Pre-existing nitrogen-fixing plant communities

Soil nutrients deposited by a nearby river

Wind-carried soil particles and nutrients

The time-consuming process of weathering the bedrock into smaller particles

Feces from wildlife populations that occupy the region

Pre-existing nitrogen-fixing plant communities

Soil nutrients deposited by a nearby river

Wind-carried soil particles and nutrients

The time-consuming process of weathering the bedrock into smaller particles

Feces from wildlife populations that occupy the region

Lichen and grass communities establishing themselves on a recently-formed island, resulting from an uplift in the ocean bedrock

Native grass communities forming after a wildfire burned through a meadow/woodland ecosystem

Seedlings establishing themselves in a heavily logged area where the seed-tree cutting method was employed

Lichens re-establish themselves on rocks and shallow soil beds following a tundra fire

Coral reef and aquatic wildlife communities that have re-established themselves in regions of the South Pacific that were evacuated following the nuclear tests conducted by the U.S. military

Lichen and grass communities establishing themselves on a recently-formed island, resulting from an uplift in the ocean bedrock

Native grass communities forming after a wildfire burned through a meadow/woodland ecosystem

Seedlings establishing themselves in a heavily logged area where the seed-tree cutting method was employed

Lichens re-establish themselves on rocks and shallow soil beds following a tundra fire

Coral reef and aquatic wildlife communities that have re-established themselves in regions of the South Pacific that were evacuated following the nuclear tests conducted by the U.S. military

The phosphorus cycle does not include a gaseous phase, resulting in no significant quantities of atmospheric phosphorus.

Phosphorus is not fixed in the atmosphere by lightning.

Phosphorus does not enter the cycle from weathering of sediments and parent material.

Phosphorus is not taken up by plants and is a strictly inorganic cycle.

Phosphorus is cycled back into the soil through precipitation.

The phosphorus cycle does not include a gaseous phase, resulting in no significant quantities of atmospheric phosphorus.

Phosphorus is not fixed in the atmosphere by lightning.

Phosphorus does not enter the cycle from weathering of sediments and parent material.

Phosphorus is not taken up by plants and is a strictly inorganic cycle.

Phosphorus is cycled back into the soil through precipitation.