Eutrophication of Lakes and Rivers

Eutrophication of Lakes and Rivers
paly

In Chapters 17 and 18 of AP Environmental Science, the topic of eutrophication is explored. This is a process by which a body of water, such as a pond

About Eutrophication of Lakes and Rivers

PowerPoint presentation about 'Eutrophication of Lakes and Rivers'. This presentation describes the topic on In Chapters 17 and 18 of AP Environmental Science, the topic of eutrophication is explored. This is a process by which a body of water, such as a pond. The key topics included in this slideshow are . Download this presentation absolutely free.

Presentation Transcript


Slide1 AP Environmental ScienceChapters 17 and 18

Slide2*Eutrophic Lake

Slide51.   Process by which a body of water such as pond, lake, or river has a sudden increase in  algae concentration (high net primary productivity). 2.   Caused by the infusion of  excess nitrogen & phosphorous nutrients from surface water runoff into local ponds, lakes, river, etc. due to human activity (anthropogenic causes).

Slide6*Occasionally, certain conditions—such as an increase in nutrients in the water—can spur the algae to reproduce rapidly, causing harmful “blooms” that can be toxic to ecosystems.   * Prymnesium parvum , a distant cousin of phytoplankton and giant kelp, is typically found in the  ocean and interferes with aquatic org ability to respire underwater . Not toxic to humans /terrestrial animals. * P. parvum  has also recently bloomed in  freshwater environments, where they’ve had devastating effects, such as fish kills. P. Parvum Highly Toxic

Slide8Nitrogen exists in environment as: a. Atmosphere (78% N2) b. Nitrite (NO3) c. Nitrate (NO4) d. Ammonia (NH3) or Ammonium (NH4) e. Lightning Phosphorous  is commonly found from rocks as PO4.

Slide103.  Consequences of Cultural Eutrophication       a.  Increased algal growth on surface water.   b.  Incr. algae causes water to become cloudy         (low turbidity) and decreases dissolved oxygen in water.    c. Algae can release toxins &interfere with aquatic species respiration ability.    d. Underwater plants die  from low light attenuation, causing bacteria to decompose plants.    e.  Bacteria use up available dissolved oxygen.    f.  Massive fish kills occur.

Slide12*Agricultural fertilizer run- off * Recreational areas such a golf courses * Animal Manure * Fossil fuel * Industrial Discharge * Water sewage power plants effluent

Slide14*Found naturally occurring in rocks. * Found in water systems from sewage transferred from Sewage Treatment Plants (STP) * Each community has standards to process & neutralize body wastes. * STP dumps effluent (cleaned    waste water) into local rivers,     lakes, and ponds.

Slide15*How can eutrophication of aquatic systems be reversed?