bionerd

bionerd

Lv1

University of Toronto Mississauga

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Calculus1Biology4

1.You are studying 2 wetlands in eastern Ohio - one that hasbecome highly invaded by purple

loosestrife (Lythrum salicaria). These wetlands typicallycontain over 100 species, but in an

amazing coincidence, both your sites only have 6 totalspecies:

Species Site 1 # of Individuals site 2 of Individuals

Carex / Site 1 # of Individuals= 167 + Site 2 # of Individuals76

Conocarpus/ Site 1 # of Individuals=52 +Site 2 # ofIndividuals=0

Daucus carota/Site 1 # of Individuals= 94 +Site 2 # ofIndividuals=32

Lythrum salicaria/Site 1 # of Individuals= 0 +Site 2 # ofIndividuals= 347

Poylgonum / Site 1 # of Individuals= 63+ Site 2 # ofIndividuals= 29

Rumex crispus/ Site 1 # of Individuals= 23 +Site 2 # ofIndividuals= 4

Typha latifolia / Site 1 # of Individuals= 309 +Site 2 # ofIndividuals= 85

A. Calculate the Shannon-Weiner Diversity Index for thiscommunity. Has purple loosestrife

influenced diversity?

2. You are studying bird immigration to 2 small islands off thecoast of San Diego, California; the

islands are identical in size and habitats, but one issubstantially further from the mainland. The

maximum immigration rate is eight new bird species to one islandeach a year, and a maximum

extinction rate of 2. The other island has a maximum immigrationrate of only 3. Based on the

above information, you can make an appropriate assumption aboutextinction rate on the second

island. There are 492 resident bird species in San Diego.

A. Assuming equilibrium on these islands, draw an appropriatelylabeled figure (with

correct values) that includes the predicted patterns for thenear and far island.

B. How many species do you predict to be on each island? (Note:I

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