The Eastern Mediterranean as a Laboratory Basin for the Assessment of Contrasting Ecosystems
Paola Malanotte-Rizzoli, Valery N. Eremeev
Springer Science & Business Media, Feb 28, 1999 - Science - 521 pages
This book is the outcome of a NATO Advanced Research Workshop on "The Eastern Mediterranean as a laboratory basin for the assessment of contrasting ecosystems" that was held in Kiev, Ukraine, March 23-27, 1998. The scientific rationale of the workshop can be summarized as follows. The Eastern Mediterranean is the most nutrient impoverished and oligotrophic large water body known. There is a well-defined eastward trend in nutrient ratios over the entire Mediterranean that starts at the Gibraltar Straits and, through the western basin, proceeds to the Ionian and Levantine Seas. Supply of nutrients to the entire Mediterranean is limited by inputs from the North Atlantic and various river systems along the sea. The unique feature of the Mediterranean is the presence of an eastward longitudinal trend in available nitrate/phosphate ratios. This apparently induces a west-to-east variation in the structure of the pelagic food web and trophic interactions. In this context the Mediterranean, and in particular its Eastern basin, provides probably a unique platform to explore the hypotheses related to the suggested phosphate-limitation on production and to the shift between "microbial" and "classical" modes of operation of the photic food web. The major exception of the overall oligotrophic nature of the Eastern Mediterranean is the highly eutrophic system of the Northern Adriatic Sea. Here, during the last two decades the discharges of the northern rivers (especially of the Po), together with municipal sewage, have led to a very marked increase of nutrients and subsequent imponent eutrophication events.
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abundance Academy of Sciences Adriatic Sea Aegean Sea algae algal anticyclonic anticyclonic eddy Assessment of Contrasting biological biomass Black Sea bottom carbon characteristics chlorophyll circulation coastal coefficient Contrasting Ecosystems convection copepods Cretan Arc cruises deep water Deep-Sea density depth DISTANCE km dynamics Eastern Mediterranean Sea euphotic zone Figure flux gyre Hydrophysical inflow Institute Intermediate Water Ionian Sea Kluwer Academic Publishers Laboratory Basin Levantine Basin Levantine Sea Malanotte-Rizzoli Marine maximum measurements Mediterranean Sea nitrate northern nutricline nutrients NW Levantine observed ocean oceanographic oligotrophic Otranto oxygen Ozsoy parameters phytoplankton plankton primary production profiles ratio region Research Rhodes cyclonic Rhodes gyre samples sea surface seasonal SeaWiFS sediments Sevastopol shelf South Adriatic southern Adriatic spatial species stations Strait structure studies summer surface waters Table thermocline transect Ukraine upper layer upwelling values variability vertical CHL vertical distribution water column water formation water mass western winter zooplankton