Attachment_1__Noxious_and_Invasive_Species_List.docx

Categories of Invasive Plant Infestations Known to Occur Within the Coos Bay District The following Categories of known or estimated invasive plant sites that are currently known to occur on the Coos Bay District. Invasive plant surveys on the District generally focus on locations where invasive plants are most likely to occur and spread from, such as road corridors and other rights-of-way, riparian areas, campgrounds, and mining and common materials sites. The BLM also conducts surveys in advance of planned projects, such as forest management projects, so that the District can take measures to prevent the introduction and spread of invasive plants into and from project areas. The BLM also maps and documents invasive plant infestations detected during implementation monitoring for forest management, engineering, recreation, and other ground-disturbing projects. BLM policy requires monitoring of new project areas with high likelihood of noxious weed introduction for the first three years after completion (USDI 1992b).

Survey and inventory results are uploaded to the BLM’s National Invasive Species Information Management System (NISIMS), which links to BLM planning and reporting systems. NISIMS records include the infestation’s spatial location, size, and shape; the invasive plant’s abundance and distribution pattern; treatment records; and other associated characteristics. Sites where the species appears to have been eradicated are retained in NISIMS to guide future site monitoring. As the current program is focused on noxious weeds, most data in NISIMS concern noxious weeds.

This document includes known locations of invasive plants mapped in NISIMS on the District. The most prevalent species are brooms, thistles, and blackberry. As shown in Table 1-1, which includes 35 different invasive plant species mapped in NISIMS on 18,100 gross acres on 19,284 sites on the District. As shown in Figure 1-1, the gross infested area is the area of land defined by drawing a line around the general perimeter of the infestation and does not reflect the canopy cover of the plants.

This area may contain large areas of land that are not occupied by an invasive plant species. Net acres are the actual infestation within the area. In some areas, a large area may have a sparse infestation and net acres would be calculated by multiplying the gross acres by the percent cover of the infestation. In addition, to the mapped acres, this Category includes species and infestations known to occur on the District but are not mapped in NISIMS. These species are generally widespread and dispersed throughout the District. District botany, invasive plant, and silviculture staff estimated these unmapped areas based on their professional judgement and field experience and while the locations have not been mapped, it is possible to characterize the areas and habitat where invasive plant species may occur. This includes additional unmapped sites for all mapped species, as well as an additional 47 invasive plant species. The majority of the species that are not mapped are not listed as noxious weeds (and hence have not been part of the existing integrated weed management program; thus, they generally have not been recorded during surveys or in NISIMS). While the precise acreage occupied by these species on the Coos Bay District is unknown, the treatment acres column in Table 1-1 indicates how many gross acres are estimated to be in need of treatment.

Integrated Invasive Plant Management for the Coos Bay District Environmental Assessment Chapter 2 - Integrated Invasive Plant Management and the Alternatives pages 23-29

Table 2-1. Summary of Known Invasive Plant Sites

Common Name Scientific Name

NISIMS

Gross/Net Acres1 (Sites)

American/European sea- rocket Cakile edentula/C. maritima

None

Mustard Family

North Spit, New River, dunes

No

High

Annual ryegrass Lolium multiflorum

Grasses North Spit, New River, Dean Creek, Spruce Reach Island

Biddy-biddy Acaena novae-zealandiae 18.33/1.50 (16)

Misc. Herbaceous Indian Creek, Cape Blanco, New River, roadsides, disturbed areas where there is little competition

Yes (Oregon)

Highest

Big quakinggrass Briza maxima

None

Reach Island, roadsides

No

Moderate

Bigleaf/common periwinkle Vinca major/V. minor 0.10/0.01 (1)

Herbaceous

Birdsfoot trefoil Lotus corniculatus/ L. angustissimus/ L. pedunculatus

2.57/0.14 (4)

