The amount of dissolved oxygen required to degrade organic material in a given volume of water via aerobic biological activity.
Organic = any living plant or animal, remnants or matter.
1 of 4
Succession
Changes of community over time - organisms changing the physical environment (edaphic factors) that then allow other communities to become more established,then replace former species via competition, latter seres are more complex -climax communities.
Edaphic = soil profile
2 of 4
Ecosystem & Biome
Ecosystem: A community if interdependent organisms and the physical environment they inhibit. Including abiotic and biotic factors.
Biome: A collection of ecosystems sharing similar climatic conditions.
3 of 4
Eutrophication
An excess input of nutrients into a freshwater ecosystem, mostly from anthropogenic activity such as fertilizer use which involve harmful nitrates and phosphates, sewage and detergents.
Leading to algae blooms which prevent photosynthesis and deplete oxygen levels.
Comments
No comments have yet been made