ENV 201 Ecosystems Population Terms, Concepts -Examination &Practical Info
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Population explosion refers to... | biotic potential (Wright, chapter 4)
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| Compare J-Curve vs S-Curve && provide specific distinction | J curve demonstrates population growth under normal conditions && S curve shows population growth at equilibrium
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| Balance of births and deaths produces.... | Population Equilibrium
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| Biotic potential | The Number of Offspring that species may produce under ideal conditions (Wright, Chapter 3,4)
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| Changes in moisture, salinity, pH, lack of nutrients, fires, and light produce a phenomena commonly referred as... | environmental resistance
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| Factors related to biotic potential and recruitment commonly refers to... | reproductive strategies
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| Top 8 factors of environmental resistance important to evaluate practical applications... | 1. lack of nutrients
2. lack of water
3. lack of suitable habitat
4. adverse weather conditions
5. predators
6. disease
7. parasites
8. competition
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| Rapid decline in species population.... | Threatened as defined by US Fish And Wildlife Service
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| If the population is near 'the critical number' species are... | Endangered as defined by US Fish And Wildlife Service
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| Transition from one biotic community to another refers to as... | ecological succession (Wright, Chapter 1 &4)
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| The way parasitic organisms act on population level | parasitic organisms act as predators in a density dependent manner. As population density of the organisms increases, parasites and their vectors easily find new hosts causing higher mortality.
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| Assemblage of species continuing on in space and time.... | climax ecosystem
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| What are the main tenets of primary succession within the ecosystem? | Primary succession examines gradual establishment through a series of stages, or a climax ecosystem in an area that has not been occupied before. (Wright, Chapter 4)
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| What are the main tenets of secondary succession within the ecosystem? | The reestablishment through a series of stages, or a climax ecosystem in an area from which it was previously cleared (Wright, Chapter 4)
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| What is the solid practical example of secondary succession in the forest ecosystem? | The hardwood species growing up underneath and displace pines in Eastern Maryland.
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