FORT ST. JOHN, B.C. - A report to be presented at a public hearing on the Site C dam says the massive project on the Peace River in northeastern B.C. would impact six mammal species that are already affected by industrial development.

Biologist Clayton Apps' report is related to caribou, grizzly bear, grey wolf, lynx, wolverine, and the fisher — a type of weasel from the mustelid family.

Apps, who was to appear before the Joint Review Panel on Wednesday, says the cumulative effects of development in the region are so significant that some wildlife populations may not be viable or recoverable in the future.

He evaluated the impacts of past, present, and projected future human influence, including the Site C dam, and says erosion from the dam would also affect wildlife populations along the Rockies.

The biologist wrote the report on behalf of the Yellowstone to Yukon Conservation Initiative, a non-profit organization that opposes the $8-billion project.

BC Hydro says Site C is needed to generate electricity but opponents maintain the massive dam would flood an 83-kilometre stretch of the Peace River, affecting First Nations' territory, a highway and the homes of farmers.

Related on HuffPost:

Loading Slideshow...
  • Mackenzie River Basin Map

    A map of the Mackenzie River Basin.

  • Aerial View Of Mackenzie River Basin

    An aerial view of the Mackenzie River Basin.

  • Mackenzie River

    The mighty Mackenzie, the namesake of the Mackenzie River Basin.

  • Peace River Valley

    The Peace River Valley in B.C.'s north, part of the Mackenzie River Basin.

  • The Peace River

    The mighty Peace River in B.C.'s north, part of the Mackenzie River Basin.

  • The Peace River

    The Peace River wends its way through the northern Canadian town that bears its name. The Peace River is part of the Mackenzie River Basin.

  • The Mackenzie River

    An ice road over the Mackenzie River in the Northwest Territories, one of the northern parts of the Mackenzie River Basin.

  • The Mackenzie River

    Tire tread on an ice road across the Mackenzie River in the Northwest Territories. The Mackenzie River is the namesake of the Mackenzie River Basin.

  • The Mackenzie River

    An ice road across the Mackenzie River in the Northwest Territories, one of the northerly portions of the Mackenzie River Basin.

  • North Nahanni River

    The Mackenzie Mountains stand astride the North Nahanni River, a tributary of the Mackenzie River and one part of the Mackenzie River Basin.