Question

effects of roads on space use by squirrels
understanding animal - human interactions, as roads and traffic patterns, provides insights into causes and mechanisms of behavioral modifications associated.
we investigated effects of roads and traffic on space use and movement patterns of two forest - dwelling squirrels: arizonas mount graham red squirrels and introduced, non - native aberts squirrels.
to assess the effects of roads on space use and movement patterns, we compared the probability that a squirrel home range included roads and random lines in forests, and assessed effects of traffic intensity on rate of road crossing and movement patterns.
experiment set - up

1. there is considerable overlap in the diets of both types of squirrels. red squirrels were introduced to the mountains in 1941. what effect would introduction have on mt. graham squirrels?

red squirrels introduction may cause competition for food potentially harming mt. graham

1. what is the purpose of the random lines?

without more context, it could be for sampling or reducing biases in experiment

1. compare the range of the red squirrel to the range of the aberts squirrel.

red squirrels have a more widespread range globally compared to abert squirrels

1. propose a definition of a “home range” as it pertains to squirrel populations.

the area that a group or individual squirrel regularly

1. propose a possible explanation for the differences in the observed behavior.

Explanation:

1. Red squirrels' introduction may compete with Mt. Graham squirrels for food, potentially harming the latter due to resource - sharing.
2. Random lines in an experiment can be for sampling to get representative data or reducing bias by ensuring randomness in the study area.
3. Red squirrels likely have a more widespread range possibly due to adaptability or historical factors compared to Abert's squirrels.
4. A home range for squirrel populations is the area that a group or individual squirrel regularly inhabits and uses for activities like foraging, nesting, etc.
5. Differences in observed behavior could be due to factors such as resource availability (food, shelter), competition with other species, and environmental factors like the presence of roads and traffic.

Answer:

1. Red squirrel introduction may cause competition for food, potentially harming Mt. Graham squirrels.
2. Without more context, it could be for sampling or reducing bias in the experiment.
3. Red squirrels have a more widespread range globally compared to Abert's squirrels.
4. The area that a group or individual squirrel regularly inhabits.
5. Differences could be due to resource availability, competition, and environmental factors.