石羊河尾闾青土湖荒漠植物群落种间关联及生态位研究  

Interspecific Association and Niche of Desert Plant Communities in Qingtu Lake,the Tail of Shiyang River

作　　者：耿东梅 赵鹏[2] 陈亚东 张裕年 段晓峰[2] GENG Dong-mei;ZHAO Peng;CHEN Ya-dong;ZHANG Yu-nian;DUAN Xiao-feng(Hydro-electric Investigation and Design Research Institute of Lanzhou,Lanzhou 730010,P.R.China;Gansu Desert Control Research Institute,State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating,Lanzhou 730070,P.R.China;Rural Drinking Water Safety Management Office of Gansu Province,Lanzhou 730010,P.R.China)

机构地区：[1]甘肃省水利水电勘测设计研究院有限责任公司,甘肃兰州730010 [2]甘肃省治沙研究所,甘肃省荒漠化与风沙灾害防治国家重点实验室,甘肃兰州730070 [3]甘肃省农村饮水安全管理办公室,甘肃兰州730010

出　　处：《水生态学杂志》2024年第2期121-131,共11页Journal of Hydroecology

基　　金：国家自然科学基金(42207109,32060371);第二批陇原青年英才项目“[2023] 11号”。

摘　　要：探究荒漠植物群落种间关系,为石羊河尾闾干涸湖泊植被恢复与重建提供理论支撑。2018年9月,在石羊河下游青土湖设置3条调查样带,共调查灌木样方27个,草本样方81个。采用方差比率法、χ^(2)检验、Pearson相关、Spearman秩相关、联结系数Ochiai和生态位量化方法,开展荒漠植物群落种间关联程度、生态位宽度及生态位重叠特征研究。结果表明:青土湖荒漠植物群落包括24种植物,其中灌木8种,多年生草本8种,一年生草本8种,草本植物占总物种数的66.67%。不同生活型荒漠植物中重要值最大的分别为白刺(Nitraria tangutorum)、芦苇(Phragmites australis)和猪毛菜(Salsola collina)。方差比率分析表明,青土湖荒漠植物群落种间总体上呈不显著负联结关系,群落处于波动演替状态。Ochiai系数0~0.3的种对占总对数的72.83%,种对间的相关性较弱。生态位宽度较大的灌木有白刺(21.728)、梭梭(Haloxylon ammodendron)(10.321)、黑果枸杞(Lycium ruthenicum)(5.711);多年生草本有芦苇(12.556)、黄花补血草(Limonium aureum)(4.874)、荒漠黄耆(Astragalus grubovii)(4.248);一年生草本有猪毛菜(9.340)、盐生草(Halogeton glomeratus)(7.822)、雾冰藜(Bassia dasyphylla)(6.237)。生态位重叠较大的种对有灰绿藜(Chenopodium glaucum)和碟果虫实(Corispermum patelliforme)(0.84)、沙蒿(Artemisia desertorum)和戈壁驼蹄瓣(Zygophyllum gobicum)(0.77)、黄花补血草和画眉草(Eragrostis pilosa)(0.77)、砂蓝刺头(Echinops gmelinii)和红砂(Reaumuria soongarica)(0.75)。群落物种生态位重叠均值为0.12,种间竞争较小。建议在石羊河下游青土湖人工植物群落构建过程中重视种间关系,选择种间竞争小的灌木和多年生草本植物作为生态恢复的植物种。Qingtu Lake,located in the Tail of Shiyang River,serves as the important ecological barri-er to block the connection of the Tengger Desert and the Badain Jaran Desert.In this study,we ex-plored the interspecific relationship of desert plant community in Qingtu Lake,focusing on the inter-species association degree,niche width and niche overlap characteristics.The study aimed to provide theoretical support for vegetation restoration and reconstruction of dry lakes in the tail of Shiyang River.The study was based on the field survey conducted in September 2018,and 3 sampling belt in-cluding 27 shrub sampling plots and 81 herb sampling plots were set during the investigation,and the species,individual number,coverage and hight of the vegetation as well as the altitude,the longitude and latitude of the sampling plots were recorded.The variance ratio method,χ^(2) test,Pearson correla-tion,Spearman rank correlation,Ochiai association coefficient and niche quantification methods were used to analyze the interspecific relationship of desert plant community.Results show that a total of 24 plant species were identified during the investigation,including 8 shrubs,8 perennial herbs and 8 annual herbs.Herbaceous plants accounted for 66.67%of the total species.The dominant species were Nitraria tangutorum,Phragmites australis,and Salsola collina according to their importance val-ues in different life style species.Analysis of the variance ratio shows that there was no significantly negative association between the species of the desert vegetation community in Qingtu Lake,and the community was in a state of fluctuating succession.The species pairs with Ochiai coefficients of 0-0.3 accounted for 72.83%of the total pairs,and the correlation between species pairs was weak.Plant species with higher niche width in the desert vegetation community included shrub Nitraria tangutorum(21.728),Haloxylon ammodendron(10.321)and Lycium ruthenicum(5.711);Perennial herbs Phragmites australis(12.556),Limonium aureum(4.874)and Astragalus grubovi

关 键 词：荒漠植物 种间关联 生态位 青土湖 

分 类 号：Q145[生物学—生态学]