Biology Reference
In-Depth Information
20000
A
R
S
15000
R
V
W
V
R
10000
S
V
S
W
R
S
V
W
W
5000
R
S
V
W
R
S
V
W
R
S
V
W
R
S
V
W
R
W
S
V
R
R
W
S
V
W
S
V
0
WWW
RRR
SSS
VVV
0
2
4
6
8
10
12
14
3000
B
2900
R
S
V
W
2800
2700
R
V
S
W
2600
R
V
2500
S
W
R
V
2400
S
R
W
V
R
R
S
V
R
W
R
R
R
V
R
R
S
V
2300
V
W
S
V
V
V
V
S
W
S
S
SSS
W
W
W
W
WW
2200
0
2
4
6
8
10
12
14
GENERATION
Fig. 17.4 Population growth (A) and unique alleles retained (B) in trials that compare the
effects of corridors of different heights under long-distance dispersal conditions and with
different arrangements of founders. Dispersal distance of pollen and seed is four times as
great in each dispersal category compared to the trials in Fig. 17.3. Trials R and S have 40%
corridors and differ in that in trial R the founders are in one group, while in trial S founders
are split into two smaller groups, one in each preserve. Trials V and W have 10% corridors
and differ in that in trial V the founders are in one group, while in trial W founders are split
into two smaller groups, one in each preserve.
founders were placed in one large square (trial C versus L), or in one smaller
square in each preserve (I versus M). However, when dispersal and corridor
height are increased by a factor of four, then the higher corridor yields a
population that is 21.4% larger when founders are placed in a square in one
preserve (trials R versus V), and 27.9% larger when founders are split into
two groups of equal size, one in each preserve (Fig. 17.4A). Further, under
short dispersal, the greatest difference in population growth is between trial
I, with two squares of 86 founders each placed in two preserves, and trial
 
 
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