Nitrogen Cycle
% of Earths atmosphere that is nitrogen gas
78%
movement of particular chemical through the biological and geological, or living and non living, parts of an ecosystem
Biogeochemical cycle
Building block of life - its key to the structure of all organisms on our planet.
Carbon
Where does the phosphorus cycle start?
Weathering of rocks
Natural disruptions include
earthquakes, landslides, changes in water movement
Certain types of bacteria convert gaseous nitrogen into ammonia
nitrogen fixation
% oceans that is covered on Earth
70%
What phases can carbon be found in
Solid, Liquid, gaseous
When the producers and consumers die, what happens?
Decomposers break down the organisms
Human actions disrupt both
biogeochemical cycles and ecosystems
Forms nitrates which are absorbed by soil when combined with rainwater.
Nitrogen oxide
85%
Evaporation occurs between oceans and the atmosphere
2 sources of carbon
CO2 gas in atmosphere, bicarbonate dissolved in water, fossil fuels, carbonate rocks, limestones
What take up phosphate at the start of the phosphorus cycle?
Plants and fungi
What does cars, factories, and power plants do to the environment?
Release carbon into the atmosphere as carbon dioxide
When decomposers breaks down animal excretions or dead animal and plant matter, nitrogen is returned to the soil as ammonium
Ammonification
What happens to precipitation?
Seeps into ground, some drops into ponds, streams, lakes, or other waterways.
The simplest transfer of carbo occurs between
plants and animals
For what is phosphorus a limiting factor?
growths of plants
Explain poor farming practices.
Depletion of soil nutrients. Replacing these nutrients through man made fertilisers cam lead to contaminated runoff. When fertiliser-contaminated runoff enters bodies of water, the nutrients promote the overgrowth of algae population and can cause algal blooms.
Bacteria change ammonium into nitrate
Nitrification
Flows into the atmosphere as a byproduct of photosynthesis. Organisms take in this oxygen and release it as carbon dioxide through respiration.
Oxygen cycle
Carbo is retruned to the atmosphere as CO2 by
respiration, burning of fossil fuels, emission from factories, atmospheric carbon is methane
What is algal blooms?
Blooms crowd out other plant species and negatively impact wildlife populations
Exaplain what herd animals and feedlots do to the environment.