Here's how Posphorus Circulates through its cycle.pptx.pdf

Phosphorus cycle

1. Here's how
Phosphorus
circulates
through its cycle
Phosphorus Cycle
Terrestrial & Aquatic Environments

2. Phosphorus
(P)
Phosphorus is needed to make:

DNA Nucleotides (Phosphate group)

ATP (Cellular Energy)

Phospholipids
- outer boundary of cells

3. The Phosphorus Cycle
The phosphorus cycle is a biogeochemical process describing how
phosphorus (P) moves through the biosphere, the hydrosphere, and the
lithosphere . The phosphorus cycle does not include the atmosphere
because very little phosphorus circulates through the atmosphere as a gas.

4. The Cycle
●Weathering of Rocks
The weathering of rocks containing phosphate minerals is the main
way that phosphorus enters the cycle. Phosphate ions are released by
this mechanism into the water and soil.
●Absorption by Plants and
Animals
Phosphorus can be absorbed by plants, fungus, and microbes and
used by them for growth once they are in the soil. A portion of it also
finds its way into freshwater bodies of water, such as the ocean, where
it is drunk by animals and absorbed by plants along with phosphorus.
The phosphorus enters the animals when they eat the vegetation.
●Decomposition
Decomposers (such as bacteria and fungus) break down the organic
matter left behind by dead plants and animals, returning phosphorus
to the soil in the form of inorganic phosphate.
●Sedimentation
When phosphorus-containing compounds from the bodies or wastes
of marine organisms sink to the floor of the ocean, they form new
sedimentary layers. Over long periods of time, phosphorus-containing
sedimentary rock may be moved from the ocean to the land by a
geological process called uplift.
●Uplift and Exposure
Geological processes such as tectonic uplift can expose these
phosphate-rich sediments at the Earth's surface, where they can again
be weathered, continuing the cycle.

The phosphorus cycle is a biogeochemical process describing how phosphorus (P) moves through the
biosphere, the hydrosphere, and the lithosphere . The phosphorus cycle does not include the atmosphere
because very little phosphorus circulates through the atmosphere as a gas.

5. The Phosphorus Cycle
Weathering of Rocks

The weathering of rocks containing phosphate minerals is the main way that phosphorus enters the cycle.
Phosphate ions are released by this mechanism into the water and soil.

6. The Phosphorus Cycle
Absorption by Plants and Animals

Phosphorus can be absorbed by plants, fungus, and microbes and used by them for growth once they are in
the soil. A portion of it also finds its way into freshwater bodies of water, such as the ocean, where it is drunk by
animals and absorbed by plants along with phosphorus. The phosphorus enters the animals when they eat
the vegetation.

7. The Phosphorus Cycle
Decomposition

Decomposers (such as bacteria and fungus) break down the organic matter left behind by dead plants and
animals, returning phosphorus to the soil in the form of inorganic phosphate.

8. The Phosphorus Cycle
Sedimentation

When phosphorus-containing compounds from the bodies or wastes of marine organisms sink to the floor of
the ocean, they form new sedimentary layers. Over long periods of time, phosphorus-containing sedimentary
rock may be moved from the ocean to the land by a geological process called uplift.

9. The Phosphorus Cycle
Uplift and Exposure

Geological processes such as tectonic uplift can expose these phosphate-rich sediments at the Earth's
surface, where they can again be weathered, continuing the cycle.

10. Occurrence of Algal bloom in
Laguna de bay
Source: Laguna Lake Development Authority

Source: Laguna Lake Development Authority

11. Source: Laguna Lake Development Authority

https://view.officeapps.live.com/op/view.aspx?src=https%3A%2F%2Fpsa.gov.ph%2Fsystem%2Ff
iles%2Fenrad%2FTable%25201.31%2520Concentration%2520Level%2520of%2520Phosphate%
2520in%2520Laguna%2520de%2520Bay%2520and%2520its%2520Major%2520Tributaries%25
2C%25202012-2022.xlsx&wdOrigin=BROWSELINK
Concentration Level of Phosphate
in Laguna de Bay and its Major
Tributaries by Station

12. Mass Coral
Bleaching in
Talim Bay, Lian,
Batangas
Source: DLSU Br. Alfred Shields FSC
Ocean Research Center- FB Page

https://www.facebook.com/dlsushore

13. Actions to
reduce or
eliminate
✔Catchment
management
✔Restoratio
n
✔Control
MITIGATION STRATEGIES
3 COMPONENTS TO REHABILITATION

14. Three Common Methods:

15. (1)Strategy: Restoration
DEEP AERATION

16. DEEP AERATION
-Mechanical method
-O
2
injection, stirring, etc.

17. DEEP AERATION
-Multiple stations will be chosen to be subjected
to aeration (LLDA, 2023).
Two purposes:
❖to improve DO concentration
without changing the water layer,
thus stimulating transformation of
the anaerobic environment into an
aerobic environment; and
❖to enhance the growth
environment of benthonic
organisms and increase the food
supply.

18. (2) Strategy: Control
RIPARIAN BUFFERS
Deliver numerous benefits:
❖Filtering nutrients, pesticides, and animal waste
❖Stabilizing eroding banks
❖Filtering sediment from runoff
❖Provide shelter, shade, and food for fish and other aquatic organisms, and etc.

19. RIPARIAN BUFFERS
-Buffer zones (Mangrove areas)
-Needs continuous long-term
management to ensure
benefits

20. Possible Effective Strategy
Biological Methods
❖uses specific microorganisms, aquatic plants, and
aquatic animals to degrade, absorb, and transform
lake nutrients.

21. BIOLOGICAL METHODS
●Bioremediation
●Biomanipulation technologies
Ecological Engineering

22. Ecological Engineering

23. References:

●Kang, S., Luo, P., Lyu, J., Wang, P., Zhang, Y., Zhao, S., and Zhou, M. 2020. Control
and Remediation Methods for Eutrophic Lakes in the past 30 years. Water Sci Technol.
81 (6): 1099-1113.
●Broadmeadow, S. and Nisbet, T.R. 2004. The Effects of Riparian Forest Management
Freshwater Environment: A Literature Review of Best Management Practice. Hydrol.
Earth Syst. Sci. 8: 286-305.
●Rinkevich, B. 2021. Ecological Engineering Approaches in Coral Reef Restoration. ICES
Journal of Marine Science. 8 (1): 410-420.
●Escober, E. and Espino, M. 2023. A New Trophic State Index for Assessing
Eutrophication of Laguna de Bay, Philippines. Environmental Advances. 13: 2666-7657.

24. Thanks!