Biology
Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 58, Problem 6TY
Summary Introduction

Introduction: Ecologists MacArthur and Wilson proposed a comprehensive model for succession on new islands. This was called the equilibrium model of island biogeography. Succession occurs by slow and gradual development, starting from a sterile beginning.

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Which statement comparing island biogeography to mainland biogeography is true? A. The slope of species richness to area should be steeper for mainland species than for island species. B. Mainland sites should experience higher rates of immigration than island sites. Mainland sites should experience higher rates of extinction than island sites. C. D. On the mainland, extinction rate increases with area faster than immigration rate does, whereas the opposite is true for islands. E. Extinction rates would be the same for mainland and island sites.
slands are well known for having many endemic (unique) species. What is a likely explanation for this pattern?   A. Humans bring partly or fully domesticated species with them when they arrive on islands.   B. Colonizers encounter fewer competitors on an island, so they can diversify.   C. Islands are more complex habitats than continents are, so they have more niches for specializations.   D. Colonizers are likely to have more diversity than local populations and thus outcompete them.   E. The type of organism that is a good colonizer has more than the average amount of genetic variability, so it's more likely to speciate.
hichstatement about snowshoe hare and lynx populations in boreal Canada is false?a.Lynx are not the only important predator of snowshoe hares.b.Lynx and hare populations both oscillate repeatedly, with a similar period.c.Snowshoe hares rarely deplete their food supply enough to affect theirpopulation biology.d.Trapping records kept by non-scientists can provide useful records ofhare population sizes.e.Field experiments imply that hare cycles depend both on the hares’ foodand their predators.
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