9.2 biodiversity cont. Flashcards
what is the shannon-weiner diversity index?
what is the species rank vs proportional abundance?
what is the global species richness or vascular plants?
what is the global species richness of mammals?
what is the global species richness of amphibians?
what is the number of dragonfly species?
what is the species-area relationship?
what is island biogeography?
-early explorers noted that large islands hold more species than do small islands
-J. R. Horster on captain cook’s voyage (1772-1775)
-P. Darlington: on islands, a tenfold increase in land area leads to a doubling of the number of species
-the various patches that form the vegetation patterns across a landscape resemble islands of different sizes
island biogeography
island biogeography theory?
-the equilibrium theory of island biogeography has been applied to the study of terrestrial landscapes
-R. MacArthur (Princeton University) and E. O. Wilson (harvard university) developed this theory in 1967
-the number of species established on an island represents a dynamic equilibrium between the immigration of new colonizing species and the extinction of previously established ones
what is an islands
what is the application of island biogeography?
-in some situation, corridors connect patches of similar habitat
-strips of vegetation similar to the patches that they connect
-many corridors are of human origin (ex: windbreaks, drainage ditches)
-connectivity is the extent to which a species (or population) can move along patches within the matrix
