不同潮带红海榄群落胎生繁殖体空间分布格局分析

Spatial distribution patterns of Rhizophora stylosa community viviparous reproduction in different tide zones

在广东省湛江市高桥不同潮带不同红海榄群落展开胎生繁殖体空间分布格局调查。分析比较胎生繁殖体在的上、中、下等不同冠层,东、南、西、北等不同方位,以及面潮、背潮两部分等的8种聚集度指标(I、C、M*、CA…).结果表明,高桥内带红海榄胎生繁殖体主要分布在上层冠层、东方位和背潮部分;中带红海榄胎生繁殖体主要分布在中层冠层,在各个方位以及面潮和背潮两部分的分布无显著性区别;红海榄胎生繁殖体的空间分布格局皆为聚集分布。结合研究结果,提出在造林困难的潮带可进行红海榄胎生繁殖体的合理密集种植,提高胎生繁殖体的环境抵御能力,从而提高存活率。

The investigations of the spatial distribution patterns of Rhizophora stylosa viviparous propagnle in Gaoqiao of Zhanjiang, Guangdong province were conducted. The 8 aggregation degree indicators （I, C, M＊, CA…） were compared and analyzed of viviparous reproductions located at upper, middle and lower canopy, in east, south, west and north azimuth, faceto tide and back tide. The results indicate that R. stylosa viviparous reproduction of inner tide in Gaoqiao mainly distributed in upper crown, east position and back tide; and the viviparous reproduction of middle tide mainly distributed in middle crown, had little significance difference distribution of each position and face-back tide; the distribution belonged generally to the aggregated distribution pattern. Finally, it is proposed that the R. stylosa viviparous reproduction should be planted with reasonable density in the difficult tide zones for afforestation, thus increasing resistance ability form environment and enhancing the survival percentage.