Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?

Autores
Segovia, Bianca T.; Domingues, Carolina D.; Meira, Bianca R.; Lansac Toha, Fernando M.; Fermani, Paulina; Unrein, Fernando; Lobão, Lúcia M.; Roland, Fabio; Velho, Luiz F. M.; Preto de Morais Sarmento, Hugo Miguel
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Recent studies reported comparatively lower heterotrophic bacteria (HB) abundances in tropical regions, indicating that factors involved in bacterial losses could be more relevant in the tropics. Heterotrophic nanoflagellates (HNF) are considered the main predators of HB in aquatic ecosystems, and one should expect higher abundances in the tropics because of differences in the food web configuration (absence of large daphnids). However, there are no comprehensive studies comparing HB and HNF abundances in a latitudinal gradient. We hypothesized that HB abundance would be lower in the tropics because HNF abundance would be higher, resulting in a tighter HNF-HB coupling. To test this hypothesis, we compiled a large dataset of HB and HNF abundances from tropical and temperate freshwater environments. We found that both HB and HNF abundances were lower in the tropical region, and that HNF-HB coupling does not differ between temperate and tropical regions. The lower HNF abundance and lack of coupling may be explained by a strong top-down control on HNF and/or their herbivory preference. Besides, no relationship was found between bacterial specific growth rate and either chlorophyll-a and HB abundance, indicating that bacterial losses may have an important role in tropical freshwaters. Thus, we found that HNF is likely not the main controllers of HB abundance, and that grazing by ciliates and cladocerans, together with the physiological effects of higher temperatures, may explain the high bacterial loss rates in the tropics.
Fil: Segovia, Bianca T.. Universidade Estadual de Maringá; Brasil
Fil: Domingues, Carolina D.. Universidade Federal do Rio de Janeiro; Brasil
Fil: Meira, Bianca R.. Universidade Estadual de Maringá; Brasil
Fil: Lansac Toha, Fernando M.. Universidade Estadual de Maringá; Brasil
Fil: Fermani, Paulina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas ; Argentina
Fil: Unrein, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas ; Argentina
Fil: Lobão, Lúcia M.. Universidade Federal de Juiz de Fora; Brasil
Fil: Roland, Fabio. Universidade Federal de Juiz de Fora; Brasil
Fil: Velho, Luiz F. M.. Universidade Estadual de Maringá; Brasil
Fil: Preto de Morais Sarmento, Hugo Miguel. Universidade Federal do São Carlos; Brasil
Materia
BACTERIOPLANKTON
CLADOCERA
LATITUDE
PREDATION
PROTIST
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/54078
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?Segovia, Bianca T.Domingues, Carolina D.Meira, Bianca R.Lansac Toha, Fernando M.Fermani, PaulinaUnrein, FernandoLobão, Lúcia M.Roland, FabioVelho, Luiz F. M.Preto de Morais Sarmento, Hugo MiguelBACTERIOPLANKTONCLADOCERALATITUDEPREDATIONPROTISThttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Recent studies reported comparatively lower heterotrophic bacteria (HB) abundances in tropical regions, indicating that factors involved in bacterial losses could be more relevant in the tropics. Heterotrophic nanoflagellates (HNF) are considered the main predators of HB in aquatic ecosystems, and one should expect higher abundances in the tropics because of differences in the food web configuration (absence of large daphnids). However, there are no comprehensive studies comparing HB and HNF abundances in a latitudinal gradient. We hypothesized that HB abundance would be lower in the tropics because HNF abundance would be higher, resulting in a tighter HNF-HB coupling. To test this hypothesis, we compiled a large dataset of HB and HNF abundances from tropical and temperate freshwater environments. We found that both HB and HNF abundances were lower in the tropical region, and that HNF-HB coupling does not differ between temperate and tropical regions. The lower HNF abundance and lack of coupling may be explained by a strong top-down control on HNF and/or their herbivory preference. Besides, no relationship was found between bacterial specific growth rate and either chlorophyll-a and HB abundance, indicating that bacterial losses may have an important role in tropical freshwaters. Thus, we found that HNF is likely not the main controllers of HB abundance, and that grazing by ciliates and cladocerans, together with the physiological effects