An ordination of the upland forest communities of southern Wisconsin
An ordination of the upland forest communities of southern Wisconsin
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DOI：
10.2307/1942268
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发表时间：
1957-01-01
期刊：
影响因子：
6.1
通讯作者：
CURTIS, J. T.
中科院分区：
文献类型：
--
作者：
BRAY, J. ROGER;CURTIS, J. T.
应用一种新的排序方法，对威斯康星州南部59个高地阔叶林林分进行了研究。该方法认为，林分间的相似程度（以群落价值系数表示）可以转化为一个空间格局，其空间格局中群落价值系数的倒数与线性距离相等。利用圆弧投影和相交的几何方法，构造了3个植被梯度。这些梯度被用作独立的轴，以给出59个支架的三维取向。结果发现，在3个维度的物种形成的大气分布与高值在一个有限的部分的阵列，包围在所有方向上的下降值。每一种分布在不同程度上与其他物种的分布相交错，呈连续变化的模式。利用3个梯度对环境因子进行了相关分析，初步描述了植被与环境的相互作用模式。|| 摘要评论：J.R. Bray
Fifty-nine stands of upland hardwood forest in southern Wisconsin were studied by means of a new ordination technique, which considered the degree of similarity of 2 stands as shown by their coefficient of community value could be translated into a spatial pattern in which the inverse of the coefficient was equated with linear distance. By means of a geometric method of arc projection and intersection, 3 vegetational gradients were constructed. These gradients were used as independent axes to give a 3 dimensional orientation of the 59 stands. It was found that species in 3 dimensions formed atmospheric distributions with high values in a restricted portion of the array, surrounded by decreasing values in all directions. Each distribution was interspersed to varying degree with that of other species, in a continuously changing pattern. Correlation of environmental factors was made with the 3 gradients, and some interaction patterns between vegetation and environment were initially described. || ABSTRACT AUTHORS: J. R. Bray