Is Oligotrophy an Equalizing Factor Driving Microplankton Species Functional Diversity Within Agulhas Rings?
From the southwestern termination of the Agulhas current, anticyclonic eddies are emitted and drift across the South Atlantic Ocean. This study is based on a FORSA (Following Ocean Rings in the South Atlantic) oceanographic cruise, from Cape Town (South AFRica) to Arraial do Cabo (Brazil) in June 20...
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2020
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Online Access: | https://doi.org/10.3389/fmars.2020.599185 https://doaj.org/article/84d118b3a7c64f5fb407b58a0d2b1454 |
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ftdoajarticles:oai:doaj.org/article:84d118b3a7c64f5fb407b58a0d2b1454 2023-05-15T18:21:16+02:00 Is Oligotrophy an Equalizing Factor Driving Microplankton Species Functional Diversity Within Agulhas Rings? Caio Cesar-Ribeiro Fernanda R. Piedras Leticia C. da Cunha Domênica T. de Lima Luana Q. Pinho Gleyci A. O. Moser 2020-12-01T00:00:00Z https://doi.org/10.3389/fmars.2020.599185 https://doaj.org/article/84d118b3a7c64f5fb407b58a0d2b1454 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2020.599185/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.599185 https://doaj.org/article/84d118b3a7c64f5fb407b58a0d2b1454 Frontiers in Marine Science, Vol 7 (2020) microplankton neutrality mixotrophy functional traits Agulhas rings Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2020 ftdoajarticles https://doi.org/10.3389/fmars.2020.599185 2022-12-31T07:49:35Z From the southwestern termination of the Agulhas current, anticyclonic eddies are emitted and drift across the South Atlantic Ocean. This study is based on a FORSA (Following Ocean Rings in the South Atlantic) oceanographic cruise, from Cape Town (South AFRica) to Arraial do Cabo (Brazil) in June 2015, during which three eddies of different ages (E1, 7 months; E3, 11 months; E5, 24 months) from the Agulhas current were sampled for microplankton identification and determination of functional traits. The stations where sampling occurred at each eddy included a control outside the eddy and three stations inside the eddy—border, midway (between the border and center), and center (identified through satellite images of sea level anomaly—SLA). Functional traits were determined based on microscopic observations and consultation of the literature. An evident decay in the Agulhas eddies toward the west was observed, and each eddy proved to be different. E1 represented a younger and more robust structure. At the same time, the other eddies, E3 and E5, were more alike with similar physical, chemical, and ecological characteristics and almost the same indices values of functional diversity, demonstrating that although their species compositions were different, the strategies used by the species were the same. The most crucial ecological trait for microplankton was nutrition mode. The microplankton contained mainly mixotrophic dinoflagellates and cyanobacteria adapted to oligotrophic conditions. The functional strategy of microplankton did not differ among the eddies and stations, with mixotrophy being the most striking trait. Therefore, the older eddies’ microplankton community fits the neutrality theory, whereby species perform similar ecological functions, and the younger eddy fits in the niche complementarity. Even with the species composition being different in each eddy and/or within the same eddy, the functional strategy was the same, with scarce resources and species selected that best use any source of nutrients or ... Article in Journal/Newspaper South Atlantic Ocean Directory of Open Access Journals: DOAJ Articles Forsa ENVELOPE(16.122,16.122,68.154,68.154) Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
microplankton neutrality mixotrophy functional traits Agulhas rings Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
microplankton neutrality mixotrophy functional traits Agulhas rings Science Q General. Including nature conservation geographical distribution QH1-199.5 Caio Cesar-Ribeiro Fernanda R. Piedras Leticia C. da Cunha Domênica T. de Lima Luana Q. Pinho Gleyci A. O. Moser Is Oligotrophy an Equalizing Factor Driving Microplankton Species Functional Diversity Within Agulhas Rings? |
topic_facet |
microplankton neutrality mixotrophy functional traits Agulhas rings Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
From the southwestern termination of the Agulhas current, anticyclonic eddies are emitted and drift across the South Atlantic Ocean. This study is based on a FORSA (Following Ocean Rings in the South Atlantic) oceanographic cruise, from Cape Town (South AFRica) to Arraial do Cabo (Brazil) in June 2015, during which three eddies of different ages (E1, 7 months; E3, 11 months; E5, 24 months) from the Agulhas current were sampled for microplankton identification and determination of functional traits. The stations where sampling occurred at each eddy included a control outside the eddy and three stations inside the eddy—border, midway (between the border and center), and center (identified through satellite images of sea level anomaly—SLA). Functional traits were determined based on microscopic observations and consultation of the literature. An evident decay in the Agulhas eddies toward the west was observed, and each eddy proved to be different. E1 represented a younger and more robust structure. At the same time, the other eddies, E3 and E5, were more alike with similar physical, chemical, and ecological characteristics and almost the same indices values of functional diversity, demonstrating that although their species compositions were different, the strategies used by the species were the same. The most crucial ecological trait for microplankton was nutrition mode. The microplankton contained mainly mixotrophic dinoflagellates and cyanobacteria adapted to oligotrophic conditions. The functional strategy of microplankton did not differ among the eddies and stations, with mixotrophy being the most striking trait. Therefore, the older eddies’ microplankton community fits the neutrality theory, whereby species perform similar ecological functions, and the younger eddy fits in the niche complementarity. Even with the species composition being different in each eddy and/or within the same eddy, the functional strategy was the same, with scarce resources and species selected that best use any source of nutrients or ... |
format |
Article in Journal/Newspaper |
author |
Caio Cesar-Ribeiro Fernanda R. Piedras Leticia C. da Cunha Domênica T. de Lima Luana Q. Pinho Gleyci A. O. Moser |
author_facet |
Caio Cesar-Ribeiro Fernanda R. Piedras Leticia C. da Cunha Domênica T. de Lima Luana Q. Pinho Gleyci A. O. Moser |
author_sort |
Caio Cesar-Ribeiro |
title |
Is Oligotrophy an Equalizing Factor Driving Microplankton Species Functional Diversity Within Agulhas Rings? |
title_short |
Is Oligotrophy an Equalizing Factor Driving Microplankton Species Functional Diversity Within Agulhas Rings? |
title_full |
Is Oligotrophy an Equalizing Factor Driving Microplankton Species Functional Diversity Within Agulhas Rings? |
title_fullStr |
Is Oligotrophy an Equalizing Factor Driving Microplankton Species Functional Diversity Within Agulhas Rings? |
title_full_unstemmed |
Is Oligotrophy an Equalizing Factor Driving Microplankton Species Functional Diversity Within Agulhas Rings? |
title_sort |
is oligotrophy an equalizing factor driving microplankton species functional diversity within agulhas rings? |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.599185 https://doaj.org/article/84d118b3a7c64f5fb407b58a0d2b1454 |
long_lat |
ENVELOPE(16.122,16.122,68.154,68.154) |
geographic |
Forsa |
geographic_facet |
Forsa |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Frontiers in Marine Science, Vol 7 (2020) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2020.599185/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.599185 https://doaj.org/article/84d118b3a7c64f5fb407b58a0d2b1454 |
op_doi |
https://doi.org/10.3389/fmars.2020.599185 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766200445641949184 |