Invasion
Invasion Description
1st Record: Groton, Avery Point/CT/Long Island Sound Groton/CT/Fisher's Island Sound (1970s, (R. Whitlatch to James T. Carlton, personal communication, 2002)
Geographic Extent
Groton, Avery Point/CT/Long Island Sound Groton/CT/Fisher's Island Sound (1970s, (R. Whitlatch to James T. Carlton, personal communication, 2002; Osman and Whitlatch 1995); Brewer Mysyic Marina, Mystic/CT/Fishers Island Sound (209, Pederson et al. 2021)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
Regional Impacts
| Ecological Impact | Competition | |
| In experiments in Long Island Sound, Diplosoma listerianum significantly reduced recruitment of native Spirorbis spp., Bugula spp., and Balanus spp., mostly through overgrowth of newly settled individuals (Osman and Whitlatch 1995). Diplosoma listerianum also significantly reduced recruitment of non-indigenous Botryllus schlosseri and Botrylloides violaceus, mostly through overgrowth of newly settled individuals (Osman and Whitlatch 1995). Diplosoma listerianum was a strong competitior in filling up empty space on foulng plates (Stachowicz et al. 2002). In years with abnormally warm winters, D. listerianum creates a community which it dominates, having lower biodiversity than native-dominated communities (Munguia et al. 2011). | ||