Transcript Unit 3 Part 3 b

Unit 4
Adaptations
Grasses, Shrubs and low plants
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Shallow roots
Fast reproduction
/ flowering cycle
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1-3 meters below the
surface the ground is
completely frozen
growing season is very
short, 1-2 months
Animals
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Hibernation
(Bears)
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Migration (Birds)
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Insulating
features
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They can sleep right though
the cold months under a
thick blanket of snow and
not freeze.
They can move further
south to warmer climates to
avoid the cold.
Some animals have extra
fur or fat to help hold in
heat so they don’t freeze.
Animals
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Camouflage
(snowshoe hare,
ptarmigan, bear)
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Feet (ptarmigan)
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Feet (snowshoe
hare / polar bear)
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Hides or protects them
from their predators.
Feet enlarge in the fall
for walking on snow
Snow shoe hare
develop a covering of
hair. Polar bear –
bristles.
Trees – Conifers (Evergreens)
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Needle-like leaves
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Thick bark
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Conical shape
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Less surface area on the
leaves means less
transpiration (Winter all
water is frozen).
The thicker the bark the
less water that will
escape.
Heavy snow during the
winter will fall off reliving
the pressure on the
branches.
Trees – Deciduous
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Shed their leaves
when winter comes.
(Birch, maple, aspen
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Since the water is
frozen during winter
they shed their leaves
so no water is lost via
transpiration.
Grasses
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Shallow roots
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Small water
requirement
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Little rain falls, doesn’t
seep far in the ground,
roots near the surface
will catch all the water.
Little water, they have
little need for water,
only once in a while.
Also small in size, so
they don’t need a lot
of water. .
Introduction of a new species?
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What could be the probable impact that:
the recent arrival of coyotes on the island of
Newfoundland may have on the local
ecosystem?
the introduction of snowshoe hare or even the
moose to the island of Newfoundland?
the introduction of chinch bugs when it arrived
through sods imported from mainland Canada?
Possible Effects ???
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Elimination/disruption of their food
sources/species.
Competition for food sources may cause decline
or endanger other native species that eat same
food source.
Diseases may be introduced causing decline or
disruption.
May cause interruption of decline in economic
activity related to lost/declining species.
Financial cost to subsequently control new
species.