Deck 7 (slides 35-41)

The warblers (a species of bird) all day the same food (insects), the still occupy _________ ________.

The warblers feed at __________ levels in the spruce trees, which limits __________ between these similar species.

A population of hawks and a population of owls both feed on rodents in a field but they do not occupy the same _______ and do not compete for ________. The hawks feed during the _____ and the owls feed at ________.

Predation is another factor that controls population _________.

Predation is when predators and prey help each other to maintain a ________ ___________ over time.

A few years after the prey population decreases, the predator population __________.

A few years after the predator population decreases, the prey population __________ (less predators to eat prey).

A few years after the prey population increases, the predator population __________ (more prey to eat).

An effect of important species on ecosystems is if a species is imported to a new environment, its natural __________ may not be there.

If a species is imported to a new environment and its natural predator is not there, the imported species will _________ rapidly and start to negatively affect the _________ populations by competition. **study rabbit example on slide 38

An example of the importation of a new species on an ecosystem is starlings from Europe in the U.S. who competed with _______ _______ for nesting cavities.

Another example of the importation of a new species on an ecosystem is purple loose strife from Europe in the U.S., which competed with ________ for living space.

Another example of the importation of a new species on an ecosystem is Zebra Mussels in U.S. lakes which were brought in to the Great Lakes by ________ ___________ from Eurasia.

After the Zebra Mussels were brought to the Great Lakes, they were spread from there by _______ into other lakes.

After the Zebra Mussels were spread into other lakes, they ________ water intake pipes, outcompeted _________ species of clams and mussels, and ______ people’s feet.

Parasitism is another example of factors that control population _________.

Parasitism is when ___________ populations are more likely to be infected by and pass parasites.

Overcrowding, leading to stress, is another example of factors that control population ________.

Overcrowding, leading to stress, is caused by lack of ________ _______.

Overcrowding can cause the __________ system to be negatively affected (stress moves the body out of ________).

Stressed out animals are less likely to _________ successfully and are more likely to get ______ and ______.