AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Aplidium glabrum [WoRMS] | |
Authority | (Verrill, 1871) | |
Family | Polyclinidae | |
Order | Aplousobranchia | |
Class | Ascidiacea | |
Phylum | Chordata | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Ocean: Arctic |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
Comments: It is a colony-forming species with a striking sponge-like appearance. The colonies have the shape of crusty lumps, are slightly translucent and can be grey, yellow or even orange (caused by the presence of larvae) in colour. |
Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Asexual Sexual References: Durante, K. M., Sebens, K. P. 1994. Reproductive ecology of the ascidians Molgula Citrina Alder & Hancock 1848 and Aplidium Glabrum (verrill 1871) from the gulf of maine, USA. Ophelia, 39(1), pp. 1-21. Comments: Periods of peak asexual reproduction in A. glabrum generally occurred when ascidians were not reproducing sexually. |
Developmental trait (?) | Spawning References: Durante, K. M., Sebens, K. P. 1994. Reproductive ecology of the ascidians Molgula Citrina Alder & Hancock 1848 and Aplidium Glabrum (verrill 1871) from the gulf of maine, USA. Ophelia, 39(1), pp. 1-21. |
Characteristic feeding method / Life stage (?) |
Comments: Sea squirts are filter-feeders. Water, carrying numerous small food particles, flows through their oral siphon to the inside of the sea squirt. These particles get caught in mucus produced by a gland called the endostyle. Their waste flows out of their body via the atrial siphon. |
Mobility / Life stage (?) |
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Salinity tolerance range (?) | Unknown Comments: Not available. |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Sanamyan, K.E. 2000. Three related Aplidium species from the Southern Kurile Islands (Ascidiacea: Polyclinidae). Zoosystematica Rossica, 8(2), 1999, pp. 211-216. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown References: Osborne, K. L., Poynton, H. C. 2019. Copper pollution enhances the competitive advantage of invasive ascidians. Management of Biological Invasions, 10(4), 641–656. Comments: Colonial ascidians, in particular, have broad environmental tolerances that allow them to invade novel ecosystems including urban harbors. |
Known human health impact? | Known Comments: Harmless. |
Known economic impact? | Known References: VLIZ Alien Species Consortium. 2020. Aplidium glabrum. Non-indigenous species in the Belgian part of the North Sea and adjacent estuaries anno 2020. Flanders Marine Institute (VLIZ). 5 pp. Comments: This species is part of the biofouling community. Fouling can affect various substrates and even cause economic damage. Preventing their attachment to ship hulls via cleaning and treatment with antifouling paint is very expensive. |
Known measurable environmental impact? | Not known Comments: Effects on the natural environment are unknown. |
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 [Accessed 1 July 2024]. |
Association with vessel vectors (?) | Unknown References: VLIZ Alien Species Consortium. 2020. Aplidium glabrum. Non-indigenous species in the Belgian part of the North Sea and adjacent estuaries anno 2020. Flanders Marine Institute (VLIZ). 5 pp. Comments: It grows on ropes, quays, pontoons and other hard substrates. Most likely, the species got introduced via the oyster import. |
Molecular information | Available NCBI (https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?term=Aplidium+glabrum) |
Last update by | Sandra Gečaitė, 2024-08-02 |