中国南极长城湾1994年1～2月间海水初级生产初析

A RUDIMENTARY ANALYSIS ON PRIMARY PRODUCTION OF SEAWATER IN CHINESE GREAT WALL BAY,ANTARCTICA DURING JAN.～FEB1994

对中国南极长城湾内水体夏季的初级生产力于１９９４年１～２月间作了估计。发现其初级生产碳量约为０．７９９ｇｍ－３ｄ－１。２月份高于１月份。表层、中层和下层相比，下层的日产量仍高。意味着该湾水体处于真光层范围内。水柱上下均有相应的初级生产。水温提高似有利于初级生产。初级生产的粗生产量与叶绿素ａ（Ｃｈｌ－ａ）、ＮＨ４－Ｎ、总Ｎ、ΣＮ／Ｐ的变化较为一致。营养盐相当充足。而与ＮＯ２－Ｎ、ＰＯ４－Ｐ较不一致。与异养菌数也相悖。推测异养菌有较强的分解有机质能力和矿化作用活动。

Summer primary production of seawater in Chinese Great Wall Bay,Antarctic during Jan.～Feb.1994 was estimated.The results revealed that the yield of the carbon primary production was about 0799g·m-3·d-1in the waters.We found that the yield in the deeper water column was fairly high as compared to the yield in the upper and middle columns.It showed that the deeper water surveyed lies still in the range of the euphotic zoneThis meant that there was a quite high primary production in the waters.The yield of the gross production was rather consistent with the variates, such as. chlorophyll a,NH4N,NO3N,ΣN and ΣN/p. This seemed to indicate that there were sufficient nutrient salts there,which,however ,was not consistent with the concentrations of NO2N,PO4P.This was not in coordination with the abundance of heterotrophic bacteria and suggests that these bacteria had a capability of degrading organic materials as well as strong mineralization.