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Tracking the Spatio-Temporal Distribution of Organic Particlesto Predict Macroaggregation in the Northern Adriatic Sea

Kraus, Romina; Ivošević DeNardis, Nadica (2023) Tracking the Spatio-Temporal Distribution of Organic Particlesto Predict Macroaggregation in the Northern Adriatic Sea. Water, 15 (9). ISSN 2073-4441

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In the last two decades, the phenomenon of macroaggregation has become more frequent in the Mediterranean Sea and beyond, but it has disappeared in the northern Adriatic. The aim of this study was to present, for the first time, the concentration of surface-active particles (SAP) at selected sampling stations in the northern Adriatic Sea, as well as phytoplankton and chlorophyll data and physical properties of seawater, in order to investigate the role of SAP in macroaggregation. We used an electrochemical method (polarography and amperometry) to directly and throughput characterize fragile organic material in terms of its dissolved and particulate state in seawater samples. The results show that the concentration of SAP is subject to seasonal variations and was generally higher in the western region. In addition, an increase in surfactant activity and concentration of SAP was detected in the subsurface layer and in the stratified column prior to the mucilage event, which may be related to the very high abundance of Skeletonema marinoi, a diatom characteristic of the winter bloom in the region. We noted an order of magnitude higher concentration of SAP than typically observed in late winter/early spring, which serves as a precursor to the macroaggregation that occurs under certain environmental and oceanographic conditions in marine systems.

Item Type: Article
Uncontrolled Keywords: Adriatic Sea ; adhesion ; adsorption ; chronoamperometry ; diatoms ; macroaggregation ; organic matter ; Skeletonema marinoi ; surface-active particles
NATURAL SCIENCES > Interdisciplinary Natural Sciences
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Environmental Science
Divisions: Center for Marine Research
Division for Marine and Enviromental Research
Project titleProject leaderProject codeProject type
Površinske sile na atomskoj skali u istraživanju mora i nanotehnologijiVesna Svetličić098-0982934-2744Research
Mehanizam dugoročnih promjena kruženja organske tvari u ekosustavu sjevernog Jadrana-Danilo Degobbis00981303MZO
Od površinskih svojstava stanica alga do pokazatelja stresa u vodenim ekosustavimaNadica Ivošević DeNardisIP-2018-01-5840Research
Depositing User: Nadica Ivošević DeNardis
Date Deposited: 27 Sep 2023 13:23
DOI: 10.3390/w15091665

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