Find Academic Supervisors

• Hydrogeology
• Environmental Informatics
• Groundwater Systems
• +5 more

Dr. Thomas Kalbacher serves as Deputy Head of Department and Workgroup Leader of Hydroinformatics at the Department of Environmental Informatics, Helmholtz Centre for Environmental Research - UFZ in Leipzig, Germany. With extensive experience in environmental modeling and software development, he leads critical research initiatives focused on groundwater systems and environmental informatics. His research spans Earth Science - Hydrogeology and Computer Science - Simulator & Workflows, with particular emphasis on the development of OpenGeoSys (OGS) software and related analysis tools. Kalbacher's work addresses sustainable use and protection of natural groundwater systems, examining their quantitative and qualitative impact on surface waters. He investigates how digital twins and near real-world models can help tackle water management challenges in the face of climate change, with a focus on creating robust future projections to preserve landscape multifunctionality. Analysis of his recent publications reveals strong trends in hydrogeological modeling, spectral analysis of groundwater level fluctuations, and development of digital tools for environmental monitoring. His work increasingly focuses on large-scale modeling of groundwater systems, particularly in the Danube catchment area, while also advancing data infrastructure through projects like Digital Earth. A significant portion of his recent research examines methodological approaches to hydrologic modeling, particularly comparative assessments of Richards equation versus infiltration capacity approaches. As leader of the Hydroinformatics workgroup, Kalbacher plays a pivotal role in the OpenGeoSys open-source project, which has become a significant platform for computational hydrology and environmental modeling. His team develops software solutions for regional groundwater quantity modeling (LandTrans) in cooperation with the Research Software Engineering and Visualization group. The Hydroinformatics group under his leadership contributes to advancing environmental modeling capabilities through robust software development practices and integration of high-resolution observation data from modern monitoring stations and satellite observations.

Meghan BrownView profile

Professor

• Aquatic Ecology
• Invasion Biology
• Paleolimnology
• +7 more

Meghan Brown is a Professor of Biology and Chair of Aquatic Science at Hobart and William Smith Colleges (HWS), where she has been a faculty member since 2006. Her research focuses on aquatic ecology, invasion biology, and paleolimnology, with fieldwork spanning the Finger Lakes, Lake Superior, Lago Maggiore (Italy), and the Caribbean islands. She employs interdisciplinary methods including sediment core analysis, field observations, and modeling to study invasive species dynamics. Education: Ph.D., University of Minnesota M.S., University of Minnesota B.S., University of Michigan Her research interests center on understanding how non-native species establish in ecosystems and alter ecological processes, particularly in lakes and island communities. She investigates the impacts of invasive zooplankton such as the spiny waterflea, fishhook waterflea, and bloody red shrimp, focusing on their interactions with native species, dormancy strategies, and role in biomagnification of pollutants like mercury. Her work integrates ecological theory with real-world management applications, especially regarding prevention of species spread through boating and tourism. Her recent publications reveal a strong trend in studying invasive species' ecological impacts using both contemporary and historical data. She frequently employs paleolimnology to reconstruct long-term environmental changes and combines this with behavioral and physiological studies. Her work increasingly incorporates human dimensions, such as tourism-driven plant invasions in the Caribbean and community perspectives on water quality in Guatemala. Scientific Awards and Recognition: Fulbright Research Scholar Fulbright-Hays Group Study Abroad Program Co-Director Principal Investigator, National Science Foundation Major Research Instrumentation Program Recipient of grants from the Great Lakes Protection Fund and US Fish and Wildlife Service Co-Principal Investigator, New York Six Liberal Arts Consortium, Mellon Foundation Meghan Brown is a dedicated mentor, having supervised numerous undergraduate research projects in ecology and environmental studies. Her advising spans topics from leaf decomposition to eDNA detection of invasive species. She is actively involved in science communication and policy outreach, advocating for 'Clean, Drain, and Dry' practices to prevent species spread. She also contributes to interdisciplinary initiatives, including collaborations with fiction writers to create scientifically accurate ecological worlds, such as in Jeff VanderMeer’s novel Hummingbird Salamander . Laboratories and Research Teams: She leads a vibrant research lab at HWS involving undergraduate students and collaborators from multiple institutions. Her team uses field sampling, laboratory experiments, and data modeling to investigate ecological questions. She is part of the Finger Lakes Institute and collaborates with scientists across the US and internationally, including in Italy and Cuba.

