雷州半岛红树林空间结构研究

Analysis of the Stand Spatial Structure of Mangrove Forest in Leizhou Peninsula

利用角尺度、混交度和大小比数3个林分空间结构参数,分析了雷州半岛红树林的空间结构.结果表明:样地1、2、3、4的混交度为0.66、0.62、0.52、0.41,样地4介于弱度混交到中度混交之间,其他样地介于中度混交和强度混交之间;在空间大小对比上,白骨壤Avicennia marina的直径大小比数在4块样地中都较小,生长占有较大的优势,红海榄Rhizophora stylosa在各样地中都处于劣势和绝对劣势状态,其他树种平均大小比数都在0.5左右,生长上处于中庸状态;样地1、2、3、4的林分平均角尺度分别为0.61、0.43、0.45、0.63,样地1、4的林木分布格局为团状分布,样地2、3为均匀分布.

Stand spatial structure of mangrove forest in Leizhou Peninsula was investigated using three structure parameters （uniform angle index,mingling,and neighborhood comparison）. The results showed that the average mingling in four plots were 0. 66,0. 62,0. 52,0. 41 respectively ,plot 4 was between low mixture and moderate mixture, the others were between moderate mixture and strong mixture; Avicennia marina were＇dominant at DBH neighborhood comparison, Rhizophora stylosa is suppressed, the others were intermediate; the uniform angle index of the four plots were 0.61,0, 43,0. 45,0. 63, respectively, which showed that the distribution of trees in plot 2 and 3 kept the uniform pattern,plot 1 and 4 were clumped distribution.