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Aquatic Ecosystems
Presented By:
Muhammad khuzaima
(14041561-011)
What is an aquatic ecosystem?
 Aquatic ecology is the study of water based
ecosystems.
 They are an area of water, in wh...
How many types are there?
Several, depending on how close we look!
Freshwater (Limnology)
 Lakes (lentic)
 Rivers (lot...
Importance of aquatic ecosystems
 Biodiversity
Species richness/trophic structure
 Breeding
Breeding grounds for many ...
NB water available and suitable for human use, agriculture and industry is limited, literally a
“drop in the bucket.”
Only...
Freshwater
Ecosystems
 Include:
 Ponds, Lakes, Streams,
Rivers, and Wetlands
Wetlands– Area of land that
are periodical...
Characteristics of Aquatic Ecosystems
Factors such as temperature, sunlight, oxygen, and nutrients
determine which organis...
Lakes and
Ponds
Can form naturally where groundwater reaches the Earth’s surface.
Humans intentionally create artificial l...
Ponds and Lakes
oRange in size from just a few square meters
to thousands of square kilometers
oPonds may be seasonal, las...
Life in a Lake
Littoral zone -shallow zone where light reaches the bottom and
nurtures plants, and aquatic life is diverse...
How Nutrients Affect Lakes
Eutrophication -increase in the amount of nutrients,
such as nitrates, in an aquatic ecosystem....
Aquatic Ecosystem
A river is usually cold and full of oxygen and runs swiftly
through a shallow riverbed.
As a river flows down a mountain, ...
Streams & Rivers
 Bodies of flowing water moving in one direction
 Found everywhere—they get their start at
headwaters, ...
Life in a River
• Mosses anchor themselves to rocks.
• Trout and minnows are adapted to the cold, oxygen
rich water.
• Pla...
 Industries use river water in manufacturing processes and
as receptacles for wastes.
 People have used rivers to dispos...
What factors can alter aquatic ecosystems?
• Natural Succession-
normal cycle of pond
becoming forest
• Artificial Success...
What factors can alter aquatic ecosystems?
• Water Pollution
• Excessive use of
Fertilizers
• Industries
• Waste Disposal
Water Pollution
Water Pollution
Water Pollution occurs when energy and other
materials are released into the water,
contaminating the qual...
Types
Surface water pollution
> found on the exterior of the Earth's
crust, oceans, rivers and lakes
Groundwater Pollution...
Types
Microbiological pollution
>microorganisms that thrives on water
and fishes that can cause illness to land
animals an...
Different Causes of Water Pollution
Marine Dumping
Industrial Waste
Sewage, mainly
from households
Different Causes of Water Pollution
Nuclear waste
Oil pollution
Underground
storage leaks
Effects on Environment
Toxic water
Thermal heating
Our sources of
water
Effects on Humans
 Diseases caused by:
Drinking
contaminated
water
Swimming in
polluted water
Contact with
chemically
...
Effects on Animals
 200 turtles in Australia’s surround
waters die each year
Effects on Animals
 Birds and mammals become
coated with oil
What You Can Do
Turn off running water
Be cautious of what you pour in your
sink/flush down your toilet
Fertilize correctly
Participate in a clean up
Join a special society devoted to the
prevention of water pollution
Spread awareness
THANK YOU!!!
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Aquatic ecosystem and water pollution

Aquatic ecosystem and water pollution by muhammad khuzaima

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Aquatic ecosystem and water pollution

