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1. Davey et al. (https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.12035) present an analysis

of diversity in birds in Sweden and relate it to climate change. As with the case shown in class, breeding bird surveys (where trained observers track the number of individuals in each species seen along a fixed route) were made across the country in the spring. Temperature and its change are shown below



Screen Shot 2019-09-23 at 11.57.51 PM.png


a.) Note the choice made in the color scheme for these three plots. What is it trying to show and why might it be bad idea? (10 points)


b.) What does this suggest about the relationship between alpha diversity, beta diversity, and temperature change? (10 points)


c.) Provide a simple illustration with species detected along two routes that would illustrate the changes associated with warming. (10 points)

Screen Shot 2019-09-23 at 11.57.51 PM.png

The next two plots show changes over the same
time period in species richness within single
1145
routes and Simpson's diversity (chance that
random samples drawn from two routes will be
9 0
different).
0 25
Average Trance
Fig. 1. Values for Them, the mean April-June temperature (C)
for Sweden from 1987 to 1997 and average Thangs an average of
the difference between Tomm and the mean April-June tempera-
ture for the years 1998-2010.
Baseline
Change
Proportional change
Species richness (5)
0:10
245
4- 2010
5.1928 2010
5 1992-2010
0-57
0-40
Simpson's dissimilarity
Index (Pain)
Pan -2010
Pan- 1990-1010
a 19943010

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