A study of the seasonal and interannual variability of phytoplankton and zooplankton assemblages in a significant marine ecosystem

Kämpf, Jochen; Newman, Michelle; Doubell, Mark; Möller, Luciana; Baring, Ryan; Shute, Alex; Rodriguez, Ana

doi:10.1016/j.oceano.2022.12.003

Artykuł - szczegóły

Tytuł artykułu

A study of the seasonal and interannual variability of phytoplankton and zooplankton assemblages in a significant marine ecosystem

Autorzy

Kämpf Jochen , Newman Michelle , Doubell Mark , Möller Luciana , Baring Ryan , Shute Alex , Rodriguez Ana

Wybrane pełne teksty z tego czasopisma

Identyfikatory

DOI

10.1016/j.oceano.2022.12.003

Warianty tytułu

Języki publikacji

Abstrakty

The eastern Great Australian Bight (GAB) is a significant marine ecosystem, featuring a range of marine mammals and large pelagic fish including blue whales, sharks and tuna. Previous research has classified the region as generally oligotrophic, apart from late austral summer months when seasonal upwelling triggers phytoplankton blooms in the region. Based on multi-year field observations, this study analysed the interannual and interdecadal variability of the plankton community structure in this region. Pigment data indicate that nano- and pico-phytoplankton generally dominated the phytoplankton community structure with averages of 39% and 30% of the total biomass, including a relatively large proportion of nanophytoplankton (cryptophytes, haptophytes and prasinophytes) with cell sizes <5 µm, not resolved in microscopic cell counts. Nano- and pico-phytoplankton alone contributed ∼0.3 mg/m3 to the chlorophyll-a signal and therefore sustained an overall mesotrophic environment year-round. Distinct diatom blooms developed during the upwelling season within concentrated subsurface layers where chlorophyll-a concentrations increased to >1 mg/m3, characterising eutrophic conditions. The biomass of diatoms increased from <10% to ∼30% of total biomass. Diatom blooms coincided with relatively high abundances of three dominant zooplankton species (Oithona similis, Penilia avirostris and Microsetella norvegica) and/or the dinophyta Noctiluca scintillans, but events of high zooplankton abundance also occurred outside the upwelling season. The observational findings also show the occurrence of significant subsurface phytoplankton blooms in late spring, not reported before, that may also contribute to the ecosystem functioning of the region.

Słowa kluczowe

marine ecosystem plankton research marine productivity

Wydawca

Polish Academy of Sciences, Institute of Oceanology
Elsevier

Czasopismo

Oceanologia

Rocznik

2023

Tom

Vol. 65 (2)

Strony

434--451

Opis fizyczny

Bibliogr. 81 poz., map., rys., tab., wykr.

Twórcy

autor

Kämpf Jochen

jochen.kaempf@flinders.edu.au

Flinders University, College of Science & Engineering, Bedford Park, Australia

https://orcid.org/0000-0002-2811-7257

autor

Newman Michelle

Flinders University, College of Science & Engineering, Bedford Park, Australia

https://orcid.org/0000-0002-3632-6964

autor

Doubell Mark

South Australian Research and Development Institute (SARDI), West Beach, Australia

https://orcid.org/0000-0003-3272-9659

autor

Möller Luciana

Flinders University, College of Science & Engineering, Bedford Park, Australia

autor

Baring Ryan

Flinders University, College of Science & Engineering, Bedford Park, Australia

autor

Shute Alex

Flinders University, College of Science & Engineering, Bedford Park, Australia

autor

Rodriguez Ana

South Australian Research and Development Institute (SARDI), West Beach, Australia

Bibliografia

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Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023). (PL)

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Bibliografia

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