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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Dynamics of autotrophic picoplankton and heterotrophic bacteria in the East China Sea
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Dynamics of autotrophic picoplankton and heterotrophic bacteria in the East China Sea

机译：东海自养微藻和异养细菌的动态

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摘要

Dynamics of Synechococcus, Prochlorococcus, picoeukaryotes and heterotrophic bacteria in the East China Sea, a marginal sea of the Northwest Pacific, were investigated by flow cytometry in winter 1997 and summer 1998. Temporally, Prochlorococcus were always more abundant in the summer than in the winter, the same was true to Synechococcus except for the oceanic region. In contrast, picoeukaryotes were more abundant in the winter than in the summer. Heterotrophic bacteria were the least variable component among the four groups of picoplankton. Spatially, Prochlorococcus were extremely variable in the sea. They were largely confined to the warm water current areas and absent in the coastal areas in the winter, but present at most locations in the shelf water in the summer. Synechococcus were more abundant in the coastal areas than in the open waters in the summer but inverse in the winter. Compared with other picoplankters, picoeukaryotes showed more responses to water fronts on the shelf. In surface water, the lower boundary temperature for Prochlorococcus to present was around 15.6 degrees C in the winter but 26.4 degrees C in the summer. while it could also be found in the stratified deep water where temperature was as low as 14.3 degrees C in the summer. The higher boundary concentrations of total inorganic nitrogen for Prochlorococcus were about 6.5 mu mol L-1 in the winter and about 3.0 mu mol L-1 in the summer in the surface layer. The lower boundary salinities for Prochlorococcus were 33.5 psu in the winter and 29.1 psu in the summer. The key limiting factor for the coastward distribution of Prochlorococcus in the East China Sea were considered to be the movements of the Kuroshio Current and the Taiwan Warm Water Currents year around, temperature in winter and freshwater input in summer. Synechococcus correlated to temperature positively and nitrogen negatively in the winter when the high phycourobilin (PUB) to phycoerythrobilin (PEB) ratio strain dominated, and were independent from temperature but were associated with nutrients in the summer when the low PUB to PEB ratio strain dominated. Heterotrophic bacteria were not significantly affected by temperature but showed associations with nutrients in the Summer, The big seasonal difference in the abundance of picoeukaryotes was most likely due to species succession. (c) 2005 Elsevier Ltd. All rights reserved.
机译：通过流式细胞术对东太平洋（西北太平洋边缘海）东海中的球菌，原球菌，微核生物和异养细菌的动态进行了流式细胞术的调查，分别于1997年冬季和1998年夏季进行。从时间上看，夏季的Prochlorococcus总是比冬季的丰富。 ，对Synechococcus而言，除了大洋地区以外，都是如此。相比之下，冬季的微核生物比夏季的丰富。异养细菌是四类浮游生物中变化最小的成分。在空间上，Prochlorococcus在海洋中变化很大。它们主要局限于温暖的水流区域，而冬季则不在沿海地区，但在夏季多数出现在架子水上。沿海地区的球菌较夏季的开放水域丰富，而冬季则相反。与其他微型浮游生物相比，微型古核生物对架子上的水前沿表现出更多的反应。在地表水中，Prochlorococcus存在的下边界温度在冬季约为15.6摄氏度，而在夏季为26.4摄氏度。夏季在低至14.3摄氏度的分层深水中也可以找到它。在表面层中，原球菌的总无机氮的较高边界浓度在冬季为约6.5μmolL-1，在夏季为约3.0μmolL-1。原球菌的下限盐度在冬季为33.5 psu，在夏季为29.1 psu。东海原球菌在沿海分布的主要限制因素被认为是黑潮和台湾一年来的暖水运动，冬季温度和夏季淡水输入量的变化。当高藻尿素（PUB）与藻红蛋白（PEB）比高的菌株占主导地位时，冬季，球菌与温度呈正相关，与负氮呈负相关，与温度无关，但在夏季，当低PUB与PEB比低的菌株占主导地位时，球菌与温度相关。异养细菌不受温度的显着影响，但在夏季显示与养分相关。异核生物丰富度的较大季节性差异最有可能是由于物种演替所致。 （c）2005 Elsevier Ltd.保留所有权利。

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