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The present study is based on the materials collected from the middle waters of the South China Sea between 12°-15°N and 111°-118°E during May to July in 1978.The biomass of the phytoplankton (Y, dependent variable) is established to give the biomass of each Species and the environmental factors (i. e. water temperature, salinity, oxygen, silicate and phosphate contents), X1,X2...,X139tt are independent variables that are used to stepwisc regression analysis. Accordicg to the mathematical tests and the practical experience by which a lot of species are deleted and added to the equation, the authors consider that the 4th equation as shown below is optimal one for the model of the biomass on the phytoplankton from this waters.The optimal equation refers to text. 相似文献
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囊甲藻属是广泛分布在热带和亚热带海洋的一类发光甲藻。早在1872-1876年“挑战者号”航海调查(“Challenger”Expedition)中,Murray即建立了囊甲藻属,并注意到这些囊甲藻个体能产生明显的燐光,其后的调查也多次证明本属中的大部分种类都明显发光。截至目前,在世界上已记录囊甲藻12种、2变种和1变型(包括生活史还未完全了解的种类)的形态和分布。近十年来,对本属种类的亚显微构造、生活史和分类地位等也陆续作过一些研究,但仍有不少问题需要澄清。
本文是根据1974年5-6月和1975年3-4月在我国西沙群岛、中沙群岛及其附近海域,以网目边长为64微米的浮游植物网所采得的资料进行研究的,共报告囊甲藻属5种、1变种和1变型。截至目前,国内对本属尚无报道,本文中论及的种类都是我国的首次记录。 相似文献
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