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本文描述了1983年9月—1984年12月4个航次南海中部(12°—19°30′N,111°—118°E)综合调查期间有关叶绿素a和光合作用的测定结果,并对叶绿素a时空分布,光合作用及其与环境因子的关系进行了讨论。调查表明:次表高值层为叶绿素分布的一个特征,其深度在50—100m左右,含量范围多在0.1—0.6mg/m~3之间。叶绿素a的垂直变化与温、盐跃层,营养盐以及光的分布有关,而垂直积分的总量平面分布则与不同水团的消长有关。光合作用随深度的变化说明某些浮游植物适于低光下生长,而这些生物的活动也影响着亚硝酸盐和溶解氧的生成。
This paper describes the results of chlorophyll a and photosynthesis measurements during the comprehensive survey of the central South China Sea (12 ° -19 ° 30’N, 111 ° -118 ° E) from September 1983 to December 1984 for 4 voyages. The chlorophyll a a spatial-temporal distribution, photosynthesis and its relationship with environmental factors were discussed. The investigation shows that the sub-table high-value layer is a characteristic of chlorophyll distribution, the depth is about 50-100m, and the content range is mostly 0.1-0.6mg / m ~ 3. The vertical variation of chlorophyll a was related to the distribution of temperature and salinity, nutrients and light, while the distribution of the total vertical distribution was related to the growth of different water masses. Changes in photosynthesis with depth indicate that some phytoplankton are suitable for low light growth, and the activities of these organisms also affect the formation of nitrite and dissolved oxygen.