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Invasive Species

 

The definition of an invasive species is a plant or animal that is non-native to the ecosystem, and whose introduction causes or is likely to cause economic or environmental harm or harm to human health. In the latter case, the harm must significantly outweigh any benefits. Many of Long Island’s species of plants and animals are non-native. Only a small percentage of these cause the harm necessary to be deemed invasive.

Invasive plants and animals are one of the most serious and pervasive threats to native species and ecosystems on Long Island. Invasives spread into natural areas and out-compete, damage and often eliminate native species, and the wildlife that depend on them. Unchecked, invasives will disrupt ecosystem patterns and processes, such as hydrology, nutrient cycling, frequency and intensity of wildfires (necessary to some ecosystems on Long Island), natural succession, and soil erosion. Every ecosystem on Long Island, whether terrestrial or aquatic, is threatened by these biological invasions.

Nassau County is focused on managing invasive species through prevention of new invasions, early detection and rapid response to new invasions, and control or eradication of existing invasions.

The four components of an invasive species program are:

1) preventing future introductions;
2) planning response measures to future introductions that might occur despite preventative measures;
3) limiting the harmful impacts of introductions that have already occurred; and
4) educating the public and industry about the issues and concerns relating to invasive species introductions.

Nassau County Legislature passed and the County Executive signed Local Law 22 - 2007 to ban the sale or distribution of 63 harmful invasive plant species within the County. The following species are currently included on the County's "Do Not Sell List."

 

 Scientific Name   Common Name 
 Alliariapetiolata   Garlicmustard 
 Ampelopsis brevipedunculata   Porcelainberry 
 Anthriscus sylvestris    Wildchervil  
 Araliaelata   Japaneseangelicatree  
 Artemisiavulgaris    Mugwort, common wormwood 
 Cabombacaroliniana   Carolinafanwort; cabomba 
 Cardamineimpatiens    Narrowleaf bittercress  
 Caulerpataxifolia   Marine"killeralgae"  
 Celastrus orbiculatus    Orientalbittersweet 
 Centaureastoebe   Spotted knapweed 
 Cirsium arvense   Canada thistle 
 Cynanchum louiseae   Blackswallowwort 
 Cynanchumrossicum   Paleswallowwort 
 Egeriadensa   Brazilian waterweed 
 Elaeagnus angustifolia   Russian olive 
 Elaeagnus umbellata   Autumn Olive 
 Euphorbiacyparissias    Cypress spurge 
 Euphorbiaesula   Leafy spurge 
 Froelichiagracilis    Cottonweed 
 Glaucium flavum   Seapoppy, yellowhornedpoppy 
 Glossostigmadiandrum   Mudmat  
 Heracleum mantegazzianum   Giant hogweed 
 Hesperis matronalis    Dame's rocket 
 Humulus japonicus    Japanesehops  
 Hydrillaverticillata   Hydrilla 
 Hydrocharis morsusranae    Europeanfrogbit (aquatic) 
 Impatiens glandulifera   Tall impatiens; purplebalsam 
 Lepidium latifolium   Tallpepperweed,perennialpepperweed 
 Lespedezacuneata   Chineselespedeza  
 Ligustrumobtusifolium   Border privet 
 Ludwigiagrandiflora   Waterprimrose 
 Ludwigiapeploides    Floatingprimrosewillow; waterpurslane 
 Lythrum salicaria   Purpleloosestrife 
 Microstegium vimineum   Japanesestilt grass  
 Myosotis scorpioides    Forgetmenot 
 Microstegium vimineum   Japanesestilt grass  
 Myriophyllumaquaticum   Parrot feather, Brazilian watermilfoil 
 Myriophyllum spicatum   Eurasian watermilfoil 
 Najas minor Allioni   Eutrophicwaternymph 
 Nelumbo nucifera   Pinklotus  
 Nymphoides peltata   Yellowfloatingheart 
 Paulowniatomentosa   Princess tree  
 Phalaris arundinacea   Reedcanarygrass  
 Phragmites australis    Common reedgrass (nonnativegenotype) 
 Polygonumcuspidatum   Japaneseknotweed 
 Polygonumperfoliatum   Mileaminutevine 
 Polygonum sachalinense   Giant knotweed  
 Potamogeton crispus    Curly leaf pondweed 
 Puerariamontana   Kudzu 
 Ranunculus ficaria   Lessercelandine 
 Rhamnus cathartica   Common buckthorn 
 Rosamultiflora   Multiflorarose 
 Rubus phoenicolasius    Wineberry 
 Salviniamolesta   Giant salvinia 
 Senecio jacobaea   Tansy ragwort; stinkingwillie 
 Silphium perfoliatum   Cupplant 
 Trapa natans    Waterchestnut 
 Vitex rotundifolia   Beach vitex; roundleaf chastetree 
 Loniceraxbella   Bell's honeysuckle 
 Loniceramorrowii   Morrow's honeysuckle 
 Loniceramaackii   Amur honeysuckle 
 Lonicerajaponica    Japanesehoneysuckle 
 Loniceratatarica    Tartarian honeysuckle 
 Loniceraxylosteum   Dwarf, Fly honeysuckle 
 Myosotis scorpioides    Forgetmenot(aquatic) 

