广西英罗港红树林区鱼类多样性研究

1999年4个季度研究了广西英罗港红树林区的林缘和潮沟潮水中鱼类的种类多样性。共发现有鱼类76种，隶属于36科59属。其中林缘有42种，潮沟有54种，4个季度出现的鱼类种数潮沟多于林缘。两生境种类相似性指数较低，表现为：春季＞冬季＞夏季＞秋季。各季节均出现的鱼类在林缘有6种，占全年总种数的14．3％；潮沟有8种，占全年总种数的14．8％；两个季节间共有种最多的：在林缘是夏季与冬季，在潮沟是夏季与秋季，它们的相似性指数也最大。全年在林缘和潮沟均出现的鱼类仅有1种。本区鱼类以暖水性种占绝对优势；但潮沟暖温性种多于林缘。在生态类型上，林缘以中上层种类较多，潮沟则以底层种类较多。

STUDY ON SPECIES DIVERSITY OF FISHES IN MANGROVE AREA OF YINGLUO BAY, GUANGXI PROVINCE

This paper deals with the species diversity of the fishes living in the forest-fringed and tidal creek waters of mangrove area at the Yingluo Bay, Guangxi Province. 76 species of fishes, belonging to 36 families and 59 genera, were found in the four seasons of 1999. Among of them, 42 species were found in the forest fringed waters, and 54 species in the tidal creek waters. Usually the species found in the tidal creek waters were more than those in the forest fringed waters. The indexes of species similarity between the two habitats were low, in the order of spring, winter, summer and autumn from high to low. 6 species, 14.3% of the total, were found in the forest fringed waters through the whole year, and 8 species, 14.8% of the total in the tidal creek waters. In the forest fringed waters, the most were the species common to summer and winter, and in the tidal creek waters, those common to summer and autumn. Correspondingly they had the largest similarity indexes. Only one species was found in both habitats through the whole year. The warm water species were dominant in both habitats. The warm temperate species in the tidal creek waters were more than those in the forest fringed waters. The middle or surface layer species were dominant in the forest-fringed waters, and the bottom species in the tidal creek waters.