Conserving biodiversity — Eduqas A-Level Geography

Conserving biodiversity is a key topic in WJEC A-Level Geography, focusing on the variety of life on Earth and the strategies used to protect it. Biodiversity encompasses genetic, species, and ecosystem diversity, and its conservation is critical for maintaining ecosystem services, such as pollination, water purification, and climate regulation. This topic explores the threats to biodiversity, including habitat loss, overexploitation, invasive species, and climate change, and evaluates conservation approaches like protected areas, habitat restoration, and international agreements such as the Convention on Biological Diversity.

Understanding biodiversity conservation is essential for grasping broader geographical concepts like sustainability, environmental management, and human-environment interactions. It links to topics such as ecosystems, global governance, and development, as conservation efforts often involve trade-offs between economic growth and environmental protection. Students will examine case studies from different scales, from local community-led initiatives to global treaties, and critically assess their effectiveness in preserving biodiversity for future generations.

This topic is particularly relevant in the context of the current biodiversity crisis, with species extinction rates estimated to be 100 to 1,000 times higher than natural background levels. By studying conservation strategies, students develop analytical skills to evaluate real-world environmental policies and understand the role of stakeholders, including governments, NGOs, and indigenous communities. Mastery of this topic equips students to contribute to informed discussions about environmental stewardship and sustainable development.

• →Biodiversity: The variety of life at all levels, including genetic diversity (variation within species), species diversity (number and abundance of species), and ecosystem diversity (range of habitats and ecological processes).
• →Threats to biodiversity: Habitat loss (e.g., deforestation, urbanisation), overexploitation (e.g., overfishing, poaching), invasive species (e.g., grey squirrels outcompeting red squirrels), pollution, and climate change (e.g., coral bleaching).
• →Conservation strategies: In-situ conservation (e.g., national parks, nature reserves) and ex-situ conservation (e.g., zoos, seed banks). Also, community-based conservation (e.g., CAMPFIRE in Zimbabwe) and international agreements (e.g., CITES, CBD).
• →Trophic cascades: The impact of removing a top predator on lower trophic levels, often leading to ecosystem imbalance. For example, the reintroduction of wolves in Yellowstone restored vegetation by controlling elk populations.
• →Sustainability and trade-offs: Balancing conservation with economic development, such as ecotourism providing income while protecting habitats, or conflicts between agriculture and wildlife corridors.

• Range of conservation strategies (total protection vs. sustainable use)
• Decision-making processes for habitat and species conservation
• Sources and types of funding for conservation

• 💡Ensure you can evaluate the effectiveness of different conservation strategies rather than just describing them.
• 💡Link conservation strategies to the specialised concepts of sustainability, mitigation, and resilience.
• 💡Use specific examples of conservation projects to support your arguments.
• 💡Use specific case studies to illustrate your points, such as the reintroduction of wolves in Yellowstone for trophic cascades or the success of the Convention on International Trade in Endangered Species (CITES) in regulating ivory trade. Examiners reward detailed, named examples.
• 💡Evaluate the effectiveness of conservation strategies by considering both ecological and socio-economic factors. For example, discuss how community-based conservation in Namibia has reduced poaching while improving local incomes, but also note challenges like unequal benefit sharing.
• 💡Link biodiversity conservation to broader geographical themes like globalisation, governance, and sustainability. For instance, explain how international trade drives habitat loss (e.g., palm oil in Indonesia) and how global agreements attempt to mitigate this.

• Misconception: Biodiversity only refers to the number of species. Correction: Biodiversity includes genetic and ecosystem diversity, not just species richness. For example, a monoculture forest may have high species count but low genetic diversity.
• Misconception: Protected areas are always effective for conservation. Correction: Many protected areas suffer from 'paper park' syndrome, where they exist on paper but lack enforcement, funding, or community support. For instance, some national parks in developing countries face illegal logging and poaching.
• Misconception: Conservation always conflicts with economic development. Correction: Sustainable practices like agroforestry or payments for ecosystem services (PES) can align conservation with livelihoods. Costa Rica's PES scheme has increased forest cover while supporting farmers.