生物与环境的统一,表现为生物与周围环境的相互关系。生物之间呈现食物链,互相制约与依存;生物与无机环境的关系,亦相当密切的。浮游植物是海域的初级生产者,在生物食物链中占特别重要的地位。自养生物与无机环境的关系,比异养生物更为复杂;无机环境有的为其生长条件,有的则是营养物质。作者曾用统计学方法,讨论过渤海个别年份自养生物与无机环境的关系。结果指出,该水域的盐度、硅酸盐及酸碱度,是浮游植物较好的环境因子;水温及磷酸盐是其主要控制及影响要素。无机环境决定着海洋初级生产力, The unity of biology and environment, manifested as the relationship between living creatures and the surrounding environment. Biological food chain between the show, mutual restraint and dependence; biological and inorganic environment, is also very close. Phytoplankton is a primary producer of marine waters and occupies a particularly important position in the biological food chain. The relationship between autotrophs and the inorganic environment is more complicated than heterotrophs; some are in the inorganic environment for their growth conditions, while others are nutrients. The authors used statistical methods to discuss the relationship between autotrophs and the inorganic environment in individual years in the Bohai Sea. The results show that the salinity, silicate and pH of the waters are good environmental factors for phytoplankton; water temperature and phosphate are the main control and influencing factors. Inorganic environment determines the marine primary productivity,