Sectors of the Indian Economy - Class 10 Study Notes pdf
Mackenzie Reparian Zone
1. The Barn OwlThe Barn Owl
Tyto albaTyto alba
MacKenzie McDowell
Biology 1,
period 4
2. NicheNiche
barn owl,barn owl, Tyto albaTyto alba
The common barn can and will live
anywhere that there is trees, small
rodents and insects, and good shelter.
They live on every continent in the world
except Antarctica. In America they range
all the way up to British Columbia and all
the way down to South America.
The barn owl is mainly dependent on small
rodents as their main food source. Which
are dependent on lush plants. They also can
eat insects.
This owl doesn’t have a certain breeding
season and they usually only live through
one or two breedings. Owls usually only
have one breeding partner in their lives
and they stay together to death. They
usually breed once a year and have
anywhere from 2 to 18 eggs, but the
average is 4 or 5. the female hardly ever
leaves her eggs so the male brings her
food. She usually rests on the eggs waiting
for them to hatch for about 29 to 35 days.
Then they are fed up to 5 weeks, they
learn to fly at about 6 weeks and return to
roost at the nest until they are about 7 or
8 weeks old. They female and male both
care for the brood while they are at the
nest up to 5 or 6 weeks.
3. Niche
Continued…
The common barn owl can live
anywhere in the whole world except
Antarctica. They can live in humid
conditions and areas with no or little
humidity at all. They can live in
deserts which have hardly ever if any
rain and usually have extremely low
humidity. They can also live in areas
where there is marsh and farm lands.
These areas tend to have higher
humidity.
They have also been introduced to
oceanic areas and around shore lines.
They are usually found at lower
elevations and in valleys. They can
live in hollow trees, church steeples,
barns, cavities in cliffs, cave etc.
Proper nesting areas as listed above
can and do limit the amount of barn
owls in a certain area. This helps
control then food consumption and
competition
4. Food Chain of the Barn OwlFood Chain of the Barn Owl
First there is grass ( producer), then the vole eats the grass
( herbivore) , then the owl (carnivore) eats the vole as prey, then
the red kite ( carnivore) eats the owl.
Producer
Autotrop
h
Primary Consumer
Herbivore
Secondary Consumer
Carnivore
Tertiary Consumer
carnivore
5. Food Web of the barn owlFood Web of the barn owl
Draw and explain a possible food web for your
researched animal. Include a description of the trophic
level(s) in which each organism is found.
6. Stream Quality Data & AnalysisStream Quality Data & Analysis
0
50
100
150
200
250
No. of
organisms
Class I
Class II
Class III
This is a high quality stream.
Since there is a high number of
class one organisms to
everything else then that means
that the stream is extremely
healthy.
The stream helps the barn owl
get food because the smaller
animals that it preys on will eat
the creatures in the stream.
That allows my owl to have food
and the smaller organisms.
7. Water Testing Data & AnalysisWater Testing Data & Analysis
0
2
4
6
8
10
12
Nitrate
Oxygen
pH Phosphates
Stream
Marsh
Mine
Having a high nitrate and phosphate is bad
for the water because that allows more
plants to grow that can overrun the area of
stream water.
The ideal levers for powdermill are that ph
should be 7. the phosphates and nitrates
should be low. The oxygen in the water should
be ideally above 10 ppm.
The marsh water would be okay for the
organisms my owl preys on but not the mine
area because the smaller insects that the
prey of my owl feed on would not be able to
survive so then my owl would not have food
and would die.
The water should be below 70 degrees
Fahrenheit and the water should be clear as
to not clog the fishes gills and the organisms
can cling to the rocks. Some animals cannot
stay in waters that are above 70 degrees.
This keeps certain bad organisms away and
good organisms there in the stream to help
provide nourishment to my owl and it’s prey.
8. Positive and Negative FactorsPositive and Negative Factors
•. The current stream conditions help to provide the barn owl to be able to
eat and consume the smaller organisms that feed off of the small
organisms that live in the stream. If someone were to block the stream
that would drive away the animals and then my owl would not be able to
survive without the smaller creatures that eat the ones in the stream.
•Some factors that effect the riparian zone are abandoned mine drainage
(AMD), and farmland run off. These can pollute streams and drop the pH
level to levels that cannot support certain important life. Farmland run
off can get into the streams and then pollute the water and make plants
grow too fast and then they can kill off organisms under the plants and
other life that robs the water of oxygen when they decompose.
9. ConclusionConclusion
•Owls and their life span.
•Owl only have one breeding and life partner through their short
lives. They only usually have one or two babies. They can only
live through one breeding season. They usually very rarely live
through two. Owl babies take a lot of care from both parents.
Barn owls do not live very long. Usually only about ten months
and some live to be older but not much longer.
• An owls hunting techniques would be a topic that would be
nice to investigate more because of the way they catch their prey
so quietly. Their body structure and wings would be another
great topic.