Darren MundyView profile

Professor

• Educational Technology
• Social media
• eGovernment communications and web-based channel shift
• +9 more

Darren Mundy is Professor and Dean of the Faculty of Arts, Cultures and Education at the University of Hull, where he has been a faculty member since 2003. He has previously served as Head of School, Associate Principal, and Associate Dean, demonstrating sustained academic leadership. His work is centered in the Department of Screen within the Faculty of Arts, Cultures and Education. University: University of Hull School: Faculty of Arts, Cultures and Education Department: Screen Role: Dean and Professor Darren Mundy’s research focuses on the transformative role of technology in education and digital society. His early work explored engagement-enhancing technologies such as The Wild Thing and PAM-PAM, evolved into designing learning environments through the Euroversity project, and has matured into advancing critical digital literacies via the DETECT project. His interdisciplinary interests span educational technology, social media, eGovernment, information security, privacy, and eHealth. He has played a foundational role in establishing the Games Design program at Hull and has taught across web design, games art, and development for two decades. His recent publications reflect a strong trend in digital representation, technology acceptance models, and digital transformation, particularly in educational and governmental contexts. Articles such as 'An Analysis of Middle Eastern Female Athletes Visual Self-Presentation Strategies on Instagram' and 'Critical digital literacies at school level: A systematic review' highlight his focus on equity, representation, and critical engagement in digital spaces. His work often involves international collaboration and EU-funded initiatives. Darren has received recognition through multiple external examiner roles at institutions including the University of Bedfordshire, Coventry University, Ulster University, and the University of Bolton, underscoring his academic standing. He has led externally funded projects such as 'Who moved my block?' (AHRC) and 'DETECT' (European Commission), demonstrating his ability to secure research support. He has supervised over a dozen postgraduate students to completion, including eight PhDs and four MSc by Research students, and currently supervises a part-time PhD candidate exploring mixed reality applications for dementia care. His advisory work emphasizes real-world impact in technology-enabled learning and digital inclusion. Darren is also co-manager of the EU-funded Euroversity Network, promoting transnational educational collaboration. His leadership extends beyond research and teaching into institutional development and international academic service, making him a key figure in shaping digital education policy and practice.

• Data Stream Management
• Real-time Data Analytics
• Data Quality
• +7 more

Sandra Geisler is a Junior Professor for Data Stream Management and Analysis at the Department of Computer Science, RWTH Aachen University, a position she has held since September 2021. She is also the leader of the Digital Health Spaces group at the Fraunhofer Institute for Applied Information Technology (FIT) in St. Augustin, reflecting her dual expertise in academic research and applied digital health solutions. Bachelor/Master: Diploma in Computer Science, RWTH Aachen University (2008) PhD: Doctoral degree in Computer Science, RWTH Aachen University (2016) Her research focuses on data stream systems, real-time analytics, data quality, and their applications in digital health and industrial processes. She has made significant contributions to ontology-based data quality management, edge computing for stream processing, and FAIR data principles. Recent work explores the integration of large language models into data management workflows and the development of privacy-preserving platforms for industrial data exchange. Her recent publications demonstrate a strong trend in distributed and edge-based stream processing, interdisciplinary applications in healthcare and supply chains, and the use of AI for data discoverability and quality. Topics include in-network computing, simulation of edge queries, self-tonometry for glaucoma, and cross-company data sharing with privacy awareness. She has served as Associate Editor for the Data & Knowledge Engineering Journal (Elsevier), Public Relation Chair for QDB Workshop (VLDB 2016), and Workshop Chair for IMMoA and HIMoA workshops. She has also edited a special issue on Information Management in Mobile Applications in the Pervasive and Mobile Computing Journal. Geisler has supervised multiple theses on topics including LLM-based ontology integration, edge anomaly detection, and data ecosystem modeling. She has been actively involved in research grants and projects related to industrial data processing, digital health, and sustainable production. She teaches courses such as Data Stream Management and Analysis and Data Ecosystems Lab. She leads the Digital Health Spaces research group at Fraunhofer FIT, focusing on innovative solutions for health data management and patient-centric digital tools. Her work bridges computer science, healthcare, and industrial applications, promoting secure, efficient, and intelligent data ecosystems.