Pea Family roadsides, meadows, riparian areas, disturbed areas

No

Low

Blessed milkthistle Silybum marianum

Brome fescue Vulpia bromoides

Bull thistle Cirsium vulgare 999.89/30.51 (2,825)

High

Burdock Arctium minus

Family roadsides, disturbed areas along forest edges

Butterfly bush Buddleja davidii

Calla lily Zantedeschia aethiopica 0.00/0.00 (1)

No

Low

Canada thistle Cirsium arvense 188.02/5.70 (558)

Family roadsides, harvest areas, open disturbed areas Yes (Oregon) High

Cape ivy Delairea odorata

None

Woody Species Pistol River School, Myers Creek Road, coastal bluffs and forests below 660' including on serpentine soil

Yes (Oregon)

Highest

Catchfly Silene gallica

Coastal burnweed Erechtites (Syn. Senecio) minimus

None

Sunflower Family roadsides, harvest units Yes (County)

Moderate

Common ragweed Ambrosia artemisiifolia

Common sow thistle Sonchus oleraceus

Corn spurry/sandspurry Spergula arvensis/ Spergularia maritima/S.

rubra

None

Carnation Family

North Spit, New River, dunes

No

Moderate

Cotoneaster Cotoneaster franchetii/C. lacteus

None

Woody Species roadsides, forest edges

No

Moderate

Creeping buttercup Ranunculus repens

Creeping yellow cress Rorippa sylvestris

Family Hunter Creek ACEC, riparian, marsh Yes (Oregon) Moderate

Dandelion Taraxacum officinale

Darwin’s barberry Berberis darwinii

English holly Ilex aquifolium

English/Atlantic ivy Hedera helix 24.63/0.41 (28)

Species forested areas, roadsides, riparian areas Yes (Oregon) High

European beachgrass Ammophila arenaria 58.73/26.54 (13)

High

Evergreen/cutleaf blackberry Rubus laciniatus 63.34/3.31 (315)

Woody Species roadsides, riparian areas Yes (County)

High

False brome Brachypodium sylvaticum

False dandelion Hypochaeris radicata/H. glabra

None

No

Lowest

Fennel Foeniculum vulgare 0.10/0.00 (1)

Perennial Parsley Family North Spit Boat Ramp, Umpqua Eden cultural site, roadsides, waste areas Yes (County)

High

Field bindweed Convolvulus arvensis

French broom Genista monspessulana 370.62/12.60 (329)

High

Giant knotweed Polygonum sachalinense 1.10/0.01 (10)

Rivers Yes (Oregon)

High

Gorse Ulex europaeus

Hawkbit Leontodon saxatalis

Herb Robert Geranium robertianaum 77.12/5.83 (206)

Island, New River, roadsides, stabilized dunes Yes (Oregon)

Moderate

Himalayan blackberry Rubus armeniacus

Hyssop loosestrife Lythrum hyssopifolia

Iceplant Carpobrotus chilensis

Herbaceous Cape Blanco, coastal headlands

Sunflower Family roadsides, open areas Yes (Oregon)

Highest

Japanese knotweed Polygonum cuspidatum 11.10/0.11 (89)

Rivers Yes (Oregon)

High

Jubata grass Cortaderia jubata

0.60/0.00 (9)

Perennial Grasses North Spit, New River, roadsides, dunes, coastal bluffs and headlands, timber harvest areas

Yes (Oregon)

High

Lance-leaved plantain Plantago lanceolata

Herbaceous

Marestail/horseweed Conyza bonariensis

Meadow knapweed Centaurea x moncktonii

Montbretia Crocosmia x crocosmiflora

None

Lilies, Iris, Sedges, Rushes roadsides, forest edges

No

Moderate

Old man's beard Clematis vitalba

Old-man-in-the-spring Senecio vulgaris

One seed hawthorn Crataegus monogyna 1.58/0.37 (2)

Species

(County) Moderate

Oxeye daisy Leucanthemum vulgare

3.35/0.25 (4)