of higher temperatures, may explain the high bacterial loss rates in the tropics.Fil: Segovia, Bianca T.. Universidade Estadual de Maringá; BrasilFil: Domingues, Carolina D.. Universidade Federal do Rio de Janeiro; BrasilFil: Meira, Bianca R.. Universidade Estadual de Maringá; BrasilFil: Lansac Toha, Fernando M.. Universidade Estadual de Maringá; BrasilFil: Fermani, Paulina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas ; ArgentinaFil: Unrein, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas ; ArgentinaFil: Lobão, Lúcia M.. Universidade Federal de Juiz de Fora; BrasilFil: Roland, Fabio. Universidade Federal de Juiz de Fora; BrasilFil: Velho, Luiz F. M.. Universidade Estadual de Maringá; BrasilFil: Preto de Morais Sarmento, Hugo Miguel. Universidade Federal do São Carlos; BrasilFrontiers Research Foundation2016-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54078Segovia, Bianca T.; Domingues, Carolina D.; Meira, Bianca R.; Lansac Toha, Fernando M.; Fermani, Paulina; et al.; Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?; Frontiers Research Foundation; Frontiers in Microbiology; 7; 114; 2-2016; 1-111664-302XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3389/fmicb.2016.00114info:eu-repo/semantics/altIdentifier/url/https://www.frontiersin.org/articles/10.3389/fmicb.2016.00114/fullinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:46:45Zoai:ri.conicet.gov.ar:11336/54078instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:46:45.932CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?
title Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?
spellingShingle Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?
Segovia, Bianca T.
BACTERIOPLANKTON
CLADOCERA
LATITUDE
PREDATION
PROTIST
title_short Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?
title_full Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?
title_fullStr Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?
title_full_unstemmed Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?
title_sort Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?
dc.creator.none.fl_str_mv Segovia, Bianca T.
Domingues, Carolina D.
Meira, Bianca R.
Lansac Toha, Fernando M.
Fermani, Paulina
Unrein, Fernando
Lobão, Lúcia M.
Roland, Fabio
Velho, Luiz F. M.
Preto de Morais Sarmento, Hugo Miguel
author Segovia, Bianca T.
author_facet Segovia, Bianca T.
Domingues, Carolina D.
Meira, Bianca R.
Lansac Toha, Fernando M.
Fermani, Paulina
Unrein, Fernando
Lobão, Lúcia M.
Roland, Fabio
Velho, Luiz F. M.
Preto de Morais Sarmento, Hugo Miguel
author_role author
author2 Domingues, Carolina D.
Meira, Bianca R.
Lansac Toha, Fernando M.
Fermani, Paulina
Unrein, Fernando
Lobão, Lúcia M.
Roland, Fabio
Velho, Luiz F. M.
Preto de Morais Sarmento, Hugo Miguel
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv BACTERIOPLANKTON
CLADOCERA
LATITUDE
PREDATION
PROTIST
topic BACTERIOPLANKTON
CLADOCERA
LATITUDE
PREDATION
PROTIST
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Recent studies reported comparatively lower heterotrophic bacteria (HB) abundances in tropical regions, indicating that factors involved in bacterial losses could be more relevant in the tropics. Heterotrophic nanoflagellates (HNF) are considered the main predators of HB in aquatic ecosystems, and one should expect higher abundances in the tropics because of differences in the food web configuration (absence of large daphnids). However, there are no comprehensive studies comparing HB and HNF abundances in a latitudinal gradient. We hypothesized that HB abundance would be lower in the tropics because HNF abundance would be higher, resulting in a tighter HNF-HB coupling. To test this hypothesis, we compiled a large dataset of HB and HNF abundances from tropical and temperate freshwater environments. We found that both HB and HNF abundances were lower in the tropical region, and that HNF-HB coupling does not differ between temperate and tropical regions. The lower HNF abundance and lack of coupling may be explained by a strong top-down control on HNF and/or their herbivory preference. Besides, no relationship was found between bacterial specific growth rate and either chlorophyll-a and HB abundance, indicating that bacterial losses may have an important role in tropical freshwaters. Thus, we found that HNF is likely not the main controllers of HB abundance, and that grazing by ciliates and cladocerans, together with the physiological effects of higher temperatures, may explain the high bacterial loss rates in the tropics.
