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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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