• Agent-Based Modeling
• Social Simulation
• Computational Ethics
• +10 more

Nuno David is an Associate Professor at ISCTE - Instituto Universitário de Lisboa, affiliated with the Department of Information Science and Technology within the School of Technologies and Architecture. He is also an Integrated Researcher at DINÂMIA'CET-Iscte, focusing on socioeconomic change and territory. He serves as the Data Protection Officer at Iscte and chairs the Ethics Committee of the School of Technologies and Architecture, while also being a member of the university-wide Ethics Council. PhD in Computing, Faculty of Sciences, University of Lisbon (2005) Master's degree in Agent-Based Social Simulation, University of Lisbon Undergraduate degree in Electrical Engineering – Computer Science, University of Coimbra His research spans agent-based modeling , social simulation , computational ethics , privacy , and the philosophy of computer science , with a focus on the epistemology of computational social science. He investigates how computational methods influence social science theories and methodologies. His recent publications highlight a consistent focus on ethical dimensions of simulation, disaster response modeling (e.g., tsunami evacuation), and digital governance. Articles frequently appear in high-impact journals such as Journal of Artificial Societies and Social Simulation , AI & Society , and Geosciences , reflecting interdisciplinary engagement across computer science, social sciences, and ethics. Member, Ethics Committee, ISCTE (2020–2026) Data Protection Officer, ISCTE (since 2018) Coordinator, multiple ethics and cybersecurity courses in Master’s and Bachelor’s programs Nuno David leads and participates in significant research initiatives, including the Research Data Management Center for SSH (RDMC-SSH) and the Re.Data network , both focused on research data infrastructure. He is also involved in the EU-funded ManagiDiTH master’s program, aimed at digital transformation in healthcare. His work integrates academic research with practical policy and institutional governance, particularly in data protection and research ethics. He has contributed to multiple projects on e-government in developing contexts, especially in Mozambique, and has developed tools for analyzing academic collaboration networks. His teaching includes courses on simulation, programming, and professional ethics in computing.

• Human-Computer Interaction
• Digital Multimedia
• Computer Games
• +7 more

Pedro Faria Lopes is an Associate Professor at the Department of Information Science and Technology (ISTA), School of Technologies and Architecture, ISCTE – Instituto Universitário de Lisboa. He is also an Associate Researcher at ISTAR-Iscte, contributing to the Digital Living Spaces research group. His academic roles involve teaching and supervising students in digital multimedia, human-computer interaction, and game design. His educational background includes: PhD in Electrical and Computer Engineering, Higher Technical Institute - UTL (1996) Master's degree in Electrical and Computer Engineering, Higher Technical Institute - UTL (1989) Bachelor's degree in Electrical Engineering, Higher Technical Institute - UTL (1985) Pedro Faria Lopes's research interests focus on digital multimedia, human-computer interaction, computer games, sound and video for multimedia, computer animation, and digital content creation for lifelong and e-learning contexts. His work bridges technology and education, emphasizing interactive and engaging digital experiences. He has contributed extensively to the development of serious games, multimedia applications, and educational technologies. His recent publications highlight trends in educational video games, procedural content generation, interactive storytelling, and digital inclusion through mobile applications. These works reflect a strong commitment to applying computing technologies in educational, social, and cultural domains, particularly through game-based learning and accessible design. He has supervised numerous graduate students, with 15 completed and 3 ongoing Master’s dissertations, as well as 1 completed and 1 ongoing doctoral theses, primarily at ISCTE. His teaching activities include courses such as: Human-Computer Interaction Digital Game Design and Production Sound, Video and Digital Content Authoring Visualization and Human-Computer Interaction Multimedia Management Although no specific scientific awards are listed in the provided text, his sustained research output and academic leadership suggest recognition within his fields. His work in digital living spaces and educational technologies indicates active engagement in interdisciplinary research projects.

