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Community Ecology 56.4 & 56.5
Symbiosis occurs when two or more species interact in more-or-less parmanent associations (56.4). Communities have a tendency to change over time in a process called succession (56.5).
14
Biology
11th Grade
12/15/2013

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Term
How does commensalism affect two different species?
Definition
Commensalism benefits one species and does not help or hurt other species.
Term
How does mutualism affect two different species?
Definition
Mutualism is a relationship in which both species benefit.
Term
What type of relationship is parasitism?
Definition
Parasitism is a relationship in which the prey or host is harmed; often fatally.
Term
In nature, how many interactions occur at the same time?
Definition
In nature more than one interaction usually occurs at the same time.
Term
When do indirect effects occur?
Definition
Indirect effects can occur when one member of two interacting species is affected by a third species.
Term
How can keystone species maintain a more diverse community?
Definition
Keystone species can maintain a more diverse community by reducing competition between species or altering the environment to create new habitats.
Term
When does succession occur?
Definition
Succession occurs as species alter their habitat and resources, to thus facilitating other species.
Term
How does primary succession begin?
Definition
Primary succession begins with a barren, lifeless substrate.
Term
When does secondary succession occur?
Definition
Secondary succession occurs after an existing community is disturbed.
Term
Successional dynamics include…
Definition
Successional dynamics include tolerance, facilitation, and inhibition.
Term
As succession occurs species richness _________ so as to become stable or _______ in time if K-selected species out-compete other species.
Definition
As succession occurs species richness increases so as to become stable or decline in time if K-selected species out-compete other species.
Term
What is the relationship between animal species succession and plant succession?
Definition
Animal species succession changes with plant succession, and, in turn, animal communities may affect plant succession.
Term
Community composition changes as a result of _____ and ______ disturbances that “reset” succession.
Definition
Community composition changes as a result of local an global disturbances that "reset" succession.
Term
How do intermediate levels of disturbance affect species richness?
Definition
Intermediate levels of disturbance may maximize species richness.
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