Organisms grouped near resources; most common distribution in nature.

Finding mates is easier; tends to be more competition; more infectious disease; more vulnerability to predators

Random distribution

For a monogamous species, the ideal sex ratio is _____male _____female?

Too many males or females leaving many individuals without a mate and unable to reproduce is known as?

Millions of people move around the world each year, driven by necessity, opportunity, or a desire to make new connections and see new places, The depart from a given area which is known as?

The arrival of individuals from outside a given area is known as?

What are the factors that affect population growth? (choose all that apply)

All else being equal, if a population’s birth rate > death rate, then the population will ?

All else being equal, if a population’s birth rate < death rate, then the population will?

Shows how the likelihood of death varies with age.

Every spring, many species of bird travel north to the Arctic to breed, and in the fall travel south again for the winter. This is an example of

You are studying the vegetation communities of the Mongolian grasslands in a 1000-square-kilometer-area. What is your best strategy for estimating the number of individuals of different plant species growing throughout the grasslands?

Which is the highest population density of grasshoppers?

You will be conducting a study of the interactions of vegetation, animals, mineral composition of the soil, and water levels in a saltmarsh. You are studying the saltmarsh

"All the living things and their physical environment within a given area" best defines

A population of wolves is reintroduced into Yellowstone National Park. For the first decade, the wolf population grows exponentially. Then, the population growth slows. The new pattern is known as

Where wolves are reintroduced to Yellowstone National Park, the number of elk and other prey species within the park are

Pandas depend on bamboo. The amount of intact bamboo forest will help determine the

The community is the simplest level of organization that the ecologist studies.

A herd of mule deer living on a certain mountain and separated from other herds of mule deer represents a species.

In a population in which most of the individuals are of pre-reproductive or reproductive age, the population is likely to increase quickly in the future.

At the end of an ice age, you would expect to see exponential growth of species as they colonize regions left uninhabited by glaciers.

The diagram shows a random distribution pattern.

Rocks, soil, water, and oxygen are all ______________factors in the Sierra Nevada ecosystem of California.

Influence does not change with population density. 

The largest population size a given environment can sustainably support. Can fluctuate over time

Exponential growth: Population increases by a fixed percentage every year creating a J-shaped curve

Logistic Growth: describes how a population’s initial exponential increase is slowed and finally stopped due to limiting factors (S-shape curve)