scholarly journals Sensitivity of the N. AEGEAN SEA ecosystem to Black Sea Water inputs

2014 ◽  
Vol 15 (4) ◽  
pp. 790 ◽  
Author(s):  
G. PETIHAKIS ◽  
K. TSIARAS ◽  
G. TRIANTAFYLLOU ◽  
S. KALARONI ◽  
A. POLLANI
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Black Sea ◽  
Sea Water ◽  
Aegean Sea ◽  
Microbial Loop ◽  
Inorganic Nutrients ◽  
The North ◽  
North Aegean Sea ◽  
The Impact

The effect of Black Sea Water (BSW) inputs on the North Aegean Sea productivity and food web dynamics was investigated, by means of sensitivity simulations, investigating the effect of the inflowing BSW, in terms of inorganic nutrients and dissolved organic matter. The model used has been successfully applied in the area in the past and extensively presented. Considering the importance of the microbial loop in the ecosystem functioning, the role of the dissolved organics and in order to achieve a more realistic representation of the Dissolved Organic Matter pool, the bacteria sub-model was appropriately revised. The importance of the microbial loop is highlighted by the carbon fluxes where almost 50% of carbon is channelled within it. The impact of dissolved organic matter (DOM) (in the inflowing to the Aegean Sea, BSW) appears to be stronger than the impact of dissolved inorganic nutrients, showing a more extended effect over the N Aegean. Bacterial production and biomass is more strongly affected in the simulations by modified DOM, unlike phytoplankton biomass and production, which are more dependent on the inflowing nutrients and particularly phosphorus (inorganic and dissolved organic). In the phytoplankton composition, the dinoflagellates appear to be mostly affected, being favoured by higher nutrient availability at the expense of all other groups, particularly picoplankton, indicating a shift to a more classical food chain.

Modelling the impact of Black Sea water inflow on the North Aegean Sea hydrodynamics

2010 ◽  
Vol 60 (3) ◽  
pp. 585-596 ◽  
Author(s):  
Margarita Tzali ◽  
Sarantis Sofianos ◽  
Anneta Mantziafou ◽  
Nikolaos Skliris
Keyword(s):  
Black Sea ◽  
Sea Water ◽  
Aegean Sea ◽  
Water Inflow ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea ◽  
The Impact

scholarly journals Coccolithophore assemblage response to Black Sea Water inflow into the North Aegean Sea (NE Mediterranean)

2017 ◽  
Vol 149 ◽  
pp. 138-150 ◽  
Author(s):  
B.-Th. Karatsolis ◽  
M.V. Triantaphyllou ◽  
M.D. Dimiza ◽  
E. Malinverno ◽  
A. Lagaria ◽  
...  
Keyword(s):  
Black Sea ◽  
Sea Water ◽  
Aegean Sea ◽  
Water Inflow ◽  
The North ◽  
North Aegean ◽  
Ne Mediterranean ◽  
North Aegean Sea

scholarly journals Modeling the buoyancy-driven Black Sea Water outflow into the North Aegean Sea

Oceanologia ◽  
2016 ◽  
Vol 58 (2) ◽  
pp. 103-116 ◽  
Author(s):  
Nikolaos Kokkos ◽  
Georgios Sylaios
Keyword(s):  
Black Sea ◽  
Sea Water ◽  
Aegean Sea ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea ◽  
Water Outflow

SeaWiFs satellite data analysis of Black Sea water discharge pattern into the Aegean Sea

2002 ◽  
Vol 46 (8) ◽  
pp. 195-202 ◽  
Author(s):  
L. Jönsson
Keyword(s):  
Water Quality ◽  
Black Sea ◽  
Satellite Data ◽  
Sea Water ◽  
Water Discharge ◽  
Aegean Sea ◽  
The North ◽  
Noaa Avhrr ◽  
North Aegean ◽  
North Aegean Sea

Satellite data from the SeaWiFS sensor has been used to determine chlorophyll-a contents in the North Aegean Sea using SEADAS 3.3 software. The data is used to extract knowledge on water movements/flow phenomena using chlorophyll as a “tracer” but will also indicate water quality. More than 100 SeaWiFS scenes from 1998 up to 2001 have been analyzed in terms of hydrodynamic phenomena, mainly the transport and spreading pattern of Black Sea Water in the North Aegean Sea but also concerning the water quality and its seasonal and yearly variation at the mouth region of the Dardanelles. Some comparison with earlier studies using NOAA AVHRR thermal data and historical CZCS scenes is also made.

