Exam 20: Communities and Ecosystems

-The figure shows the results of an experiment where sea stars were removed from communities. What is the effect of sea stars on barnacle A?

Scenario In East Java, Indonesia, a mud volcano has been erupting since 2006. One controversial hypothesis is that the mud volcano in East Java is erupting because a gas mining company was drilling a deep hole nearby. When a mud volcano erupts, hot water deep below the earth's surface mixes with various minerals, and this mud spews out over the surface of the earth. The hot mud flow destroys organismal habitats, including the homes and livelihoods of people. -When the mud volcano stops erupting, colonization of the disturbed area would be ________.

This graph shows the results of a study on black-legged tick nymphs that are infected with the Lyme disease bacterium. The density of infected nymphs was calculated for forest fragments of different sizes (area in hectares). Answer the following questions using this graph. -If a small forest fragment (less than 2.5 hectares in size)was found to have 0.01 infected nymph ticks per square meter, what characteristic would you expect this fragment to have?