AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Symplegma brakenhielmi [WoRMS] | |
Authority | (Michaelsen, 1904) | |
Family | Styelidae | |
Order | Stolidobranchia | |
Class | Ascidiacea | |
Phylum | Chordata | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered References (not structured): Spyksma, A. J., Miller, K. I., Shears, N. T. 2024. Marine heatwave promotes population expansion of the invasive ascidian Symplegma brakenhielmi. Biological Invasions, pp. 1-9. Comments: Pantropical |
Life form / Life stage (?) |
References (not structured): Ramos-Esplá, A. A., Bitar, G., Sghaier, Y. R., Çinar, M. E., Deidun, A., Ferrario, J., Ulman, A. 2020. Symplegma (Ascidiacea: Styelidae), a non-indigenous genus spreading within the Mediterranean Sea: taxonomy, routes and vectors. |
Sociability / Life stage (?) |
References (not structured): Gutierrez, S., Brown, F. D. 2017. Vascular budding in Symplegma brakenhielmi and the evolution of coloniality in styelid ascidians. Developmental biology, 423(2), pp. 152-169. Comments: S. brakenhielmi is a widely distributed colonial tunicate in warm-temperate to tropical marine regions. |
Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Asexual Sexual References: Gutierrez, S., Brown, F. D. 2017. Vascular budding in Symplegma brakenhielmi and the evolution of coloniality in styelid ascidians. Developmental biology, 423(2), pp. 152-169. Comments: Colonial tunicates reproduce both asexually, by budding, and sexually, from fertilized eggs developing into larvae. Buds can form from the body wall of the zooid. |
Developmental trait (?) | Spawning Viviparous References: Ramos-Esplá, A. A., Bitar, G., Sghaier, Y. R., Çinar, M. E., Deidun, A., Ferrario, J., Ulman, A. 2020. Symplegma (Ascidiacea: Styelidae), a non-indigenous genus spreading within the Mediterranean Sea: taxonomy, routes and vectors. Mastrototaro, F., Montesanto, F., Salonna, M., Grieco, F., Trainito, E., Chimienti, G., Gissi, C. 2019. Hitch-hikers of the sea: concurrent morphological and molecular identification of Symplegma brakenhielmi (Tunicata: Ascidiacea) in the western Mediterranean Sea. Mediterranean Marine Science, 20(1), pp. 197-207. Comments: S. brakenhielmi showed an ovoviviparous mode in reproduction, with larvae development occurring in the parental atrial cavity before release. |
Characteristic feeding method / Life stage (?) |
References (not structured): Spyksma, A. J., Miller, K. I., Shears, N. T. 2024. Marine heatwave promotes population expansion of the invasive ascidian Symplegma brakenhielmi. Biological Invasions, pp. 1-9. Comments: As a colonial tunicate, it is a suspension feeder, filtering out phytoplankton and detritus. |
Mobility / Life stage (?) |
References (not structured): Ramos-Esplá, A. A., Bitar, G., Sghaier, Y. R., Çinar, M. E., Deidun, A., Ferrario, J., Ulman, A. 2020. Symplegma (Ascidiacea: Styelidae), a non-indigenous genus spreading within the Mediterranean Sea: taxonomy, routes and vectors. Comments: Symplegma brakenhielmi colonised both natural (infralittoral rocky bottoms, seagrass meadows and caves) and artificial habitats (harbours, marinas), between 0.5 and 17 m of depth. It was observed attached to many different substrates: rocks, seagrasses, ropes, pillars, ship hulls and on living invertebrates. |
Salinity tolerance range (?) | Venice system: 6. Polymixohaline [18-30psu] 7. Euhaline [30-40psu] |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Gutierrez, S., Brown, F. D. 2017. Vascular budding in Symplegma brakenhielmi and the evolution of coloniality in styelid ascidians. Developmental biology, 423(2), pp. 152-169. |
Toxicity / Life stage (?) | Unknown Comments: Not available. |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Not known Comments: Not available. |
Known economic impact? | Not known Comments: Not available. |
Known measurable environmental impact? | Not known Comments: Not available. |
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 (?) | Biofouling References: Ramos-Esplá, A. A., Bitar, G., Sghaier, Y. R., Çinar, M. E., Deidun, A., Ferrario, J., Ulman, A. 2020. Symplegma (Ascidiacea: Styelidae), a non-indigenous genus spreading within the Mediterranean Sea: taxonomy, routes and vectors. |
Last update by | Sandra Gečaitė, 2024-08-21 |