Impact of Introduction:
A) Realized: When V. piscinalis was introduced to Oneida Lake, native gastropods (in particular, hydrobiid snails) decreased in abundance (Grigorovich et al. 2005), possibly due to competition.
B) Potential: This species has the potential to compete with native gastropods for food and space (Grigorovich et al. 2005). Unlike native gastropods, it is capable of filter feeding on suspended food items in eutrophic conditions, which could conceivably allow it to become competitively dominant in such conditions.
References: (click for full references)
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