阶段植物功能群的特征及其影响因素  

Plant functional group characteristics in different successional stages of plateau zokor mounds and influencing factors

作　　者：张静[1] 叶国辉 孙文倩 董隆明 张志莹 花立民[1] Zhang Jing;Ye Guohui;Sun Wenqian;Dong Longming;Zhang Zhiying;Hua Limin(Engineering and Technology Research Center for Alpine Rodent Pest Control,National Forestry and Grassland Administration,Key Laboratory of Grassland Ecosystem,Ministry of Education,Prataculture College,Gansu Agricultural University,Lanzhou 730070,Gansu Province,China)

机构地区：[1]甘肃农业大学草业学院,草业生态系统教育部重点实验室,国家林业草原高寒草地鼠害防控工程技术研究中心,兰州730070

出　　处：《植物保护学报》2024年第5期1078-1089,共12页Journal of Plant Protection

基　　金：国家自然科学基金(32160338);甘肃省教育厅产业支撑计划项目(2021CYZC-05)。

摘　　要：为明确高寒草甸高原鼢鼠Eospalax baileyi鼠丘不同演替阶段植物功能群的特征及其影响因素,选取不同年限鼠丘及无鼠丘草地对植物的繁殖方式、生活型和根系类型进行调查,采用冗余分析法探究鼠丘植物功能群(繁殖功能群、生活型功能群和根系功能群)物种数、多度和地上生物量特征及其与土壤环境因子的关系。结果表明:无鼠丘草地植物繁殖方式以种子繁殖兼具无性繁殖的功能群占优势,其多度相对百分比为58.4%,地上生物量相对百分比为64.8%,鼠丘上植物以种子繁殖功能群为主,在3年生鼠丘上占比最高,多度相对百分比和地上生物量相对百分比分别为76.4%和75.5%;无鼠丘草地植物的生活型以地面芽和地下芽功能群为主,其多度相对百分比分别是52.4%和39.8%,地上生物量相对百分比分别是47.3%和48.5%,而鼠丘上植物中地面芽功能群减少,地上芽功能群增多,2年生鼠丘上植物以地下芽功能群占优势,其多度相对百分比和地上生物量相对百分比分别为68.0%和73.6%;无鼠丘草地植物以根茎型和须根型功能群为主,其多度相对百分比达到57.7%和28.0%,地上生物量相对百分比达到56.9%和25.7%,1年生和2年生鼠丘上植物以轴根型和根茎型功能群为主,3年生鼠丘上植物以块根型、轴根型、须根型和根茎型功能群为主,3年以上鼠丘上植物以块根型、须根型和根茎型功能群为主。冗余分析结果表明高原鼢鼠干扰主要通过改变土壤水分、土壤氮磷养分等资源条件来影响鼠丘植物功能群特征。To clarify the characteristics of plant functional groups and the influencing factors at differ-ent successional stages of plateau zokor mounds in alpine meadows,a survey of plant reproductive modes,life forms,and root types in mounds of different ages and adjacent non-mounded grassland was conducted.The redundancy analysis was employed to explore the relationship among the species rich-ness,abundance,and biomass characteristics of plant functional groups(reproductive functional groups,life form functional groups,and root functional groups)and soil environmental factors.The results indi-cated that the plants in non-mounded grassland were predominantly reproducing via seeds with some employing vegetative reproduction,with relative abundance percentage of 58.4%and relative aboveg-round biomass percentage of 64.8%.In contrast,plants on zokor mounds primarily relied on seed repro-duction functional groups,with the highest proportions on three-year-old mounds,where their relative abundance and aboveground biomass percentages were 76.4%and 75.5%,respectively.Life forms in non-mounded grassland were mainly ground bud and underground bud functional groups,with relative abundance percentages of 52.4%and 39.8%and relative aboveground biomass percentages of 47.3%and 48.5%,respectively.Whereas plants on zokor mounds,the ground bud functional group decreased while the aboveground bud functional group increased.On two-year-old mounds,underground bud plants were dominant,with relative abundance and relative aboveground biomass percentages of 68.0%and 73.6%,respectively.Plant roots in non-mounded grassland were mainly rhizome and fibrous root type functional groups,with relative abundance percentages reaching 57.7%and 28.0%,and relative aboveground biomass percentages of 56.9%and 25.7%,respectively.On one-year and two-year-old zo-kor mounds,the dominant plants were primarily axial root and rhizome functional groups.For three-year-old mounds,the plants consist mainly of tuberous,axial root,fibrous root,and rhizome functional grou

关 键 词：高原鼢鼠 植物功能群 演替 繁殖方式 生活型 根系类型 

分 类 号：S812[农业科学—草业科学]