The Future of Wolves on Isle Royale   Leave a comment

From Michigan in Pictures August 19, 2015

Wolf on Isle Royale

Alpha Male, photo by Rolf Peterson/Wolves and Moose of Isle Royale

The National Park Service has opened a formal public comment period that will close on August 29, 2015 regarding future management options for wolves in Isle Royale National Park. The wolf population has plummeted because of a lack of gene flow from the mainland and park management is considering an array of options. If you have commented before, do it again as anything preceding the current comment period is now considered informal input and won’t be considered further.

Moose have important effects on island vegetation, including forest cover, and wolves are the only moose predator on the island. The wolf population on Isle Royale is very low. With their long-term survival on the island in question, the moose population is likely to increase in the short term (5-10 years), which could result in impacts to vegetation and forest cover because of over-browsing.The six plan options they lay out in this PDF are:

  1. No-action alternative: Current management would continue; the park would not actively manage vegetation or the moose and wolf populations
  2. Introduce wolves once: Reestablish wolves on the island by bringing in new wolves one time to mimic a migration event; no moose management
  3. Maintain both species: Maintain populations of moose and wolves on the island, which could include wolf reintroduction or augmentation
  4. Introduce wolves once and reduce the moose population: Reestablish wolves on the island by bringing in new wolves one time; reduce moose density if/when the wolf population is no longer impacting the moose population and moose herbivory is having a demonstrated impact on park resources
  5. Reduce moose population: No wolf reintroduction or augmentation; reduce moose density if/when the wolf population is no longer impacting the moose population and moose herbivory is having a demonstrated impact on park resources
  6. Intensively manage the moose population: No wolf reintroduction or augmentation; intensively manage moose population to a low level; potential for direct vegetation restoration through seed gathering and planting on offshore islands

Click over for more and to comment.

The Wolf Moose Project on Isle Royale is the longest continuous study of any predator-prey system in the world. Rolf Peterson began leading the wolf moose project in the early 1970s, and remains a world authority on wolves and moose. About this photo he says:

It was a remote camera photo that I set up. It shows the alpha male in the Chippewa Harbor Pack in 2009, revisiting the remains of a moose the pack killed in the adjacent pond the previous autumn.  The wolves managed to yank the remains out of the pond the next summer and consume the rotting carcass.

You can view this photo background bigtacular and follow the Wolves & Moose of Isle Royale on Facebook for updates.

More wolves on Michigan in Pictures.

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