 

South Shore Ponds - $20 Million in Projects

In addition to invasive species management, Nassau County has implemented $20 million worth of pond improvements that are either completed or are in construction along the south shore.  Nassau County has and will be receiving reimbursement from New York State in the amount of $3.7 Million.  The projects include:

Pond ProjectsCamman’s Pond:  Re-bulkheaded the eastern shoreline utilizing recycled plastic lumber.  Park improvements included new paths, benches trash receptacles and landscaping. Project cost:  $650,000

Milburn Pond:  Dredged approximately 14,000 cubic yards of sediment, construction of a sediment capture basin, new pond walls in some areas and landscaped banks in others.  New pathways, benches, trash receptacles, pond aeration and landscaping features were also included in the project.  Project cost: $3.3 million, of which $437,500 were a NYS Clean Water/Clean Air Bond Act award

 

Tanglewood Pond and Preserve:  Dredged main pond as well as rehabilitation of two sedimentation basins.  New brick paver pathways surround the pond leading to a fishing pier.  A nature trail through a wooded preserve area includes several small bridges over a small stream.  The pond edge was replanted with new native wetland grasses plants and shrubs including cardinal flower, cattail and pond aeration were added.  Project cost: $1.2 Million, of which $600,000 were a NYS Clean Water/Clean Air Bond Act award

Loft’s Pond:  Hydraulic dredging of several thousand cubic yards of sediment from the pond, aquatic harvesting of aquatic vegetation, new pond shoreline plantings, pathways, benches, trash receptacles.  A new boardwalk over water was also featured as well as a new gazebo and park lighting.  Project cost: $1.2 Million, of which $400,000 were a NYS Clean Water/Clean Air Bond Act award

Silver Lake: Hydraulic dredging of several thousand cubic yards of sediment from the pond, aquatic harvesting of aquatic vegetation, new pond shoreline plantings, pathways, benches, trash receptacles, and lighting.  Project cost: $1.2 Million, of which $200,000 were a NYS Clean Water/Clean Air Bond Act award

Mill Pond: Hydraulic dredging of several thousand cubic yards of sediment from the pond, aquatic harvesting of aquatic vegetation, new pond shoreline plantings, pathways, benches, trash receptacles.  Project cost: $1.2 million, of which $300,000 were a NYS Clean Water/Clean Air Bond Act award

Roosevelt Pond:  Constructed a sedimentation basin, new pond wall, some hydraulic dredging, planted native wetland grasses and plants as well as upland shrubs along the shoreline.  New pathways, benches, trash receptacles and lighting were also added.  Project cost: $2.2 Million, of which $437,500 were a NYS Clean Water/Clean Air Bond Act award

Massapequa Preserve:  This major renovation project is currently underway.  It is comprised of multiple components, including streamflow augmentation, stormwater treatment and bioengineering treatments of the streambank along Massapequa Creek.  Partial dredging of the Massapequa Reservoir will occur later this year.  Projected total cost: $8 million dollars, of which $1.3 Million were a NYS Clean Water/Clean Air Bond Act award

 
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