Distrubution and abundance

Question 1

What is diversity?

Answer 1

Diversity is the number of diffrent species, ecological niches, or genetic variation

Question 2

What is population and how is it measured?

Answer 2

All members of a species living in a specific area at a specific time; Distribution and abundance

Question 3

What is Distribution and abundance?

Answer 3

Distribution is the geographic range of a species and habitat
Abundance is the total number of organsims in a population or throughout the whole entire geographic range of species

Question 4

What are geographical limitations for distribution of a species?

Answer 4

Abiotic and Biotic factors and habitat

Question 5

What are the three dispersal patterns in distrubution at a very local level?

Answer 5

Clumped, Random,Uniform

Question 6

Why do species be distributed clumped

Answer 6

.More likely to hunt down prey as pack
.It is a safer in numbers
.Reproductive success is more likely to mate in groups
Growth in microhabitats where its the most favourble requirements

Question 7

How might uniform distriubtion happen possibily?

Answer 7

From maybe direct interactions between indiviuduals in the population

(Territoriality)

Question 8

What is territoriality?

Answer 8

the defense of a bounded physical space against encroachment by other individuals.

Question 9

What is biomass and why is it used?

Answer 9

Biomass is the measuremtn of the amount of organic matter for example kg/m^2
This is used for measuring the size of a population where you cant specifically count them one by one.

Question 10

What is population density?

Answer 10

Density of population is the number of individulas per unit area or volume

Question 11

What are two methods to measure distrubtion and abundance?

Answer 11

Quadrants and Transects

Question 12

What are the two population growth and decrease factors?

Answer 12

Growth in population: Birth(Natality) and immigration
Decrease in population: Death and Emmigration

Question 13

What is exponential growth?

Answer 13

It is a rapid population growth, shown in J shaped curve in a graph

Question 14

What is limiting factors?

Answer 14

Are factors that limit population growth, unabling the chance for an organism to survive and reproduce

Question 15

What is Tolerance Limits?

Answer 15

The maximun and minimum a organism can survive in an enviroments range of conditions

Question 16

What is optimum range in tolerance range

Answer 16

Depending on season or life stage, it is the narrow mid section that allows the organism to function at its best
Therefore organisms will be most abundant in the areas where the abiotic factors are closest to optimum range

Question 17

What is physiological stress in tolerance range

Answer 17

It is where development is delayed and survial and reproduction rate is low.

Question 18

Yes/no

Can sample dats be used to construct models of species interactions?

Answer 18

Yes

Question 19

Yes/no

Sampling cant help us evaluate conservation management?

Answer 19

No

It can

Question 20

yes/no

Is sampling data is unbiased

Answer 20

yes

Question 21

Yes/no

Distributions of species may change over time?

Answer 21

Yes

Question 22

List

What should you include in a exponential growth graph??

Answer 22

• Title for graph
• The population size on left hand
• Time on bottom
• The units
• Connecting dots

Question 23

Yes/no

Species that experience exponential growth will keep going?

Answer 23

No, the species most likely have a short generation time and give a rise to large number of offspring. Like insects or bacteria or weed

Question 24

Is it normal for animals and plants to have exponential growth? If yes explain.

Answer 24

It is when conditions are favourable and resources are abundant or for the seasonal breeding.

Question 25

What is population explosion?

Answer 25

When favourble conditions continue for a population to keep on growing

Question 26

Only Definition

What is Density-independant factors

Answer 26

They affect the population size regardless of the density of the population.

Question 27

Only definiton

What is Density-dependant factors

Answer 27

It affects population size by increasing or decreasing the density.

Question 28

List some density dependant factors?

Answer 28

1. Competition for resources
2. Predation
3. Crowding
4. Parasitism
5. Infectious disease

Question 29

List some density-independant factors?

Answer 29

These are things like Tolerance range of a species
Environmental changes – bushfires, drought, flood, cyclone, pollution etc

Question 30

What is a carrying capactity for a species?

Answer 30

The maximum population sustained by an environment when the number of birth rates and death rates cancel out. This occurs by denisty-dependant factors, the oraganism for example compete for same shit