282
R.M. Zink and J. Klicka
3.2 Intraspecific Studies
Geographic patterns of:lt are shown for two species (Fig. 3), the Song Sparrow and
the Red-winged Blackbird (Agelaius phoeniceus). The latter is consistent with the
predicted pattern whereas that for the Song Sparrow is not (Fig. 1). The mismatch
distribution (Fig. 4) has the shape of a growing population although the observed
distribution differed significantly from expected (P < 0.01). The plot (Fig. 5) of
number of lineages vs time is consistent with that expected for a growing population. The NJ tree (see Fry and Zink 1998, their Fig. 2) shows relatively little structure.
>,
-
·til
' "'
Q,j
..
is
Q,j
::!
- 0
Q,j
~
=
Z
Glaciated
0.03
0.025
0.02
0.015
0.01
D
0.005
10
20
30
40
50
60
Glaciated
0.05 - . - - - - - - - - - , . - - - - - - ,
B
0.04
0.03
[U12
[101
D D
10
20
30
40
50
60
70
Latitude
Fig. 3. Plot of latitude vs
nucleotide diversity for
Red-winged Blackbird (top;
data from Ball et al. 1988,
plotted by Fry and Zink
1998) and Song Sparrow
(restriction site data from
Fry and Zink [1998]). The
vertical line denotes the approximate southern limit of
the Laurentide Ice Sheet
18,000 ybp (Pielou 1991)