ARE BACTERIA ACTIVE IN THE COLD PELAGIC ECOSYSTEM OF THE BARENTS SEA

被引：38

作者：

THINGSTAD, TF

MARTINUSSEN, I

机构：

[1] Department of Microbiology, University of Bergen, Bergen, N-5007

来源：

POLAR RESEARCH | 1991年 / 10卷 / 01期

关键词：

D O I：

10.1111/j.1751-8369.1991.tb00651.x

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Bacterial biomass and activity indicators have been studied at low water temperatures (- 1.9 to +4-degrees-C) in the Barents Sea. Strong responses by indicators of bacterial activity, such as hydrolytic enzyme and substrate uptake potentials, were observed in association with the development of phytoplankton blooms. At late successional stages of blooms, observation by epifluorescence microscopy revealed heavy bacterial colonisation of detrital matter, in particular of senescent colonics of Phaeocystis pouchetii. Based on the retention of bacteria on filters of 1-mu-m porc size, up to 55% of the bacterial population was estimated to be attached to organic aggregates in some cases. Based on thymidine incorporation and a conventional conversion factor, bacterial generation times as short as one day were estimated at temperatures below zero. Changes in substrate availability governed by thc successional stages of thc planktonic ecosystem seem to be more important as controlling factors for bacterial growth than the low temperatures of the Barents Sea.

引用

页码：255 / 266

页数：12

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