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The Spruce Bog: An Essay in Ecology - DVD
Catalogue Number: NFB520526
Producer: National Film Board Of Canada
Producers: J.V. Durden, Guy Glover
Directors: Dalton Muir
Producing Agencies: National Film Board of Canada (Montreal), Office national du film du Canada (Montreal)
Subject: Documentary, Science
Language: English
Country Of Origin: Canada
Copyright Year: 1957
Running Time: 22:12
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The Spruce Bog: An Essay in Ecology - DVD 
Catalogue Number: NFB520526
Producer: National Film Board Of Canada
Producers: J.V. Durden, Guy Glover
Directors: Dalton Muir
Producing Agencies: National Film Board of Canada (Montreal), Office national du film du Canada (Montreal)
Subject: Documentary, Science
Language: English
Country Of Origin: Canada
Copyright Year: 1957
Running Time: 22:12
Click here for pricing
The conditions under which a spruce bog is formed, with details of the plant types found at successive stages of development from open water to mature spruce forest. Time-lapse photography illustrates the growth and decay of vegetation preceding the appearance of the sphagnum moss that chokes off water to make the floor of the forest.