Department of Microbiology and Plant Physiology, University of Bergen, Jahnebakken. 5, 5007 Bergen, Norway.
Appl Environ Microbiol. 1990 May;56(5):1400-5. doi: 10.1128/aem.56.5.1400-1405.1990.
Population sizes of algae, bacteria, heterotrophic flagellates, and viruses were observed through the 1989 spring diatom bloom in Raunefjorden in western Norway. The culmination of the diatom bloom was followed by a peak in the concentration of bacteria and an increase in the concentration of heterotrophic flagellates, a pattern consistent with the concept of a food chain from photosynthetically produced organic material, through bacteria, to bacterivorous flagellates. The concentration of viruses varied through the spring bloom from 5 x 10 in the prebloom situation to a maximum of 1.3 x 10 viruses ml 1 week after the peak of the diatom bloom. Coinciding with the collapse in the diatom bloom, a succession of bacteria and viruses was observed in the mucous layer surrounding dead or senescent diatoms, with an estimated maximum of 23% of the total virus population attached to the diatoms. The dynamic behavior observed for the virus population rules out the possibility that it is dominated by inactive species, and the viruses are suggested to be active members of the microbial food web as agents causing lysis in parts of the bacterial population, diverting part of the bacterial production from the predatory food chain.
在挪威西部的劳恩芬杰（Raunefjorden），我们观察到了藻类、细菌、异养鞭毛虫和病毒的种群数量，这些都是 1989 年春季硅藻大量繁殖期间的情况。硅藻大量繁殖的高峰期过后，紧接着就是细菌浓度的峰值和异养鞭毛虫浓度的增加，这种模式符合从光合作用产生的有机物质到细菌，再到食细菌鞭毛虫的食物链概念。病毒的浓度在春季繁殖过程中从繁殖前的 5 x 10 变化到硅藻大量繁殖高峰期后一周的 1.3 x 10 病毒 ml-1。在硅藻大量繁殖崩溃的同时，我们在围绕着死亡或衰老硅藻的黏液层中观察到了细菌和病毒的连续繁殖，估计有 23%的总病毒种群附着在硅藻上。病毒种群的动态行为排除了其由不活跃物种主导的可能性，因此病毒被认为是微生物食物网中的活跃成员，作为导致部分细菌种群裂解的因子，从捕食食物链中转移了部分细菌产量。
