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以广东湛江特呈岛不同红海榄群落为研究对象,运用混交度、健康指数、大小比指数、竞争指数、角度尺和空间密度指数分析和比较了特呈岛不同红海榄群落空间结构。结果表明:群落2是高度混交,群落1和群落3属于中度混交,群落4为纯林;群落4红海榄纯林的胸径大小比最小,群落1红海榄和白骨壤混交群落的树高大小比数最小;林分空间分布格局中,所有群落的平均角尺度都大于0.517,为团状分布;红海榄、木榄混交群落健康状况比纯林群落好;红海榄纯林竞争指数最小,处于优势;群落3的平均空间密度指数比其它群落小,生长情况较好。
In this paper, different communities of Rhododendron syrup from Zengjiang Island, Zhanjiang, Guangdong were studied. The spatial structure of different Rhizophora stylosa communities in Techeng Island was analyzed and compared with the indexes of mixed degree, health index, size ratio index, competition index, angle scale and spatial density index. The results showed that: Community 2 was highly mixed, Community 1 and Community 3 were moderately mixed, Community 4 was pure forest; Community 4 Rhizophora stylosa pure forest had the smallest diameter at breast height, community 1 Rhizophora and Avicennia marina tree height size In the forest spatial distribution pattern, the average angular size of all the communities was greater than 0.517, which was in a clumpy distribution. The health status of mixed communities of R. solani and M. varities was better than that of pure stands. The competition index of R. solanacearum pure forest was the smallest The average spatial density index of community 3 was smaller than that of other communities and the growth was better.