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  • Directory of Open Access Journals (DOAJ)  (1)
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  • 1
    Language: English
    In: Biogeosciences, Sept 29, 2016, Vol.13(18), p.5421
    Description: Heavy storm events may increase the amount of organic matter in runoff from forested watersheds as well as the relation of dissolved to particulate organic matter. This study evaluated the effects of monsoon storm events on the runoff fluxes and on the composition of dissolved (#xE2;#x80;#xAF;POC and NO.sub.3 -N#xE2;#x80;#xAF;〉#xE2;#x80;#xAF;DON#xE2;#x80;#xAF;〉#xE2;#x80;#xAF;PON. The integrated DOC fluxes in runoff during the study period were much larger at the deciduous watershed (16#xE2;#x80;#xAF;kg#xE2;#x80;#xAF;C#xE2;#x80;#xAF;ha.sup.-1) than at the mixed watershed (7#xE2;#x80;#xAF;kg#xE2;#x80;#xAF;C#xE2;#x80;#xAF;ha.sup.-1 ), while the integrated NO.sub.3 -N fluxes were higher at the mixed watershed (5.2#xE2;#x80;#xAF;kg#xE2;#x80;#xAF;N#xE2;#x80;#xAF;ha.sup.-1) than at the deciduous watershed (2.9#xE2;#x80;#xAF;kg#xE2;#x80;#xAF;N#xE2;#x80;#xAF;ha.sup.-1). The latter suggests a larger N uptake by deciduous trees. Integrated fluxes of POC and PON were similar at both watersheds. The composition of organic matter in soils and runoff indicates that the contribution of near-surface flow to runoff was larger at the deciduous than at the mixed watershed. Our results demonstrate different responses of particulate and dissolved C and N in runoff to storm events as a combined effect of tree species composition and watershed specific flow paths.
    Keywords: Runoff
    ISSN: 1726-4170
    ISSN: 17264189
    E-ISSN: 17264189
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