2. How can diversity within an ecosystem be compromised? by regulating human activity within an ecosystem
by building structures on natural habitat areas
by helping to maintain habitats that have been disturbed
O by leaving the ecosystem alone to fend for itself

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?