2. ECOLOGICAL CYCLE
Biogeochemical cycles mainly refer to the movement of nutrients
and other elements between biotic and abiotic factors.
Circulation of nutrients within ecosystem or biosphere.
It is also known as nutrient cycle.
3. Biogeochemical cycles are basically divided into two types:
•Gaseous cycles
Carbon
Oxygen
Nitrogen
Water cycle.
•Sedimentary cycles
Sulphur
Phosphorus
4. WHY
Exchange of nutrients between organisms and their environment is
essential aspects of an ecosystem
BENIFITS
Growth –increase in size
Devolpment (seed to stem to plant to tree)
Maintenance
Reproduction
5. Carbon cycle
Cycle of carbon between biotic and abiotic system is called
carbon cycle.
Carbon enters the atmosphere as CO2
CO2 is absorbed by autotrophs such as green plants
Animals consume plants, thereby, incorporating carbon into
their system
Animals and plants die, their bodies decompose and carbon
is reabsorbed back into the atmosphere.
6. GREEN PLANTS UTILIZE CO2
GLUCOSE
CARBOHYDRATE,PROTIEN AND LIPIDS
STORED UP IN PLANT TISSUES
EATEN BY HERBIVOROUS
CARNIVOROUS ANIMALS
BY PHOTOSYNTHESIS:
7.
8. Nitrogen cycle
All organisms require nitrogen to make amino acids
which in turn are used to build protiens.
Different forms of nitrogen occur naturally in the
biosphere.
Nitrogen gas is the most abundant form of nitrogen on
earth,only certain types of bacteria can use this form
directly.
9.
10. Phosphorus cycle
Transfer of phosphate between biotic and abiotic components
One of the most important cycle in Biogeochemical cycle
Plants obsorbs ionic phosphate through roots and the phosphate
is incorporated in components like
DNA,AMP,ADP,NADP,Phospolipids and hence being eaten by the
animals.
Phosphate is released to the soil by combustion of trees and
grasses
11. Large amount of phosphate is realeased is lost in the sea by sedimentation
Animals dead and decay in soil hence phosphate is absorbed by plants
Plants absorb phosphate through roots
Transferred to animals by eating
Animals die and decay hence phosphate is
released into the soil
And again it is absorbed by the plants
12.
13. Sulfur cycle
Sulfur is one of the processes that allow natural
weathering and other natural processes.
Sulfur cycle does not allow acid rains because it
regulates the amount of sulfur present in the
atmosphere,hydrosphere and lithosphere.
Sulphuric acid forms sulfuric acid,smog when it mixes
with water vapour.
14.
15. Water cycle
The water cycle is the continuous movement from the oceans
to the air and land and then back to then back to the oceans.
6 important processes that make up the water cycle
Evaporation
Transpiration
Accumulation
Condensation
Precipitation
Surface runoff
16.
17. Oxygen cycle
Oxygen cycle , one of the main components of the
earth’s atmosphere , can always be found with other
elements.
The reservoirs are the locations in which oxygen is found
Biosphere(living things)
Lithosphere(Earth’s crust)
Atmosphere(air)
Hydrosphere(water)
