Invasion
Invasion Description
1st Record: Quonochontaug Central Beach, Charlestown/RI/Block Island Sound (2009, Schneider 2010, plants washed up on beach after tropical storm 'Bill')
Geographic Extent
South Beach, Edgartown/MA/Atlantic Ocean (2012, Newton et al. 2013); Garbage Beach Breakwater, Woods Hole/Woods Hole Harbor (4/14/10, Savoie and Saunders 2013); Massachusetts Maritime AcademyMA/Buzzards Bay [2010, 2013, Mathieson 2016, 41 45N, 70 36 36 W); F.L. Tripp & Sons Marina, Westport/MA/Westport River (2010, 2013, 41 51 25N, 71 07 58W; Fort Adams State Park/Newport/RI/Narragansett Bay (2010, MacIntyre et al. 2010; Massachusetts Office of Coastal Zone Management 2013; Newton et al. 2013; Mathieson 2016); ; Fort Wetherill, Jamestown/RI/Narragansett Bay (2012, Newton et al. 2013); Port Edgewood Marina, Cranston/RI/Providence River (2013, Mathieson 2016, 41 46 57 N, 71 23 27 W [2013]; Allen Harbor Marina, North Kingston,/RI/Narragansett Bay (2010, 2013, Mathieson 2016, 41 37 N, 71 24 47 W); Southern Light, Block Island/RI/Atlantic Ocean (2012, Newton et al. 2013); oint Judith Marina, Wakefield/RI/Point Judith Pond (2010, 2013, Mathieson et al. 2016, 41 23 14 N, 71 31 20W ); Quonochontaug Central Beach, Charlestown/RI/Block Island Sound (2009, Schneider 2010); Watch Hill/RI/Block Island Sound (2009, Schneider 2010); Misquamicut/RI//Block Island Sound (2009, Schneider 2010); Point Judith/RI/Block Island Sound (2009, Schneider 2010); not found at other sampled sites, from Stonington CT to Sakonnet Point, RI (Schneider 2010); off of Old Lyme-Old Saybrook/CT/long Island Sound (12/2010?, James T. Carlton, personal communication); off of Old Lyme-Old Saybrook/CT/Long Island Sound (12/2010?, James T. Carlton, personal communication); Avery Point, Groton/CT/Long Island Sound (2012, Newton et al. 2013); Two Tree Island, Waterford/Long Island Sound (2012, Newton et al. 2013); Latimer Reef, off Southold, Long Island/NY/Long Island Sound (2012, Newton et al. 2013); Long Island/NY/Shinnecock Bay (by 2018, Young and Gobler 2021); Long Island South Shore Estuary Reserve/NY/Great South Bay (2018, )Young and Gobler 2021, 40.73 N, -73.05 W)
Vectors
| Level | Vector |
|---|---|
| Alternate | Ballast Water |
| Alternate | Hull Fouling |
Regional Impacts
| Ecological Impact | Competition | |
In the Virginian Province (south of Cape Cod), where D. japonica was first discovered in 2009, it has by 2012, become the third most abundant macroalga in subtidal communities, comprising on average, 7% of the community. At some locations, it had up to 52% coverage. Species richness was negatively correlated with D. japonica abundance (Newton et al. 2013). | ||
| Economic Impact | Fisheries | |
Dasysiphonia japonica has been clogging nets, lines, lobster and conch (whelk) plots in Rhode Island waters, causing serious problems for fishermen (National Fisherman 2014). | ||