Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean
It has long been assumed that the population dynamics of planktonic foraminifera is characterised by synchronous reproduction associated with ontogenetic vertical migration. However, due to contradictory observations, this concept became controversial, and subsequent studies provided evidence both i...
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ftdoajarticles:oai:doaj.org/article:5c23b5413c324257aa028f9e2682b235 2023-05-15T18:00:24+02:00 Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean J. Meilland M. Siccha M. Kaffenberger J. Bijma M. Kucera 2021-10-01T00:00:00Z https://doi.org/10.5194/bg-18-5789-2021 https://doaj.org/article/5c23b5413c324257aa028f9e2682b235 EN eng Copernicus Publications https://bg.copernicus.org/articles/18/5789/2021/bg-18-5789-2021.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-18-5789-2021 1726-4170 1726-4189 https://doaj.org/article/5c23b5413c324257aa028f9e2682b235 Biogeosciences, Vol 18, Pp 5789-5809 (2021) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/bg-18-5789-2021 2022-12-31T11:49:14Z It has long been assumed that the population dynamics of planktonic foraminifera is characterised by synchronous reproduction associated with ontogenetic vertical migration. However, due to contradictory observations, this concept became controversial, and subsequent studies provided evidence both in favour and against these phenomena. Here we present new observations from replicated vertically resolved profiles of abundance and shell size variation in four species of planktonic foraminifera from the tropical Atlantic to test for the presence, pattern, and extent of synchronised reproduction and ontogenetic vertical migration in this oceanic region. Specimens of Globigerinita glutinata , Globigerinoides ruber ruber , Globorotalia menardii and Orbulina universa were collected over the first 700 m resolved at nine depth intervals at nine stations over a period of 14 d. Dead specimens were systematically observed irrespective of the depth interval, sampling day and size. Conversely, specimens in the smaller size fractions dominated the sampled populations at all times and were recorded at all depths, indicating that reproduction might have occurred continuously and throughout the occupied part of the water column. However, a closer look at the vertical and temporal size distribution of specimens within each species revealed an overrepresentation of large specimens in depths at the beginning of the sampling (shortly after the full moon) and an overrepresentation of small individuals at the surface and subsurface by the end of the sampling (around new moon). These observations imply that a disproportionately large portion of the population followed for each species a canonical reproductive trajectory, which involved synchronised reproduction and ontogenetic vertical migration with the descent of progressively maturing individuals. This concept is consistent with the initial observations from the Red Sea, on which the reproductive dynamics of planktonic foraminifera has been modelled. Our data extend this model to ... Article in Journal/Newspaper Planktonic foraminifera Directory of Open Access Journals: DOAJ Articles Biogeosciences 18 20 5789 5809 |
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Directory of Open Access Journals: DOAJ Articles |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 J. Meilland M. Siccha M. Kaffenberger J. Bijma M. Kucera Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
It has long been assumed that the population dynamics of planktonic foraminifera is characterised by synchronous reproduction associated with ontogenetic vertical migration. However, due to contradictory observations, this concept became controversial, and subsequent studies provided evidence both in favour and against these phenomena. Here we present new observations from replicated vertically resolved profiles of abundance and shell size variation in four species of planktonic foraminifera from the tropical Atlantic to test for the presence, pattern, and extent of synchronised reproduction and ontogenetic vertical migration in this oceanic region. Specimens of Globigerinita glutinata , Globigerinoides ruber ruber , Globorotalia menardii and Orbulina universa were collected over the first 700 m resolved at nine depth intervals at nine stations over a period of 14 d. Dead specimens were systematically observed irrespective of the depth interval, sampling day and size. Conversely, specimens in the smaller size fractions dominated the sampled populations at all times and were recorded at all depths, indicating that reproduction might have occurred continuously and throughout the occupied part of the water column. However, a closer look at the vertical and temporal size distribution of specimens within each species revealed an overrepresentation of large specimens in depths at the beginning of the sampling (shortly after the full moon) and an overrepresentation of small individuals at the surface and subsurface by the end of the sampling (around new moon). These observations imply that a disproportionately large portion of the population followed for each species a canonical reproductive trajectory, which involved synchronised reproduction and ontogenetic vertical migration with the descent of progressively maturing individuals. This concept is consistent with the initial observations from the Red Sea, on which the reproductive dynamics of planktonic foraminifera has been modelled. Our data extend this model to ... |
format |
Article in Journal/Newspaper |
author |
J. Meilland M. Siccha M. Kaffenberger J. Bijma M. Kucera |
author_facet |
J. Meilland M. Siccha M. Kaffenberger J. Bijma M. Kucera |
author_sort |
J. Meilland |
title |
Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean |
title_short |
Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean |
title_full |
Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean |
title_fullStr |
Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean |
title_full_unstemmed |
Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean |
title_sort |
population dynamics and reproduction strategies of planktonic foraminifera in the open ocean |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/bg-18-5789-2021 https://doaj.org/article/5c23b5413c324257aa028f9e2682b235 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Biogeosciences, Vol 18, Pp 5789-5809 (2021) |
op_relation |
https://bg.copernicus.org/articles/18/5789/2021/bg-18-5789-2021.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-18-5789-2021 1726-4170 1726-4189 https://doaj.org/article/5c23b5413c324257aa028f9e2682b235 |
op_doi |
https://doi.org/10.5194/bg-18-5789-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
20 |
container_start_page |
5789 |
op_container_end_page |
5809 |
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