APPENDIX G
Estimated value of the main species level descriptors for the eight study sites.
|
island
|
Santa Cruz
|
San Cristóbal
|
|
habitat
|
dry
|
humid
|
dry
|
humid
|
|
invasion
|
native
|
invaded
|
native
|
invaded
|
native
|
invaded
|
native
|
invaded
|
Strength
|
Native spp.
|
0.308
|
0.440
|
1.621
|
5.459
|
0.326
|
0.336
|
1.385
|
1.188
|
Alien spp.
|
0.022
|
0.058
|
0.095
|
0.714
|
0.274
|
0.571
|
1.137
|
0.849
|
Linkage level
|
Native spp.
|
1.737
|
1.684
|
2.400
|
7.000
|
1.471
|
1.667
|
2.333
|
2.500
|
Alien spp.
|
1.000
|
1.167
|
1.000
|
1.000
|
1.800
|
2.250
|
3.000
|
2.500
|
Specialization
|
Native spp.
|
0.213
|
0.204
|
0.387
|
0.319
|
0.323
|
0.259
|
0.530
|
0.079
|
Alien spp.
|
0.026
|
0.135
|
0.228
|
0.783
|
0.258
|
0.307
|
0.245
|
0.461
|
APPENDIX H
Relative bird abundance at the eight study sites expressed in terms of the number of captures per species.
island
|
Santa Cruz
|
San Cristóbal
|
|
habitat
|
dry
|
humid
|
dry
|
humid
|
|
invasion
|
native
|
invaded
|
native
|
invaded
|
native
|
invaded
|
native
|
invaded
|
total
|
Camarhynchus pallidus
|
|
|
4
|
6
|
14
|
11
|
4
|
11
|
50
|
Camarhynchus parvulus
|
34
|
34
|
19
|
11
|
20
|
30
|
8
|
26
|
182
|
Camarhynchus psittacula
|
|
|
1
|
|
|
1
|
|
|
2
|
Certhidea fusca
|
|
|
|
|
7
|
12
|
21
|
27
|
67
|
Certhidea olivacea
|
|
|
14
|
11
|
|
|
|
|
25
|
Coccyzus melacoryphus
|
|
|
|
3
|
|
|
|
1
|
4
|
Crotophaga ani
|
|
3
|
1
|
3
|
|
1
|
3
|
1
|
12
|
Dendroica petechia
|
25
|
44
|
77
|
29
|
102
|
41
|
65
|
61
|
444
|
Geospiza fortis
|
59
|
111
|
14
|
20
|
40
|
53
|
3
|
3
|
303
|
Geospiza fuliginosa
|
74
|
88
|
90
|
25
|
188
|
160
|
102
|
168
|
895
|
Geospiza magnirostris
|
22
|
16
|
2
|
|
6
|
7
|
|
|
53
|
Geospiza scandens
|
35
|
26
|
|
|
|
|
|
|
61
|
Laterallus spilonotus
|
|
|
1
|
|
|
|
|
|
1
|
Mimus melanotis
|
|
|
|
|
30
|
11
|
|
2
|
43
|
Mimus parvulus
|
39
|
34
|
|
|
|
|
|
|
73
|
Myiarchus magnirostris
|
28
|
26
|
21
|
21
|
33
|
27
|
12
|
7
|
175
|
Platyspiza crassirostris
|
30
|
26
|
3
|
1
|
|
|
|
|
60
|
Zenaida galapagoensis
|
|
1
|
|
|
|
|
|
|
1
|
Total
|
346
|
409
|
247
|
130
|
440
|
354
|
218
|
307
|
2451
|
Appendix I
Two-way contingency table used in partial and overall chi-square tests. Values are numbers of plant species with dry and fleshy fruits of which intact seeds have been found in the droppings of dispersers of each type, i.e. observed interactions. In parenthesis is the number of expected interactions, assuming no assortative linkage between disperser guild and fruit type. Individual chi-square tests indicate the significance of the selectivity of each disperser group for fruit type, applying the Yates continuity correction.
|
|
52 plant species
|
|
|
|
|
|
28 dry-fruited
|
24 fleshy-fruited
|
χ2
|
d.f.
|
P
|
18 seed disperser species
|
10 finches
|
17 (11.3)
|
4 (9.7)
|
6.21
|
1
|
0.013
|
5 other birds
|
6 (12.9)
|
18 (11.1)
|
8.04
|
1
|
0.005
|
3 reptiles
|
13 (18.8)
|
22 (16.2)
|
3.93
|
1
|
0.047
|
Overall test
|
|
|
|
18.17
|
2
|
0.0001
|
Appendix J
Diagram representing the two main dispersal routes used by dry- and fleshy-fruited plants (grey and red circles, respectively) into a site near the Charles Darwin Research Station in the dry zone of Santa Cruz. Triangles represent disperser species. Invasion routes followed by alien plants are highlighted with a bold red contour.
L. camara
T. paniculatum
|