AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Schizoporella japonica [WoRMS] | |
Authority | Ortmann, 1890 References (not structured): Bock, P. (2013). Schizoporella japonica Ortmann, 1890. In: Bock, P.; Gordon, D. (2013) World List of Bryozoa. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=470388 on 2013-11-19 |
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Family | Schizoporellidae | |
Order | Cheilostomatida | |
Class | Gymnolaemata | |
Phylum | Bryozoa | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Ocean: Pacific --> Ocean region: NW Pacific |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
References (not structured): Loxton, J., Wood, C. A., Bishop, J. D., Porter, J. S., Spencer Jones, M., Nall, C. R. 2017. Distribution of the invasive bryozoan Schizoporella japonica in Great Britain and Ireland and a review of its European distribution. Biological Invasions, 19, pp. 2225-2235. Comments: chizoporella japonica is an encrusting species which forms bright orange-red, calcified crusts with distinctive foliose lobes in well-developed colonies. |
Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Asexual Sexual References: Loxton, J., Wood, C. A., Bishop, J. D., Porter, J. S., Spencer Jones, M., Nall, C. R. 2017. Distribution of the invasive bryozoan Schizoporella japonica in Great Britain and Ireland and a review of its European distribution. Biological Invasions, 19, pp. 2225-2235. Comments: Each colony begins with a single, sexually produced, primary zooid, which then buds asexually to form unilaminar or bilaminar sheets. Schizoporella japonica is hermaphroditic and bright orange embryos are brooded in external brood chambers (ovicells). |
Developmental trait (?) | Brooding Lecithotrophy References: Loxton, J., Wood, C. A., Bishop, J. D., Porter, J. S., Spencer Jones, M., Nall, C. R. 2017. Distribution of the invasive bryozoan Schizoporella japonica in Great Britain and Ireland and a review of its European distribution. Biological Invasions, 19, pp. 2225-2235. Comments: Larvae of the congeneric S. errata are lecithotrophic, and have a short planktonic period. |
Characteristic feeding method / Life stage (?) |
Comments: he zooids feed by extending the ciliated tentacles of the lophophore as a funnel, creating a current, and driving food particles into their mouths. The food is guided along the tentacles and through the pharynx by the cilia. Larger food particles can be moved or captured by flicking or contracting the tentacles. |
Mobility / Life stage (?) |
References (not structured): Loxton, J., Wood, C. A., Bishop, J. D., Porter, J. S., Spencer Jones, M., Nall, C. R. 2017. Distribution of the invasive bryozoan Schizoporella japonica in Great Britain and Ireland and a review of its European distribution. Biological Invasions, 19, pp. 2225-2235. Comments: S. japonica is predominantly found intertidally on rocks, boulders and shellfish, although worldwide it has diversified onto man-made hard substrates such as pilings, hulls and pontoons. |
Salinity tolerance range (?) | Exact range: 15 - 35 References: Accs.uaa.alaska.edu (n.d.) Schizoporella japonica. Available at: https://accs.uaa.alaska.edu/wp-content/uploads/schizoporellajaponica.pdf (Accessed: 23 July 2024). Comments: This species has been found in waters > 15 ppt, and in marine waters (e.g. the Gulf of Alaska). Although upper salinity tolerances are unknown, we assume that this species can tolerate salinities up to 35 ppt. |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Loxton, J., Wood, C. A., Bishop, J. D., Porter, J. S., Spencer Jones, M., Nall, C. R. 2017. Distribution of the invasive bryozoan Schizoporella japonica in Great Britain and Ireland and a review of its European distribution. Biological Invasions, 19, pp. 2225-2235. Comments: It is considered to be an ‘ecosystem engineer’ due to its ability to form massive encrustations, overgrow other organisms and modify habitat characteristics. |
Toxicity / Life stage (?) | Not relevant |
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? | Known References: Loxton, J., Wood, C. A., Bishop, J. D., Porter, J. S., Spencer Jones, M., Nall, C. R. 2017. Distribution of the invasive bryozoan Schizoporella japonica in Great Britain and Ireland and a review of its European distribution. Biological Invasions, 19, pp. 2225-2235. Comments: It is a strong competitor for space and is known to inhibit the growth of adjacent species |
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: Possible by biofouling. |
Created by | Dan Minchin, 2013-11-19 |
Last update by | Sandra Gečaitė, 2024-07-23 |