Fate of heterotrophic bacteria in Lake Tanganyika (East Africa)

Fate of heterotrophic bacteria in Lake Tanganyika (East Africa)

11 pages, 6 figures, 2 tables

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Bibliographic Details
Main Authors: Pirlot, Samuel, Unrein, Fernando, Descy, Jean-Pierre, Servais, Pierre
Format: artículo biblioteca
Language:English
Published: Blackwell Publishing 2007-12
Subjects:Bacteria, Bacterial mortality, Grazing, Protozoa, Microbial food web, Tanganyika,
Online Access:http://hdl.handle.net/10261/26692
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spelling dig-icm-es-10261-266922020-11-12T10:47:47Z Fate of heterotrophic bacteria in Lake Tanganyika (East Africa) Pirlot, Samuel Unrein, Fernando Descy, Jean-Pierre Servais, Pierre Bacteria Bacterial mortality Grazing Protozoa Microbial food web Tanganyika 11 pages, 6 figures, 2 tables Bacterial mortality was studied using two complementary methods between 2002 and 2004 in the two main basins (north and south) of Lake Tanganyika. The disappearance of radioactivity from the DNA of natural assemblages of bacteria previously labeled with tritiated thymidine was used to estimate the mortality due to grazing by predators (72%) and due to the cell lysis (28%). Measurements of ingestion rate of bacteria by protozoa using fluorescent micro-particles yielded protozoan grazing rates similar to those provided by the thymidine method, and showed that heterotrophic nano-flagellates were responsible for most of the grazing pressure on the bacterial community of the pelagic zone (92–99%). Bacterial cell lysis was the second process involved in bacterial mortality, ranking before ciliate grazing. Overall, bacterial mortality was balanced with bacterial production. With regard to the assessment of the trophic role of bacteria, it was estimated that c. 5–8% of the organic carbon taken up by bacteria was converted into protozoan biomass and was thus available for metazoans This study was supported by the FRIA (National Fund for Fundamental Research) through the PhD Scholarship to S. Pirlot, and by the Belgian Science Policy Office project CLIMLAKE Peer reviewed 2010-07-30T09:56:08Z 2010-07-30T09:56:08Z 2007-12 artículo http://purl.org/coar/resource_type/c_6501 FEMS Microbiology Ecology 62(3): 354-364 (2007) 0168-6496(Print) http://hdl.handle.net/10261/26692 10.1111/j.1574-6941.2007.00396.x en https://doi.org/10.1111/j.1574-6941.2007.00396.x none 5867 bytes application/pdf Blackwell Publishing
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Bacteria
Bacterial mortality
Grazing
Protozoa
Microbial food web
Tanganyika
Bacteria
Bacterial mortality
Grazing
Protozoa
Microbial food web
Tanganyika
spellingShingle Bacteria
Bacterial mortality
Grazing
Protozoa
Microbial food web
Tanganyika
Bacteria
Bacterial mortality
Grazing
Protozoa
Microbial food web
Tanganyika
Pirlot, Samuel
Unrein, Fernando
Descy, Jean-Pierre
Servais, Pierre
Fate of heterotrophic bacteria in Lake Tanganyika (East Africa)
description 11 pages, 6 figures, 2 tables
format artículo
topic_facet Bacteria
Bacterial mortality
Grazing
Protozoa
Microbial food web
Tanganyika
author Pirlot, Samuel
Unrein, Fernando
Descy, Jean-Pierre
Servais, Pierre
author_facet Pirlot, Samuel
Unrein, Fernando
Descy, Jean-Pierre
Servais, Pierre
author_sort Pirlot, Samuel
title Fate of heterotrophic bacteria in Lake Tanganyika (East Africa)
title_short Fate of heterotrophic bacteria in Lake Tanganyika (East Africa)
title_full Fate of heterotrophic bacteria in Lake Tanganyika (East Africa)
title_fullStr Fate of heterotrophic bacteria in Lake Tanganyika (East Africa)
title_full_unstemmed Fate of heterotrophic bacteria in Lake Tanganyika (East Africa)
title_sort fate of heterotrophic bacteria in lake tanganyika (east africa)
publisher Blackwell Publishing
publishDate 2007-12
url http://hdl.handle.net/10261/26692
work_keys_str_mv AT pirlotsamuel fateofheterotrophicbacteriainlaketanganyikaeastafrica
AT unreinfernando fateofheterotrophicbacteriainlaketanganyikaeastafrica
AT descyjeanpierre fateofheterotrophicbacteriainlaketanganyikaeastafrica
AT servaispierre fateofheterotrophicbacteriainlaketanganyikaeastafrica
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