摘要
Standing stocks and production rates of phytoplankton and abundance of bacteria were investigated at 39 stations in the Seto Inland Sea, Japan during four crulses in October 1993, January, April and June 1994. Primary productivity was measured by the13C tracer method. Photosynthetic rate varied from 0.41 to 32.1 μgC/1/h with an average value of 4.67 μgC/l/h. Annual primary production was estimated to be 218 gC/m2/year. Annual primary production in this study was 1.8 times as high as the values which were previously reported at same area. The reason for the disagreement between our primary production value and previous values is not thought to be due to the difference of methods used for measuring primary production or the different Chl.a concentrations but to the method of estimating the primary production in the euphotic zone from thein vitro measurements. The distribution of bacterial cells in surface seawater was examined during the same cruises. Bacterial cell density ranged from 0.32 to 3.4×106 cells/ml. The density was relatively high in the eutrophic regions of Hiroshima Bay and Osaka Bay In addition, a high density of bacteria was also observed in an area within Suo Nada where Chl.a was relatively low. The disparity between Chla and bacterial density in Suo Nada suggests that bacterial abundance can be controlled by the availability of substrates other than phytoplankton exudate. KeywordsPrimary production Seto Inland Sea 13C tracer method bacteria
摘要译文
站在股市和浮游植物和细菌大量生产率在39站中的濑户内海，日本在4 crulses于1993年10月的调查，一月，四月和六月1994Primary生产力是由测量SUP从0℃至32粜C / 1 /小时4渭GC /升的平均变化值13 / SUPç示踪剂methodPhotosynthetic率/ ^ h全年初级生产估计为218 GC / M SUP 2 / SUP / yearAnnual在本研究的主要产量1imes高达原先以同一地区报告的值他的理由我们的首要产值和以前值之间的分歧不被认为是由于用于测量初级生产或不同叶绿素的方法的区别一个浓度而是从登体外测量估算透光层的主要生产方法同一cruisesBacterial细胞密度过程中进行了检查在表面海水细菌细胞的分布范围从0℃至310 SUP 6 / SUP细胞/ ml密度为在广岛湾，大阪湾的富营养化地区另外比较高，细菌密度高的区域也观察琐纳达哪里叶绿素内一个相对较低在索纳达叶绿素a和细菌密度之间的差异表明，大量的细菌可以通过浮游植物比其他渗出基板的供应来控制KeywordsPrimary生产濑户内海SUP 13 / SUPç示踪法细菌
Kuninao Tada [1] Koji Monaka [1] Masakazu Morishita [1] Toshiya Hashimoto [2]. Standing stocks and production rates of phytoplankton and abundance of bacteria in the Seto Inland Sea, Japan[J]. Journal of Oceanography, 1998,54(4): 285-295