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Biogeochemical cycles
Biogeochemical cycles are the natural pathways through which essential elements like carbon, nitrogen, and phosphorus circulate between the biotic (living) and abiotic (non-living) components of Earth.
Eutrophication
Eutrophication is a process where excess nutrients, primarily nitrates and phosphates, enter aquatic ecosystems, triggering a cascade of ecological changes.
Sink in biogeochemical cycles
A sink is a location in an ecosystem where a chemical element is accumulated or stored over time, leading to a net increase in that element in that location.
Sources in biogeochemical cycles
A source is a location or process in which a chemical element is released into the environment, leading to a net increase in the amount of the element in the atmosphere or other parts of the ecosystem.
Stores in biogeochemical cycles
Stores are components in the ecosystem where elements are held for relatively long periods.