Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

OCR GATEWAY GCSE BIOLOGY > B4 Community level systems > Flashcards

B4 Community level systems Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route A flashcards AP® Biology flashcards GCSE Geography - AQA flashcards Biology 101 flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route B flashcards
1
Q

What are ecosystems?

A

-Communities of organisms (biotic) interacting with the abiotic factors of their environment.
-Lots of different materials are cycled through an ecosystem.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a community?

A

All of the populations of different species that are living in a habitat together.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a population?

A

All the individuals from one species living in a habitat.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the difference between biotic and abiotic?

A

Biotic means living and abiotic means non-living.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What abiotic factors affect communities?

A

-Light intensity.
-Temperature.
-Moisture levels.
-Soil PH.
-Soil mineral levels.
-Direction and intensity of wind.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does light intensity affect a community?

A

-Light is required for photosynthesis and the rate of photosynthesis impacts the rate of a plant’s growth.
-Plants can be food sources / shelter for many organisms.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does temperature affect a community?

A

-Impacts rate of photosynthesis.
-Animals and plants have optimum temperatures.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How do moisture levels affect a community?

A

Plants and animals need water to survive.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How does soil PH affect a community?

A

Different plants will grow best in different soil acidities.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why do soil mineral levels affect a community?

A

Plants require lots of mineral ions to grow healthily.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why do wind direction and intensity affect a community?

A

Wind speed affects rates of transpiration and photosynthesis in plants.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What biotic factors affect communities?

A

-Food availability.
-New predators.
-New pathogens.
-Competition.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why does food ability affect a community?

A

Organisms require food to survive and reproduce therefore populations thrive when there is a high food availability.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why do new predators affect a community?

A

Not enough prey for the predators to feed on without wiping out a whole prey population therefore new predators disrupt balance in communities.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why do new pathogens affect a community?

A

Populations have no immunity / resistance to new diseases which can lead to increased deaths unless resistance evolves.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Why does competition affect a community?

A

If some organisms are better at acquiring the shared resources than others, they will out compete the less adapted organisms until there’s no longer enough of them left to breed.

17
Q

What is competition?

A

When different organisms compete for same resources in an ecosystem.

18
Q

Why can competition limit population / community size?

A

-Limits population size if it occurs within a species.
-Limits community size if it occurs between different species.

19
Q

What may plants compete for?

A

-Light.
-Space.
-Water.
-Mineral ions.

20
Q

What may animals compete for?

A

-Space.
-Food.
-Water.
-Mating partners.

21
Q

What is interdependence?

A

When the survival of some organisms within a community is dependent on other species within the same community.

22
Q

What are examples of interactions that can create interdependence within a community?

A

-Predation.
-Mutualism.
-Parasitism.
-(Food, shelter and reproduction).

23
Q

What is predation?

A

Biological relationship in which a member of one species consumes a member of another species.

24
Q

What is mutualism?

A

Interaction between 2 organisms where both benefit as a result of their relationship.

25
Q

What is parasitism?

A

Interaction between 2 organisms where only the parasite benefits and not the host.

26
Q

Why can the removal / addition of species within a community greatly impact other populations?

A

Changes the prey / predator numbers.

27
Q

What is a stable community? And why is it difficult to replace lost populations in one?

A

When all the biotic and abiotic factors of a community are in balance so population sizes remain roughly constant. This means that if populations are lost, they are hard to replace.

28
Q

Why are mineral ions and water constantly being recycled through abiotic and biotic parts of an environment?

A

OCR GATEWAY GCSE BIOLOGY (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions