This topic is included in A-level Component 3 for WJEC (England) Geography, and A-level Unit 4 for WJEC (Wales) Geography. You can find notes and articles for it below.
Notes on Ecosystems – WJEC Geography A-level
Arctic Sea Ice – Annotated Article
Biodiversity Managment
Biodiversity Threats
Biodiversity Under Threat
Biodiversity
Coastal Ecosystem Management
Desert Ecosystems
Environmental Impacts of Oil
Rainforest Biodiversity
Salt Marsh
The Amazon
Tropical Rainforest
Urban Ecosystems