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Bear Brook Watershed in Maine
The Bear Brook Watershed in Maine (BBWM) is an experimental forest operated by the University of Maine in Hancock County, Maine, United States. The BBWM focuses around the two small first order branches of Bear Brook on the southeastern slopes of Lead Mountain above Bear Pond. Two years of monitoring studies began in 1987, after which the two watersheds of East and West Bear Brook were determined to be nearly identical. The West Bear Brook watershed has been experimentally acidified with ammonium sulfate every other month since November 1989 to study the effects of sulfur and nitrogen acid deposition. East Bear Brook has been used as an untreated reference. Related research topics at BBWM include climate change, carbon sequestration, base cation depletion, and watershed biogeochemistry.〔(【引用サイトリンク】publisher=University of Maine )〕 There are two USGS stream gauges on the East and West Branches of Bear Brook.〔(【引用サイトリンク】publisher=USGS )〕〔(【引用サイトリンク】publisher=USGS )〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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