B19 Populations In Ecosystems

Question 1

Define community

Answer 1

All the different species that live in 1 area and interact with each other

Question 2

Define ecosystem

Answer 2

All the living organisms found in 1 area, combined with non-living aspects of their environment. Can vary from very large to very small

Question 3

Describe biotic and abiotic factor, giving examples

Answer 3

Biotic = living features of an ecosystem e.g. predators, disease

Abiotic = non-living features of an ecosystem e.g. light, temperature.

Question 4

Define habitat

Answer 4

The place where an organism lives within an ecosystem

Question 5

Define a niche

Answer 5

The role of a species within its habitat, consisting of both its biotic interactions e.g. what it eats, and abiotic interactions e.g. time of day it is active

Question 6

What is meant by caring capacity

Answer 6

The maximum size of population an ecosystem can support

Question 7

Name 4 abiotic factors that affect population growth

Answer 7

1. Temperature
2. Light
3. pH
4. Water / humidity

Question 8

What is meant by intraspecific and interspecific competition

Answer 8

Intraspecific = competition between organisms of the same species

Interspecific = competition between organisms of different species