贵州盘县风洞藻席蓝藻群落生态初探

A PRELIMINARY STUDY ON MICRO-COMMUNITY ECOLOGY OF KARST CYANOPHYTAIN MAT FROM FENGDONG CAVE, PANXIAN, GUIZHOU

本文通过对盘县风洞蓝藻的实地考察和实验室研究，首次揭示洞穴藻席中蓝藻群集已经达到群落层次，即蓝藻群落表现为对微域生态位的广泛占据和普遍适应，其分布不仅具有高等植物群落具有的地段性分布，还具有高等植物群落所不具有的非地段性分布，而且以后一种占优势。一至若干蓝藻群落总以不同程度的嵌合、叠置、埋入和融合的方式组成群嵌，群嵌可视为蓝藻群落分类的基本单位。蓝藻的群嵌结构与洞穴岩溶藻席显著的生物岩溶作用密切相关，这种“相关”的形成是历史上一定蓝藻组合与环境相互选择演变而成的，是进化生态学作用的结果。在生物岩溶研究过程中。

Through on-the-spot survey and laboratory research of Cyanophyta in Fengdong cave, Panxian, it is firstly revealed that Cyanophyta assemblage in cave mat aiready reaches to community level. Cyanophyte communities appear as micro-community which occupy widely and adapt themself to mico-niches. Cyanophyte communities are distribute not only in a section of an area but also in a nonsection of that. The latter isn't found on higher plant community's distribution, while is found widely on Cyanophyta community's distribution. One to several Cyanophyta communities constitute mosaic-group in ways of mosaic, laminate, embolus and fusion. Mosaic may be looked on as a basic-unit of classification of Cyanophyta communities. Mosaic structure is closely related to marked biokarst act of cave karst-mat, and this kind of “relation” formed in the evolution of a mutual selection happened between definite Cyanophyta asemblage and environment. In other words, this is a result of evolution ecology. It would be significant to do much research on Cyanophyta micro-community ecology in the study of biokarst.