Common hoptree (Ptelea trifoliata) COSEWIC assessment and status report: chapter 8

Limiting Factors and Threats

Three sites, Linden Beach, Seacliff, and Erie Beach, have been lost due to human activity. Other populations are under threat as cottage development and beach grooming continue to intensify.

Double Crested Cormorants have recently experienced a major expansion of their populations in the lower Great Lakes and are known to be nesting on some of the Erie Islands. They have significantly impacted the vegetation of East Sister Island and Middle Island. The species is still doing well on Middle Island and perhaps even expanding with the forest openings created by the cormorants.

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