What is the relationship between colonizing success and the number of species already established on an island? a) as the number of established species on an island decreases, colonizing success also decreases. b) there is no relationship between the number of established species on an island and colonizing success. c) as the number of established species on an island increases, colonizing success also decreases. d) as the number of established species on an island increases, colonizing success also increases. e) as the number of established species on an island decreases, colonizing success also decreases; and as the number of established species on an island increases, colonizing success also increases.