Control mechanisms on the ctenophore Mnemiopsis population dynamics: A modeling study

A comprehensive understanding of the mechanisms that control the ctenophore Mnemiopsis blooms in the Black Sea is gained with a zero-dimensional population based model. The stage resolving model considers detailed mass and population growth dynamics of four stages of model-ctenophore. These stages include the different growth characteristics of egg, juvenile, transitional and adult stages. The dietary patterns of the different stages follow the observations given in the literature. The model is able to represent consistent development patterns, while reflecting the physiological complexity of a population of Mnemiopsis species. The model is used to analyze the influence of temperature and food variability on Mnemiopsis reproduction and outburst. Model results imply a strong temperature control on all stages of Mnemiopsis and that high growth rates at high temperatures can only be reached if food sources are not limited (i.e. 25 mg C m(-3) and 90 mg C m(-3) mesozooplankton and microplankton, respectively). A decrease of 5 degrees C can result in considerable decrease in biomass of all stages, whereas at a temperature of 25 degrees C a 40% decrease in food concentrations could result in termination of transfer between stages. Model results demonstrate the strong role of mesozooplankton in controlling the adult ctenophore biomass capable of reproduction and that different nutritional requirements of each stage can be critical for population growth. The high overall population growth rates may occur only when growth conditions are favorable for both larval and lobate stages. Current model allows the flexibility to assess the effect of changing temperature and food conditions on different ctenophore stages. Without including this structure in end-to-end models it is not possible to analyze the influence of ctenophores on different trophic levels of the ecosystem.


Zooplankton of the Black Sea and the Eastern Mediterranean Similarities and dissimilarities
Kovalev, Av; Mazzocchı, Mg; Sıokoufrangou, I.; Kıdeyş, Ahmet Erkan (2001-01-01)
A synthesis of data on abundance and biomass of zooplankton in the Eastern Mediterranean (EMED) and the Black Sea shows major differences in the composition and structure of pelagic communities in the two basins. Few Mediterranean planktonic animals have invaded in the Black Sea. The great bulk of Black Sea species is represented by coastal inhabitants that spread throughout the whole basin. This process has been called “neritization” of the Black Sea fauna. Peculiarities in zooplankton assemblages of the B...
What is the Impact of Lessepsian Species on Eastern Mediterranean Fisheries?
Lefkaditou, Evgenia; Abdelaty, Mohamed; Bariche, Michel; Corsini-Foka, Mariolina; Dimech, Mark; Economidis, Panagiotis; Gücü, Ali Cemal; Kalogirou, Stefanos; Konnaris, Kostas; Lahouf, Imad; Madi, Abdalnaser; Majdalani, Samir; Mahmoud, Hatem Hanafy; Michailidis, Nikolas; El Mokdad, Dahej; Nader, Manal; Qamheyih, Mohamed; Orsi-Relini, Lidia; Pagiatas, Giorgos; (2011-10-29)
The migration of Lessepsian species, which was the result of the opening of the Suez Canal in 1869 and further facilitated by human activities and environmental conditions, seems to play a key role for fisheries particularly in the Levant basin. However, there is still lack of accurate data for most of the Lessepsian species in order to evaluate their positive or negative effect to the fisheries catches and local fish stocks. The Project "Scientific and Institutional Cooperation to Support Responsible Fishe...
Oceanography of the Black Sea: a review of some recent results
Ozsoy, E; Unluata, U (1997-11-01)
A new synthesis of the Black Sea oceanography is presented, primarily based on studies carried out in the southern Black Sea, as well as on some recent work covering the entire basin, obtained in a new era of increasing cooperation between the riparian countries. A review of the physical environment is given. Seasonal and interannual climatic variability of the system are discussed in relation to its hydrology. Water mass variability and formation are studied, with emphasis on the inflow of Mediterranean wa...
Vertical distribution of marine cyanobacteria Synechococcus spp. in the Black, Marmara, Aegean, and eastern Mediterranean seas
Uysal, Zahit (2006-01-01)
The vertical distributions of the unicellular cyanobacteria Synechococcus were studied in several highly contrasting seas: the Black Sea, Sea of Marmara, Aegean Sea, and Mediterranean Sea. Cell abundances varied significantly on both vertical and horizontal scales in all physically and spatially discrete water masses. Epifluorescence microscope cell counts from all seas clearly showed that majority of the population remains suspended in the surface-mixed layer and decreases gradually towards the base of the...
Seasonal Changes in the Composition and Abundance ofZooplankton in the Seas of the Mediterranean Basin
Kovalev, Av; Mazzocchı, Mg; Toklu Alıçlı, Benin; Skryabın, Va; Kıdeyş, Ahmet Erkan (2003-01-01)
Seasonal changes in the composition, abundance and biomass of zooplankton in the seas of the Mediterranean basin (the Mediterranean, Black and Azov seas) have been reviewed using our own data and data from the literature. In the deep-water central regions of the seas, the seasonal cycle of zooplankton abundance is characterised by one maximum occurring in spring or summer. In the coastal regions, two to three peaks (spring, summer and autumn) exist for the zooplankton abundance. The amplitude of seasonal fl...
Citation Formats
B. Salihoğlu and B. A. Fach Salihoğlu, “Control mechanisms on the ctenophore Mnemiopsis population dynamics: A modeling study,” JOURNAL OF MARINE SYSTEMS, pp. 55–65, 2011, Accessed: 00, 2020. [Online]. Available: