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MMS Survival

Survival factors

Takes place when more than one organism seeks the same resource at the same time Competition
Anything that restricts the number of individuals living in a population a limiting factor
What are some factors that increase population size high birthrate, low death rate, migration in, decrease in limiting factors, favorable weather,
Examples of limiting factors disease, competition, crowding, unfavorable weather, increase in predation, food, water, sunlight (plants), temperature, etc.
How is population sampling done? populations are counted in a small area and then multiplied using ratios to reflect a larger area
the largest number of individuals of one species that an area can support based on its limiting factors carrying capacity
An alien/invader species species new to an area, not native
Difference between linear and exponential growth linear adds the same amount each time, exponential growth doubles the total each time
Why are alien species harmful to an area? alien species usually don’t have natural limiting factors, like predators, in the new area and their population grows quickly, taking resources away from the native species
How do limiting factors determine carrying capacity? The more limiting factors there are, the lower the carrying capacity.
What is primary succession? succession in a brand new area--no living things, new soil
What is secondary succession? succession in an area that has recently had living things growing there-soil is in place
What is the difference in the rate of primary and secondary succession? Primary succession takes MUCH longer than secondary because soil has to be formed first.
What is a pioneer species? Pioneers are the first organisms to come in during succession. They grow quickly and have very few limiting factors.
What is a climax community? It is a mature collection of many living things that are present when succession is complete. They require a long time to grow.
What determines the type of plants and animals in an area? Temperature (controlled by altitude and latitude) and precipitation determine the plants. Animals are determined by the amount and type of plants in an area.
Why do population sizes decrease as you go up through an energy pyramid? Populations decrease because the amount of energy available to support them greatly decrease
Why does energy decrease as you go up through an energy pyramid? Energy is lost to: activities required to live, some is wasted, and some is lost as heat.
What is biological magnification? It is the buildup of a pollutant as it moves up through a food web.
Created by: neumeist