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Tous droits r€serv€s Revue des sciences de l'eau, 2002 This document is protected by copyright law. Use of the services of 'rudit (including reproduction) is subject to its terms and conditions, which can be viewed online. This article is disseminated and preserved by 'rudit. 'rudit is a non-profit inter-university consortium of the Universit€ de Montr€al, promote and disseminate research.

https://www.erudit.org/en/Document generated on 05/21/2023 11:25 p.m.Revue des sciences de l'eauJournal of Water Science

Bioc€nose p€lagique du lac oligom€sotrophe de Pom€ranie (Pologne) : €tude des communaut€s de la boucle mocrobienne

et du pytoplanctonPelagic biocenosis in the oligo-mesotrophic lake of Pomerania(Poland): study of communities of microbial loop andphytoplankton

E. Szelag-Wasielewska

Volume 15, Number 1, 2002URI: https://id.erudit.org/iderudit/705433arDOI: https://doi.org/10.7202/705433arSee table of contentsPublisher(s)Universit€ du Qu€bec - INRS-Eau, Terre et Environnement (INRS-ETE)ISSN0992-7158 (print)1718-8598 (digital)Explore this journalCite this article

Szelag-Wasielewska, E. (2002). Bioc€nose p€lagique du lac oligom€sotrophe de Pom€ranie (Pologne) : €tude des communaut€s de la boucle mocrobienne et du pytoplancton. Revue des sciences de l'eau / Journal of Water Science 15 (1),

27"35. https://doi.org/10.7202/705433ar

Article abstract

This study presents results of investigations on abundance and biomass of the main communities of the microbial loop (heterotrophic bacteria, autotrophic picoplankton, heterotrophic flagellates, ciliated protozoa) as well as nano- and microalgae in the large (525 ha) and deep (48 m) oligo-mesotrophic lake Bobifcigskie Wielkie located in West Pomerania, Poland. Samples were taken from the pelagial zone in 1996. Within organisms of picoplankton size the heterotrophic bacteria were the most abundant trophic group. Their biomass, together with the much lower abundant autotrophic picoplankton (3.5 to 5.4 ...g†C L -1 ), constituted 15% to 22% of the total microbial biomass. The sum of biomasses of heterotrophic flagellates and ciliated protozoa was similar at all depth (3.0-3.8 ...g†C†L -1 ), ranging between 8-24% of total biomass. Phytoplankton organisms larger than 2.0 ...m represented the biggest part of the total microbial biomass, i.e. from 50% to 78% (8.4-27.5 ...g†C†L -1 ). The microplankton constitutes the largest part of the phytoplanktonic biomass. Whereas the diatoms and cryptomonads were the most abundant in the upper layers of the lake. The filamentous cyanobacteria of the genus Planktothrix dominated in the deeper waters. REVUE DES SCIENCES DE L'EAU, Rev. Sci. Eau 15/1(2002) 27-35

Biocénos

e pélagiqu e d u la c oligomésotroph e d e

Pomerani

e (Pologne

étud

e de s communauté s d e l a boucl e microbienn e e t d u phytoplancto n

Pélagi

e biocenosi s i n th e oligo-mesotrophi c lak e o f

Pomerani

a (Poland) stud y o f communitie s o f microbia l loo p an d phytoplankto n E

SZELAG-WASIELEWSK

A

SUMMAR

Y Thi s stud y présent s result s o f investigation s o n abundanc e an d biomas s o f th e mai n communitie s o f th e microbia l loo p (heterotrophi c bacteria autotrophi c picoplankton heterotrophi c flagellâtes ciliate d protozoa a s wel l a s nano an d microalga e i n th e larg e (52 5 ha an d dee p (4 8 m oligo-mesotrophi c lak e

Bobiçcinski

e

Wielki

e locate d i n Wes t

Pomerania

Poland

Sample

s wer e take n fro m th e pelagia l zon e i n 1996
Withi n organism s o f picoplankto n siz e th e heterotrophi c bacteri a wer e th e mos t abundanquotesdbs_dbs4.pdfusesText_7

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