Factors affecting populations
Community interactions
Energy flow in an ecosystem
Ecological Succession and ELFs
Vocabulary
200
Living factors that affect populations
What are biotic factors
200
+/+ relationship
What is mutualism
200
This bottom trophic level of the pyramid of production is occupied by...
What are producers
200
A temporary change in environmental conditions that causes a pronounced change in an ecosystem.
What is a disturbance
200
These limiting factors are dependent on the size of the population in an area.
What are density dependent factors
400
Non-living factors that affect populations
What are abiotic factors
400
+/0 relationship where one benefits and the other is neither hurt nor helped. 
What is commensalism
400
This level of the trophic structure relies on energy from the primary consumer level and the producer level.
What is the secondary consumer level.
400
This essential life function can be aerobic or anaerobic
What is respiration
400
These are species that are first to colonize an area after a disturbance
What are pioneer species
600
This image is representative of which type of population growth? 
What is logistic growth
600
This interaction would be represented by a +/- where the population benefitting uses the host to survive.
What is parasitism
600
If there is 20,000,000kg of biomass at the producer level, how much would be available for secondary consumers?
What is 200,000kg
600
This type of succession start with bare rock
What is primary succession
600
This occurs when a change in one level of the trophic structure affects all other levels
What is trophic cascade
800
Carrying capacity is determined by these factors
What are limiting factors
800
+/-
What is Herbivory
800
These organisms chemically break down dead and decaying material so that producers can use these nutrients.
What are decomposers.
800
This type of ecological succession would occur as a result of the disturbance shown below:
What is secondary succession
800
A group of species interacting with other species in a given area. 
What is a community
1000
The following graph represents this growth pattern often seen in nature in a predator prey relationship. 
What is a boom and bust pattern
1000
If two niches overlap this interaction is likely to occur....
What is competition
1000
There is 5,000kg of biomass at the quaternary consumer level. This means that the producers must have created this amount of biomass.
What is 50,000,000kg
1000
Correctly identify 6 of the 8 essential life functions
What are synthesis, respiration, excretion, growth, transport, nutrition, reproduction and regulation
1000
Although small in number these species have a profound affect on the ecosystem they are found in
What is a keystone species