Trophic controls in the Black Sea ecosystem (BLACK MODE)

The study proposed here aims to understanding the functioning of the Black Sea ecosystem in terms of the "trophic cascade" control and "regime shift" mechanisms using retrospective data analysis and interdisciplinary modelling approach. The main focus of the proposal is on understanding the long-term ecological changes within the pelagic interior Black Sea ecosystem during its transformation from the pre-eutrophication phase of the 1960s to the post-eutrophication phase of the 1990s. It is devoted to model the structural changes took place in the Black Sea ecosystem under concurrent effects of climatic changes, anthropogenic nutrient enrichment, temporal outburst of gelatinous species, overexploitation of small pelagic stocks in terms of the identification of regime shifts, alternative states, and trophic controls. The second objective is to elaborate individual role of each forcing mechanism on the structural changes of the Black Sea ecosystems, and predict its possible future states under some specific scenarios. The proposed study integrates various aspects of physical oceanography, climate-change research, ocean biogeochemistry, fisheries oceanography, and therefore represents a truly multi-disciplinary research approach based on the analysis of avail able data and simulations.


Environmental variability in aquatic ecosystems: Avenues for future multifactorial experiments
Gerhard, Miriam; Koussoroplis, Apostolos-Manuel; Raatz, Michael; Pansch, Christian; Fey, Samuel B.; Vajedsamiei, Jahangir; Caldero-Pascual, Maria; Cunillera-Montcusi, David; Juvigny-Khenafou, Noel P. D.; Polazzo, Francesco; Thomas, Patrick K.; Symons, Celia C.; Beklioğlu, Meryem; Berger, Stella A.; Chefaoui, Rosa M.; Ger, Kemal Ali; Langenheder, Silke; Nejstgaard, Jens C.; Ptacnik, Robert; Striebel, Maren (2022-10-01)
The relevance of considering environmental variability for understanding and predicting biological responses to environmental changes has resulted in a recent surge in variability-focused ecological research. However, integration of findings that emerge across studies and identification of remaining knowledge gaps in aquatic ecosystems remain critical. Here, we address these aspects by: (1) summarizing relevant terms of variability research including the components (characteristics) of variability and key i...
Human interventions on wetlands and their long term impacts on human well-being a study of Kızılırmak Delta case, Samsun, Turkey
Gürçay, Melih; Eraydın, Ayda; Department of City and Regional Planning (2009)
Acknowledging the necessity of a detailed understanding of the dynamics and contributions of wetlands in decision making processes, this research aims to identify the trade-offs between human interventions and human well-being in wetlands. Being one of the thirteen Ramsar Sites of Turkey and providing various ecosystem functions, Kızılırmak Delta was determined as the case study area of the research. Following the literature review on wetlands and their valuation, an assessment framework was developed for a...
Environmental applications of hyperspectral anomaly and target detection algorithms
Soydan, Hilal; Karpuz, Celal; Department of Mining Engineering (2017)
The objective of this thesis study is to understand the capacity of hyperspectral anomaly detection and target detection algorithms for contamination mapping, with a focus on developing a new methodology for environmental problems related to coal mining operations. Considering the data availability, specific chemical structure and reflectance properties as well as being one of the common contaminants in mining operations, hydrocarbon induced problems are studied for water and soil medium separately. Having ...
Pelagic functional group modeling: Progress, challenges and prospects
Hood, Raleigh R.; Laws, Edward A.; Armstrong, Robert A.; Bates, Nicholas R.; Brown, Christopher W.; Carlson, Craig A.; Chai, Fei; Doney, Scott C.; Falkowski, Paul G.; Feely, Richard A.; Friedrichs, Marjorie A. M.; Landry, Michael R.; Moore, J. Keith; Nelson, David M.; Richardson, Tammi L.; Salihoğlu, Barış; Schartau, Markus; Toole, Dierdre A.; Wiggert, Jerry D. (2006-01-01)
In this paper, we review the state of the art and major challenges in current efforts to incorporate biogeochemical functional groups into models that can be applied on basin-wide and global scales, with an emphasis on models that might ultimately be used to predict how biogeochernical cycles in the ocean will respond to global warming. We define the term "biogeochemical functional group" to refer to groups of organisms that mediate specific chemical reactions in the ocean. Thus, according to this definitio...
Marine Ecosystem Evolution in a Changing Environment (MEECE)
Salihoğlu, Barış(2013-2-28)
MEECE is a scientific research project which aims to use a combination of data synthesis, numerical simulation and targeted experimentation to further our knowledge of how marine ecosystems will respond to combinations of multiple climate change and anthropogenic drivers. With an emphasis on the European Marine Strategy (EMS), MEECE will improve the decision support tools to provide a structured link between management questions and the knowledge base that can help to address those questions. A strong knowl...
Citation Formats
B. A. Fach Salihoğlu, “Trophic controls in the Black Sea ecosystem (BLACK MODE),” 2008. Accessed: 00, 2020. [Online]. Available: