IB Environmental systems and societies 3.3A Arguments for Conservation and Strategies Notes

Five Arguments for Conserving Species and Habitats

1. Arguments for conservation fall into five categories: aesthetic, ecological, economic, ethical, and social.
2. Each shows the value of biodiversity in a different way, for ecosystems and for people.

Aesthetic Value: Nature's Beauty Has Worth

1. Aesthetic value is the visual and emotional appeal of natural environments.
2. This beauty inspires art, literature, and personal reflection.
3. It also underpins ecotourism, which depends on attractive landscapes to draw visitors.

Ecological Value: Ecosystems Keep Us Alive

1. Ecosystems provide services that support life and are often irreplaceable by technology.
   1. Nutrient cycling: decomposers break down organic matter and enrich soils.
   2. Pollination: insects such as bees pollinate crops and secure food production.
   3. Climate regulation: forests absorb carbon dioxide and help slow climate change.
   4. Water purification: wetlands filter pollutants and provide clean water.

Economic Value: Biodiversity Is Natural Capital

1. Biodiversity is natural capital, supplying goods and services with real economic value.
   1. Ecotourism: generates income for local communities and funds conservation.
   2. Genetic resources: wild species contribute to agriculture and medicine.
   3. Ecosystem services: pollination, water purification, and climate regulation are worth trillions of dollars a year.

Ethical and Social Value: Duty, Culture, and Fairness

1. Ethically, many argue species have intrinsic value, a worth of their own regardless of use to humans.
2. This creates a duty of stewardship to protect biodiversity for future generations.
3. Socially, nature holds cultural, spiritual, and recreational value, and access to it raises questions of fairness.

Two Approaches: Ex Situ and In Situ Conservation

1. Ex situ conservation protects species outside their natural habitat, used when a species is critically endangered or its habitat is destroyed.
2. In situ conservation protects species within their natural habitat, preserving whole ecosystems and ecological interactions.

Ex Situ: Zoos, Captive Breeding, and Seed Banks

1. Zoos and captive breeding maintain healthy populations and can reintroduce animals to the wild.
   1. They also educate the public and fund conservation, not just entertain.
2. Seed banks store seeds to preserve plant genetic diversity.
   1. They act as a safety net against extinction from climate change, disease, or habitat loss.

In Situ: Protected Areas and National Parks

1. National parks and reserves protect ecosystems and give species a refuge.