• Requirements Engineering
• Agile Software Development
• Security Requirements
• +3 more

Maya Daneva is a Professor at the University of Twente , Netherlands, specializing in Requirements Engineering , Agile Software Development , and Software Security . She has extensive contributions to empirical studies on quality requirements in distributed agile projects, security risk frameworks for cyber-physical systems, and crowdsourced requirements engineering. Key Research Areas: Agile quality requirements, security ontology modeling, DevOps architecture, user feedback analysis for mobile apps Recent Article Trends: Focus on domain modeling pain points, phishing attack ontologies, personality-driven security perceptions, and empirical validation of requirements checklists Leadership: Organizer of EmpiRE workshops, CreaRE workshops, and REFSQ doctoral symposia

Boyan Paskalev BontchevView profile

Professor

• Software Architecture
• E-Learning Systems
• Adaptive Hypermedia
• +5 more

Boyan Paskalev Bontchev is a Professor in the Department of Software Technologies at Sofia University's Faculty of Informatics. With a PhD in Computer Science from the Center of Informatics and Computer Technology - Bulgarian Academy of Sciences, he has established himself as a prominent academic in software engineering and educational technology fields. His academic career includes teaching Java Server/Side Programming and OOAD-UML courses at Sofia University and New Bulgarian University since 2000. Professor Bontchev's research focuses on e-learning systems, adaptive hypermedia, and software architecture. His work centers around developing self-adaptive educational platforms, with significant contributions to the ARCADE e-learning platform that complies with IEEE LTSA standards. He has published extensively on topics including courseware composition, learning content interoperability, and assessment frameworks, demonstrating a consistent research trajectory in educational technology systems. His publications reveal a strong emphasis on practical applications of educational technology, particularly in self-adaptive hypermedia navigation, e-learning courseware delivery, and assessment interoperability. The research shows progression from foundational work on software architecture to increasingly sophisticated adaptive learning systems that incorporate learner modeling and personalized educational experiences. Professor Bontchev maintains active industry connections, having worked as a software engineer and project manager at companies including Rila Solutions, ESDI Ltd., and OBLOG Software Ltd. His international experience includes research stays at the University of Vienna and Technical University of Aachen, contributing to his broad perspective on educational technology development. With proficiency in multiple programming languages and environments including Java, JSP, Oracle, and web technologies, he bridges theoretical computer science with practical educational applications. His multilingual capabilities (English, Portuguese, German, Russian, Spanish) further enhance his international research collaborations and academic contributions.

Marcel MachillView profile

Professor

• Journalism
• Media Studies
• International Media Systems
• +9 more

Professor Marcel Machill is a University Professor of Journalism with a focus on International Media Systems at the University of Leipzig, where he has been teaching since spring 2002. His expertise spans cross-media studies, international journalism, media policy, and digital media platforms including search engines and social networks. Education: Harvard University (John F. Kennedy School of Government) Centre de formation des journalistes (Paris) Doctorate summa cum laude from University of Dortmund (Chair of Media Policy and Media Economics) Diplom-Journalist with distinction Professor Machill's research focuses on cross-media with particular emphasis on electronic media including television, radio, and online magazines. He also works extensively in international journalism, media policy and systems, search engines, internet governance, media literacy, and journalistic cultures. His work examines how digital platforms like Facebook and Google are transforming public discourse and opinion formation, with particular attention to media quality assessment and information literacy in the digital age. His publications reveal a consistent focus on how traditional and new media intersect, with particular attention to evolving journalistic practices, representation in international media, and the impact of social media on public opinion. His research often addresses contemporary challenges in media systems and journalistic practices in the digital landscape. Professional Service: Expert for US Congress on internet filters (2000) Expert for North Rhine-Westphalia State Parliament on media violence (2002) Expert for European Commission on media and internet projects (2003) Expert for Norwegian Research Council, Humboldt Foundation, and European Science Foundation (2004) Professor Machill has directed numerous third-party funded research projects in collaboration with organizations including the National Ethics Council, North Rhine-Westphalia Media Authority, Franco-German Youth Office, and Asia-Europe Foundation. His research group has conducted studies on media truth aesthetics, sports journalism, broadcast language, and coverage of polarizing political topics across different media channels.

