Ecosystem Goods and Services Overview

Ecosystem Goods and Services
  • Definition: Benefits that humans derive from ecosystems, essential for well-being.
  • Components of Well-Being:
    • Security (e.g., safety from disasters)
    • Nutrition (food supply)
    • Clean air and water
    • Health (disease prevention)
    • Economic benefits (jobs and resources)
Importance of Healthy Ecosystems
  • Healthy ecosystems improve human well-being, leading to better public health and economy.
  • Agricultural ecosystems benefit from pollinator presence, supported by diverse ecosystems.
  • Impact of unhealthy ecosystems:
    • Increased disease transmission from wildlife to humans due to ecosystem degradation.
Land Use and Ecosystem Health
  • Human activities (pollution, land encroachment) actively impact ecosystem health.
  • Climate change creates challenges for species survival and ecosystem functioning.
  • Governance policies are essential to protect ecosystem services while balancing human needs.
Ecosystem Goods and Services Categories
  • Provisioning Services: Tangible products (water, food, wood).
  • Regulating Services: Climate regulation, pollination, flood protection.
  • Cultural Services: Recreational and aesthetic benefits (nature appreciation).
  • Supporting Services: Nutrient cycling, soil formation necessary for primary production.
Economic Value of Ecosystems
  • Ecosystems' value surpasses global GDP.
  • In 1998, economists assessed ecosystems’ worth in relation to goods, materials, and services provided, demonstrating their crucial economic role.
Decline of Ecosystem Health
  • Increasing pressure leading to loss of biodiversity or ecosystems.
  • Example of Tragedy of the Commons: Overexploitation (overfishing, deforestation) leading to long-term resource depletion.
  • Estimated loss of $4-20 trillion annually in ecosystem services highlights need for sustainable practices.
Biodiversity Overview
  • Definition: Variety of life, including species richness and genetic diversity.
  • Importance of genetic diversity in resilience to environmental pressures.
  • Current estimates suggest 1.6 million species described but many undiscovered.
Role of Biodiversity
  • Essential for ecosystem processes supporting life (e.g., pollination, nutrient cycling).
  • Direct benefits to humans:
    • Food sources (fish, crops)
    • Medical resources from diverse plant species
    • Ecosystem services supporting flood mitigation and habitat stability.
Measuring Biodiversity
  • Techniques include field samples, surveys, satellites, drones, and DNA sampling.
  • Citizen science plays a role in data collection and awareness.
Threats to Biodiversity
  • Habitat Loss: Due to urbanization, agriculture, pollution, etc.
  • Invasive Species: Harmful species disrupting local ecosystems.
  • Climate Change: Affecting habitats and species viability.
Niche and Habitat Definitions
  • Habitat: Specific physical location where species exist (e.g., wetlands, forests).
  • Niche: Role and function of species within its habitat (e.g., feeding, behavior).
  • Recognizing the interconnectedness within ecosystems helps in understanding ecological balance.
Species Relationships
  • Predator-Prey: Essential for population control.
  • Parasitism: One organism benefits at another's expense.
  • Commensalism: One organism benefits while the other is unaffected.
  • Mutualism: Both organisms benefit from the interaction.
Ecological Dominance and Keystone Species
  • Ecological dominance reflects few species abundant in a community, typically plants.
  • Keystone species play critical roles, and their absence can lead to significant community changes. Visibility of predator species can maintain ecological balance.
Conclusion
  • Understanding ecosystem dynamics is essential for promoting biodiversity and sustainability. This knowledge helps inform better governance and conservation practices.