Vocabulary
Effect on Populations
Population Density & Growth
Ecosystems
Potpourri
100
These are the living parts of an ecosystem.
What are biotic factors?
100
When natality is higher than mortality.
What is the population increases?
100
The term for this type of growth
What is exponential?
100
A single ecosystem may contain many of these - a term for the area in which organisms live.
What are habitats?
100
The term for when living things move into a population
What is immigration?
200
These is term for the nonliving things in an ecosystem
What are abiotic factors?
200
When emigration exceeds immigration.
What is the population decreases?
200
The population of turtles in an area that is 10m long and 12 m wide when direct observations show there are 2 in one square meter.
What is 240 turtles?
200
A volcanic eruption occurs in an area and wipes out nearly all living organisms in the local ecosystem. This is this type of limiting factor. (Hint! Density-dependent or density-independent)
What is a density-independent factor?
200
The number of offspring an organism can have over her lifetime under ideal conditions.
What is biotic potential?
300
All the different populations that live together in an area.
What is a community?
300
This is the effect on a monogamous population with an unbalanced sex ratio (male/female).
What is that reproduction/population declines?
300
You are observing a population that has a mortality rate of about 70% its first year and about 10% as young adults. This is the survivorship pattern.
What is type III?
300
These are 5 examples of abiotic factors
What are sunlight, water, oxygen, temperature, soil, etc...?
300
You're a field ecologist assigned to keeping track of the effect of a local pollutant on a species. This is the age structure diagram that would indicate the species is not doing well.
What is D?
400
Environmental factors that prevent a population from increasing
What are limiting factors?
400
Population growth % is determined by this formula.
(natality + immigration) - (mortality + emigration) /1000 * 10%
400
Exponential growth shown on a graph makes a _______ curve; logistic growth shows an ______ curve.
400
This is an organism's role in its habitat
What is its niche?
400
In an ecosystem, the levels of organization from largest to smallest are these.
What are: ecosystem, community, population, organism/species?
500
The number of individuals in a specific area.
What is population?
500
This is how immigration and emigration differ from migration.
Migration is temporary - immigration & emigration imply that the organisms will stay in their new area.
500
When it comes to limiting factors, this is the difference between density-dependent and density-independent?
What is ... for density-dependent, the factor affects the population based on how many organisms are in that area. With density-independent, the factor affects the population no matter how many are present.
500
Term for this type of population growth:
What is logistic?
500
An algae-eating snail population lives in a small pond. The amount of algae in the pond is a limiting factor that will help determine this factor.
What is carrying capacity?