This topic explores the levels of organisation within ecosystems, the principles of material cycling, and the importance of biodiversity. It examines how organisms interact with each other and their environment, the impact of human activity on these systems, and the biological challenges of maintaining food security.
Ecosystems are dynamic systems where living organisms (biotic factors) interact with each other and their non-living environment (abiotic factors). In WJEC GCSE Biology, you'll explore how energy flows through food chains and webs, how nutrients cycle (e.g., carbon and nitrogen cycles), and how populations change over time due to factors like predation, competition, and human impact. Understanding ecosystems is crucial because it explains the balance of nature and the consequences of disrupting it, such as through deforestation or pollution.
This topic builds on earlier concepts like photosynthesis and respiration, linking them to larger-scale ecological processes. You'll learn to interpret data from quadrats and transects to estimate population sizes, and evaluate the effects of environmental changes. Mastery of ecosystems is not only essential for exams but also for understanding real-world issues like climate change and conservation, making it a key part of your biology curriculum.
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