Changes and opportunities for integrated management of the Razim-Sinoe Lagoon System |
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| Authors: | A Vadineanu S Cristofor Gh Ignat G Romanca C Ciubuc C Florescu |
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| Institution: | (1) Department of Ecology and Environmental Management, Bucharest University, Spl. Independentei, 91-95 76201 Bucharest, Romania |
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| Abstract: | The aim of this paper is to identify the general trend of changes and the basic requirements of the most important lagoon
system of the Black Sea, on the basis of critical analysis of existing data. A more coherent set of data sampled after 1988
on the basis of some intensive and extensive study and research programmes, including the main trophic parameters and the
most representative structural and functional features of this complex of ecotonal lakes, is comparatively analysed together
with more fragmentary data previously existing. The structural and functional changes within this complex of lakes were analysed
based on 31 most representative variables belonging to the main abiotic and biological compartments of the two main lakes,
Razim and Sinoe: dissolved organic carbon, dissolved oxygen, trophic state index TSI, nutrient content and ratio, salinity,
chlorophyll, phytoplankton, zooplankton, submerged macrophytes, zoobenthos, fish and birds. Two stages were distinguised in
the main structural changes, including morphometric connections with the Danube River and the Black Sea and hydrochemistry
and its effects on communities. These transitions were associated with two main driving forces, water desalinisation and rapid
eutrophication, and with other two kinds of man-induced changes, local hydrotechnical buildings and long-distance variables
operating over the entire Danube River watershed. The information support system for sustainable management of the Razim-Sinoe
Lagoon Complex as a part of the Danube Delta Biosphere Reserve, integrating existing data from research programmes and an
integrated monitoring system for new data is a final conclusion on further needs. |
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| Keywords: | biodiversity Black Sea Danube Delta Danube River ecological value nutrients salinity gradient |
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