Transcript Lecture: Biological Contaminates

Lecture Quiz
1:
A water sample reveals that the following
chemical contaminates were found in it
(Phosphates, Nitrates, and Sulfides).
Based on this you can conclude that the
water body is being contaminated by what
type of source?
2:
A water sample reveals that the following
chemical contaminates where found in it
(Copper and ph value 4.5). Based on this yo
can conclude that the water body is being
contaminated by what type of source?
Lecture Quiz
1. A water sample reveals that the following
chemical contaminates where found in it
(Phosphates, Nitrates, and Sulfides).
Source - SEWAGE
2. A water sample reveals that the following
chemical contaminates where found in it
(Copper and ph value 4.5).
Source - INDUSTRIAL/HAZARD WASTE
BIOLOGICAL CONTAMINATES
FACT -
Biological contamination of
surface water is more
common than chemical
contamination.
FACT -
Biological contaminates
cause more illnesses than
a chemical contaminate.
Protozoa: Single cell
organisms.
Types
1. Plantlike (Autotrophs)
2. Animal (Heterotrophs)
Plantlike Protozoa (Autotrophic). T hey can
produce their own food like a land plant
because they have the chemical, chlorophyll
that can convert sunlight, water, and carbon
dioxide into glucose sugar.
Euglena
Volvox: A fresh water algae that form
into a spherical colony.
Algae
 Algae bloom = rapid growth of algae
in a surface water body like an ocean,
lake, or pond due to overabundance
of food (nutrients).
Alga Bloom (The Series of
Effects)
 A thick layer of algae form near the surface
blocking sunlight from reaching plants below.
This will cause these plants to die and sink to
the bottom of the water source.
 Decomposers (aerobatic bacteria) breakdown
the dead organism and begin to overpopulate
using up the dissolved oxygen (DO).
Alga Bloom
(The Series of Effects)
Fish, crustaceans, and shellfish
suffer due to oxygen deprivation
and eventually will die from
suffocation if they remain in the
area of the alga bloom..
Alga bloom on the Colorado
River
Dead fish from an ocean alga bloom
(Red Tide).
Animal Protozoa (Heterotroph):
1. Amoeba:
*
A shapeless one-celled mass.
*
Most amoeba are not harmful to
humans except the Dysentery
Amoeba.
*
This amoeba carries the
disease dysentery which
causes diarrhea and vomiting.
The disease is transmitted
through feces material that
was in the water or food.
Amoeba
2. Paramecium
A single cell protozoa with cilia (hairlike) which they use for locomotion.
Plasm odium(D)
Paramecium
causes the disease malaria and is
transmitted from the bite of a
mosquito.
Paramecium
Bacteria versus Virus
Bacteria
 E. Coli: A bacteria found in
the intestines of animals and
humans.
 The presence of
E Coli in water is a strong
indication of recent sewage or
animal waste contamination.
Viruses
The Cycle of a Virus
How the West Nile Virus is
transferred
Viruses
West Nile Virus
- The virus is carried by a species of
mosquitoes.
-Affects people with weak immune systems
•Infants
•Elderly
•People suffering from illness