Sunflower Family North Spit, New River, Dean Creek, Spruce Reach Island, Hunter Creek, roadsides, meadows

No

Low

Pampas grass Cortaderia selloana

None

roadsides, dunes, bluffs, road cuts, harvest areas

No

High

Pennyroyal Mentha pulegium

Perennial peavine Lathyrus latifolia

Perennial ryegrass Lolium perenne

Grasses North Spit, New River, Dean Creek, Spruce Reach Island

Poison hemlock Conium maculatum

None

Moderate

Purple deadnettle Lamium purpureum

None

Misc. Annual Herbaceous Dean Creek, Spruce Reach, open moist areas

No

Low

Purple loosestrife Lythrum salicaria 17.09/1.44 (29)

Loosestrifes Dean Creek, Spruce Reach Island, wetlands, wetland areas Yes (Oregon)

Highest

Rat-tail fescue Vulpia myuros

Reed canarygrass Phalaris arundinacea

Ripgut brome Bromus diandrus

None

roadsides.

No

Moderate

Rose campion Lychnis coronaria

Saltmeadow rush Juncus gerardi ssp. gerardi

Scotch broom Cytisus scoparius 9,961.22/1,190.50 (9,887)

2,000

High

Sheep sorrel Rumex acetosella

None

Creek, Spruce Reach Island, roadsides

No

Moderate

Silver wattle Acacia dealbata 0.12/0.02 (2)

Species

(County) Highest

Spiny sow thistle Sonchus asper

Spotted knapweed Centaurea stoebe

Spotted medick Medicago arabica

St. Johnswort Hypericum perforatum 11.99/0.31 (29)

Herbaceous

(Oregon) Moderate

Stinging nettle Urtica dioica ssp. dioica

Subterranean clover Trifolium subterraneum

None

Pea Family North Spit, New River, Dean Creek, Spruce Reach Island, roadsides

No

Low

Sweet vernal grass Anthoxanthum odoratum

None

No

Low

Tall fescue Schedonorus arundinaceus

Grasses New River, coastal scrub, roadsides, ditches

Tansy ragwort Senecio jacobaea

Teasel/Fuller's teasel Dipsacus fullonum

Three-sided leek Allium triquetrum

None

Lilies, Iris, Sedges, Rushes roadsides, meadows

No

Moderate

Tree-of-heaven Ailanthus altissima

Velvetgrass Holcus lanatus

White/yellow sweetclover Melilotus albus/M. officianalis 20.51/7.89 (69)

Pea Family roadsides

No

Moderate

Wild radish Raphanus raphanistrum/R. sativas

None

No

High

Woodland tansy Senecio sylvaticus

Yellow flag iris Iris psuedacorus 0.00/0.00 (1)

Highest

Yellow glandweed Parentucellia viscosa

Family

(County) Low

Yellow nutsedge Cyperus esculentus

None

Lilies, Iris, Sedges, Rushes

North Spit Yes (Oregon)

High

Yellow starthistle Centaurea solstitialis

Family roadsides, river gravels, dunes Yes (Oregon) Highest

1. Acres are rounded to two decimal places; acres that are shown as 0.00 are smaller than 0.005 acres.

2. Species of invasive plants that would be treated in the same manner have been arranged into treatment groups. Further information about treatment methods for these treatment groups can be found in Table 2-10, Treatment Key.

3. Noxious weeds are classified by the ODA or Coos, Curry, or Douglas County for the purpose of prioritizing and implementing noxious weed control projects. “Oregon” indicates that the plant species is listed as a noxious weed by the ODA, and “County” indicates that the species is listed as a noxious weed by one or more of the counties in the District. Under the No Action Alternative, only species that are listed as noxious weeds can be treated.

4. See Prioritization of Treatments, under Planning, later in this chapter for more information. Highest: treat for eradication; high: treat for control and then to reduce the existing infestation; moderate: treat for containment; low: treat to prevent spread to other areas.