AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species |
Caulerpa webbiana References: Montagne (1838) De l'organization et du mode de reproduction des Caulerptes et en particulier de Caulerpa webbiana. Ann.Sci. Nat. 2. (tome IX). Goldstein M, Morrall SMS, GAMETOGENESIS AND FERTILIZATION IN CAULERPA Annals New york academy of sciences Volume 175, Issue 1, pages 660–672, July 1970 |
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Authority | Montagne, 1837 References (not structured): Montagne (1838) De l'organization et du mode de reproduction des Caulerptes et en particulier de Caulerpa webbiana. Ann.Sci. Nat. 2. (tome IX) |
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Family | Caulerpaceae | |
Order | Bryopsidales | |
Class | Ulvophyceae | |
Phylum | Chlorophyta | |
Synonym (?) | Chauvinia webbiana (Montagne) (Kützing, 1849) References (not structured): Wendy Guiry in Guiry, MD, Guiry GM (2011) AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; Accesed 23 November 2011 |
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Sub-species level (?) | Not known |
Native origin (?) | Ocean: Atlantic --> Ocean region: E Tropical Atlantic --> Ocean region: SE Atlantic --> Ocean region: SW Atlantic --> Ocean region: W Tropical Atlantic Ocean: Indian --> Ocean region: E Indian Ocean --> Ocean region: W Indian Ocean Ocean: Pacific --> Ocean region: C Tropical Pacific --> Ocean region: E Tropical Pacific --> Ocean region: SE Pacific --> Ocean region: SW Pacific --> Ocean region: W Tropical Pacific References (not structured): Montagne (1838) De l'organization et du mode de reproduction des Caulerptes et en particulier de Caulerpa webbiana. Ann.Sci. Nat. 2. (tome IX) Cardigos F, Tempera F, Ávila S, Gonçalves J, Colaço A and Santos RS (2006) Non-indigenous marine species of the Azores. Helgoland Marine Research 60: 160-169 Amat, Jaen Nieto Frederico Cardigos, Ricardo Serrão Santos (2008) The recent northern introduction of the seaweed Caulerpa webbiana (Caulerpales, Chlorophyta) in Faial, Azores Islands (North-Eastern Atlantic). Aquatic Invasions (2008) Volume 3, Issue 4: 417-422 Comments: C. webbiana is a pan-tropical species. The northern and southernmost limits of occurrence, which regards Madeira and New Zeeland respectively (Amat et al. 2008). Including Canary islands, Tropical Atlantic, Hawaii. NE Atlantic Ocean since 2002; C. webbiana was only recently registered northern to this previous limit (Madeira) in 2002, near Horta’s harbour, Faial (Cardigos et al. 2006). C. webbiana does not seem to be an invasive species elsewhere in the world (Amat et al. 2008). |
Life form / Life stage (?) |
References (not structured): Goldstein M, Morrall SMS, GAMETOGENESIS AND FERTILIZATION IN CAULERPA Annals New york academy of sciences Volume 175, Issue 1, pages 660–672, July 1970 Comments: The genus Caulerpa has a life cycle in which the vegetative phase is diploid and undergoes meiosis and mitosis in the formation of haploid biflagellate gametes. The species may be dioecious or monoecious, producing anisogamous gametes that undergo fusion to form a diploid thick-walled zygote. The fate of the zygote is unknown and the only other means of reproduction is by fragmentation of the vegetative plant (Goldstein & Morrall, 1970) |
Sociability / Life stage (?) |
References (not structured): Amat, Jaen Nieto; Frederico Cardigos and Ricardo Serrão Santos (2008) The recent northern introduction of the seaweed Caulerpa webbiana (Caulerpales, Chlorophyta) in Faial, Azores Islands (North-Eastern Atlantic). Aquatic Invasions (2008) Menez, Ernani G., and Hilconida P. Calumpong. The Genus Caulerpa from Central Visayas, Philippines. Smithsonian Contributions to the Marine Sciences, number 17, 21 pages, 2 figures, 3 plates, 1982 Goldstein M, Morrall SMS, GAMETOGENESIS AND FERTILIZATION IN CAULERPA Annals New york academy of sciences Volume 175, Issue 1, pages 660–672, July 1970 |
Reproductive frequency (?) | Iteroparous References (not structured): Goldstein M, Morrall SMS, GAMETOGENESIS AND FERTILIZATION IN CAULERPA Annals New york academy of sciences Volume 175, Issue 1, pages 660–672, July 1970 Comments: Sexual reproduction in the genus Caulerpa is seasonal, all species use in the study where induced to reproduce at most times of the year with the best sexual reaction occurring on the mornings during the period of full moon (Goldstein & Morrall, 1970). |
Reproductive type (?) | Asexual Sexual References: Goldstein M, Morrall SMS, GAMETOGENESIS AND FERTILIZATION IN CAULERPA Annals New york academy of sciences Volume 175, Issue 1, pages 660–672, July 1970 Comments: The genus Caulerpa has a life cycle in which the vegetative phase is diploid and undergoes meiosis and mitosis in the formation of haploid biflagellate gametes. The species may be dioecious or monoecious, producing anisogamous gametes that undergo fusion to form a diploid thick-walled zygote. The fate of the zygote is unknown and the only other means of reproduction is by fragmentation of the vegetative plant (Goldstein & Morrall, 1970) Goldstein & Morrall, 1970 concludes that in this species their is just a single diploid vegetative phase in the life history. |
Developmental trait (?) | Brooding Direct development References: Goldstein M, Morrall SMS, GAMETOGENESIS AND FERTILIZATION IN CAULERPA Annals New york academy of sciences Volume 175, Issue 1, pages 660–672, July 1970 Comments: "Brooding in this genus"- At sexual maturity the gametes are passively released from the plants through the extrusion papillae or more commonly through ruptures in the cell wall. When the gametes escape from one point in the plant, this triggers subsequent release from several points in a chain reaction. The gametes emerge in a dark green, brownish-green, or orange-green viscous fluid (Goldstein & Morrall, 1970). this is consider brooding since the gametes are not release to the water column; after release from the plants an apparent active clumping reaction is observed (Goldstein & Morrall, 1970). |
Characteristic feeding method / Life stage (?) |
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Mobility / Life stage (?) |
References (not structured): Coppejans E, Leliaert F, Dargent O, De Clekck O (2001) Marine green algae (Chlorophyta) from the north coast of Papua New Guinea. Cryptogamie Algologie 22: 375- 443 Menez, Ernani G., and Hilconida P. Calumpong. The Genus Caulerpa from Central Visayas, Philippines. Smithsonian Contributions to the Marine Sciences, number 17, 21 pages, 2 figures, 3 plates, 1982 Comments: bearing laxly branched rhizoids at the ends. (Menez et al. 1982). The branchelts grouped in series of 5 (6) with larger basal ramuli, gradually decreasing towards the distal part of the series, resulting more or less to a pine-tree silhouet (Coppejans et al. 2001) |
Salinity tolerance range (?) | Not entered |
Habitat modifying ability potential (?) | OLD VALUE References: Amat, Jaen Nieto; Frederico Cardigos and Ricardo Serrão Santos (2008) The recent northern introduction of the seaweed Caulerpa webbiana (Caulerpales, Chlorophyta) in Faial, Azores Islands (North-Eastern Atlantic). Aquatic Invasions (2008) Comments: --/OLD VALUE/-- Perennial habitat former A fixed transect installed in 2005 enabled to quantify the increased density of colonies, which revealed a growth from 0.23 m2 (November 2005) to 5 m2 area (November 2007). C. webbiana was commonly seen “sharing” the same substratum with other introduced species, usually Asparagopsis spp. and Distaplia corolla (Amat et al. 2008). |
Toxicity / Life stage (?) | Unknown |
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: Amat, J. N., Cardigos, F., Santos, R. S. 2008. The recent northern introduction of the seaweed Caulerpa webbiana (Caulerpales, Chlorophyta) in Faial, Azores Islands (north-eastern Atlantic). Aquatic Invasions, 3(4), pp. 417-422. Comments: Introduced species did not seem to have a significant adverse impact on the Azorean marine native flora and fauna. |
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: Amat Jaen Nieto, Frederico Cardigos, Ricardo Serrão Santos (2008) The recent northern introduction of the seaweed Caulerpa webbiana (Caulerpales, Chlorophyta) in Faial, Azores Islands (North-Eastern Atlantic). Aquatic Invasions (2008) Cardigos F, Tempera F, Ávila S, Gonçalves J, Colaço A, Santos RS (2006) Non-indigenous marine species of the Azores. Helgoland Marine Research 60: 160-169. Volume 3, Issue 4: 417-422 Santos RS, Hawkins S, Monteiro LR, Alves M, Isidro EJ (1995) Marine research, resources and conservation in the Azores. Aquatic Conservation: Marine and Freshwater Ecosystems 5 (4): 311-354 Comments: The author Cardigos et al. (2006) suggest boat hulls or rafting as probable vectors for the introduction of C. webbiana. But Amat et al. 2008 affirms that C. webbiana most probably did not arrived to the archipelago by rafting vectors (or natural dispersal) since the species is only localized inside and in some parts outside Faial Harbaour, being the most probable theory the biofouling vector. Although the Anthropogenic activities are the main cause of introduction, the climate change can be responsible to the establishment of this species in this Region (Amat et al.2008). If C. webbiana had arrived by rafting, it would not be an introduced case but a natural dispersal one. C. webbiana would then certainly have been found elsewhere around Faial coast and on other Azorean islands; as it happened with other organisms that arrived through the complex system of currents – accompanied by episodic anomalies – that surrounds this archipelago located in the middle of the Atlantic Ocean (Santos et al. 1995). |
Last update by | Sandra Gečaitė, 2024-08-05 |