Life and death of Crocosphaera sp. in the Pacific Ocean: Fine scale predator–prey dynamics.
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| Title: | Life and death of Crocosphaera sp. in the Pacific Ocean: Fine scale predator–prey dynamics. |
|---|---|
| Authors: | Dugenne, Mathilde1 (AUTHOR) dugennem@hawaii.edu, Henderikx Freitas, Fernanda1 (AUTHOR), Wilson, Samuel T.1 (AUTHOR), Karl, David M.1 (AUTHOR), White, Angelicque E.1 (AUTHOR) |
| Source: | Limnology & Oceanography. Nov2020, Vol. 65 Issue 11, p2603-2617. 15p. |
| Subjects: | Predation, Mesoscale eddies, Ocean, Flow cytometry, Time series analysis, Plankton |
| Abstract: | In the North Pacific Subtropical Gyre, the daily pulse of photosynthetic carbon (C) fixation is closely balanced by losses. This concert of growth and loss is driven by a diverse assemblage of plankton, including the diazotroph Crocosphaera sp. While primary production is relatively well characterized in this ecosystem, the extent of C transfer to secondary producers is poorly constrained. Here, we use automated imaging flow cytometry and population modeling to study the coupling of C production by Crocosphaera and subsequent grazing by nanoplanktonic protists. Crocosphaera cells represent on average 30% of the nanoplankton detected by the Imaging FlowCytoBot in the surface layer of mesoscale eddies during summertime. The size spectra show a maximum in the frequency of Crocosphaera doublet cells just prior to mitotic division at midday, with an average estimated growth rate of 0.8 ± 0.5 d−1. We also identified potential predators by fitting a Lotka–Volterra model to plankton time series observations. Significant predators include the dinoflagellates Protoperidinium and Dinophysis as well as the ciliate Strombidium, which were all imaged with Crocosphaera in food vacuoles. The estimated C demand of the main grazers fluctuated between 25% and 250% of Crocosphaera new production in an anticyclonic eddy where we observed the onset of a Crocosphaera‐driven bloom. Heterotrophic Protoperidinium drove most of the estimated C demand, with grazing rates nearly equivalent to Crocosphaera growth rates (0.6 ± 0.4 d−1 on average), but saturating at high prey concentrations. Our novel results demonstrate tight coupling between specific protistan predators and a diazotrophic prey. [ABSTRACT FROM AUTHOR] |
| Copyright of Limnology & Oceanography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 147243930 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Life and death of Crocosphaera sp. in the Pacific Ocean: Fine scale predator–prey dynamics. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Dugenne%2C+Mathilde%22">Dugenne, Mathilde</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dugennem@hawaii.edu</i><br /><searchLink fieldCode="AR" term="%22Henderikx+Freitas%2C+Fernanda%22">Henderikx Freitas, Fernanda</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wilson%2C+Samuel+T%2E%22">Wilson, Samuel T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Karl%2C+David+M%2E%22">Karl, David M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22White%2C+Angelicque+E%2E%22">White, Angelicque E.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Limnology+%26+Oceanography%22">Limnology & Oceanography</searchLink>. Nov2020, Vol. 65 Issue 11, p2603-2617. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Predation%22">Predation</searchLink><br /><searchLink fieldCode="DE" term="%22Mesoscale+eddies%22">Mesoscale eddies</searchLink><br /><searchLink fieldCode="DE" term="%22Ocean%22">Ocean</searchLink><br /><searchLink fieldCode="DE" term="%22Flow+cytometry%22">Flow cytometry</searchLink><br /><searchLink fieldCode="DE" term="%22Time+series+analysis%22">Time series analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Plankton%22">Plankton</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In the North Pacific Subtropical Gyre, the daily pulse of photosynthetic carbon (C) fixation is closely balanced by losses. This concert of growth and loss is driven by a diverse assemblage of plankton, including the diazotroph Crocosphaera sp. While primary production is relatively well characterized in this ecosystem, the extent of C transfer to secondary producers is poorly constrained. Here, we use automated imaging flow cytometry and population modeling to study the coupling of C production by Crocosphaera and subsequent grazing by nanoplanktonic protists. Crocosphaera cells represent on average 30% of the nanoplankton detected by the Imaging FlowCytoBot in the surface layer of mesoscale eddies during summertime. The size spectra show a maximum in the frequency of Crocosphaera doublet cells just prior to mitotic division at midday, with an average estimated growth rate of 0.8 ± 0.5 d−1. We also identified potential predators by fitting a Lotka–Volterra model to plankton time series observations. Significant predators include the dinoflagellates Protoperidinium and Dinophysis as well as the ciliate Strombidium, which were all imaged with Crocosphaera in food vacuoles. The estimated C demand of the main grazers fluctuated between 25% and 250% of Crocosphaera new production in an anticyclonic eddy where we observed the onset of a Crocosphaera‐driven bloom. Heterotrophic Protoperidinium drove most of the estimated C demand, with grazing rates nearly equivalent to Crocosphaera growth rates (0.6 ± 0.4 d−1 on average), but saturating at high prey concentrations. Our novel results demonstrate tight coupling between specific protistan predators and a diazotrophic prey. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Limnology & Oceanography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/lno.11473 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 2603 Subjects: – SubjectFull: Predation Type: general – SubjectFull: Mesoscale eddies Type: general – SubjectFull: Ocean Type: general – SubjectFull: Flow cytometry Type: general – SubjectFull: Time series analysis Type: general – SubjectFull: Plankton Type: general Titles: – TitleFull: Life and death of Crocosphaera sp. in the Pacific Ocean: Fine scale predator–prey dynamics. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Dugenne, Mathilde – PersonEntity: Name: NameFull: Henderikx Freitas, Fernanda – PersonEntity: Name: NameFull: Wilson, Samuel T. – PersonEntity: Name: NameFull: Karl, David M. – PersonEntity: Name: NameFull: White, Angelicque E. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 11 Text: Nov2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 00243590 Numbering: – Type: volume Value: 65 – Type: issue Value: 11 Titles: – TitleFull: Limnology & Oceanography Type: main |
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