Biogeochemical Cycles

Biogeochemical Cycles

-Important for life functioning

-Important for solving environmental problems

-Natural pathways

Keys to life

Water, Carbon, Nitrogen, Phosphorus, Sulfur

Water

Important driver of the other biogeochemical cycles

Carbon

Key component of fossil fuels

Nitrogen

needed for DNA, RNA, PROTEIN. Essential element for plants and human agriculture.

Phosphorus

Key component of DNA and RNA. One of the main ingredients in artificial fertilizers in agriculture.

Sulfur

Key to protein structure and is released into the atmosphere by burning of fossil fuels.

types of biogeochemical cycles

water cycle, carbon-oxygen cycle, nitrogen cycle, phosphorus cycle

water cycle

Vital component for the biogeochemical cycle as water is essential for all organisms.

Three phases (Solid, Liquid, Gas), Water ties together the major parts of the Earth's system: air, clouds, ocean, lakes, vegetation, snowpack, and glaciers.

Transpiration

Evaporation of water from the leaves of a plant

Runoff

Pababa ang ulan galing sa bundok (water will find natural pathways)

Infiltration

Surface water moves into the soil

Percolation

The downward movement of water through soil and rock due to gravity.

carbon-oxygen cycle

The Carbon–Oxygen Cycle describes how carbon (C) and oxygen (O₂) move and are exchanged among the atmosphere, plants, animals, and the environment.
These two elements are closely linked through the processes of photosynthesis and respiration.

Who gives the most oxygen?

Marine planktons about 50 to 80%.

Nitrogen Cycle

Nitrogen is critical component of amino acids, proteins, and nucleic acids.

Involves conversion of nitrogen gas into organic nitrogen by nitrogen fixing bacteria

Plants benefit more in nitrogen

Nitrogen is released into the atmosphere is called (decomposition)

eutrophication

Excess amount of nitrogen

Phosphorus cycle

Critical component for DNA, RNA, and ATP.

Weathering and Erosion

Plant absorbs phosphorus from the soil and incorporate it into organic molecules.

Animals obtain phosphorus through consuming plants or other animals

Phosphorus is then released back into the atmosphere through decomposition

Sublimation

Solid to gas

Deposition

Gas to solid

evaporation

liquid to gas

condensation

gas to liquid

carbon sinks

absorbs carbon

carbon sources

releases carbon

transpiration

process by which plants lose water vapor