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APPENDIX C


Interaction matrix quantifying the seed dispersal between all plants and all animals in eight study sites on two Galápagos Islands. Interaction strength between plant i and animal j reflects the number of droppings of the animal that contained at least one intact seed of the plant. Plants and animals are ordered by their Linkage level (Lp and La, respectively) from generalist to specialist species. Plant origin: E) endemic, N) native, A) alien, ?) undetermined.

origin

species

Geospiza fuliginosa

Microluphus albemarlensis

Chelonoidis nigra

Microlophus bivattatus

Mimus melanotis

Mimus parvulus

Myiarchus magnirostris

Dendroica petechia

Geospiza fortis

Geospiza magnirostris

Crotophaga ani

Platyspizia crassirostris

Camarhynchus parvulus

Certhidea fusca

Geospiza scandens

Camarhynchus pallidus

Certhidea olivacea

Camarhynchus psittacula

Lp

E

Miconia robinsoniana

30










1




6

69

5




2

4

13

3




7

4




11

N

Tournefortia psilostachya




76







5

30

10

11

1




1

1



















8

A

Talinum paniculatum

4




2













1

1

1







3













1

7

A

Rubus niveus

1







1

6




10




2



















1







6

N

Zanthoxylum fagara




6




27

6

2

20










1






















6

E

Tournefortia pubescens




15




6

2

16

2


































5

A

Lantana camara




9

1

29

5




8


































5

A

Paspalum conjugatum

25



















7







1




1

1













5

?

Eragrostis sp.

45






















1

1




1



















4

N

Chiococca alba




21




8

17

2





































4

N

Polygonum opelousanum

15






















1

1













1










4

N

Scutia spicata




10







1

1

2


































4

E

Passiflora foetida







1

1

1








































3

E

Tournefortia rufo-sericea




4




4




1





































3

A

Portulaca oleraceae

5







1

1








































3

A

Psidium guajava







1

2

1








































3

A

Sida ciliaris




1

2

1











































3

N

Bursera graveolens




2










4

1


































3

N

Desmodium procumbens

1






















1

2

























3

N

Fimbrystilis dichotoma

21




2













1































3

N

Vallesia glabra










1

1




1


































3

?

Desmodium incanum

1

























2

























2

?

Gen. sp.1



















1













2



















2

?

Panicum sp.

1




1














































2

?

Poacea sp.2

54








































1










2

E

Cordia leucophlyctis




20










1





































2

E

Lantana peduncularis




9










1





































2

A

Ipomoea nil




1

1














































2

A

Momordica charantia




1










1





































2

N

Cordia lutea










2




3





































2

N

Maytenus octogona




3







1








































2

N

Mentzelia aspera

4

























1

























2

?

Gen. sp.2

7




















































1

?

Gen. sp.3






















1































1

?

Gen. sp.4







1














































1

?

Gen. sp.5






















1































1

?

Gen. sp.6

1




















































1

?

Poacea sp.1

8




















































1

E

Croton scouleri




1

















































1

E

Opuntia echios




4

















































1

E

Pilea baurii



















1


































1

E

Psidium galapageium







8














































1

E

Urochloa multiculma




1

















































1

A

Citrus x limón







1














































1

A

Pennisetum purpureum






















1































1

A

Sida rhombifolia




1

















































1

A

Solanum americanum





































1
















1

A

Tradescantia fluminensis

1




















































1

N

Boeravia caribaeia










1











































1

N

Clerodendrum molle







2














































1

N

Crotalaria pumila




2

















































1

N

Cryptocarpus piriformis




1

















































1

N

Erichloa pacifica

3




















































1

N

Hippomane mancinela







5














































1

N

Hypoxis decumbens

1




















































1

N

Ludwigia leptocarpa

1




















































1

N

Sida espinosa

1




















































1

N

Sida hederifolia







2














































1




La

21

20

14

13

13

11

11

8

7

6

4

4

4

2

2

2

1

1





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