内蒙古7种针茅属植物生态位研究  

Study on Niches of 7 Stipa species in Inner Mongolia

作　　者：胡雪峰 张峰 张彬[1,2] 史世斌 杨阳[1,2] 乔荠瑢 赵天启 赵萌莉[1,2] HU Xue-feng;ZHANG Feng;ZHANG Bin;SHI Shi-bin;YANG Yang;QIAO Ji-rong;ZHAO Tian-qi;ZHAO Meng-li(College of Grassland, Resource and Environment, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010019, China;Key Laboratory of Grassland Resources, Ministry of Education of China, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010019, China;Water Resources Research Institute of Inner Mongolia,Hohhot, Inner Mongolia 010019, China)

机构地区：[1]内蒙古农业大学草原与资源环境学院,内蒙古呼和浩特010019 [2]内蒙古农业大学草地资源教育部重点实验室,内蒙古呼和浩特010019 [3]内蒙古自治区水利科学研究院,内蒙古呼和浩特010051

出　　处：《草地学报》2021年第12期2778-2784,共7页Acta Agrestia Sinica

基　　金：国家自然科学基金项目(31861143001);内蒙古自治区自然科学基金项目(2020ZD03);内蒙古自治区科技计划项目(2019ZD008)资助;内蒙古自治区科技成果转化资金项目(2020CG0055)资助。

摘　　要：针茅属植物是内蒙古草原的主要优势种或建群种,具有重要的经济和生态价值。本研究以内蒙古地区7种针茅属植物为研究对象,分析其在群落中的相对重要值、生态位宽度及其在群落中的生态位重叠。结果表明:短花针茅(Stipa breviflora)、戈壁针茅(S.tianschanica)、小针茅(S.klemenzii)、沙生针茅(S.glareosa)和大针茅(S.grandis)在群落中的相对重要值大于30%,而克氏针茅(S.krylovii.)和贝加尔针茅(S.baicalensis)的相对重要值较小。生态位宽度分析发现:短花针茅、戈壁针茅、小针茅、沙生针茅和大针茅的生态位宽度较高,在群落中具有优势地位,且对生长环境适应能力较强。而克氏针茅和贝加尔针茅生态位宽度显著低于上述5种针茅属植物。贝加尔针茅、克氏针茅、沙生针茅及大针茅的平均生态位重叠指数较大;而戈壁针茅、短花针茅及小针茅的平均生态位重叠指数较小。Stipa species is a dominant or established species in Inner Mongolia grasslands and has important economic and ecological service functions.In this study,seven Stipa species in Inner Mongolia were studied to analyze their relative importance values,ecological niche breadth and ecological niche overlap effects in the community.The results showed that the relative importance values of S.breviflora,S.tianschanica,S.klemenzii,S.glareosa and S.grandis in the community were greater than 30%,and S.krylovii and S.baicalensis had relatively low importance values.S.breviflora,S.tianschanica,S.klemenzii,S.glareosa and S.grandis had high niche breadth and a dominant position in the community,and were more adaptable to the growing environment.In contrast,the ecotone widths of S.krylovii and S.baicalensis were significantly lower than those of the above five S.species.The average niche overlap indices of S.breviflora,S.tianschanica,S.klemenzii,S.glareosa and S.grandis were relatively greater,and S.breviflora,S.tianschanica and S.klemenzii were smaller.

关 键 词：针茅属植物 生态位宽度 生态位重叠 相对重要值 

分 类 号：S948.1[农业科学—水产养殖]