Unit 3124: Ecology and Evolution

1. Introduction to Ecology and Evolution

• Definition and scope of ecology and evolution
• Fundamental principles: interactions between organisms and environment
• Overview of evolutionary theory: species change over time
• Relationship between ecology and evolution

2. Ecological Interactions

• Types of species interactions:
  • Competition: intra- and interspecific
  • Predation and herbivory
  • Mutualism
  • Parasitism
• Impacts on population dynamics
• Effects on community structure and stability

3. Population Ecology

• Population characteristics: size, density, distribution
• Population growth models:
  • Exponential growth
  • Logistic growth
• Factors regulating populations:
  • Birth and death rates
  • Immigration and emigration
• Population regulation mechanisms

4. Community Ecology

• Structure and organization of biological communities
• Species diversity and richness
• Interactions shaping community composition
• Ecological succession:
  • Primary and secondary succession
  • Stages and climax communities

5. Ecosystem Ecology

• Components of ecosystems: biotic and abiotic
• Energy flow:
  • Trophic levels and food webs
  • Energy transfer efficiency
• Nutrient cycling:
  • Carbon, nitrogen, phosphorus cycles
• Ecosystem services and their importance
• Conservation of ecosystems

6. Evolutionary Mechanisms

• Natural selection:
  • Types and examples
• Genetic drift and its effects
• Gene flow between populations
• Mutations as sources of genetic variation
• Adaptation and diversification processes

7. Speciation

• Definition and importance
• Types of reproductive isolation:
  • Prezygotic barriers
  • Postzygotic barriers
• Modes of speciation:
  • Allopatric
  • Sympatric
  • Parapatric
• Examples of speciation events

8. Macroevolution

• Evolutionary patterns at higher taxonomic levels
• Extinction events and their causes
• Adaptive radiations:
  • Definition and examples
• Convergent evolution and analogous structures

9. Human Impact on Ecology and Evolution

• Anthropogenic effects on ecosystems:
  • Habitat destruction and fragmentation
  • Pollution and its consequences
  • Climate change impacts
• Effects on evolutionary processes
• Biodiversity loss and conservation strategies
• Case studies and current challenges