Malte TeichmannView profile

Researcher

• Vocational Education
• Continuing Education
• Industry 4.0
• +5 more

Dr. Malte Teichmann is a researcher at the University of Potsdam , affiliated with the Chair of Business Information Systems and the Weizenbaum Institute for the Networked Society . He leads research group 7 on Education and Further Education in the Digital Society , focusing on immersive technologies in vocational training, Industry 4.0 applications, and knowledge transfer in SMEs. Bachelor in Educational Sciences & Business Administration (2015, University of Potsdam) Master in Educational Sciences (2018, University of Potsdam) Doctorate in Knowledge Management (2021, University of Potsdam) His research explores: Immersive virtual learning environments (VR/AR/Metaverse) Design science methodology for educational frameworks Age-appropriate training systems for blue-collar workers Industry 4.0 implementation in SMEs Recent Research Trends Malte's publications since 2020 show increasing focus on: Metaverse applications in public administration Eye-tracking analysis of cognitive load in VR learning Process-oriented education design Corona-sensitive data collection methodologies Scientific Contributions As lead author and co-researcher, he has: Developed frameworks for VR learning environments Created design guidelines for Metaverse implementation Proposed SME-tailored AR/VR integration strategies Advanced subject-oriented learning methodologies Published 15+ works on digital transformation pedagogy Current Projects Actively involved in: Beer and Science (2025-2027): Brewing as pedagogical model ReWork:KMU (2022-2024): Remote work integration for SMEs Weizenbaum Institute (2018-present): Networked society research

• Software Engineering
• Workflow Management Systems
• Image Analysis
• +2 more

Michał Turek is a Professor at the Department of Applied Informatics within the Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering at AGH University of Science and Technology in Kraków, Poland. His primary workplace is located in room 303a of building C-2, and he maintains active contact through email (mitu@agh.edu.pl) and phone (+48 12 617 52 03), indicating current academic engagement. His research spans Software Engineering with particular emphasis on Workflow Management Systems integration with industrial applications, Image Analysis for 3D surface inspection, and Agile Methodologies implementation. Turek has pioneered innovations in Scrum adaptation for multi-project environments and software product lines, while developing formal verification frameworks for business processes and service-oriented architectures. His work bridges theoretical computer science with practical industrial solutions, especially in automated damage identification systems and workflow optimization. Analysis of his 15 most recent publications reveals consistent focus on workflow system intelligence (2020-2022), with significant contributions to automatic correction mechanisms and smart procedure integration. Earlier works (2010-2016) demonstrate deep expertise in formal verification methods, Scrum economics, and 3D surface analysis techniques. The publications show interdisciplinary convergence between software engineering, computer vision, and industrial automation, with recurring themes of system resilience and process optimization across both English and Polish scholarly outputs.

Marika Apostolova TrpkovskaView profile

Associate Professor

• Cybersecurity
• Blockchain Technology
• Industrial Internet of Things (IIoT)
• +4 more

Marika Apostolova Trpkovska is an Associate Professor at the Faculty of Contemporary Sciences and Technologies, South East European University (Tetovo, Macedonia). Her academic work spans cybersecurity, blockchain technology, and educational technology with a focus on Industrial IoT security, semantic web applications, and digital learning systems. PhD in Computer Science (Specialty: e-Medical Services based on Semantic Web) MSc in Software Development and Applications BSc in Computer Sciences Her research covers cybersecurity frameworks for Industrial IoT, blockchain applications in public administration, and educational technology innovations including VR/AR integration and gamification. She has published extensively in international conferences and journals on these topics, with recent works focusing on machine learning-enhanced security protocols and decentralized real estate management systems. Current publications (2023-2024) highlight her expertise in IIoT security standards, smart contract development using Ethereum/IPFS, and cybersecurity threat modeling. Earlier works examine e-learning systems implementation, gender disparities in CS research, and real-time operating system validation. She serves as part-time academic staff member while maintaining technical roles in learning management system administration (LIBRI, ANGEL) and teaching responsibilities across software engineering, algorithms, and programming disciplines.

André NitzeView profile

Professor

• Internet of Things
• Digital Business Models
• Software Engineering
• +9 more

Prof. Dr.-Ing. André Nitze is a faculty member at the Brandenburg University of Technology in the Department of Economics . His research focuses on Internet of Things (IoT) , Digital Business Models , Software Architectures , Cloud Computing , Mobile Computing , and Predictive Analytics . He leads research projects on municipal LoRaWAN infrastructure, rural on-demand transport systems, and user-centered digitalization for sustainable development. Area of Expertise: IoT Applications, Software Engineering, Digital Transformation Current Research: Sustainable Municipal LoRaWAN, Rural Mobility Solutions Projects: risKI - KatKomm (2024-2026): Protocol development for disaster communication InNoWest (2023-2027): Subproject leader for digital sustainability OSLO (2023): Rural on-demand transport software architecture Awards: Best Paper Award at ICDS 2024 for work on LoRaWAN infrastructure Education & Supervision: M.Sc. and B.Sc. in Business Informatics Supervised over 15 theses including topics on GIS analysis, sensor networks, and AI applications

