Impacts of the Hemlock Woolly Adelgid (Adelges tsugae) on Headwater Stream Large Woody Debris Loads in the Southern Appalachian Mountains.
The hemlock woolly adelgid (HWA; Adelges tsugae) is responsible for widespread mortality of eastern hemlock (Tsuga canadensis) throughout its range. Models suggest that HWA-induced mortality could serve as a disturbance event that will increase large woody debris (LWD) loads in head-water streams. T...
| Publicado en: | Southeastern Geographer Vol. 60; no. 1; pp. 65 - 87 |
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| Autores principales: | , , , |
| Formato: | Artículo |
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University of North Carolina Press
Spring2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=142372203&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 142372203 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 0038366X Z4J jtl: Southeastern Geographer issn: 0038366X maglogo: N pubinfo: dt: Spring2020 vid: 60 iid: 1 pid: 2027 pub: University of North Carolina Press artinfo: ui: 142372203 10.1353/sgo.2020.0005 ppf: 65 ppct: 22 formats: fmt: – @attributes: type: T – @attributes: type: P size: 4.7MB tig: atl: Impacts of the Hemlock Woolly Adelgid (Adelges tsugae) on Headwater Stream Large Woody Debris Loads in the Southern Appalachian Mountains. aug: au: Mcdade, Burke Martin, Derek J. Gevel, Saskia L. Van De Mitchell, Jessica affil: Appalachian State University University of Montana su: Appalachian Mountains Coarse woody debris River ecology Watersheds Mountains Rivers sug: subj: Appalachian Mountains Coarse woody debris River ecology Watersheds Mountains Rivers keyword: Eastern hemlock Headwater streams Hemlock wooly adelgid Large woody debris Eastern hemlock Headwater streams Hemlock wooly adelgid Large woody debris ab: The hemlock woolly adelgid (HWA; Adelges tsugae) is responsible for widespread mortality of eastern hemlock (Tsuga canadensis) throughout its range. Models suggest that HWA-induced mortality could serve as a disturbance event that will increase large woody debris (LWD) loads in head-water streams. The objective of this research was to investigate the extent to which HWA infestation has impacted in-channel LWD loads in southern Appalachian headwater river systems. We surveyed 26 sites within the Blue Ridge Mountains with varying degrees of eastern hemlock composition, and HWA-induced decline. We combined these into a Hemlock Decline Index (HDI) that served as an explanatory variable for analyses. Results revealed that high HDI values were associated with higher LWD loads, higher frequency of LWD jams, and larger diameter LWD. These findings indicate that the HWA is significantly impacting LWD loads in streams, and subsequently impacting stream ecology. Additionally, the HDI developed here could be a useful tool for making regional comparisons of the impacts of the HWA on forest ecosystems. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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