  1. 1. Aquatic Ecosystems
  2. 2. Presented By: Muhammad khuzaima (14041561-011)
  3. 3. What is an aquatic ecosystem?  Aquatic ecology is the study of water based ecosystems.  They are an area of water, in which ‘significant’ biological activity can occur  This definition excludes most groundwater systems  Aquatic ecosystems can involve flowing or still water, and can be fresh or saline
  4. 4. How many types are there? Several, depending on how close we look! Freshwater (Limnology)  Lakes (lentic)  Rivers (lotic) Groundwater Brackish water (inter-tidal) Marine water (Oceanography) Anthropogenic waters (i.e drinking water)
  5. 5. Importance of aquatic ecosystems  Biodiversity Species richness/trophic structure  Breeding Breeding grounds for many species  Buffer systems Physical and chemical  Sinks Resting places for sediments and chemicals  Only part of the hydrological cycle What other parts are there?
  6. 6. NB water available and suitable for human use, agriculture and industry is limited, literally a “drop in the bucket.” Only 8 ten thousandths of a percent [0.0008%] of the world’s water is available and usable. RESERVOIRS
  7. 7. Freshwater Ecosystems  Include:  Ponds, Lakes, Streams, Rivers, and Wetlands Wetlands– Area of land that are periodically under water or whose soil contains a great deal of moisture Normally on the edge of a pond , lake or river.
  8. 8. Characteristics of Aquatic Ecosystems Factors such as temperature, sunlight, oxygen, and nutrients determine which organisms live in which area of the water. Three groups of aquatic organisms include: Plankton - mostly microscopic organisms that float or drift freely in the water, and can be microscopic animals (zooplankton) or microscopic plants (phytoplankton). Nekton - are all organisms that swim actively in open water, independent of currents. Benthos - are bottom-dwelling organisms of the sea or ocean and are often attached to hard surfaces.
  9. 9. Lakes and Ponds Can form naturally where groundwater reaches the Earth’s surface. Humans intentionally create artificial lakes by damming flowing rivers and streams to use them for power, irrigation, water storage, and recreation (reservoir). Structured into horizontal and vertical zones. The types of organisms present depend on the amount of sunlight available.
  10. 10. Ponds and Lakes oRange in size from just a few square meters to thousands of square kilometers oPonds may be seasonal, lasting just a couple of months (such as sessile pools) oLakes may exist for hundreds of years or more oMay have limited species diversity since they are often isolated from one another and from other water sources like rivers and oceans
  11. 11. Life in a Lake Littoral zone -shallow zone where light reaches the bottom and nurtures plants, and aquatic life is diverse and abundant. In open water, plants, algae, and some bacteria capture solar energy to make their own food during photosynthesis. Benthic zone - region near the bottom of a pond, lake or ocean which is inhabited by decomposers, insect larvae, and clams. Some bodies of fresh water have areas so deep that there is too little light for photosynthesis. Bacteria live in the deep areas of freshwater. Eventually, dead and decaying organisms reach the benthic zone.
  12. 12. How Nutrients Affect Lakes Eutrophication -increase in the amount of nutrients, such as nitrates, in an aquatic ecosystem. As the amount of plants and algae grow, the number of bacteria feeding on the decaying organisms also grows. These bacteria use the oxygen dissolved in the lake’s waters. Eventually the reduced amount of oxygen kills oxygen loving organisms.
  13. 13. Aquatic Ecosystem
  14. 14. A river is usually cold and full of oxygen and runs swiftly through a shallow riverbed. As a river flows down a mountain, it may broaden, become warmer, wider, slower, and decrease in oxygen. A river changes with the land and the climate through which it flows.
  15. 15. Streams & Rivers  Bodies of flowing water moving in one direction  Found everywhere—they get their start at headwaters, which may be springs, snowmelt or even lakes  Travel all the way to their mouths, usually another water channel or the ocean
  16. 16. Life in a River • Mosses anchor themselves to rocks. • Trout and minnows are adapted to the cold, oxygen rich water. • Plankton can float in the warmer, calmer waters. • Plants here can set roots in the river’s rich sediment. • Fish such as catfish and carp also live in these calmer waters.
  17. 17.  Industries use river water in manufacturing processes and as receptacles for wastes.  People have used rivers to dispose of their sewage and garbage.  These practices have polluted rivers with toxins, which have killed river organisms and made river fish inedible.  Today, runoff from the land puts pesticides and other poisons into rivers and coats riverbeds with toxic sediments.
  18. 18. What factors can alter aquatic ecosystems? • Natural Succession- normal cycle of pond becoming forest • Artificial Succession- humans add N & P to water via fertilizer & sewage causing succession to happen faster = EUTROPHICATION
  19. 19. What factors can alter aquatic ecosystems? • Water Pollution • Excessive use of Fertilizers • Industries • Waste Disposal
  20. 20. Water Pollution
  21. 21. Water Pollution Water Pollution occurs when energy and other materials are released into the water, contaminating the quality of it for other users.
  22. 22. Types Surface water pollution > found on the exterior of the Earth's crust, oceans, rivers and lakes Groundwater Pollution >found in soil or under rock structure or aquifers
  23. 23. Types Microbiological pollution >microorganisms that thrives on water and fishes that can cause illness to land animals and humans Oxygen Depletion pollution >microorganisms that in water and feeds on biodegradable substances
  24. 24. Different Causes of Water Pollution Marine Dumping Industrial Waste Sewage, mainly from households
  25. 25. Different Causes of Water Pollution Nuclear waste Oil pollution Underground storage leaks
  26. 26. Effects on Environment Toxic water Thermal heating Our sources of water
  27. 27. Effects on Humans  Diseases caused by: Drinking contaminated water Swimming in polluted water Contact with chemically polluted water
  28. 28. Effects on Animals  200 turtles in Australia’s surround waters die each year
  29. 29. Effects on Animals  Birds and mammals become coated with oil
  30. 30. What You Can Do
  31. 31. Turn off running water
  32. 32. Be cautious of what you pour in your sink/flush down your toilet
  33. 33. Fertilize correctly
  34. 34. Participate in a clean up
  35. 35. Join a special society devoted to the prevention of water pollution
  36. 36. Spread awareness
  37. 37. THANK YOU!!!

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