Table 12.1
Comparison between the characteristics of empirical data sets
and those of communities emerging from the model described
in Section 12.2.1.2
that are the closest when the interference competition
rate
a^0
varies from 0 to 0.5 and the niche width
nw
varies from 0.5 to 5
Value
Error
SMI
CD
YE
CB
BBL
LRL
SP
Connectance
99
0.26 (0.12)
0.26
(0.31)
0.23 (0.061)
0.24 (0.072)
0.2 (0.17)
0.15 (0.12)
0.27 (0.32)
Chain length
26
4.15 (4.2)
6.2 (7.18)
3.79 (4.89)
4 (2.77)
4.14 (2.55)
4.6 (N.A.)
5.44 (4.81)
Omnivore
19
54 (60)
76 (79)
42 (53)
46 (38)
48 (36)
47 (N.A.)
74
(60)
Top
22
17 (17)
5 (0)
24 (38)
21 (28)
4 (0)
4 (0)
5 (4)
Intermediate
7
63 (69)
80 (90)
55 (53)
60 (62)
68 (68)
82 (87)
79 (92)
Bottom
75
20 (14)
15 (10)
21 (9)
19 (10)
28 (32)
14 (13)
16 (4)
SMI, St Martin Island; CD, Coachella Dessert; YE, Y than
Estuary; CB, Chesapeake Bay; BBL, Bridge Brook Lake; LRL,
Little Rock Lake; SP, Skipwidth Pond.In
each instance, the characteristics of the simulated community
are given, while the empirical data is given in parentheses.
Matching of the two is comparable to
the ones obtained using the Niche model. Other parameters
are fixed:
I, 10;
e, 0.1;
v, 0.5;
^0
,1;
d,2;
f, 0.3;^0
m
, 0.1; 0
b¼
0.25.