Assertion: harrier's number | /r/CapableOf | suggest significant negative effects
Facets:
value: between predator and prey species
type: OTHER
Source sentences:
text: Another study, which examined the effects of predators – including the Eurasian sparrowhawk and introduced grey squirrel – on UK passerine populations, found that "whilst a small number of associations may suggest significant negative effects between predator and prey species, for the majority of the songbird species examined there is no evidence that increases in common avian predators or grey squirrels are associated with large-scale population declines.