| Autor: |
Pellerin, B.A.1 Brian.Pellerin@unh.edu, Fernandez, I.J.1, Norton, S.A.2, Kahl, J.S.3 |
| Předmět: |
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| Zdroj: |
Water, Air & Soil Pollution. Feb2002, Vol. 134 Issue 1-4, p189-204. 16p. |
| Abstrakt: |
Near-stream and upslope soil chemical properties were analyzed to infer linkages between soil and surface water chemistry at the Bear Brook Watershed in Maine [BBWM]. Organic and mineral soil samples were collected along six 20 m transects perpendicular to the stream and one 200 m transect parallel to the stream. O horizon soils immediately adjacent to the stream had a significantly higher pH (4.20) and lower soil organic matter percentage (54%) than upslope O horizons (3.84 and 76%, respectively). Additionally, near-stream O horizon soils had significantly higher concentrations of water-soluble Al (2.7 ×), exchangeable Al (2.3 ×), and organically-bound Al (3.9 ×) and significantly lower concentrations of exchangeable Ca (0.4 ×) than O horizons upslope. These results suggest that Al can accumulate in non-hydric near-stream zone soils at this site. Mobilization of labile Al from near-stream zone soils during hydrologic events could play a key role in explaining controls on Al in stream water at BBWM. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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Full text from SpringerLink