Zoo Exam 4
- University of Wisconsin - Madison
- Zoology 101
- Thoma, Porter, Orrock
- Zoo Exam 4
Last Modified: 2011-07-02
Related Textbooks:Biology with MasteringBiology™ (8th Edition)
-gradient species change
2. Change of species in time can arise due to natural selection
2. Organisms produce more offspring than can survive
2. Over time, favorable traits accumulate in the population
->Evolution and Adaptations Arise
EX. Ability to locate mates, courtship behaviors, ornaments
-mostly via polyploidy
-5 events in earth's history (loss of 50% or more of species)
-often characterized by:
-big environmental change (ice age)
-catastrophic events (asteroid strikes. volcanic activity)
-any interaction w/ another species
-> distinct climate regions
-resource distribution, behavior (predation risk, foraging, mating)
-social interactions (territoriality, competition)
-in the absence of strong interactions
-Predation (including herbivory)
-Symbiosis (parasitism, disease)
carnivory and herbivory
parasite lives in or on host (often not lethal)
pathogens- disease causing organisms
not very common
both species can survive w/out each other
relationship often obligatory
-endosymbionts- species living inside its host
occurs when 2 or more species share the same limited resource
-areas of high biodiversity
-species or groups of species of special interest
-protect important ecosystem services and reduce extinction
-light energy-->chemical energy
-releasing chemical energy to do work
air quality regulation
Recreation and ecotourism
2. Changes have brought gains but at growing costs that threaten achievement of development goals.
3. Degradation of ecosystems could grow worse but can be reversed.
4. Workable solutions will require significant changes in policy.
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