AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Streblospio benedicti [WoRMS] | |
Authority | Webster, 1879 | |
Family | Spionidae | |
Order | Spionida | |
Class | Polychaeta | |
Phylum | Annelida | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Ocean: Atlantic --> Ocean region: W Tropical Atlantic |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
Comments: They play an important part in estuarine food webs, despite their small size, because they can reach very high population densities. |
Reproductive frequency (?) | Iteroparous References (not structured): Levin, L. A., Caswell, H., DePatra, K. D., Creed, E. L. 1987. Demographic consequences of larval development mode: planktotrophy vs. lecithotrophy in Streblospio benedicti. Ecology, 68(6), pp. 1877-1886. |
Reproductive type (?) | Sexual References: Levin, L. A. 1984. Multiple patterns of development in Streblospio benedicti Webster (Spionidae) from three coasts of North America. The Biological Bulletin, 166(3), pp. 494-508. Levin, L. A., Creed, E. L. 1986. Effect of temperature and food availability on reproductive responses of Streblospio benedicti (Polychaeta: Spionidae) with planktotrophic or lecithotrophic development. Marine Biology, 92, pp. 103-113. Comments: S. benedicti reproduces sexually and has two separate sexes. They typically experience high rates of reproduction and high growth rates. Females have pouches, called dorsal brood pouches, which are used to incubate the embryos during the early stages of development. Sexual maturity is reached at around 9 to 14 weeks and populations and individuals may vary during development. |
Developmental trait (?) | Brooding Lecithotrophy Planktotrophy References: Levin, L. A. 1984. Multiple patterns of development in Streblospio benedicti Webster (Spionidae) from three coasts of North America. The Biological Bulletin, 166(3), pp. 494-508. Comments: The species is poecilogonous, which means that the females exhibit two distinct reproductive strategies during early larval development. These strategies are genetically determined and differ in their brood development. Both forms of development can also occur within the same population. In planktotrophic brood development, some females will produce large amounts of small eggs, which are around 60-70 μm in diameter. These developed larvae typically have long swimming setae and will live in and feed on plankton for a period of up to seven weeks. Lecithotrophic brood development occurs when the females produce fewer amounts of large eggs, which are around 100-200 μm in diameter. In contrast to the planktotrophic offspring, the lecithotrophic larvae lack the swimming setae. |
Characteristic feeding method / Life stage (?) |
References (not structured): Mahon, H. K., Dauer, D. M. 2005. Organic coatings and ontogenetic particle selection in Streblospio benedicti Webster (Spionidae: Polychaeta). Journal of experimental marine biology and ecology, 323(1), pp. 84-92. Comments: Worms of the genus Streblospio use their long, ciliated palps to remove detritus and algae from the sediment surface and transport it to their mouths. They are also capable of using their long, ciliated palps to remove particles either from the sediment surface or the water column, and so can function both as a suspension and a deposit feeder. |
Mobility / Life stage (?) |
References (not structured): Llansó, R. J. 1991. Tolerance of low dissolved oxygen and hydrogen sulfide by the polychaete Streblospio benedicti (Webster). Journal of Experimental Marine Biology and Ecology, 153(2),pp. 165-178. Mahon, H. K., Dauer, D. M. 2005. Organic coatings and ontogenetic particle selection in Streblospio benedicti Webster (Spionidae: Polychaeta). Journal of experimental marine biology and ecology, 323(1), pp. 84-92. Comments: S. benedicti is a tube-dwelling common in estuarine habitats. They are typically found in muddy or soft-sediment areas, such as mudflats, seagrass beds, and marshes. During the larval stage, Streblospio benedicti is planktonic, meaning it is free-swimming and can be carried by water currents over larger distances. This is the most mobile stage of its life cycle, allowing for dispersal before settling down into the sediment as an adult. |
Salinity tolerance range (?) | Exact range: 4 - 45 References: Kocheshkova, O. V., Matviy, S. G. 2009. Distribution of Streblospio benedicti (Webster, 1879) and Manayunkia aestuarina (Bourne, 1883)(Annelida: Polychaeta) in the Vistula Lagoon of the Baltic Sea. Inland Water Biology, 2, pp. 327-335. Comments: This polychaete also tolerates a wide range of salinity and has been found in salinities as low as 4 PSU in the Baltic Sea and as high as ~45 PSU in the Salton Sea, California. |
Habitat modifying ability potential (?) | Allogenic ecosystem engineers References: Heiman, K. W., Micheli, F. 2010. Non-native ecosystem engineer alters estuarine communities. Integrative and Comparative Biology, 50(2), pp. 226-236. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Anthropogenic chemical compounds References: Chandler, G. T., Shipp, M. R., Donelan, T. L. 1997. Bioaccumulation, growth and larval settlement effects of sediment-associated polynuclear aromatic hydrocarbons on the estuarine polychaete, Streblospio benedicti (Webster). Journal of Experimental Marine Biology and Ecology, 213(1), pp. 95-110. |
Known human health impact? | Not known Comments: Not available. |
Known economic impact? | Not known Comments: Not available. |
Known measurable environmental impact? | Known References: Heiman, K. W., Micheli, F. 2010. Non-native ecosystem engineer alters estuarine communities. Integrative and Comparative Biology, 50(2), pp. 226-236. Comments: The spionid polychaete Streblospio benedicti can attain very high abundances, especially in the shallow, fine sediments of estuaries. It is probably a significant grazer of phytoplankton in native and invaded estuaries, and may have effects on sediment properties. Competition with other suspension and deposit feeding invertebrates (polychaetes, amphipods, mollusks) is likely. |
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 Comments: Settled worms build vertical mucoid tubes in soft sediment, and can be found in oyster beds, or in fouling communities, where sediment can accumulate among shells or in crevices. |
Last update by | Sandra Gečaitė, 2024-08-21 |