Distribution, Habitats, and Mortality of Ash (Fraxinus spp ... · Distribution, Habitats, and...
Transcript of Distribution, Habitats, and Mortality of Ash (Fraxinus spp ... · Distribution, Habitats, and...
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Photo by Jason Harrison
Distribution, Habitats, and Mortality of Ash (Fraxinus spp.) in Maryland
Christopher Frye, State BotanistWildlife and Heritage Service
Natural Heritage Program
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The Basics…
Six species of Ash in Maryland Ranging from multi-stemmed small trees to large canopy trees Other species in the plant Family include Privets, Lilac, and Forsythia
This presentation will:
1. Provide a brief overview of 5 of the species2. Then focus on Green Ash and Marshyhope Creek3. Conclude with some general concerns
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Fraxinus americana (White Ash)
Distribution maps provided by The Biota of North America Program (bonap.org)
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Bark shedding on White Ash after EAB infestation
Photo: Jim Brighton
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Visual signs of EAB infestation on White Ash
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Dead White Ash in Allegany County
95-99% mortality
Seedlings and saplings are still abundant in the understory.
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Fraxinus caroliniana (Carolina Ash)
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Photo by Jim Brighton
Carolina Ash at Porters Crossing, Worcester County, MD
Rare and restricted to areas along the Pocomoke.
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Fraxinus nigra (Black Ash)
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Photo: Jason Harrison
Black Ash in Gravel Hill Swamp, Frederick County
Localized and patchy in Maryland.
Generally associated with nutrient-rich soils high in calcium.
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Fraxinus profunda (Pumpkin Ash)
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Photo by Peter Stango
Pumpkin Ash along the Pocomoke River
Occurs along outer fringe of tidal swamp forests
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Fraxinus pennsylvanica (Green Ash)
Wide-ranging in the US and extremely common in most states.
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MarshyhopeCreekDrains ~220 square miles
~37 miles long through Delaware and Maryland
36% forested wetland
61% agricultural land
~2% urban
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University of Delaware Water Resources Center.
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Idylwild Wildlife Management Area
~3577 acres of bottomland swamp and adjacent uplands
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Floodplain of Marshyhope Creek below Noble Bridge in Caroline County.
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Green Ash stand in a backswampalong the Marshyhope
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Impacts to floodplain plant communities ?
Photo: Jason Harrison
Large increase in sunlightNew habitat for invasivesUnknown replacement timeLarge increase in tree fall and potential damming
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Chionanthus virginicus (Old-mans Beard)
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Impacts to wildlife ?
Altered spawning migration patterns.Altered stream habitat diversity.Mating and nesting site availability.Altered prey diversity and abundances
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Ecosystem (Chesapeake Bay) impacts ?
Large amounts of decaying woody debris
in the riparian zone.
Increased flow of suspended solids.
Increase in nutrient load.
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Photo: Jason Harrison
Thanks for listening.