围栏封育对呼伦贝尔草甸草原群落种间联结的影响

发布时间：2018-10-26 07:56

【摘要】：为探究短期封育对呼伦贝尔草甸草原植物种间联结的影响,运用方差比率法、基于2×2列联表的χ2检验对呼伦贝尔草甸草原群落进行总体联结性和种对间联结性检验,同时利用Ochiai指数和共同出现百分率(PC)测定各种对间的联结程度。结果表明:围栏内植物群落总体呈不显著负联结,围栏外植物群落总体呈不显著正联结;χ2检验发现围栏内正联结与负联结比例低于围栏外,围栏内植物群落并未稳定;围栏内外植物群落Ochiai指数和共同出现百分率(PC)趋势一致;围栏内Ochiai指数和共同出现百分率(PC)最大值均出现在糙隐子草(Cleistogenes squarrosa)和羊草(Leymus chinensis),糙隐子草和硬质早熟禾(Poa sphondylodes),羊草和硬质早熟禾;围栏内优势种优势地位明显,优势种Ochiai指数和共同出现百分率(PC)均大于围栏外优势种。
[Abstract]:In order to investigate the effect of short-term fencing on the interspecies association in Hulunbeir meadow, the overall association and interspecies association of Hulunbeir meadow grassland community were tested by using variance ratio method and 蠂 2 test based on 2 脳 2 table. At the same time, Ochiai index and co-occurrence percentage (PC) were used to determine the degree of association between various pairs. The results showed that there was no significant negative association between the plant communities in the enclosure and that outside the fence, 蠂 2 test showed that the ratio of positive and negative association in the enclosure was lower than that outside the fence, and the plant community in the enclosure was not stable. The Ochiai index of plant community inside and outside the enclosure was the same as that of co-occurrence percentage (PC). The maximum values of Ochiai index and co-occurrence percentage (PC) were found in (Cleistogenes squarrosa), (Leymus chinensis), (Poa sphondylodes), and POA. The dominant species in the fence were dominant, and the Ochiai index and co-occurrence percentage (PC) of dominant species were higher than those of heterosis species outside the fence.
【作者单位】：黑龙江八一农垦大学动物科技学院;内蒙古辉河国家级自然保护区管理局;
【基金】：国家公益性行业(环保)科研专项“北方重要生态功能区生态限制与安全性技术评价研究”(201109025)
【分类号】：S812

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