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当前位置: 首页 > 文章 > 岷江上游干旱河谷荒坡植物种群生态位研究 林业资源管理 2012 (6) 83-88+93
Position: Home > Articles > The Niche of the Plant Community of the Barren Hillsides in the Arid Valley of the Upper Reach of the Minjiang River Forest Resources Management 2012 (6) 83-88+93

岷江上游干旱河谷荒坡植物种群生态位研究

作  者：
杨子松;权秋梅
单  位：
西华师范大学生命科学学院;阿坝师范高等专科学校
关键词：
生态位;植物种群;干旱河谷荒坡;岷江上游
摘  要：
对岷江上游干旱河谷荒坡20个植物种群生态位进行了测定。结果表明:1)岷江上游干旱河谷主要植物种群生态位的测定以采用Simpson指数和重要值为宜,而生态位重叠则宜应用Pianka生态位重叠指数和综合优势比。2)垫状卷柏生态位宽度最大,它与高山韭、披针苔草、多茎景天、细柄草5个种群形成了共优群落。生态位宽度值分别为32.34,25.89,29.30,22.92和25.77。3)植物种群间有着较为普遍的生态位重叠但整体而言重叠值又比较小。植物生态位发生分离的程度还不够高,群落各种群间在竞争、互惠等种间相互作用上还没有达到较好的协调。
译  名：
The Niche of the Plant Community of the Barren Hillsides in the Arid Valley of the Upper Reach of the Minjiang River
作  者：
YANG Zisong1,QUAN Qinmei2(1.Aba Teachers College,Wenchuan 623002,China;2.The School of Life Sciences of CWNU,Nanchong 637002,Sichuan,China)
关键词：
niche,plant population,barren hillsides of arid valley,the upper reach of Minjiang River
摘  要：
Some work about the measurements of the niche breadths and niche overlaps of the plant population of the barren hillsides was carried out in the arid valley of the upper reach of the Minjiang River.The results are as follows.(1)The Simpson index and the important values are more suitable for measuring the niche breadths and the Pianka niche overlap index and the summed dominance ratios are more suitable for measuring the niche overlaps.(2)The community is co-dominated by Selaginella pulvinata,Allium sikkimense,Carex lanceolat,Sedum multicaule and Capillipedium parviflorum.Their niche breadth values were 32.34,25.89,29.30,22.92 and 25.77.(3)Niche overlap exist in most species pairs of the plant community of the barren hillsides of arid valley in the upper reach of Minjiang River.But many values of the niche breadth are very small.It indicated lower niche differentiation without enough level of interspecific association such as competition,reciprocity etc.

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