Population Size And Ecosytems

Question 1

Waht is meant by the term population?

Answer 1

A group of organisms of the same species that can interbreed and occupy a specific habitat

Question 2

Waht i meant by birth rate ?

Answer 2

The reproductive capacity (this is a biotic factor) of a population .ie.the number of new individuals derived form reproduction per unit time

Question 3

Waht mis meant by reproductive capacity

Answer 3

This is theoreticle number of offspring that could be produced by an individual which to then equated to a population based on the number of females in the population.

Question 4

Waht is immigration and emigration?

Answer 4

Imigration the is the movement of a specimens into a a population the same species

Emigration the movement of individuals out of a population

Question 5

Waht is an equilibrium species ?

Answer 5

They control their population through competition within a stable habitat . Thus curve for this is a sigmoid curve and is called the one step growth curve and is shown when a population is newly introduced to an area

Question 6

Waht is an equilibrium species

Answer 6

They control their population through competition within a stable habitat . Thus curve for this is a sigmoid curve and is called the one step growth curve and is shown when a population is newly introduced to an area

Question 7

Waht is a fugitive species

Answer 7

These are rally bad at competition and instead rely on large capacity for reproduction and dispersal to increase their population they invade a new environment rapidly eg algae colonising a bare rock

Question 8

Waht strategy does an equilibrium species use for population growth

Answer 8

Through completions within a stable habitat

Question 9

How does a fugitive species control the growth in ther population

Answer 9

Poor at competiton so rely on large capacity for reproduction and dispersal to increased their numbers

Question 10

Waht are on the axis of the one step growth cure and describe its shape

Answer 10

It’s and shaped sigmoid curve
And the the x-axis is time
The y-axis is number of orgasnisms

Question 11

Why is an ecosystem dynamic

Answer 11

Becaue the factors that affect an ecosystem (eg) biological cycles ,intensity of energy ,the arrival of new species ,climate change and changing habitats due to succession are constantly changing

Question 12

What i the size of a population determined by at any specific time ?

Answer 12

Birth rate : this it the the reproductive capacity (ie) the number of new individuals derived by reproductive per unit time
Death rate
Immigration: the movement of individuals into a a population

Emigration : the movement of individuals out of a population