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Impact of circulation on high phytoplankton blooms and fish catch in the northern Adriatic (1990-2004)

Kraus, Romina; Supić, Nastjenjka (2011) Impact of circulation on high phytoplankton blooms and fish catch in the northern Adriatic (1990-2004). Estuarine, Coastal and Shelf Science, 91 (2). pp. 198-210. ISSN 0272-7714

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We analyzed oceanographic, hydrologic and atmospheric conditions in the northern Adriatic (section between the Po River delta and Rovinj) from 1990 to 2004 in which extreme phytoplankton blooms appeared. The largest blooms occurred in February, March, July and October, and were higher in surface layers and in the western, more eutrophic part of the region. They often appeared when the Istrian Coastal Countercurrent (ICCC ; strong southward current indicating a "closure" of the northern Adriatic circulation system) was pronounced. They seem to be related to the intensities of surface fluxes and Po River discharge rates. The blooms can float over the northern Adriatic for a long period (up to 30 days ; typical for March) and can appear simultaneously in separate circulation systems with a different species distribution. Finally, we present a hypothesis based on comparisons of geostrophic currents and fish stock that specific February northern Adriatic oceanographic conditions play the key role in the Adriatic anchovy stock.

Item Type: Article
Uncontrolled Keywords: phytoplankton ; geostrophic flow ; northern Adriatic ; anchovy catch
Subjects: NATURAL SCIENCES > Geology
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions: Center for Marine Research
Project titleProject leaderProject codeProject type
Matematičko modeliranje cirkulacije i satelitska detekcija graničnih procesa-Milivoj Kuzmić098-0982705-2707MZOS
Mehanizam dugoročnih promjena u ekosustavu sjevernog Jadrana-Robert Precali098-0982705-2731MZOS
Depositing User: Romina Kraus
Date Deposited: 02 Jul 2019 07:45
DOI: 10.1016/j.ecss.2010.10.021

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