Invasive Species in the Barnegat Bay Region - Georgian Court ...

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5/1/2013 Methods of Spread • Intentional introduction – Stabilize roadsides • Multiflora rose – Ornamental • Purple loosestrife Methods of Spread • Accidental Introduction – Carried into area in packing material, on planes or other vehicles Methods of Spread • Planes, trains and automobiles… and hikers too! • Garden escapees Methods of Spread – University of Washington study: Planted 19 wildflower seed mix packets. All contained from 3 - 13 species identified as invasive in some part of North America Methods of Spread • Ornamental Rocks and Fill 2
5/1/2013 What are the Main Problem Species in this Area • Emailed Monmouth and Ocean County Park officials • Asked for a list of “most hated” invasives • 4 detailed responses – Ken Thoman, Monmouth County Park Superintendent – Kevin Holcomb, Wildlife Biologist Forsythe National Park – Cynthia L. Coritz, Bass River State Forest – Robert Auermuller Wharton State Park Superintendent http://york.extension.psu.edu/NResources/Images/Ber%20th%20infst.jpg http://www.newfs.org/protect/invasive-plants/photo-gallery/Berberis%20thunbergii,%20Leslie%20J.%20Mehrhoff.jpg/image_preview Garden Escapees Japanese Barberry (Berberis thunbergii) • Decorative shrub valued for its attractive foliage and colorful berries • Each plant makes many seeds which are transported by birds to surrounding habitats. • Overgrows native shrubs and changes soil pH to make it less hospitable to native species Garden Escapees Chinese and Japanaese Wisterias (Wisteria sinensis, W. floribunda) • Hard woody vines twine tightly around host tree trunks and branches girdling and killing them • Vines can form dense thickets that smother and shade out native vegetation by numerous above-ground stems that develop roots and shoots The scope of the barberry invasion in this park is particularly easy to see in early spring • Negatively impacts wildlife dependent on native vegetation for forage, nesting, and cover http://farm4.static.flickr.com/3237/2939721819_ae496c1c2a.jpg Garden Escapees Yellow (Asian) Honeysuckles Lonicera spp. • Heady fragrance of these ornamental vines makes them a common choice for gardens • Birds spread seeds into surrounding wild areas where vines overgrow and choke native vegetation Wisteria killing a pine http://nyis.info/plants/Honeysuckle.aspx 3
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Page 5 and 6: 5/1/2013 English Ivy (Hedera helix)
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