Biogeochemical cycle
- Introduction to biogeochemical cycle
- The water cycle
- The carbon cycle
- The nitrogen cycle
- The phosphorus cycle
- Impacts of human activities on biogeochemical cycles
- Conclusion and future implications
Biogeochemical Cycle
The biogeochemical cycle is a fundamental process that involves the
movement of nutrients between living organisms and their environment.
Join us on a journey through the cycles that sustain life on Earth.
The Water Cycle
Precipitation Surface Runoff Groundwater Recharge
Water evaporates from Excess water from rain or Water percolates through
bodies of water, condenses melting snow flows into the soil and replenishes
as clouds, and eventually rivers, lakes, and oceans, underground water sources,
falls back to the earth as replenishing the bodies of such as aquifers, sustaining
rain, snow, or hail. water. plants and animals.
Evaporation
Sunlight causes water to
evaporate from oceans,
lakes, and soil, turning liquid
water into water vapor.
The Carbon Cycle
Photosynthesis
Plants absorb carbon dioxide from the atmosphere and convert it into glucose through
the process of photosynthesis.
Respiration
Animals and plants release carbon dioxide back into the atmosphere as a byproduct of
cellular respiration.
Decomposition
When plants and animals die, their organic matter decomposes, releasing carbon
dioxide and returning nutrients to the soil.
The Nitrogen Cycle
1. Nitrogen Fixation
Nitrogen-fixing bacteria convert atmospheric nitrogen into a usable form that plants can absorb.
2. Nitrification
Other bacteria convert ammonia into nitrites and then nitrates, which are taken up by plants.
3.Denitrification
Denitrifying bacteria convert nitrates back into atmospheric nitrogen, completing the cycle.
The Phosphorus Cycle
1 Weathering 2 Uptake by Plants
Over time, rocks containing phosphorus Plants absorb phosphorus from the soil,
break down, releasing phosphorus into incorporating it into their tissues and
the soil and water. transferring it through the food chain.
3 Decomposition 4 Sedimentation
When plants and animals decay, Over time, phosphorus can accumulate
phosphorus is released back into the in sedimentary rocks, gradually
soil, where it can be reused. removing it from the active cycle.
Impacts of Human Activities on Biogeochemical Cycles
Deforestation Fertilizer Use Industrial Emissions
Clearing forests disrupts Excessive use of nitrogen- Burning fossil fuels
the carbon cycle, releasing based fertilizers in releases large amounts of
stored carbon dioxide and agriculture can lead to carbon dioxide into the
reducing the planet's water pollution through atmosphere, accelerating
capacity to absorb it. runoff and disrupt the climate change and the nitrogen cycle. carbon cycle.
Conclusion and Future Implications
Environmental Sustainable Practices Global Collaboration
Stewardship
Transitioning to renewable Addressing the challenges
Understanding and energy sources, reducing posed by climate change
preserving biogeochemical waste, and promoting requires international
cycles is crucial for sustainable agriculture are cooperation and collective
maintaining a healthy planet key steps towards a action.
and sustaining future balanced future.
generations.
