Table 12.2. Use of 30 forest remnants on the Pacific slope of the Cordillera de Tilaran, Costa Rica, by five
species of fmgivorous birds.
Remnant
JW
AC2
MA
RLC
AC1
FA4
RA2
AF2
VP
CM
AB
AF1
RC
TS
FA3
FV2
JH
RA1
RBI
FA1
FA2
RB2
TG
FV1
FC
ER
WG
RB3
TH
BM
Total
Emerald
Toucanet
167
181
77
138
147
38
92
49
27
51
62
27
20
37
16
23
38
29
34
5
5
32
26
15
23
18
17
17
8
2
1421Three-wattled
Bellbird
13
10
114
0
23
42
8
0
34
6
6
0
11
14
26
0
1
4
0
21
19
0 0 0 0 0 0 0 0 1353Keel-billed
Toucan
3
1
28
4
9
37
8
2
22
21
6
4
25
5 1 3 0 5 411
11
0 1 2 3 0 1 0 0 2219Black Guan
40
34
0
42
0
0
0
34
0
0
0
25
0
0
0
10
0 0 0 0 0 0 312
0 0 0 0 2 0202Resplendent
Quetzal
17
10
0
25
4 0 0 0 0 0 310
1 0 0 5 0 1 0 0 0 0 0 0 0 2 1 0 0 079Total
240
236
219
209
183
117
108
85
83
78
77
66
57
56
43
41
39
39
38
37
35
33
30
29
26
20
19
17
10
5
2274
Numbers are based on an average of 24 censuses conducted in each remnant between June 1991 and January 1993. Remnants are listed in
order of decreasing total number of fmgivores observed.Table 12.3. Relationships between frugivore abundance and forest fragmentation.
No. of Individuals
All species
Three-wattled Bellbird
Black Guan
Keel-billed Toucan
Emerald Toucanet
Resplendent Quetzal
No. of Species
Fruit
Abundance
0.68***
0.63***
-0.08
0.74***
0.58***
0.26
0.71***Fragment
Size
0.78***
0.24
0.46**
0.32*
0.75***
0.42*
0.80***Total
Distance
0.38*
0.58***
-0.26
0.72***
0.14
-0.05
0.36*Open
Distance
0.22
0.74***
-0.49**
0.66***
-0.04
-0.28
0.15Percentage
Forest
0.17
-0.09
0.38*
-0.20
0.17
0.31*
0.25Altitude
0.26
-0.24
0.77***
-0.31*
0.25
0.54**
0.41*Data are Spearman rank correlation coefficients between frugivore abundance, expressed as mean number of birds or species observed per
census (20-25 censuses), and Lauraceae fruit abundance, fragment size, total distance and open distance to extensive forest (which reflects
isolation), percentage forest within a 200-m radius, and altitude for 30 forest fragments (June 1991 to January 1993; Guindon 1996).
, P < 0.05; , P < 0.01; , P < 0.001.