AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Caulacanthus ustulatus [WoRMS] | |
Authority | (Mertens ex Turner) Kützing, 1843 | |
Family | Caulacanthaceae | |
Order | Gigartinales | |
Class | Florideophyceae | |
Phylum | Rhodophyta | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Ocean: Pacific --> Ocean region: NW Pacific |
Life form / Life stage (?) |
|
Sociability / Life stage (?) |
|
Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Asexual Sexual References: Ruennes, J. 1997. A culture study of Caulacanthus ustulatus (Caulacanthaceae, Gigartinales, Rhodophyta) from Europe and Asia. Cryptogamie, Algologie, 2, pp. 175-185. Comments: The apparent low frequency of sexual reproduction suggests effective vegetative propagation, probably by fragmentation and reattachment. |
Developmental trait (?) | Not entered |
Characteristic feeding method / Life stage (?) |
|
Mobility / Life stage (?) |
References (not structured): Zuccarello, G., West, J., Rueness, J. 2002. Phylogeography of the cosmopolitan red alga Caulacanthus ustulatus (Caulacanthaceae, Gigartinales). Phycological Research, 50(2), pp. 163-172. |
Salinity tolerance range (?) | Venice system: 4. β-Mesohaline [5-10psu] 5. α-Mesohaline [10-18psu] 6. Polymixohaline [18-30psu] 7. Euhaline [30-40psu] Comments: Caulacanthus ustulatus is considered euryhaline. Its presence in diverse habitats indicates a broad tolerance from brackish waters to fully marine conditions (approximately 5-35 ppt or higher). |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Smith, J. R., Vogt, S. C., Creedon, F., Lucas, B. J., Eernisse, D. J. 2014. The non-native turf-forming alga Caulacanthus ustulatus displaces space-occupants but increases diversity. Biological Invasions, 16, pp. 2195-2208. Comments: Algal turfs can increase habitat complexity, trap sediment, and maintain moisture during low tide which likely benefits meiofauna and seaweeds by providing food, habitat, or refuge from desiccation stress. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Anthropogenic chemical compounds References: Ii, H. 2015. CU, ZN and AS contamination of seaweed beside Shizuki and Kanayama metal mines in Japan. GEOMATE Journal, 9(17), pp. 1411-1417. |
Known human health impact? | Not known |
Known economic impact? | Not known |
Known measurable environmental impact? | Known References: Smith, J. R., Vogt, S. C., Creedon, F., Lucas, B. J., Eernisse, D. J. 2014. The non-native turf-forming alga Caulacanthus ustulatus displaces space-occupants but increases diversity. Biological Invasions, 16, pp. 2195-2208. Comments: Caulacanthus appears to displace macro invertebrates, such as barnacles, limpets, and periwinkles, while facilitating a more diverse array of meiofauna and macroalgae. |
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 (?) | Unknown Comments: Probably introduced by hull-fouling, ballast waters and oyster aquaculture. |
Last update by | Sandra Gečaitė, 2024-08-05 |