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ENV SCIENCE
ENV 201 Ecosystems Population Terms, Concepts -Examination &Practical Info
Question | Answer |
---|---|
Population explosion refers to... | biotic potential (Wright, chapter 4) |
Compare J-Curve vs S-Curve && provide specific distinction | J curve demonstrates population growth under normal conditions && S curve shows population growth at equilibrium |
Balance of births and deaths produces.... | Population Equilibrium |
Biotic potential | The Number of Offspring that species may produce under ideal conditions (Wright, Chapter 3,4) |
Changes in moisture, salinity, pH, lack of nutrients, fires, and light produce a phenomena commonly referred as... | environmental resistance |
Factors related to biotic potential and recruitment commonly refers to... | reproductive strategies |
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 |
Rapid decline in species population.... | Threatened as defined by US Fish And Wildlife Service |
If the population is near 'the critical number' species are... | Endangered as defined by US Fish And Wildlife Service |
Transition from one biotic community to another refers to as... | ecological succession (Wright, Chapter 1 &4) |
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. |
Assemblage of species continuing on in space and time.... | climax ecosystem |
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) |
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) |
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. |