Marine Biology

, Volume 122, Issue 1, pp 13–21 | Cite as

Floating clumps of seaweed around Iceland: natural microcosms and a means of dispersal for shore fauna

  • A. Ingólfsson


Macrofauna in 41 clumps of floating seaweeds taken up to 117 km from the shore of Iceland between 1990 and 1992 was examined. Thirty-nine taxa were found. Many of the species inhabit seaweed on the shore or live in cast-up algae, but some benthic/epibenthic and planktonic/neustonic species were also common. The macrofauna communities of floating clumps were shaped both by colonization from the surroundings and the disappearance of individuals carried from the shore and included species rarely found elsewhere. A positive correlation between density of individuals and size of clumps was found for many species, while there was a negative correlation between density of individuals and distance from shore in some species. Species richness was positively related to clump size. Number of species per clump declined with distance from shore, while the expected number of species per ten individuals did not. Results indicate that rafting on floating seaweed is a mechanism whereby many intertidal animal species can be dispersed over long distances, possibly hundreds of kilometers or more.


Negative Correlation Species Richness Animal Species Macrofauna Community Clump Size 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Davenport J, Rees EIS (1993) Observations on neuston and floating weed patches in the Irish Sea. Estuar cstl Shelf Sci 36:395–411Google Scholar
  2. Edgar GJ (1987) Dispersal of faunal and floral propagules associated with drifting Macrocystis pyrifera plants. Mar Biol 95:599–610Google Scholar
  3. Edinburg, Oceanographic Laboratory (1973) Continuous plankton records: a plankton atlas of the North Atlantic and the North Sea. Bull mar Ecol 7:1–174Google Scholar
  4. Einarsson H, Stefánsson U (1953) Drift bottle experiments in the waters between Iceland, Greenland and Jan Mayen during the years 1947 and 1949. Rit Fiskideildar 1:1–20Google Scholar
  5. Fine ML (1970) Faunal variation on pelagic Sargassum. Mar Biol 7:112–122Google Scholar
  6. Highsmith RC (1985) Floating and algal rafting as potential dispersal mechanisms in brooding invertebrates. Mar Ecol Prog Ser 25:169–179Google Scholar
  7. Ingólfsson A (1975) Life on seashores. In: Gardarsson A (ed) Rit Landverndar, Vol. 4. Votlendi. Landvernd, Reykjavík, pp 61–99 (in Icelandic with English summary)Google Scholar
  8. Ingólfsson A (1977) Distribution and habitat preferences of some intertidal amphipods in Iceland. Acta nat Isl 25:1–28Google Scholar
  9. Ingólfsson A (1979) Distribution and habitat preferences of Jaera spp. (Isopoda: Asellota) in Iceland. Náttúrufrædingurinn 49: 97–104 (in Icelandic with English summary)Google Scholar
  10. Ingólfsson A (1990) Nókkur ord um panglýs (Idotea spp.). í íslenskum og erlendum fjörum. In: Eggertsson G, Gudmundsson GF, Thorlaksdottir R, Sigmundsson S (eds) Brunnur Lifandi Vatns. Háskóli Íslands — Háskólaútgáfa, Reykjavík, pp 9–12Google Scholar
  11. Ingólfsson A (1992) The origin of the rocky shore fauna of Iceland and the Canadian Maritimes. J Biogeogr 19:705–712Google Scholar
  12. Hurlbert SH (1971) The nonconcept of species diversity: a critique and alternative parameters. Ecology 52:577–586Google Scholar
  13. Kingsford MJ (1992) Drift algae and small fish in coastal waters of northeastern New Zealand. Mar Ecol Prog Ser 80:41–55Google Scholar
  14. Kingsford MJ, Choat JH (1985) The fauna associated with drift algae captured with a plankton-mesh purse seine net. Limnol Oceanogr 30:618–630Google Scholar
  15. Knight-Jones Ph, Knight-Jones EW (1977) Taxonomy and ecology of British Spirorbidae (Polychaeta). J mar biol Ass UK 57:453–499Google Scholar
  16. Lewis JR (1964) The ecology of rocky shores. The English Universities Press Ltd., LondonGoogle Scholar
  17. Locke A, Corey S (1989) Amphipods, isopods and surface currents: a case for passive dispersal in the Bay of Fundy, Canada. J Plankton Res 11:419–430Google Scholar
  18. Lønne OJ, Gulliksen B (1991) Sympagic macro-fauna from multiyear sea-ice near Svalbard. Polar Biol 11:471–477Google Scholar
  19. Mitchell CT, Hunter JR (1970) Fishes associated with drifting kelp, Macrocystis pyrifera, off the coast of southern California and northern Baja California. Calif Fish Game 56:288–297Google Scholar
  20. Naylor E (1957) The occurrence of Idotea metallica Bosc in British waters. J mar biol Ass UK 36:599–602Google Scholar
  21. Nielsen P, Ringdahl O, Tuxen SL (1954) Diptera 1 (exclusive of Ceratopogonidae and Chironomidae). In: Frióriksson Á, Tuxen SL (eds) The zoology of Iceland, Vol III, Part 48a. Ejnar Munksgaard, Copenhagen, pp 1–189Google Scholar
  22. Pederson JB, Capuzzo JM (1984) Energy budget of an omnivorous rocky shore amphipod, Calliopius laeviusculus (Krøyer). J exp mar Biol Ecol 76:277–291Google Scholar
  23. Safran P, Omori M (1990) Some ecological observations on fishes associated with drifting seaweed off Tohoku coast, Japan. Mar Biol 105:395–402Google Scholar
  24. Steele DH, Steele VJ (1972) The biology of Gammarellus angulosus (Crustacea, Amphipoda) in the Northwestern Atlantic. J Fish Res Bd Can 29:1337–1340Google Scholar
  25. Steele DH, Steele VJ (1973) Some aspects of the biology of Calliopius laeviusculus (Krøyer) (Crustacea, Amphipoda) in the northwestern Atlantic. Can J Zool 51:723–728Google Scholar
  26. Stefánsson U (1961) Hafid. Almenna Bókafélagid, ReykjavíkGoogle Scholar
  27. Stoner AW, Greening HS (1984) Geographic variation in the macrofaunal associates of pelagic Sargassum and some biogeographic implications. Mar Ecol Prog Ser 20:185–192Google Scholar
  28. Tully O, Ó Céidigh P (1986) The ecology of Idotea species (Isopoda) and Gammarus locusta (Amphipoda) on surface drifweed in Galway Bay (west of Ireland). J mar biol Ass UK 66:931–942Google Scholar
  29. Tully O, Ó Céidigh P (1989) The ichthyoneuston of Galway Bay (west of Ireland). II. Food of post-larval and juvenile neustonic and pseudoneustonic fish. Mar Ecol Prog Ser 51:301–310Google Scholar
  30. Yeatman HC (1962) The problem of dispersal of marine littoral copepods in the Atlantic Ocean, including some redescriptions of species. Crustaceana 4:253–272Google Scholar
  31. Wells JBJ (1970) Copepoda — I. Sub-order Harpacticoida. Zooplankton, Sheet 133. Conseil International por L'exploration de la Mer, CharlottenlundGoogle Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • A. Ingólfsson
    • 1
  1. 1.Institute of BiologyUniversity of IcelandReykjavíkIceland

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