QUANTITATIVE RELATIONSHIPS BETWEEN PHYTOPLANKTON, BACTERIA AND HETEROTROPHIC MICROFLAGELLATES IN SHELF WATERS
QUANTITATIVE RELATIONSHIPS BETWEEN PHYTOPLANKTON, BACTERIA AND HETEROTROPHIC MICROFLAGELLATES IN SHELF WATERS
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DOI：
10.3354/meps012077
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发表时间：
1983-01-01
影响因子：
2.5
通讯作者：
LUCAS, MI
中科院分区：
文献类型：
--
作者：
LINLEY, EAS;NEWELL, RC;LUCAS, MI
对英吉利海峡西部近岸和上升流水域以及南非开普半岛南部本格拉上升流地区的细菌数量和生物量作为深度函数的估计表明，细菌数量与叶绿素a浓度评估的浮游植物存量相关。异养微鞭毛虫存量3-10亩。m，平均约为16.9%的细菌存量（mg C m-3），通过直接显微镜估计。通过微异养消费群落的C流计算表明。初级产量的20-60%，可能代表浮游动物在放牧过程中从浮游植物细胞中浸出和损失的溶解成分，进入微生物食物链。其中大部分似乎被细菌耗散，约有5.2-8.1%的光同化C被纳入细菌的C生产中。其中至少66%被异养微鞭毛虫利用，剩下最多34%的细菌产量留给较大的双食性悬浮饲料。
Estimates of the numbers and biomass of bacteria as a function of depth in coastal and upwelling waters off the western approaches to the English Channel and in the southern Benguela upwelling region off the Cape Peninsula, South Africa, show that the numbers of bacteria are correlated with the standing stocks of phytoplankton as assessed by chlorophyll a concentration. Standing stocks of heterotrophic microflagellates in the size range 3-10 .mu.m, amount to some 16.9% on average, of bacterial standing stocks (mg C m-3) estimated by direct microscopy. Calculations of C flow through the microheterotrophic consumer community suggest that .apprx. 20-60% of primary production, possibly representing the dissolved components leaching out of, and lost from phytoplankton cells during zooplankton grazing, enters the microbial food chain. Much of this appears to be dissipated by bacteria, with some 5.2-8.1% of the photoassimilated C being incorporated into bacterial C-production. At least 66% of this is exploited by the heterotrophic microflagellates leaving a maximum of 34% of bacterial production for the larger bactivorous suspension feeders.