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The Bear Brook Watershed in Maine: Multi-Decadal Whole-Watershed Experimental Acidification

Journal Article · · Hydrological Processes
DOI:https://doi.org/10.1002/hyp.14147· OSTI ID:1786984
 [1];  [2];  [2];  [2];  [2]
  1. BATTELLE (PACIFIC NW LAB)
  2. University of Maine
+ Show Author Affiliations

The Bear Brook Watershed in Maine (BBWM) is a long-term research site established to study the response of forest ecosystem function to environmental disturbances of chronic acidic deposition and ecosystem nitrogen enrichment. Starting in 1989, the West Bear (treated) watershed received bimonthly applications of ammonium sulfate [(NH4)2SO4] fertilizer from above the canopy, whereas East Bear (reference) received ambient deposition. The treatments were stopped in 2016, marking the beginning of the recovery phase. Research at the site has focused on soils, streams, and vegetation. Here, we describe data collected over three decades at the BBWM—input and stream output nutrient fluxes, quantitative soil pits and soil chemistry, and soil temperature and moisture.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1786984
Report Number(s):
PNNL-SA-157635
Journal Information:
Hydrological Processes, Vol. 35, Issue 5
Country of Publication:
United States
Language:
English

References (13)

Effects of chronic ammonium sulfate treatment on the forest at the Bear Brook Watershed in Maine journal June 2010
Comparing decadal responses of whole-watershed manipulations at the Bear Brook and Fernow experiments journal June 2010
The Bear Brook Watershed in Maine—The Second Decade: Preface journal June 2010
Experimental Acidification Causes Soil Base-Cation Depletion at the Bear Brook Watershed in Maine journal November 2003
Drivers and evolution of episodic acidification at the Bear Brook Watershed in Maine, USA journal June 2010
Twenty-year inter-annual trends and seasonal variations in precipitation and stream water chemistry at the Bear Brook Watershed in Maine, USA journal June 2010
The evolution of the science of Bear Brook Watershed in Maine, USA journal June 2010
Nitrogen mineralization in O horizon soils during 27 years of nitrogen enrichment at the Bear Brook Watershed in Maine, USA journal August 2018
Forest N Dynamics after 25 years of Whole Watershed N Enrichment: The Bear Brook Watershed in Maine journal January 2019
Contrasting stream nitrate and sulfate response to recovery from experimental watershed acidification journal November 2020
Fifteen–year record of soil temperature at the Bear Brook Watershed in Maine journal July 2018
Soil chemical and physical properties at the Bear Brook Watershed in Maine, USA journal June 2010
Chronic Nitrogen Enrichment at the Watershed Scale Does Not Enhance Microbial Phosphorus Limitation journal April 2017

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