Context: Finally, an introduced species may unintentionally injure a species that depends on the species it replaces. In Belgium, Prunus spinosa from Eastern Europe leafs much sooner than its West European counterparts, disrupting the feeding habits of the Thecla betulae butterfly (which feeds on the leaves). Introducing new species often leaves endemic and other local species unable to compete with the exotic species and unable to survive. The exotic organisms may be predators, parasites, or may simply outcompete indigenous species for nutrients, water and light.

Question: What may unintentionally injure a species that depends on the species it replaces?
Answer: an introduced species

Question: Where does the Prunus spinosa leaf much sooner?
Answer: In Belgium

Question: What animal can its feeding habits disturbed by the Prunus spinosa?
Answer: leaves endemic and other local species unable to compete with the exotic species and unable to survive

Question: What species struggle to with the introduction of new species?
Answer: endemic and other local species

Question: What types of new species can be introduced?
Answer: The exotic organisms may be predators, parasites

Question: What may unintentionally injure a species that depends on the species it feeds on?
Answer: Unanswerable

Question: Where does the Prunus spinosa leaf without sunlight? 
Answer: Unanswerable

Question: What disrupts the feeding habits of exotic organisms?
Answer: Unanswerable

Question: What does introducing new spinosas often do?
Answer: Unanswerable

Question: What types of new nutrients can be introduced?
Answer: Unanswerable