The influence of Black Sea Water inflow and its synoptic time-scale variability in the North Aegean Sea hydrodynamics

2016 ◽  
Vol 66 (2) ◽  
pp. 195-206 ◽  
Author(s):  
Apostolia-Maria Mavropoulou ◽  
Anneta Mantziafou ◽  
Ewa Jarosz ◽  
Sarantis Sofianos
Keyword(s):  
Black Sea ◽  
Time Scale ◽  
Sea Water ◽  
Aegean Sea ◽  
Water Inflow ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

Insights into the benthic communities response to the inflow of Black Sea mesotrophic waters in the North Aegean Sea

2017 ◽  
Vol 149 ◽  
pp. 162-173 ◽  
Author(s):  
Nikolaos Lampadariou ◽  
Katerina Sevastou ◽  
Dimitrios Podaras ◽  
Anastasios Tselepides
Keyword(s):  
Black Sea ◽  
Benthic Communities ◽  
Aegean Sea ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

Variability of mesozooplankton spatial distribution in the North Aegean Sea, as influenced by the Black Sea waters outflow

2009 ◽  
Vol 78 (4) ◽  
pp. 557-575 ◽  
Author(s):  
Ioanna Siokou-Frangou ◽  
Soultana Zervoudaki ◽  
Epaminondas D. Christou ◽  
Vassilis Zervakis ◽  
Dimitrios Georgopoulos
Keyword(s):  
Spatial Distribution ◽  
Black Sea ◽  
Aegean Sea ◽  
The Black Sea ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

scholarly journals Behaviour of dissolved organic matter and inorganic nutrients during experimental sea-ice formation

2001 ◽  
Vol 33 ◽  
pp. 317-321 ◽  
Author(s):  
Virginia Giannelli ◽  
David N. Thomas ◽  
Christian Haas ◽  
Gerhard Kattner ◽  
Hilary Kennedy ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Sea Ice ◽  
Organic Compounds ◽  
Sea Water ◽  
Ice Cores ◽  
Inorganic Nutrients ◽  
Ice Formation ◽  
Solid Matrix ◽  
Dissolved Organic Compounds

AbstractIt is well established that during sea-ice formation, crystals aggregate into a solid matrix, and dissolved sea-water constituents, including inorganic nutrients, are rejected from the ice matrix. However, the behaviour of dissolved organic matter (DOM) during ice formation and growth has not been studied to date. DOM is the primary energetic substrate for microbial heterotrophic activity in sea water and sea ice, and therefore it is at the base of the trophic fluxes within the microbial food web. The aim of our study was to compare the behaviour of DOM and inorganic nutrients during formation and growth of sea ice. Experiments were conducted in a large indoor ice-tank facility (Hamburg Ship Model Basin, Germany) at −15°C. Three 1 m3 tanks, to which synthetic sea water, nutrients and dissolved organic compounds (diatom-extracted DOM) had been added, were sampled over a period of 5 days during sea-ice formation. Samples were collected throughout the experiment from water underlying the ice, and at the end from the ice as well. Brine was obtained from the ice by centrifuging ice cores. Inorganic nutrients (nitrate and phosphate) were substantially enriched in brine in comparison to water and ice phases, consistent with the processes of ice formation and brine rejection. Dissolved organic carbon (DOC) was also enriched in brine but was more variable and enriched in comparison to a dilution line. No difference in bacteria numbers was observed between water, ice and brine. No bacteria growth was measured, and this therefore had no influence on the measurable DOC levels. We conclude that the incorporation of dissolved organic compounds in newly forming ice is conservative. However, since the proportions of DOC in the brine were partially higher than those of the inorganic nutrients, concentrating effects of DOC in brine might be different compared to salts.

scholarly journals INTER-annual/decadal variability of the north Aegean Sea hydrodynamics over 1960-2000

2014 ◽  
Vol 15 (4) ◽  
pp. 696 ◽  
Author(s):  
V. VERVATIS ◽  
N. SKLIRIS ◽  
S. S. SOFIANOS
Keyword(s):  
Decadal Variability ◽  
Sea Water ◽  
Salt Content ◽  
Aegean Sea ◽  
The Black Sea ◽  
Minor Role ◽  
Freshwater Flux ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

Results from a high-resolution hindcast model experiment, supported by available observations, reveal an increasing salinity trend in the north Aegean during the Eastern Mediterranean Transient (EMT), largely controlled by increases in the flow rate and salinity of water masses of Levantine origin entering the domain through the Myconos-Ikaria strait as a response to an acceleration of the Aegean thermohaline cell. Changes in the Dardanelles inflow (increasing salinity) and in the surface freshwater flux (increasing Evaporation-Precipitation), although both contribute to a higher salt content of the basin during the EMT, play a minor role in the inter-annual/decadal variability of the freshwater budget. A long-term decreasing temperature trend is observed from the 1960s to the early 1990s. It is superimposed on the salinity-preconditioning phase over the 1980s and early 1990s. Both signals are, concomitantly, favouring conditions for intense Dense Water Formation (DWF) in the north Aegean Sea. In addition, the northward displacement of the Black Sea Water front over the EMT, leads to the expansion of convective cells towards the north and to higher formation rates associated with both colder and saltier surface waters.

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