9700 · 18.3
Conservation
Welcome to our deep dive into **Conservation**, a crucial topic for your Cambridge International A Level Biology Paper 4. In a world facing unprecedented environmental challenges, understanding the principles and practices of conservation is more relevant than ever. This lesson will equip you with the knowledge to ace questions on **biodiversity**, **threats to species**, and the innovative **conservation strategies** used globally to protect our planet's invaluable natural heritage.
Need to know
What you need to know
- Biodiversity is vital for ecological stability, economic resources, ethical reasons, and human well-being.
- The primary threats to biodiversity are habitat destruction, overexploitation, pollution, climate change, and invasive species.
- **In situ conservation** protects species within their natural habitat (e.g., national parks, nature reserves) and is the preferred method for preserving entire ecosystems.
- **Ex situ conservation** protects species outside their natural habitat (e.g., zoos, seed banks, gene banks) and serves as a crucial backup for critically endangered species.
- Captive breeding, often part of ex situ conservation, aims for the eventual reintroduction of species into the wild.
- Sustainable development aims to balance human needs with long-term environmental protection.
- International agreements like CITES and the Ramsar Convention are essential for coordinating global conservation efforts.
Explanation
Conservation
- Biodiversity is vital for ecological stability, economic resources, ethical reasons, and human well-being.
- The primary threats to biodiversity are habitat destruction, overexploitation, pollution, climate change, and invasive species.
- **In situ conservation** protects species within their natural habitat (e.g., national parks, nature reserves) and is the preferred method for preserving entire ecosystems.
- **Ex situ conservation** protects species outside their natural habitat (e.g., zoos, seed banks, gene banks) and serves as a crucial backup for critically endangered species.