Hydrologic variability in black ash wetlands: Implications for vulnerability to emerald ash borer

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dc.contributor.authorCianciolo, Thomas R.en
dc.contributor.authorDiamond, Jacob S.en
dc.contributor.authorMcLaughlin, Daniel L.en
dc.contributor.authorSlesak, Robert A.en
dc.contributor.authorD'Amato, Anthony W.en
dc.contributor.authorPalik, Brian J.en
dc.date.accessioned2022-04-28T17:34:22Zen
dc.date.available2022-04-28T17:34:22Zen
dc.date.issued2021-04en
dc.description.abstractBlack ash (Fraxinus nigra) wetlands are widespread, forested landscape features in the western Great Lakes region. However, the future of these ecosystems is threatened due to impending spread of the invasive emerald ash borer (EAB), which results in tree mortality, decreased transpiration, and potential shifts to wetter, non-forested conditions. The vulnerability to such ecohydrologic shifts likely varies according to local hydrologic regimes controlled by landscape settings, but this site-dependent vulnerability and our ability to predict it is unknown. Here, we assessed vulnerability potential as a function of site hydrology in 15 undisturbed black ash wetlands from their three most common hydrogeomorphic settings in northern Minnesota: lowland, depression, and transition. Further, we used high-resolution (1-cm) surface elevation models to assess spatial variability of water levels at a subset of 10 sites. Although we observed similar ET and groundwater exchange rates among settings, lowland sites were generally drier because of elevated landscape position and greater water level drawdowns (via lower specific yield). We predict that such drier sites will exhibit greater water level increases following EAB-induced ash mortality, compared to wetter sites where open water evaporation and shallow-rooted understory transpiration will offset losses in tree transpiration. Moreover, compared to wetter sites, drier sites exhibited minimal microtopographic variation, limiting the number of elevated microsites for tree establishment and eventual canopy recovery after ash loss. These results suggest that site wetness is a simple and effective predictor of black ash wetland vulnerability to hydrologic regime change. To that end, we assessed the ability of common terrain metrics to predict site wetness, providing a potential tool to target vulnerable areas for active management efforts.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesDepartment of Interior Northeast Climate Adaptation Science Center; Minnesota Environmental and Natural Resources Trust Fund; Minnesota Forest Resources Council; USDA Forest Service Northern Research Stationen
dc.description.sponsorshipDepartment of Interior Northeast Climate Adaptation Science Center; Minnesota Environmental and Natural Resources Trust Fund; Minnesota Forest Resources Council; USDA Forest Service Northern Research StationUnited States Department of Agriculture (USDA)United States Forest Serviceen
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1002/hyp.14014en
dc.identifier.eissn1099-1085en
dc.identifier.issn0885-6087en
dc.identifier.issue4en
dc.identifier.othere14014en
dc.identifier.urihttp://hdl.handle.net/10919/109760en
dc.identifier.volume35en
dc.language.isoenen
dc.publisherWileyen
dc.rightsPublic Domain (U.S.)en
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/en
dc.subjectevapotranspirationen
dc.subjectgroundwater exchangeen
dc.subjectinvasive pesten
dc.subjectmicrotopographyen
dc.subjectspecific yielden
dc.subjectterrain analysisen
dc.titleHydrologic variability in black ash wetlands: Implications for vulnerability to emerald ash boreren
dc.title.serialHydrological Processesen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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