Population & Communities Definitions

?
Population
Number of individuals of the same species living
in a defined area at a particular time
1 of 17
Abiotic factors
Factors in the chemical
and physical environment
2 of 17
Biotic factors
The effect of other organisms of the same or different species
3 of 17
Environmental Resistance
The sum total of biotic and abiotic factors which restricts population growth, preventing it from reaching its biotic potential
4 of 17
Biotic Potential
The reproductive rate of a population under optimum environmental conditions, with unlimited resources
5 of 17
Pioneer species
The first species to arrive and establish in a new environment
6 of 17
Carrying Capacity
The maximum population a particular environment can support
7 of 17
Community
The habitat and interactions of various populations within it
8 of 17
Ecological Niche
The role an organism plays within an ecosystem
9 of 17
Pest
any organism that causes economic damage
10 of 17
Competition
When different organisms are competing for the same resource eg. space, nutrients or light
There are 2 types: Intra- and Inter-Specific
11 of 17
Mutualism
+/+
an interaction where both species benefit
12 of 17
Symbiosis
+/+
a specialised form of mutualism, which involves some form of physiological interdependence between species
the interaction is necessary for both
13 of 17
Commensalism
+/=
one species benefits, whilst the other is unaffected
eg. orchids growing on branches, or burdock seeds attaching to animals for seed dispersal
14 of 17
Grazing
+/~
a feeding relationship between a producer and consumer
it benefits both to an extent
15 of 17
Predation
+/-
one species eats another
16 of 17
Parasitism
+/-
a specialised form of predation
where the parasite gains at the expense of the host, but does not kill it
17 of 17

Other cards in this set

Card 2

Front

Factors in the chemical
and physical environment

Back

Abiotic factors

Card 3

Front

The effect of other organisms of the same or different species

Back

Preview of the back of card 3

Card 4

Front

The sum total of biotic and abiotic factors which restricts population growth, preventing it from reaching its biotic potential

Back

Preview of the back of card 4

Card 5

Front

The reproductive rate of a population under optimum environmental conditions, with unlimited resources

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Ecology, ecosystems and environmental biology resources »