Unit 2291: Introduction to Marine Biology

1. Introduction to Marine Biology

• Definition and scope of marine biology
• Historical development of marine biology
• Importance of marine ecosystems to the planet
• Key concepts: biodiversity, ecosystems, and marine food webs

2. Oceanography and Marine Environments

2.1 Physical Characteristics of the Ocean

• Ocean layers: photic, aphotic zones
• Temperature, salinity, and pressure gradients
• Ocean currents and tides

2.2 Chemical Characteristics

• Sea water composition
• Nutrient cycles: nitrogen, phosphorus, carbon
• Dissolved gases: oxygen and carbon dioxide

2.3 Marine Habitats

• Coastal zones (estuaries, mangroves)
• Coral reefs
• Open ocean (pelagic zone)
• Deep sea (abyssal plains, hydrothermal vents)
• Polar marine environments

2.4 Factors Influencing Marine Life Distribution

• Abiotic factors: light, temperature, salinity
• Biotic factors: predation, competition
• Human influences

3. Marine Organisms Classification

• Taxonomic hierarchy overview: domain to species
• Major groups of marine life:
  • Plankton (phytoplankton, zooplankton)
  • Nekton (fish, marine mammals, cephalopods)
  • Benthos (crustaceans, mollusks, echinoderms)
• Evolutionary relationships and phylogeny

4. Adaptations of Marine Life

4.1 Physiological Adaptations

• Osmoregulation
• Bioluminescence
• Pressure tolerance

4.2 Behavioral Adaptations

• Migration and breeding strategies
• Feeding behaviors

4.3 Adaptations to Specific Environments

• Deep-sea hydrothermal vent communities
• Coral reef symbiosis and camouflage
• Polar region antifreeze proteins and insulation

5. Marine Food Chains and Ecosystems

• Trophic levels: producers, consumers, decomposers
• Food chains and food webs
• Energy flow and nutrient cycling
• Keystone species and ecosystem engineers
• Case studies: coral reef ecosystems, kelp forests

6. Threats to Marine Ecosystems

• Overfishing and bycatch
• Habitat destruction (coral bleaching, coastal development)
• Pollution: plastics, oil spills, chemical contaminants
• Climate change impacts: ocean acidification, sea level rise
• Invasive species

7. Conservation and Marine Protected Areas

• Principles of marine conservation biology
• Marine Protected Areas (MPAs): design and management
• Sustainable fishing practices and fisheries management
• Restoration ecology and habitat rehabilitation
• International agreements and policies

8. Marine Research and Technology

• Research methods: field studies, laboratory experiments
• Remote sensing and satellite technologies
• Remotely Operated Vehicles (ROVs) and Autonomous Underwater Vehicles (AUVs)
• Genetic and molecular techniques in marine biology
• Data analysis and modeling tools

9. Careers in Marine Biology

• Marine conservationist
• Marine biologist/research scientist
• Aquaculture specialist
• Marine policy maker and environmental advocate
• Marine educator and communicator
• Emerging career trends and interdisciplinary roles