• Business Management
• Corporate Governance
• Sustainability
• +4 more

Jose Manuel Hurtado González serves as an Associate Professor in the Department of Business Organization and Marketing at Universidad Pablo de Olavide, where he conducts research at the intersection of corporate governance, sustainability, and strategic management. His work examines organizational resilience through board dynamics, ownership structures, and innovation frameworks. He earned his Doctorate from Universidad Pablo de Olavide in 2006 with the thesis The adoption and impact of web technologies on firm performance: an institutional and resource based-view perspective , supervised by Dr. José Luis Galán González and Dr. Sebastián Bruque Cámara. Dr. Hurtado González specializes in meta-analytic methodologies to investigate critical business phenomena. His research portfolio spans corporate governance mechanisms , sustainability-driven organizational strategies , and ambidextrous innovation systems . Recent work demonstrates increasing focus on social capital perspectives in board resilience and SDG integration in higher education curricula, reflecting evolving scholarly priorities toward systemic sustainability. Analysis of his publication trajectory reveals dominant themes in governance-performance relationships (42% of recent works), innovation meta-analyses (28%), and sustainability applications (30%). His research consistently bridges theoretical frameworks with practical organizational implications, particularly regarding SME adaptation and board effectiveness in volatile environments. He actively contributes to the ESTRATESOSTENIB research group (Policies, Strategies and Governance of Organizations for Sustainability), having previously participated in DIRECOMP (Business Management for Competitiveness and Sustainability) and INFORMACIÓN, ENTORNO Y CAMBIO (Information, Environment and Organizational Change) groups.

Øyvind FiksenView profile

Professor

• Biological oceanography
• Marine ecology
• Marine ecosystems
• +7 more

Øyvind Fiksen is a Professor in the Department of Biological Sciences at the University of Bergen, specializing in biological oceanography and marine ecosystem dynamics. His work focuses on how individuals drive population and community dynamics in marine environments through mechanistic models, state-variable optimality theory, and trait-based ecosystem modeling. Professor Fiksen's research spans behavioral ecology, predator-prey interactions in fish, zooplankton, and microbes, investigating how these interactions structure marine ecosystems. His teaching portfolio includes Marine Ecology courses, and he has been instrumental in developing the Centre of Excellence in Biology Education (bioCEED) at the University of Bergen. During 2012-2015, he served as Head of Education and Deputy Head of Department at BIO, contributing to Bergen's recognition as a Centre of Excellence in Education. Analysis of his recent publications (2020-2024) reveals a strong emphasis on climate change impacts on marine systems, particularly how environmental changes affect fish phenology, distribution patterns, and ecosystem dynamics. His work integrates theoretical modeling with empirical data across multiple spatial and temporal scales, with notable contributions to understanding mesopelagic zone dynamics, tuna reproductive strategies, and cod-capelin interactions. A consistent theme throughout his research is the application of mechanistic models to predict ecosystem responses to environmental change. Excellent Teaching Practitioner from UiB Professor Fiksen has supervised numerous doctoral students including Johanna Myrseth Aarflot, Johanna Jennifer Elisabeth Fall, Tom Langbehn, Agurtzane Urtizbera Ijurko, Øystein Varpe, and Christian Jørgensen. His research has been supported by significant funding from EU, NFR (Norwegian Research Council), and NOKUT, including projects such as ETHOFISH, ADAPT, ECOBE, CLIMAR, TBECO, EGGVALUE, bioCEED, MARmaED, FILAMO, and PANDORA. As part of bioCEED, he has delivered over 40 invited talks on educational activities at local and national forums, demonstrating his commitment to both research and teaching excellence. His laboratory work focuses on theoretical ecology approaches to marine ecosystem modeling, with particular expertise in individual-based models that connect physiological processes to population dynamics. Current research directions include investigating how coastal water darkening affects marine phenology, optimizing tuna spawning strategies, and understanding the three-dimensional spatial dynamics of predator-prey interactions in marine environments.