Communities (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Community definition
Community definition
Multiple populations of different species living & interacting in same habitat
Species definition
Species definition
Group of similar organisms capable of interbreeding
Habitat definition
Habitat definition
Specific environment where an organism lives
Population definition
Population definition
Group of same species individuals living in a habitat
Intraspecific competition
Intraspecific competition
Competition within the same species
Interspecific competition
Interspecific competition
Competition between different species
Resources plants compete for
Resources plants compete for
Light, space, water, mineral ions (e.g. nitrates)
Resources animals compete for
Resources animals compete for
Space/territory, food, water, mates
Interdependence definition
Interdependence definition
Organisms in a community depend on each other for survival
Services in interdependence
Services in interdependence
Food, shelter, reproduction (pollination, seed dispersal)
Example: bees & flowers interdependence
Example: bees & flowers interdependence
Bees pollinate flowers
Effect of species removal/addition
Effect of species removal/addition
Greatly impacts entire community (ripple effect)
Stable community definition
Stable community definition
Biotic & abiotic factors balanced; populations stay constant
Examples of stable communities
Examples of stable communities
Tropical rainforests, oak woodlands, coral reefs
Ecosystem definition
Ecosystem definition
Community interacting with abiotic parts of environment