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Ecology — Ecosystems and Biomes

How organisms interact with their environments

E
eco_tangle 15 terms Jan 14, 2026
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Terms 15

1
Ecosystem
Community of living organisms and their physical environment interacting as a system
2
Biome
Large geographic region defined by climate and characteristic plant communities
3
Food Web
Complex network of feeding relationships in an ecosystem
4
Producer
Organism making its own food via photosynthesis; base of food chain
5
Consumer
Organism that obtains energy by eating other organisms
6
Decomposer
Organism breaking down dead matter and recycling nutrients; fungi, bacteria
7
Carrying Capacity
Maximum population size an environment can sustainably support
8
Niche
Organism's role and position in its ecosystem including resources and interactions
9
Symbiosis
Long-term relationship between two species
10
Mutualism
Symbiotic relationship benefiting both species
11
Parasitism
One organism benefits at expense of another
12
Commensalism
One species benefits; other is unaffected
13
Keystone Species
Species with disproportionately large effect on ecosystem stability
14
Invasive Species
Non-native organism causing harm to local ecosystem
15
Biodiversity
Variety of life in an area; essential for ecosystem resilience