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Recovery Strategy for the Hill's Thistle (Cirsium hillii) in Canada


Parks Canada Agency led the development of the recovery strategy. The strategy was prepared by J.A. Jones for the Bruce Peninsula and Manitoulin Island Alvar1 Recovery Team. Thank you to all the members of the Recovery Team for their participation in this report. Thanks to Jarmo Jalava (Consulting Ecologist, Paisley, Ontario) for providing Bruce Peninsula data and extensive help with the document, and to Clint Jacobs (Walpole Island First Nation), for his review of the document. Brian Hutchinson and Hilary Gignac are thanked as past co-chairs of the Recovery Team from 2001 to 2005, as is Kirsten Querbach for chairing from 2005 to 2009. Thanks are also due to those who participated in the crafting of the critical habitat maps for the Bruce Peninsula, Wasaga Beach Provincial Park, and Manitoulin Region during two workshops in October 2009 and April 2010: Mark Carabetta (Ontario Nature), John Gerrath (Nature Conservancy of Canada), Bob Barnett (Escarpment Biosphere Conservancy), Anthony Chegahno (Chippewas of Nawash (Neyaashiinigmiig) First Nation), Will Kershaw (Ontario Parks), Eric Cobb (Ontario Ministry of Natural Resources), Jarmo Jalava, and Judith Jones. Mapping of the critical habitat at Wasaga Beach was only possible because of the kind provision of data by Keith Johnston and Marilyn Beecroft (Ontario Parks) and Burke Korol and Paul Jurjans (Ontario Ministry of Natural Resources). Access to the Natural Heritage Information Centre (NHIC) data, also for the purposes of the critical habitat mapping, was facilitated by Mike Oldham, Simon Dodsworth, and Martina Furrer.

1 "Alvar" is a Swedish word, originally used for the grasslands on the islands of Öland and Göteland in the Baltic Sea. In the Great Lakes basin, "alvar" refers to naturally open areas with shallow soils over relatively flat, limestone bedrock, with trees absent or at least not forming a continuous canopy (Reschke et al. 1999, Brownell and Riley 2000). There are several different kinds of alvars (just as there are different kinds of forests), and each type has a distinctive group of species present.