海南岛清澜港红树树种适应生境能力与水平分布*

红树植物的器官形态变异反映了它们对于不同潮间带生境的适应能力，灰色聚类分析结果表明杯萼海桑、海桑、正红树属于适应潮间带生境能力强的种类，木榄、海莲属于适应潮间带生境弱的种类。适应能力强者在低、中潮滩组建群落，适应能力低者在高、中潮滩组建群落。随潮间带淤积升高，适应能力强者不断向外占领裸滩，适应能力弱者不断侵入适应能力强者的迹地。

Mangrove Plants'Adaptive Ability to Habitat and Their Horizontal Distribution in Qinglan Harbour ,Hainan Island

Mangrove plants' organic variations in morphology reflect their differentadaptive ability to intertidal zones. The resuit from grey clustering analysis shows that Son-neratia alba, S. caseolaris and Rhizophora apiculata belong to the species with strong adap-tive ability ,Bruguiera gymnorhiza and B. sexangula belong to the species with weak adap-tive ability. The former ones form their communities in the low and lower-middle tideland;and the latter ones,on the contrary,in the high and higher-middle tideland.With the inter-tidal zone silting and upgrading,the species with strong adaptive ability unceasingly occupyoutward bare beach,those with weak adaptive ability at the same time constantly intrude intothe slash of the species with strong adaptive ability.