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| Titel |
Acid-base characteristics of the Grass Pond watershed in the Adirondack Mountains of New York State, USA: interactions among soil, vegetation and surface waters |
| VerfasserIn |
K. M. McEathron, M. J. Mitchell, L. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 17, no. 7 ; Nr. 17, no. 7 (2013-07-09), S.2557-2568 |
| Datensatznummer |
250018923
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| Publikation (Nr.) |
 copernicus.org/hess-17-2557-2013.pdf |
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| Zusammenfassung |
| Grass Pond watershed is located within the southwestern Adirondack Mountain
region of New York State, USA. This region receives some of the highest
rates of acidic deposition in North America and is particularly sensitive to
acidic inputs due to many of its soils having shallow depths and being
generally base poor. Differences in soil chemistry and tree species between
seven subwatersheds were examined in relation to acid-base characteristics
of the seven major streams that drain into Grass Pond. Mineral soil pH,
stream water BCS (base-cation surplus) and pH exhibited a positive correlation with sugar maple
basal area (p = 0.055; 0.48 and 0.39, respectively). Black cherry basal area
was inversely correlated with stream water BCS, ANC (acid neutralizing capacity)c and NO3-
(p = 0.23; 0.24 and 0.20, respectively). Sugar maple basal areas were
positively associated with watershed characteristics associated with the
neutralization of atmospheric acidic inputs while in contrast, black cherry
basal areas showed opposite relationships to these same watershed
characteristics. Canonical correspondence analysis indicated that black
cherry had a distinctive relationship with forest floor chemistry apart from
the other tree species, specifically a strong positive association with
forest floor NH4, while sugar maple had a distinctive relationship with
stream chemistry variables, specifically a strong positive association with
stream water ANCc, BCS and pH. Our results provide evidence that sugar
maple is acid-intolerant or calciphilic tree species and also demonstrate
that black cherry is likely an acid-tolerant tree species. |
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