Fil: Segovia, Bianca T.. Universidade Estadual de Maringá; Brasil
Fil: Domingues, Carolina D.. Universidade Federal do Rio de Janeiro; Brasil
Fil: Meira, Bianca R.. Universidade Estadual de Maringá; Brasil
Fil: Lansac Toha, Fernando M.. Universidade Estadual de Maringá; Brasil
Fil: Fermani, Paulina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas ; Argentina
Fil: Unrein, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas ; Argentina
Fil: Lobão, Lúcia M.. Universidade Federal de Juiz de Fora; Brasil
Fil: Roland, Fabio. Universidade Federal de Juiz de Fora; Brasil
Fil: Velho, Luiz F. M.. Universidade Estadual de Maringá; Brasil
Fil: Preto de Morais Sarmento, Hugo Miguel. Universidade Federal do São Carlos; Brasil
description Recent studies reported comparatively lower heterotrophic bacteria (HB) abundances in tropical regions, indicating that factors involved in bacterial losses could be more relevant in the tropics. Heterotrophic nanoflagellates (HNF) are considered the main predators of HB in aquatic ecosystems, and one should expect higher abundances in the tropics because of differences in the food web configuration (absence of large daphnids). However, there are no comprehensive studies comparing HB and HNF abundances in a latitudinal gradient. We hypothesized that HB abundance would be lower in the tropics because HNF abundance would be higher, resulting in a tighter HNF-HB coupling. To test this hypothesis, we compiled a large dataset of HB and HNF abundances from tropical and temperate freshwater environments. We found that both HB and HNF abundances were lower in the tropical region, and that HNF-HB coupling does not differ between temperate and tropical regions. The lower HNF abundance and lack of coupling may be explained by a strong top-down control on HNF and/or their herbivory preference. Besides, no relationship was found between bacterial specific growth rate and either chlorophyll-a and HB abundance, indicating that bacterial losses may have an important role in tropical freshwaters. Thus, we found that HNF is likely not the main controllers of HB abundance, and that grazing by ciliates and cladocerans, together with the physiological effects of higher temperatures, may explain the high bacterial loss rates in the tropics.
publishDate 2016
dc.date.none.fl_str_mv 2016-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/54078
Segovia, Bianca T.; Domingues, Carolina D.; Meira, Bianca R.; Lansac Toha, Fernando M.; Fermani, Paulina; et al.; Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?; Frontiers Research Foundation; Frontiers in Microbiology; 7; 114; 2-2016; 1-11
1664-302X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54078
identifier_str_mv Segovia, Bianca T.; Domingues, Carolina D.; Meira, Bianca R.; Lansac Toha, Fernando M.; Fermani, Paulina; et al.; Coupling between heterotrophic nanoflagellates and bacteria in fresh waters: Does latitude make a difference?; Frontiers Research Foundation; Frontiers in Microbiology; 7; 114; 2-2016; 1-11
1664-302X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3389/fmicb.2016.00114
info:eu-repo/semantics/altIdentifier/url/https://www.frontiersin.org/articles/10.3389/fmicb.2016.00114/full
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Frontiers Research Foundation
publisher.none.fl_str_mv Frontiers Research Foundation
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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