Biogeochemical cycles of particular interest in ecology are: * [[w:nitrogen cycle|nitrogen cycle]] * [[w:oxygen cycle|oxygen cycle]] * [[w:carbon cycle|carbon cycle]] * [[w:phosphorus cycle|phosphorus cycle]] * [[w:sulfur cycle|sulfur cycle]] * [[w:water cycle|water cycle]] * [[w:hydrogen cycle|hydrogen cycle]] * [[w:nutrient cycle|nutrient cycle]]