Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
32 Cards in this Set
- Front
- Back
|
Carrying Capacity is... |
The maximum size that a population can reach in an ecosystem |
|
|
Population is... |
A group of organisms of the same species that live in the same area. (Ex: a desert will have populations of different species of lizards and cactus plants.) |
|
|
Population Density is... |
A measure of the number of organisms that live in a given area. (Ex: The population density of a city may be given as the number of people living in a square kilometer.) |
|
|
Population Dynamics is... |
The study of the changes in the number of individuals in a population and the factors that affect those changes. |
|
|
Population Size is... |
The number of individuals in a population at a given time. |
|
|
Range is... |
The distribution of a population across a large geographic area. |
|
|
Populations are defined by... |
Size, density, spacing, and age structure |
|
|
Growth, Stability, and Decline are... |
Stages that every population goes through |
|
|
The longest of the population stages is... |
Stability |
|
|
Populations tend to stay _____ in size |
Constant |
|
|
Habitats in the middle of the population range have ... |
Greater density than the habitats on the edge of the range |
|
|
Population Spacing is... |
How members of a population arrange themselves |
|
|
The three types of spacing are... |
Clumped, Uniform, Random |
|
|
Postreproductive means... |
Organisms that can no longer reproduce |
|
|
Reproductive means... |
Organisms capable of reproduction |
|
|
Prereproductive means... |
Organisms not yet able to reproduce |
|
|
In order for a species to continue... |
Individuals have to be replaced as they die |
|
|
A competitor is... |
A species characterized by a relatively longer life span, with relatively few offspring, when compared with an opportunist species. |
|
|
An opportunist is... |
A species characterized by a relatively short life span, with relatively large quantities of offspring, as compared with a competitor species. |
|
|
Emigration is... |
In population studies, the movement of individuals out of an ecosystem. |
|
|
Immigration is... |
In population studies, the movement of an organism into a range inhabited by individuals of the same species. |
|
|
A limiting factor is... |
A factor or condition that prevents the continuing growth of a population in an ecosystem.opportunist: |
|
|
True or false- Every population has a limit to its growth |
True |
|
|
The formula to track population change is... |
(birth + immigration) – (death + emigration) |
|
|
Abiotic limiting factors are.... |
Non-living-- air, light, water, etc |
|
|
Biotic limiting factors are... |
Living-- other organisms in the same population or general area |
|
|
Extinction is... |
The permanent disappearance of a species
|
|
|
A habitat is... |
The natural environment in which a living thing gets all that it needs to live
(Ex: a desert, a coral reef, and a freshwater lake.) |
|
|
Pollution is... |
The release of harmful substances into the air, water or land.
|
|
|
Population projections are based on... |
population size, ages of individuals having children, average number of offspring produced by an individual, life expectancy, health in a particular population |
|
|
Over ___ percent of the species that have ever existed on earth are extinct |
99 |
|
|
Human populations put a lot of pressure on the environment with... |
pollution, introduction of new species, and overfishing |
