GCSE Biology – Eutrophication Explained

GCSE Biology – Eutrophication Explained (Causes & Effects) This GCSE Biology video explains eutrophication clearly and simply for exam success. In this video, GCSE students learn what eutrophication is and how it affects aquatic ecosystems in GCSE Biology. The lesson explains how fertilisers containing nitrates and phosphates enter rivers and lakes through runoff, how this causes rapid algal growth, and how algal blooms block light and reduce oxygen levels when algae die and decompose. The impact on aquatic organisms, fish deaths, and ecosystem balance is clearly explained step by step. This video is designed for GCSE Biology revision and supports students studying AQA GCSE Biology, OCR GCSE Biology, and Edexcel GCSE Biology. It is suitable for Year 9, Year 10, and Year 11 students and covers a key part of the ecology and environmental impact topic. Students will develop understanding of nutrient pollution, algal blooms, oxygen depletion, food webs, ecosystem disruption, and common GCSE Biology exam questions on eutrophication. GCSE Biology exam topic: ecology and environmental impact. Supports AQA, OCR, and Edexcel GCSE Biology revision on eutrophication, nutrient cycles, water pollution, and ecosystem balance. Related topics include the nitrogen cycle, food chains, pollution indicators, human impacts on ecosystems, and sustainability.