Phytoplankton and zooplankton production in the Bonney Coast upwelling, Australia: A coupled physical-biological model investigation

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research Pub Date : 2025-02-01 DOI:10.1016/j.csr.2024.105373

Jochen Kämpf

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Abstract

The Bonney Coast Upwelling is a prominent seasonal coastal upwelling region that develops during November–April on Australia's southeastern continental shelf. This study couples a three-dimensional hydrodynamic model with a nitrogen-phytoplankton-zooplankton-detritus (NPZD) model to explore the plankton dynamics during the upwelling season. Findings suggest that, while the physical response to upwelling-favorable winds occurs rapidly on a timescale of 5–10 days, phytoplankton blooms develop only slowly on time scales of ∼30–60 days. To this end, the region of high zooplankton levels is predicted to form slowly on timescales of 2–3 months. As expected, the zooplankton maximum develops downstream from the upwelling center in the shallow waters of an adjacent bay (i.e., Long Bay) over an alongshore distance of 200–300 km. Unexpectedly, high zooplankton levels also develop on the inner shelf adjacent to the upwelling plume on spatial scales of 20–30 km, mainly due to the onshore transport of phytoplankton via lateral turbulent diffusion. Overall, remineralization by detritus contributes significantly (>50%) as nitrogen source to the photosynthetic phytoplankton production on the continental shelf.

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来源期刊

Continental Shelf Research 地学-海洋学

CiteScore

4.30

自引率

4.30%

发文量

136

审稿时长

6.1 months

期刊介绍： Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.