Trophic pathways of phytoplankton size classes through the zooplankton food web over the spring transition period in the north-west Mediterranean Sea.
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| Title: | Trophic pathways of phytoplankton size classes through the zooplankton food web over the spring transition period in the north-west Mediterranean Sea. |
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| Authors: | Hunt, Brian P. V.1,2,3, Carlotti, François3, Donoso, Katty3, Pagano, Marc3, D'Ortenzio, Fabrizio4, Taillandier, Vincent4, Conan, Pascal5 |
| Source: | Journal of Geophysical Research. Oceans. Aug2017, Vol. 122 Issue 8, p6309-6324. 16p. |
| Abstract: | Knowledge of the relative contributions of phytoplankton size classes to zooplankton biomass is necessary to understand food-web functioning and response to climate change. During the Deep Water formation Experiment (DEWEX), conducted in the north-west Mediterranean Sea in winter (February) and spring (April) of 2013, we investigated phytoplankton-zooplankton trophic links in contrasting oligotrophic and eutrophic conditions. Size fractionated particulate matter (pico-POM, nano-POM, and micro-POM) and zooplankton (64 to >4000 μm) composition and carbon and nitrogen stable isotope ratios were measured inside and outside the nutrient-rich deep convection zone in the central Liguro-Provencal basin. In winter, phytoplankton biomass was low (0.28 mg m−3) and evenly spread among picophytoplankton, nanophytoplankton, and microphytoplankton. Using an isotope mixing model, we estimated average contributions to zooplankton biomass by pico-POM, nano-POM, and micro-POM of 28, 59, and 15%, respectively. In spring, the nutrient poor region outside the convection zone had low phytoplankton biomass (0.58 mg m−3) and was dominated by pico/nanophytoplankton. Estimated average contributions to zooplankton biomass by pico-POM, nano-POM, and micro-POM were 64, 28 and 10%, respectively, although the model did not differentiate well between pico-POM and nano-POM in this region. In the deep convection zone, spring phytoplankton biomass was high (1.34 mg m−3) and dominated by micro/nano phytoplankton. Estimated average contributions to zooplankton biomass by pico-POM, nano-POM, and micro-POM were 42, 42, and 20%, respectively, indicating that a large part of the microphytoplankton biomass may have remained ungrazed. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geophysical Research. Oceans 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.) | |
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| Items | – Name: Title Label: Title Group: Ti Data: Trophic pathways of phytoplankton size classes through the zooplankton food web over the spring transition period in the north-west Mediterranean Sea. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Hunt%2C+Brian+P%2E+V%2E%22">Hunt, Brian P. V.</searchLink><relatesTo>1,2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Carlotti%2C+François%22">Carlotti, François</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Donoso%2C+Katty%22">Donoso, Katty</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Pagano%2C+Marc%22">Pagano, Marc</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22D'Ortenzio%2C+Fabrizio%22">D'Ortenzio, Fabrizio</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Taillandier%2C+Vincent%22">Taillandier, Vincent</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Conan%2C+Pascal%22">Conan, Pascal</searchLink><relatesTo>5</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Oceans%22">Journal of Geophysical Research. Oceans</searchLink>. Aug2017, Vol. 122 Issue 8, p6309-6324. 16p. – Name: Abstract Label: Abstract Group: Ab Data: Knowledge of the relative contributions of phytoplankton size classes to zooplankton biomass is necessary to understand food-web functioning and response to climate change. During the Deep Water formation Experiment (DEWEX), conducted in the north-west Mediterranean Sea in winter (February) and spring (April) of 2013, we investigated phytoplankton-zooplankton trophic links in contrasting oligotrophic and eutrophic conditions. Size fractionated particulate matter (pico-POM, nano-POM, and micro-POM) and zooplankton (64 to >4000 μm) composition and carbon and nitrogen stable isotope ratios were measured inside and outside the nutrient-rich deep convection zone in the central Liguro-Provencal basin. In winter, phytoplankton biomass was low (0.28 mg m−3) and evenly spread among picophytoplankton, nanophytoplankton, and microphytoplankton. Using an isotope mixing model, we estimated average contributions to zooplankton biomass by pico-POM, nano-POM, and micro-POM of 28, 59, and 15%, respectively. In spring, the nutrient poor region outside the convection zone had low phytoplankton biomass (0.58 mg m−3) and was dominated by pico/nanophytoplankton. Estimated average contributions to zooplankton biomass by pico-POM, nano-POM, and micro-POM were 64, 28 and 10%, respectively, although the model did not differentiate well between pico-POM and nano-POM in this region. In the deep convection zone, spring phytoplankton biomass was high (1.34 mg m−3) and dominated by micro/nano phytoplankton. Estimated average contributions to zooplankton biomass by pico-POM, nano-POM, and micro-POM were 42, 42, and 20%, respectively, indicating that a large part of the microphytoplankton biomass may have remained ungrazed. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geophysical Research. Oceans 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: 10.1002/2016JC012658 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 6309 Titles: – TitleFull: Trophic pathways of phytoplankton size classes through the zooplankton food web over the spring transition period in the north-west Mediterranean Sea. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Hunt, Brian P. V. – PersonEntity: Name: NameFull: Carlotti, François – PersonEntity: Name: NameFull: Donoso, Katty – PersonEntity: Name: NameFull: Pagano, Marc – PersonEntity: Name: NameFull: D'Ortenzio, Fabrizio – PersonEntity: Name: NameFull: Taillandier, Vincent – PersonEntity: Name: NameFull: Conan, Pascal IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 21699275 Numbering: – Type: volume Value: 122 – Type: issue Value: 8 Titles: – TitleFull: Journal of Geophysical Research. Oceans Type: main |
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