ecosystem

Question 1

definition of population

Answer 1

All organisms of one species in the habitat

Question 2

Definition of community

Answer 2

organisms of different species, living in a habitat 

Question 3

what is interdependence?

Answer 3

Species depend on other species in some way to survive

Question 4

What are abiotic features?

Answer 4

Nonliving parts of the environment that affect other organisms

Question 5

What are biotic features?

Answer 5

Living factors that affect other organisms

Question 6

What are some biotic features?

Answer 6

Predation
Amount of disease
Availability of food
Competition (resources/habitat )

Question 7

What are abiotic features in an environment?

Answer 7

light intensity
CO2, concentration,
Mineral/pH of soil,
Wind, intensity,
Temperature 

Question 8

What is a habitat?

Answer 8

Where organisms live

Question 9

what are quadrants used to measure?

Answer 9

Abundance

Question 10

what are transects used to measure?

Answer 10

Change in species distribution in an area
Change in species across a gradient

Question 11

first two steps when using quadrats

Answer 11

please tape measure on field and form a large grid

Use a random number generator to generate coordinates to place quadrats

Question 12

step three and four, when using quadrats

Answer 12

Place quadrats at specific coordinates

calculate me number of organisms per metre^2

Question 13

How do you calculate population size?

Answer 13

mean, number of organisms, per m^2
x area of the field

Question 14

first two steps when using a transact to calculate distribution change

Answer 14

layout, straight line

Place quadrats at regular intervals along the line

Question 15

step three and four of transect

Answer 15

Count numbers of species in each quadrant
Repeat all steps at a new transect line
(lines have to be parallel) 

Question 16

Why do we repeat the steps when using a transects to calculate distribution?

Answer 16

Allows data to representative of the area

Question 17

Four parts of the food chain

Answer 17

Producer
Primary consumer
Secondary consumer
Tertiary consumer

Question 18

What are producers always

Answer 18

A photo synthetic organism

Question 19

What are most primary consumers?

Answer 19

Herbivores

Question 20

what are most tertiary consumers

Answer 20

Carnivores

Question 21

What happens as energy is passed down the chain

Answer 21

Most of it is lost

Question 22

What are trophic levels?

Answer 22

Different levels of food chain

Question 23

What always is trophic level one?

Answer 23

producers 

Question 24

why are there normally only 4 to 5 trophic levels?

Answer 24

Not enough energy to sustain organisms in higher trophic levels

Question 25

Examples of decomposers

Answer 25

Fungi/bacteria

Question 26

example of a detrivore

Answer 26

 worm

Question 27

what do decomposers and detrivores do in the environment?

Answer 27

decompose, dead plants and animal matter into the environment 

Question 28

why are decomposers and detritivores important to the environment

Answer 28

they recycle nutrients from animal and plants back into ground for producers

Question 29

why is only 10% of biomass is passed downfood chains

Answer 29

organisms don’t eat every part of the organism its consuming

feel that they do eat might not be absorbed as they can’t break it down so it’s egested as faeces

most of the nutrients that animals absorb are used to release energy through respiration so biomass gets released as waste products rather than being stored within the organism


Question 30

How do you calculate efficiency of biomass transfer?

Answer 30

biomass transferred to next level/ biomass that was available at previous level
x answer by 100