Temporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial Atlantic Ocean
Picoplankton are central global carbon (C) cycling players and often dominate the ocean plankton communities, especially in low latitudes. Therefore, evaluating picoplankton temporal dynamics is critical to understanding microbial stocks and C fluxes in tropical oceans. However, the lack of studies...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Instituto Oceanográfico da Universidade de São Paulo
2024-04-01
|
| Series: | Ocean and Coastal Research |
| Subjects: | |
| Online Access: | https://journals.usp.br/ocr/article/view/222890 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849714113458995200 |
|---|---|
| author | Maiara Menezes Pedro C. Junger Vinicius S. Kavagutti Bruno Wanderley Anderson de Souza Cabral Rodolfo Paranhos Fernando Unrein André M. Amado Hugo Sarmento |
| author_facet | Maiara Menezes Pedro C. Junger Vinicius S. Kavagutti Bruno Wanderley Anderson de Souza Cabral Rodolfo Paranhos Fernando Unrein André M. Amado Hugo Sarmento |
| author_sort | Maiara Menezes |
| collection | DOAJ |
| description |
Picoplankton are central global carbon (C) cycling players and often dominate the ocean plankton communities,
especially in low latitudes. Therefore, evaluating picoplankton temporal dynamics is critical to understanding
microbial stocks and C fluxes in tropical oceans. However, the lack of studies on low-latitude picoplankton
communities translates into a common conception that there is an absence of seasonality. Herein, we studied the
temporal variation in abundance (measured by flow cytometry), and carbon flux (taking bacterial production and
respiration as proxies) of the picoplanktonic community for the first time, as well as their environmental drivers
in a low-latitude (05° 59’ 20.7″S 035° 05’ 14.6″W) Atlantic coastal station. We performed monthly samplings
between February 2013 and August 2016 in a novel microbial observatory – hereafter called the Equatorial Atlantic
Microbial Observatory – established on the northeastern Brazilian Atlantic coast. Our results revealed stability
in temporal dynamics of picoplankton, despite a considerable inter-annual variation, with some related to the El
Niño (ENSO) event in 2015. However, weak environmental relationships found were not enough to explain the
variation in picoplankton’s abundance, which suggests that other factors such as biological interactions may lead
to picoplankton abundance variation over time. Heterotrophic bacteria dominated picoplankton during the entire
study period and between photosynthetic counterparts, and Synechococcus showed greater relative importance
than picoeukaryotes. These results bring a novel perspective that picoplankton may exhibit more pronounced
fluctuations in the tropical region when considering inter-annual intervals, and is increasing prokaryotic contribution
to carbon cycling towards the equator.
|
| format | Article |
| id | doaj-art-8db3486b69174c46b6eed67ad330bc21 |
| institution | DOAJ |
| issn | 2675-2824 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | Instituto Oceanográfico da Universidade de São Paulo |
| record_format | Article |
| series | Ocean and Coastal Research |
| spelling | doaj-art-8db3486b69174c46b6eed67ad330bc212025-08-20T03:13:47ZengInstituto Oceanográfico da Universidade de São PauloOcean and Coastal Research2675-28242024-04-0171Suppl. 210.1590/2675-2824071.22048mmTemporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial Atlantic OceanMaiara MenezesPedro C. JungerVinicius S. KavaguttiBruno WanderleyAnderson de Souza CabralRodolfo ParanhosFernando UnreinAndré M. AmadoHugo Sarmento Picoplankton are central global carbon (C) cycling players and often dominate the ocean plankton communities, especially in low latitudes. Therefore, evaluating picoplankton temporal dynamics is critical to understanding microbial stocks and C fluxes in tropical oceans. However, the lack of studies on low-latitude picoplankton communities translates into a common conception that there is an absence of seasonality. Herein, we studied the temporal variation in abundance (measured by flow cytometry), and carbon flux (taking bacterial production and respiration as proxies) of the picoplanktonic community for the first time, as well as their environmental drivers in a low-latitude (05° 59’ 20.7″S 035° 05’ 14.6″W) Atlantic coastal station. We performed monthly samplings between February 2013 and August 2016 in a novel microbial observatory – hereafter called the Equatorial Atlantic Microbial Observatory – established on the northeastern Brazilian Atlantic coast. Our results revealed stability in temporal dynamics of picoplankton, despite a considerable inter-annual variation, with some related to the El Niño (ENSO) event in 2015. However, weak environmental relationships found were not enough to explain the variation in picoplankton’s abundance, which suggests that other factors such as biological interactions may lead to picoplankton abundance variation over time. Heterotrophic bacteria dominated picoplankton during the entire study period and between photosynthetic counterparts, and Synechococcus showed greater relative importance than picoeukaryotes. These results bring a novel perspective that picoplankton may exhibit more pronounced fluctuations in the tropical region when considering inter-annual intervals, and is increasing prokaryotic contribution to carbon cycling towards the equator. https://journals.usp.br/ocr/article/view/222890Flow cytometryBacterioplanktonPicoeukaryotesCarbon cycling |
| spellingShingle | Maiara Menezes Pedro C. Junger Vinicius S. Kavagutti Bruno Wanderley Anderson de Souza Cabral Rodolfo Paranhos Fernando Unrein André M. Amado Hugo Sarmento Temporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial Atlantic Ocean Ocean and Coastal Research Flow cytometry Bacterioplankton Picoeukaryotes Carbon cycling |
| title | Temporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial Atlantic Ocean |
| title_full | Temporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial Atlantic Ocean |
| title_fullStr | Temporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial Atlantic Ocean |
| title_full_unstemmed | Temporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial Atlantic Ocean |
| title_short | Temporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial Atlantic Ocean |
| title_sort | temporal patterns of picoplankton abundance and metabolism on the western coast of the equatorial atlantic ocean |
| topic | Flow cytometry Bacterioplankton Picoeukaryotes Carbon cycling |
| url | https://journals.usp.br/ocr/article/view/222890 |
| work_keys_str_mv | AT maiaramenezes temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean AT pedrocjunger temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean AT viniciusskavagutti temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean AT brunowanderley temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean AT andersondesouzacabral temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean AT rodolfoparanhos temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean AT fernandounrein temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean AT andremamado temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean AT hugosarmento temporalpatternsofpicoplanktonabundanceandmetabolismonthewesterncoastoftheequatorialatlanticocean |