By Mike Stimpson, Local Journalism Initiative Reporter Thunder Bay Source THUNDER BAY – Bertha Sutherland, Constance Lake First Nation’s land and resource officer, appreciates the work of the Four Rivers Regional Guardians Network. A grad student with Four Rivers “has been with us for almost two years now and she’s doing an excellent job,” Sutherland said at the announcement of a major development for the Canada-wide Guardians environmental initiatives program. Four Rivers, an initiative of Matawa First Nations Management, is part of that of the National Guardians Network and has been helping Constance Lake figure out what happened in late 2021 when the First Nation northwest of Hearst was hit by an outbreak of fungal infection called blastomycosis. Caused by spores found in soil and rotting wood, blastomycosis often has…