Artigo

The trophic role of microbial loop in an amazonia central floodplain Lake

In order to evaluate the role of heterotrophic bacteria on carbon flow in food chains of an Amazonian floodplain lake, monthly collections of these organisms were made during the hydrological year from December 2007 to November 2008. Littoral, pelagic, and aquatic macrophyte regions of the Catalão L...

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Autor principal: Caraballo, Pedro E.
Outros Autores: Forsberg, Bruce Rider, Leite, Rosseval Galdino
Grau: Artigo
Idioma: English
Publicado em: Acta Biologica Colombiana 2020
Assuntos:
Bacteria (microorganisms)
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/18039
id oai:repositorio:1-18039
recordtype dspace
spelling oai:repositorio:1-18039 The trophic role of microbial loop in an amazonia central floodplain Lake Papel trófico del microbial loop en un lago de inundación en la amazonía central Caraballo, Pedro E. Forsberg, Bruce Rider Leite, Rosseval Galdino Bacteria (microorganisms) In order to evaluate the role of heterotrophic bacteria on carbon flow in food chains of an Amazonian floodplain lake, monthly collections of these organisms were made during the hydrological year from December 2007 to November 2008. Littoral, pelagic, and aquatic macrophyte regions of the Catalão Lake in Central Amazonia were sampled and bacteria were multiplied in vitro, using dissolved organic carbon (COD) of each one of the regions studied as a substrate. The bacterial biomass obtained was used for stable isotope analyses of carbon and nitrogen. These data were confronted with COD values of the four hydrological periods of the lake (dry, rising, flood and fall). In general, it was found that the main source of carbon for heterotrophic bacteria was that of C4 origin, which presented a minimum contribution of 75% of bacterial biomass, to the extent that the bacteria δ13C average value was -17.72 ‰ ± 2.25. Comparing this value with the δ13C of zooplankton in the same period (-33.04 ‰ ± 3.81) permit concludes that the contribution of heterotrophic bacteria in the carbon flow to higher trophic levels in the Catalão lake is minimal. 2020-06-15T21:51:10Z 2020-06-15T21:51:10Z 2012 Artigo https://repositorio.inpa.gov.br/handle/1/18039 en Volume 17, Número 1, Pags. 103-116 Restrito Acta Biologica Colombiana
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Bacteria (microorganisms)
spellingShingle Bacteria (microorganisms)
Caraballo, Pedro E.
The trophic role of microbial loop in an amazonia central floodplain Lake
topic_facet Bacteria (microorganisms)
description In order to evaluate the role of heterotrophic bacteria on carbon flow in food chains of an Amazonian floodplain lake, monthly collections of these organisms were made during the hydrological year from December 2007 to November 2008. Littoral, pelagic, and aquatic macrophyte regions of the Catalão Lake in Central Amazonia were sampled and bacteria were multiplied in vitro, using dissolved organic carbon (COD) of each one of the regions studied as a substrate. The bacterial biomass obtained was used for stable isotope analyses of carbon and nitrogen. These data were confronted with COD values of the four hydrological periods of the lake (dry, rising, flood and fall). In general, it was found that the main source of carbon for heterotrophic bacteria was that of C4 origin, which presented a minimum contribution of 75% of bacterial biomass, to the extent that the bacteria δ13C average value was -17.72 ‰ ± 2.25. Comparing this value with the δ13C of zooplankton in the same period (-33.04 ‰ ± 3.81) permit concludes that the contribution of heterotrophic bacteria in the carbon flow to higher trophic levels in the Catalão lake is minimal.
format Artigo
author Caraballo, Pedro E.
author2 Forsberg, Bruce Rider
Leite, Rosseval Galdino
author2Str Forsberg, Bruce Rider
Leite, Rosseval Galdino
title The trophic role of microbial loop in an amazonia central floodplain Lake
title_short The trophic role of microbial loop in an amazonia central floodplain Lake
title_full The trophic role of microbial loop in an amazonia central floodplain Lake
title_fullStr The trophic role of microbial loop in an amazonia central floodplain Lake
title_full_unstemmed The trophic role of microbial loop in an amazonia central floodplain Lake
title_sort trophic role of microbial loop in an amazonia central floodplain lake
publisher Acta Biologica Colombiana
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/18039
_version_ 1787144903670628352
score 11.755432

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