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dc.contributor.authorCasson, Nora J.
dc.contributor.authorEimers, M. Catherine
dc.contributor.authorWatmough, Shaun A.
dc.contributor.authorRichardson, Murray C.
dc.date.accessioned2019-02-26T22:16:35Z
dc.date.available2019-02-26T22:16:35Z
dc.date.issued2019-02-19
dc.identifier.citationCasson, Nora J., M. Catherine Eimers, Shaun A. Watmough, and Murray C. Richardson. "The role of wetland coverage within the near-stream zone in predicting of seasonal stream export chemistry from forested headwater catchments." Hydrological Processes. Accepted article, not yet paginated. DOI: 10.1002/hyp.13413.en_US
dc.identifier.issn0885-6087
dc.identifier.urihttp://hdl.handle.net/10680/1635
dc.descriptionPostprint version. "This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record."en_US
dc.description.abstractStream chemistry is often used to infer catchment‐scale biogeochemical processes. However, biogeochemical cycling in the near‐stream zone or hydrologically‐connected areas may exert a stronger influence on stream chemistry compared with cycling processes occurring in more distal parts of the catchment, particularly in dry seasons and in dry years. In this study, we tested the hypotheses that near‐stream wetland proportion is a better predictor of seasonal (winter, spring, summer and fall) stream chemistry compared with whole‐catchment averages and that these relationships are stronger in dryer periods with lower hydrologic connectivity. We evaluated relationships between catchment wetland proportion and 16‐year average seasonal flow‐weighted concentrations of both biogeochemically‐active nutrients, dissolved organic carbon (DOC), nitrate (NO3‐N), total phosphorus (TP), as well as weathering products, calcium (Ca), magnesium (Mg), at ten headwater (< 200 ha) forested catchments in south‐central Ontario, Canada. Wetland proportion across the entire catchment was the best predictor of DOC and TP in all seasons and years, whereas predictions of NO3‐N concentrations improved when only the proportion of wetland within the near‐stream zone was considered. This was particularly the case during dry years and dry seasons such as summer. In contrast, Ca and Mg showed no relationship with catchment wetland proportion at any scale or in any season. In forested headwater catchments, variable hydrologic connectivity of source areas to streams alters the role of the near‐stream zone environment, particularly during dry periods. The results also suggest that extent of riparian zone control may vary under changing patterns of hydrological connectivity. Predictions of biogeochemically‐active nutrients, particularly NO3‐N, can be improved by including near‐stream zone catchment morphology in landscape models.en_US
dc.description.sponsorshipFunding for this project was provided by a Natural Sciences and Engineering Research Council of Canada Discovery Grant to MCE.en_US
dc.description.urihttps://onlinelibrary.wiley.com/doi/abs/10.1002/hyp.13413en_US
dc.language.isoenen_US
dc.publisherJohn Wiley & Sons Ltd.en_US
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectForested wetlandsen_US
dc.subjectNitrateen_US
dc.subjectTotal phosphorusen_US
dc.subjectDissolved organic carbonen_US
dc.subjectWetlandsen_US
dc.titleThe role of wetland coverage within the near-stream zone in predicting of seasonal stream export chemistry from forested headwater catchmentsen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/hyp.13413en_US


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