{"refrec":{"BRefID":409420,"RR":"<b>Bisinicu, E.; Harcota, G.E.</b> (2025). Baseline assessment of black sea food web integrity using a zooplankton-based approach under the Marine Strategy Framework Directive. <i>J. Mar. Sci. Eng. 13(4)</i>: 713. <a href=\"https://dx.doi.org/10.3390/jmse13040713\" target=\"_blank\">https://dx.doi.org/10.3390/jmse13040713</a>","BEntID":407225,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>J. Mar. Sci. Eng. 13(4)</i>: 713. <a href=\"https://dx.doi.org/10.3390/jmse13040713\" target=\"_blank\">https://dx.doi.org/10.3390/jmse13040713</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Bisinicu, E.; Harcota, G.E.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Bisinicu, E.; Harcota, G.E.","Englishabstract":"This study presents the first scientific evaluation of food web integrity in the Black Sea under the Marine Strategy Framework Directive (MSFD) Descriptor 4 (Food Webs), utilizing zooplankton indicators to assess the environmental status during the warm season (May to October) from 2018 to 2023. The research aims to analyze trophic interactions, biodiversity patterns, and ecological stability by examining three key indicators: the Shannon–Wiener diversity index, Copepoda biomass, and Mnemiopsis leidyi biomass. The findings reveal that the Shannon–Wiener diversity index failed to achieve Good Environmental Status (GES) in any of the four Marine Reporting Units (MRUs), suggesting insufficient community diversity and potential ecological imbalances. Copepoda biomass met GES criteria only in marine and offshore waters, indicating spatial variability in copepod population stability across the Black Sea. Meanwhile, M. leidyi biomass remained within GES thresholds in all MRUs, suggesting that its population levels do not currently threaten the food web, despite its known invasive impact. This study provides critical baseline data on food web structure and dynamics in the Black Sea, offering a scientifically grounded framework for future ecological monitoring and management strategies. 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