Ecology

2. An organism that breaks down dead organic matter into simple substances, recycling nutrients in the ecosystem.
5. A complex network of interrelated food chains in an ecosystem, showing the flow of energy and matter among organisms.
6. An organism that obtains its food by eating other organisms in the food chain.
9. A community of living and nonliving things interacting with each other in a specific environment.
11. The variety of living organisms in a particular ecosystem or on the entire Earth.
13. Non-native species that invade and establish in an ecosystem, causing ecological and economic harm.
15. The natural environment where an organism lives, including the physical and biological factors.
16. A large-scale ecosystem with distinct physical and biological features, determined by climate and geography.
18. The hierarchical sequence of organisms in an ecosystem, where each organism feeds on the one below it.
19. The depletion of fish populations due to excessive fishing, causing ecosystem disruption and economic losses.
20. The protection and management of natural resources, including biodiversity, habitats, and ecosystems.

1. Rainfall with a high level of acidic pollutants, causing damage to soil, water, and vegetation.
3. An organism that produces its own food through photosynthesis or chemosynthesis, forming the base of the food chain.
4. The position of an organism in a food chain, determined by its feeding habits and its role in energy transfer.
7. The process of returning a degraded ecosystem to its original state or improving its ecological functions.
8. The clearing of forests for agricultural or urban development, causing habitat destruction and loss of biodiversity.
10. The release of harmful substances into the environment, causing damage to ecosystems and human health.
12. The role of an organism in an ecosystem, including its habitat, behavior, and interactions with other organisms.
14. The study of the relationships between living organisms and their environment.
17. The long-term patterns of temperature, humidity, wind, and precipitation in a particular region.