The reading and the lecture are both about decrease in sea otter population. The author provides three theories to prove that environmental pollution is the most likely drawback of sea otter population decrease. In contrary, the professor is not convinced of this and cast doubts on each of the theories presented in the reading. This lecturer is of the opinion that based on the accurate evidence and observations, predation can motive this population decrease.
To begin with, the author argues that the existence of many sources of environmental pollution in Alaskan coast such as oil rigs alongside with experimenting water sample that reveals high level of chemical pollution authenticate the pollution theory. This argument is challenged by the lecturer. According to the professor, if this theory was the main reason of the population reduction, many dead bodies of these creatures would be washing up in beach; whereas the predators are unable to leave such an evidence behind. Furthermore, the lecturer asserts that finding no evidence of dead sea otter support the theory of predation.
Secondly, the writer disputes that, the decline in other mammals such as sea lions can be delineated by whatever that is responsible for sea otter’s death. Moreover, it is stated in the article that predator like Orca hunts large prey such as whales. In contrast, the lecturer stance is that other mammals’ death is, again, has something to do with predation. The professor elaborates on this idea by bringing up the point that when human hunts lead to whale disappear, sea otter change its diet and eats mammals. This food chain confirms the population decrease.
Finally, the author averts that uneven population reduction certify the environmental cause. To delineate, ocean currents and other natural factors accounts for the population reduction. The lecturer opposes this notion by asserting that this phenomenon is happened because of the predators’ accessibility to sea otters. It puts forth to the idea that Orca has no access to shallow or rocky parts of the ocean; hence, the population of otters fluctuate or decrease in specific parts.
The reading and the lecture are both about decrease in
sea
otter
population
. The author provides three
theories
to prove that environmental
pollution
is the most likely drawback of
sea
otter
population
decrease. In contrary, the professor is not convinced of this and cast doubts on each of the
theories
presented in the reading. This
lecturer
is of the opinion that based on the accurate evidence and observations, predation can motive this
population
decrease.
To
begin
with, the author argues that the existence of
many
sources of environmental
pollution
in Alaskan coast such as oil rigs alongside with experimenting water sample that reveals high level of chemical
pollution
authenticate the
pollution
theory
. This argument
is challenged
by the
lecturer
. According to the professor, if this
theory
was the main reason of the
population
reduction,
many
dead bodies of these creatures would be washing up in beach; whereas the predators are unable to
leave
such an evidence behind.
Furthermore
, the
lecturer
asserts that finding no evidence of dead
sea
otter support the
theory
of predation.
Secondly
, the writer disputes that, the decline in other mammals such as
sea
lions can
be delineated
by whatever
that is
responsible for
sea
otter’s death.
Moreover
, it
is stated
in the article that predator like Orca hunts large prey such as whales.
In contrast
, the
lecturer
stance is that other mammals’ death is, again, has something to do with predation. The professor elaborates on this
idea
by bringing up the point that when human hunts lead to whale disappear,
sea
otter
change
its diet and eats mammals. This food chain confirms the
population
decrease.
Finally
, the author averts that uneven
population
reduction certify the environmental cause. To delineate, ocean currents and other natural factors accounts for the
population
reduction. The
lecturer
opposes this notion by asserting that this phenomenon
is happened
because
of the predators’ accessibility to
sea
otters. It puts forth to the
idea
that Orca has no access to shallow or rocky parts of the ocean;
hence
, the
population
of otters fluctuate or decrease in specific parts.