Estimating Population Sizes in Ecology

What is the definition of a population in ecological terms?

• A group of different species living in the same area.

• Interacting groups of organisms of the same species living in an area.

• A collection of ecosystems in a specific region.

• A single organism living in isolation.

Why is it important to estimate population sizes in ecological studies?

• To determine the exact number of organisms in the world.

• To understand the dynamics of ecosystems and manage resources effectively.

• To eliminate species that are overpopulated.

• To create a list of all species in an area.

What is the primary reason for using random sampling techniques in ecological studies?

• To ensure that only the largest organisms are counted.

• To avoid bias and obtain a representative sample of the population.

• To focus on the most endangered species.

• To count every individual in a population.

How is quadrat sampling used to estimate the population size of sessile organisms?

• By capturing and marking each organism.

• By counting the number of organisms in a series of randomly placed squares.

• By observing the organisms from a distance.

• By using satellite imagery to count organisms.

What is the capture-mark-release-recapture method used for?

• Estimating the population size of sessile organisms.

• Estimating the population size of motile organisms.

• Tracking the migration patterns of birds.

• Counting the number of plants in a forest.

Which formula is used in conjunction with the capture-mark-release-recapture method to estimate population size?

• The Pythagorean theorem.

• The Lincoln index.

• The Hardy-Weinberg equation.

• The logistic growth model.

What is the Lincoln index formula for estimating population size?

• The total number of organisms captured in the second sample.

• The number of marked organisms recaptured in the second sample.

• The total number of marked organisms in the first sample.

• The total population size.

Which is correct?

• Kangaroos are motile, and corals are sessile.

• Trees are sessile and clovers are motile.

• Lizards are motile, but turtles are sessile.

• Bamboo are motile, and pandas are sessile.

• Capture-mark-release-recapture (Lincoln index) is used to estimate ________ organisms.

• motile

• sessile

• all different types of