BGYB51H3 Lecture 4 Notes Sep 22

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Department
Biological Sciences
Course
BIOC51H3
Professor
Maydianne Andrade
Semester
Fall

Description
BGYB51H3 Lecture 4 Notes -dispersion is a very rare event and the continents are the sources of the ancestors of organisms on the nearby island -organisms on the island adapt to new conditions on the island and evolve to new species -on an island, there are many empty niches that need to be filled, which causes adaptive radiation -adaptive radiation splits lineages and makes some species endemic -seed dispersal to islands causes plants on islands that are endemic due to adaptive radiation -endemism is more common for species with low dispersal (e.g. plants) -an archipelago is a group of islands formed by volcanic eruptions -Hawaiian islands are different ages due to different eruption times -in the archipelago, species are different on each island but similar
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