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  • Hubbard Brook Experimental Forest: Watershed 3 Manganese Transects
  • Bourgault, Rebecca R; Bloomsburg University of Pennsylvania
  • 2020-09-15
  • Bourgault, R.R. 2020. Hubbard Brook Experimental Forest: Watershed 3 Manganese Transects ver 1. Environmental Data Initiative. https://doi.org/DOI_PLACE_HOLDER (Accessed 2024-12-27).

  • An area of Watershed 3 in Hubbard Brook Experimental Forest containing a seep, a spring and a swale was found to contain hot spots for soil manganese. The source of the Mn was thought to be groundwater discharge, and this area was studied intensively due to its implications for disproportionately affecting headwater stream chemistry. Soils were sampled along a grid pattern; O and B horizon samples were collected and analyzed for dithionite-extractable (total secondary) Mn & Fe, pH, total organic C and N, moisture content, and Cr oxidation potential (indicative of Mn oxide reactivity). The data were spatially interpolated to identify areas of Mn enrichment and other chemical variables related to topography and groundwater discharge. Two hot spots for soil Mn were found: one in a poorly drained, flowing spring and one in a moderately well-drained swale, which had similarly high Mn (6000-9000 mg kg-1 soil). However, the spring soils had high Cr oxidation potential while the nearby swale soils did not, indicating a difference in Mn reactivity. A third location in the study area was a poorly drained seep with water that was not visibly flowing, and these soils had lower quantities of Mn and low Cr oxidation potential.

  • N: 43.959      S: 43.914      E: -71.7022      W: -71.8062
  • knb-lter-hbr.276.1  (Uploaded 2020-09-15)  
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  • DOI PLACE HOLDER
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