How many times did the reindeer population increase between 1945 and 1963? Abstract: Reindeer (Rangifer tarandus), introduced to St. Matthew Island in 1944, increased from 29 animals at that time to
6,000
in the summer of 1963 and underwent a crash die-off the following winter to less than 50 animals.
What is the decrease in the reindeer population decrease between 1963 and 1966?
In the late winter of 1963-64, in association with extreme snow accumulation, virtually the entire population of 6,000 reindeer died
of starvation
. With one known exception, all of the surviving reindeer (42 in 1966) were females.
Did the reindeer exceed the carrying capacity of the environment?
In the tundra, where both reindeer and wolves live,
the numbers of reindeer herds do not exceed the carrying capacity of their environment
. In 1944, the United States Coast Guard transported 29 reindeer to St. … Matthew Island has the typical tundra climate, but no wolves live there.
Why did the reindeer grow at this rate?
World War II ended soon after the reindeer were introduced, so none of them were ever actually hunted by the Coast Guard officers.
The island was abandoned by humans
, and the deer were left without any predators. In these conditions, their population thrived.
What was the size of the reindeer population in 1911?
a) In 1911 the population was
25 reindeer
.
Which change would cause an increase in the size of a population?
There are three components of change:
births, deaths
, and migration. The change in the population from births and deaths is often combined and referred to as natural increase or natural change. Populations grow or shrink depending on if they gain people faster than they lose them.
What was the reason the reindeer population eventually died out?
A scientific study attributed
the population crash to the limited food supply in interaction with climatic factors
(the winter of 1963–64 was exceptionally severe in the region). By the 1980s, the reindeer population had completely died out. Environmentalists see this as an issue of overpopulation.
Why did the reindeer population crash quizlet?
-1910 8 caribou introduced population went up to 2000 then when back down and eventually became extinct in 1950. – Spike caused by lack of predators, less competition for food with other species, better shelter. Crashed
because it reached carrying capacity, or disease, or humans hunting the, etc.
.
Which two factors could increase the carrying capacity of an ecosystem?
Carrying capacity can be increased by
the amount of food available
, the local extinction of a competitor, an increase in species fertility, a decrease in predation, an increase in the amount of habitat available for use, and adaptations to the environment, such as resistance to disease or adaptations that serve to …
Why is it bad to for a population to overshoot the carrying capacity of an ecosystem?
If a population exceeds carrying capacity,
the ecosystem may become unsuitable for the species to survive
. If the population exceeds the carrying capacity for a long period of time, resources may be completely depleted. Populations may die off if all of the resources are exhausted.
What might account for the tremendous increase in the population of reindeer between 1930 and 1938?
(2 points) What might account for the tremendous increase in the population of reindeer between 1930 and 1938, as compared with the rate of growth during the first years the reindeer were on the island? This was probably a great increase
because their resources started increasing
.
What are the 4 factors that influence population size?
Population growth is based on four fundamental factors:
birth rate, death rate, immigration, and emigration
.
Which Two factors determine the size of a population?
The two main factors affecting population growth are
the birth rate (b) and death rate (d)
. Population growth may also be affected by people coming into the population from somewhere else (immigration, i) or leaving the population for another area (emigration, e).
What are the five factors that affect population?
- Economic development. …
- Education. …
- Quality of children. …
- Welfare payments/State pensions. …
- Social and cultural factors. …
- Availability of family planning. …
- Female labour market participation. …
- Death rates – Level of medical provision.
What was the primary cause of the population crash of reindeer on St Matthew’s Island?
Matthew’s reindeer herd and found that
an extreme winter probably pushed the stressed animals to their deaths
. The story began in August 1944, when the U.S. Coast Guard corralled 29 Nunivak Island reindeer on a barge and floated the animals north to St.
