Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments
The genus Pseudopedinella has been described as mixotrophic; however, ecological information about this algal stramenopile (Heterokonta) is unclear. We investigate the environmental conditions that determine the presence, abundance and bacterivory rates of this genus in freshwater systems. To this e...
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ftconicet:oai:ri.conicet.gov.ar:11336/54746 2023-10-09T21:46:13+02:00 Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments Gerea, Marina Saad, Juan Francisco Izaguirre, Irina Queimaliños, Claudia Patricia Gasol, Josep M. Unrein, Fernando application/pdf http://hdl.handle.net/11336/54746 eng eng Inter-Research info:eu-repo/semantics/altIdentifier/doi/10.3354/ame01780 info:eu-repo/semantics/altIdentifier/url/https://www.int-res.com/abstracts/ame/v76/n3/p219-232/ http://hdl.handle.net/11336/54746 Gerea, Marina; Saad, Juan Francisco; Izaguirre, Irina; Queimaliños, Claudia Patricia; Gasol, Josep M.; et al.; Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments; Inter-Research; Aquatic Microbial Ecology; 76; 3; 2-2016; 219-232 0948-3055 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ANTARCTIC LAKES BACTERIVORY GRAZING RATE PATAGONIAN LAKES PSEUDOPEDINELLA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.3354/ame01780 2023-09-24T19:21:35Z The genus Pseudopedinella has been described as mixotrophic; however, ecological information about this algal stramenopile (Heterokonta) is unclear. We investigate the environmental conditions that determine the presence, abundance and bacterivory rates of this genus in freshwater systems. To this end we analyzed 54 water bodies with different limnological features distributed along a latitudinal and trophic gradient in northern Patagonia (Argentina) and the Antarctic Peninsula. In addition, 14 grazing experiments were carried out in order to estimate ingestion rates and impact on the bacterioplankton. Our results indicate that this genus is exclusively found in oligotrophic environments, and that it develops well in a wide range of temperatures. Average cell-specific grazing rate was 2.83 bacteria cell-1 h-1, with a maximum value of 6.74 bacteria ml-1 h-1. Interestingly, grazing increased with prey abundance and decreased with increasing nutrient availability. These patterns are common in highly bacterivorous protists that use phagotrophy as a main source of nutrient acquisition. Despite their usually low abundance (avg. 182 cells ml-1), this single genus was responsible for up to 24% (avg. 10%) of the total grazing impact exerted by all phagotrophs in these lakes. Overall, our results support the idea that Pseudopedinella is a highly bacterivorous group of freshwater protists, with the ability to develop well in oligotrophic conditions and with a potentially significant impact on bacterioplankton. Fil: Gerea, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina Fil: Saad, Juan Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Antarctic Peninsula Patagonia Argentina Aquatic Microbial Ecology 76 3 219 232 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ANTARCTIC LAKES BACTERIVORY GRAZING RATE PATAGONIAN LAKES PSEUDOPEDINELLA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
ANTARCTIC LAKES BACTERIVORY GRAZING RATE PATAGONIAN LAKES PSEUDOPEDINELLA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Gerea, Marina Saad, Juan Francisco Izaguirre, Irina Queimaliños, Claudia Patricia Gasol, Josep M. Unrein, Fernando Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments |
topic_facet |
ANTARCTIC LAKES BACTERIVORY GRAZING RATE PATAGONIAN LAKES PSEUDOPEDINELLA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The genus Pseudopedinella has been described as mixotrophic; however, ecological information about this algal stramenopile (Heterokonta) is unclear. We investigate the environmental conditions that determine the presence, abundance and bacterivory rates of this genus in freshwater systems. To this end we analyzed 54 water bodies with different limnological features distributed along a latitudinal and trophic gradient in northern Patagonia (Argentina) and the Antarctic Peninsula. In addition, 14 grazing experiments were carried out in order to estimate ingestion rates and impact on the bacterioplankton. Our results indicate that this genus is exclusively found in oligotrophic environments, and that it develops well in a wide range of temperatures. Average cell-specific grazing rate was 2.83 bacteria cell-1 h-1, with a maximum value of 6.74 bacteria ml-1 h-1. Interestingly, grazing increased with prey abundance and decreased with increasing nutrient availability. These patterns are common in highly bacterivorous protists that use phagotrophy as a main source of nutrient acquisition. Despite their usually low abundance (avg. 182 cells ml-1), this single genus was responsible for up to 24% (avg. 10%) of the total grazing impact exerted by all phagotrophs in these lakes. Overall, our results support the idea that Pseudopedinella is a highly bacterivorous group of freshwater protists, with the ability to develop well in oligotrophic conditions and with a potentially significant impact on bacterioplankton. Fil: Gerea, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina Fil: Saad, Juan Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, ... |
format |
Article in Journal/Newspaper |
author |
Gerea, Marina Saad, Juan Francisco Izaguirre, Irina Queimaliños, Claudia Patricia Gasol, Josep M. Unrein, Fernando |
author_facet |
Gerea, Marina Saad, Juan Francisco Izaguirre, Irina Queimaliños, Claudia Patricia Gasol, Josep M. Unrein, Fernando |
author_sort |
Gerea, Marina |
title |
Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments |
title_short |
Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments |
title_full |
Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments |
title_fullStr |
Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments |
title_full_unstemmed |
Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments |
title_sort |
presence, abundance and bacterivory of the mixotrophic algae pseudopedinella (dictyochophyceae) in freshwater environments |
publisher |
Inter-Research |
url |
http://hdl.handle.net/11336/54746 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Patagonia Argentina |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Patagonia Argentina |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/ame01780 info:eu-repo/semantics/altIdentifier/url/https://www.int-res.com/abstracts/ame/v76/n3/p219-232/ http://hdl.handle.net/11336/54746 Gerea, Marina; Saad, Juan Francisco; Izaguirre, Irina; Queimaliños, Claudia Patricia; Gasol, Josep M.; et al.; Presence, abundance and bacterivory of the mixotrophic algae Pseudopedinella (Dictyochophyceae) in freshwater environments; Inter-Research; Aquatic Microbial Ecology; 76; 3; 2-2016; 219-232 0948-3055 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.3354/ame01780 |
container_title |
Aquatic Microbial Ecology |
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76 |
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3 |
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219 |
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232 |
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1779321873240162304 |