Abstract
Rocky subtidal communities on the Swedish west coast were monitored over approximately 16 years (1970–1985) by means of stereophotographic recordings, at intervals, of fixed sites.
Dominating elements of community structure were studied at the 5- and 10 m depth levels of an outer archipelago locality. Excluding seasonal variations, the basic community structure, largely dominated by the perennial phaeophycean Halidrys siliquosa (L.), remained relatively stable over the first 7–8 years of study, but with an increasing trend in cover of filamentous epiphytic red algae. Later, the structure of the studied communities changed radically. The changes initially involved intense settling of the blue mussel Mytilus edulis L. and reduced cover of red algae. The mussels settled largely on Halidrys plants which eventually broke down almost completely. Later, there was intensive predation on Mytilus by the starfish Asterias rubens Linné. After the elimination of Mytilus, the studied test areas were dominated by filamentous ephemeral red algae for the rest of the study period, but with some regeneration of Halidrys at the 5 m level.
The observed changes were thought to be indicative of a major disturbance in the coastal ecosystems off the Swedish west coast during the studied period. This notion is discussed in relation to studies of other components of the ecosystem during the same time period and in relation to possible causes. Among the latter may be mentioned a suspected eutrophication process, long-term temperature anomalies and resulting effects on biological interrelationships such as competition, predation and chemical defense.
The observed trends included a shift in dominance from slow-growing perennial algae to fast-growing ephemeral algae. If this shift was a general phenomenon, for which there is some circumstantial evidence, it could have important repercussions on the cycling of nutrients and organic matter in the coastal ecosystem. Possible effects are discussed on hypothetical terms in relation to observed anomalies in phytoplankton blooms and benthic oxygenation.
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References
Almer, B., 1979. Av yrkes- och binäringsfiskare observerade förändringar vid Hallandskusten under 1970-talet. Report from the Fishery Board in county Halland (mimeo), 6 pp.
Almer, B., 1982. Förändringar i kustnära havsområden åren 1980–1981. Report from the Fishery Board in county Halland (mimeo), 8 pp.
Berggren, H., 1982. Föroreningsbelastning på Västerhavet. S 12 (mimeo).
Beukema, J. J., G. C. Cadée & H. Hummel, 1983. Differential variability in time and space of numbers in suspension and deposit feeding benthic species in a tidal flat area. Oceanol. Acta No. Sp.: 21–26 (Proc. 17th Eur. Mar. Biol. Symp.).
Bowman, R. S. & J. R. Lewis, 1977. Annual fluctuations in the recruitment of Patella vulgata L. J. Mar. Biol. Ass. U.K. 57: 793–815.
Buchanan, J. B., M. Sheader & P. F. Kingston, 1978. Sources of variability in the benthic macrofauna off the south Northumberland coast, 1971–1976. J. Mar. Biol. Ass. U.K. 58: 191–209.
Chapman, A. R. O. & J. S. Craigie, 1977. Seasonal growth in Laminaria longicruris: Relations with dissolved inorganic nutrients and internal reserves of nitrogen. Mar. Biol. 40: 197–205.
Colebrook, J. M., 1982. Continous plankton records: phytoplankton, zooplankton and environment, North East Atlantic and North Sea, 1958–1980. Oceanol. Acta 5: 473–480.
Connell, J. H., 1972. Community interactions on marine rocky intertidal shores. Ann. Rev. Ecol. Syst. 3: 169–192.
Connell, J. H., 1974. Ch. 2. Ecology: field experiments in marine ecology. In: R. Mariscal (ed.), Experimental Marine Biology. Academic Press, New York: 21–54.
Cushing, D. H., 1975. Marine ecology and fisheries. Cambridge Univ. Press, Cambridge, 278 pp.
Dayton, P. K., 1971. Competition, disturbance and community organization: the provision and subsequent utilization of space in a rocky intertidal community. Ecol. Monogr. 41: 351–389.
Edler, L., 1984. The West coast. In: R. Rosenberg (ed.), Eutrophication in marine waters surrounding Sweden — a review. Swedish National Environment Protection Board, Report 1808: 74–111.
Edler, L., G. Aertebjerg & E. Graneli, 1982. Exceptional plankton blooms in the entrance to the Baltic Sea — The Kattegatt and Belt Sea area. ICES, C.M. 1982/L:20: 6 pp.
Glombitza, K. W. & E. Sattler, 1973. Antibiotica aus Algen. 10. Trifuhalol, ein neuer Triphenyläther aus Halidrys siliquosa. Tetrahedron Lett. 43: 4277–4280.
Glombitza, K. W., C. Geisler & G. Eckhardt, 1980. Polyhydroxyphenyl ethers from Phaeophycea Halidrys siliquosa (III). Bot. mar. XXIII: 735–740.
Green, N., 1980. Underwater stereophotography applied in ecological monitoring. Niva Report No. OF-80613: 99 pp.
Hartnoll, R. G. & S. J. Hawkins, 1980. Monitoring rocky-shore communities: a critical look at spatial and temporal variation. Helgoländer wiss. Meeresunters. 33: 484–494.
Hawkins, S. J. & R. G. Hartnoll, 1983. