2.1 Intro to Populations Flashcards
What is a population?
A group of individuals of same species in the same are at the same time who rely on the same resources and interbreed.
What is population density?
The number of organisms in a given area that can affect the population due to competition for resources, such as predication and spread of disease.
What is population distribution?
Population distribution is the spatial relationship between members of a population.
What is a clumped distribution?
Individuals are in multiple clumped formations due to resources or social interactions.
What is the difference between random and uniform distribution?
Random has abundant resources and uniform is lacking resources. Random has no strong social interactions and uniform has competition.
Why is a population uniform?
Scarce resources or competition between species.
What are the 2 main types of sampling?
Mark and recapture and random sampling.
40 butterflies are marked and released. 3 days later you go and capture 40, only 12 with marks, what is the estimated population size?
133 butterflies.
Quadrats are filled with the dandelions counting 11, 7, 9, 5, and 3. Each quadrat is 5x5 miles. If there are 25 squares, what is the estimated population?
175 dandelions.
If there are 315 individuals in a 35 meter area, what is the population density?
9 ind/ sq meter
