Fig. 1. Isolation, defined as
the harmonic mean distances from the three nearest conspecific populations
extant in 1997-98, forpopulations of serpentine seep
plants that were found in
1981-82 and were extinct
(y) versus not extinct (n) in
1997-98
Fig. 2. Isolation, defined as
in Fig. 1, for sites where
populations of serpentine
seep plants were absent in
1981-82 and became colonized (y) or not colonized
(n) by 1997-98
10. Plant Diversity in a Patchy Landscape
155
z ye.\f5J
o
lt)
Z
~
Wn~ ~ 0
I
I
o
o -
I
,I
100
1000
DISTANCE FROM DISTURBANCE
I
I
I
I I I
z
o Y I- 0 CD1JXIJ!IJi (ll)~
Z
o ..:.J
o nl- OCDO 1IIlJDJ(j[) ~~orn= 00o
I
I
I
I I I
<: >Cl Cl "Cl'P ,,<:>Cl~Cl~Cl
ISOLATION