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AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
| Species | Dasysiphonia japonica [WoRMS] | |
| Authority | (Yendo) H.-S.Kim, 2012 | |
| Family | Dasyaceae | |
| Order | Ceramiales | |
| Class | Florideophyceae | |
| Phylum | Rhodophyta | |
| Synonym (?) | Heterosiphonia japonica | |
| Sub-species level (?) | Not entered |
| Native origin (?) | Ocean: Pacific --> Ocean region: NW Pacific References (not structured): Sjøtun, K., Husa, V., & Peña, V. (2008). Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions, 3(4), 377-394. |
| Life form / Life stage (?) |
References (not structured): Sjøtun, K., Husa, V., & Peña, V. (2008). Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions, 3(4), 377-394. Comments: Epiphyte on hard substrates, bivalve shells. Fragments can be found in the phytoplankton and transported by currents. |
| Sociability / Life stage (?) |
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| Reproductive frequency (?) | Iteroparous |
| Reproductive type (?) | Asexual Sexual References: Sjøtun, K., Husa, V., & Peña, V. (2008). Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions, 3(4), 377-394. Husa, V., & Sjøtun, K. (2006). Vegetative reproduction in “Heterosiphonia japonica”(Dasyaceae, Ceramiales, Rhodophyta), an introduced red alga on European coasts. Botanica Marina, 49(3), 191-199. Comments: Asexual growth by fragmentation Gametophytes are found in laboratory but hardly in nature |
| Developmental trait (?) | Unknown |
| Characteristic feeding method / Life stage (?) |
References (not structured): Sjøtun, K., Husa, V., & Peña, V. (2008). Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions, 3(4), 377-394. |
| Mobility / Life stage (?) |
References (not structured): Sjøtun, K., Husa, V., & Peña, V. (2008). Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions, 3(4), 377-394. Comments: Epiphyte on hard substrates, bivalve shells. Fragments can be found in the phytoplankton and transported by currents. |
| Salinity tolerance range (?) | Venice system: 6. Polymixohaline [18-30psu] 7. Euhaline [30-40psu] References: Sjøtun, K., Husa, V., & Peña, V. (2008). Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions, 3(4), 377-394. Comments: growth is limited at salinities lower than 15 psu |
| Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Streftaris, N., & Zenetos, A. (2006). Alien marine species in the Mediterranean-the 100 ‘Worst Invasives’ and their impact. Mediterranean Marine Science, 7(1). Comments: impacts on fisheries and aquaculture |
| Toxicity / Life stage (?) |
References: Young, C. S., Lee, C. S., Sylvers, L. H., Venkatesan, A. K., Gobler, C. J. 2022. The invasive red seaweed, Dasysiphonia japonica, forms harmful algal blooms: Mortality in early life stage fish and bivalves and identification of putative toxins. Harmful Algae, 118, 102294. Comments: Dasyiphonia japonica produce exudates that can inhibit the growth of the noxious brown tide picoplankter Aureococcus anophagefferens. 'Red colored' exudates from D. japonica were toxic to crustacean herbivores. |
| Bioaccumulation association (?) | Unknown |
| Known human health impact? | Known Comments: Dasysiphonia japonica, is an invasive seaweed that can release hydrogen sulfide gas and thus is both a human health threat and a threat to aquatic life. |
| Known economic impact? | Not known |
| Known measurable environmental impact? | Known References: Young, C. S., Lee, C. S., Sylvers, L. H., Venkatesan, A. K., Gobler, C. J. 2022. The invasive red seaweed, Dasysiphonia japonica, forms harmful algal blooms: Mortality in early life stage fish and bivalves and identification of putative toxins. Harmful Algae, 118, 102294. |
| Included in the Target Species list? | No References: HELCOM, 2009. Alien Species and Ballast Water [PDF]. Available at: (https://archive.iwlearn.net/helcom.fi/stc/files/shipping/Table_2_Alienspecies_%20lists_2009.pdf) |
| Association with vessel vectors (?) | Ballast waters Biofouling References: Sjøtun, K., Husa, V., & Peña, V. (2008). Present distribution and possible vectors of introductions of the alga Heterosiphonia japonica (Ceramiales, Rhodophyta) in Europe. Aquatic Invasions, 3(4), 377-394. Comments: In warer European waters its introduction is linked to shellfish trade; in North Sea and Scandinavia, however, it seems more likely transported via vessels. Fragments were bserved alive in ballast waters in some ships from Asia to Europe (France); it is also possible that it came attached on hulls as biofouling. |
| Last update by | Sandra Gečaitė, 2024-08-05 |