Populations
Species Interactions
Trophic Levels & Food Webs
Concept Maps
Trophic Cascades
100
A living thing that affects a population
What is a biotic factor?
100
When a frog eats a fly
What is predation?
100
The first trophic level
What are producers?
100
One thing included in a concept map that's not shown on a food web
What are abiotic factors, indirect effects, or species interactions?
100
The type of effect that secondary consumers have on producers
What is indirect positive effect?
200
Examples are weather, climate, and natural disasters
What are abiotic factors or density-independent factors?
200
When a hummingbird helps pollinate a flower while feeding on nectar
What is mutualism?
200
The trophic level that eats primary consumers
What are secondary consumers?
200
The type of effect that prey have on a predator
What is a direct positive effect?
200
The keystone species in the otter, urchin, and kelp example
Kelp --> Urchin --> Otter
What is the otter?
300
The type of growth shown in the graph
What is logistic growth?
300
When a blue jay and robin both eat worms and seeds
What is competition?
300
The trophic level of the hawk
What is tertiary consumer?
300
The type of arrow and label used to show the effect of a host on a parasite
What is a solid arrow with a (+)?
300
A species that keeps an ecosystem in balance
What is a keystone species?
400
The type of population growth seen when resources are unlimited
What is exponential growth?
400
When a heartworm lives within the heart and lungs of a dog
What is parasitism?
400
Represented by arrows in a food web
What is the transfer of energy?
400
The effect of soil nutrients on the lizard
What is an indirect positive effect?
400
Can happen if a top predator is removed from an ecosystem
What is a trophic cascade?
500
A limiting factor that has a greater effect on larger populations
What is a density-dependent limiting factor?
500
When a remora fish stays under the shark's belly and catches food that the shark has left behind
What is commensalism?
500
The amount of energy that is transferred from one trophic level to another
What is 10%?
500
The species interaction represented in a concept map by a double-sided, dotted arrow, labeled with a (-)
What is competition?
500
The effect of the disappearance of the hawk population on the rabbit population
What is increase?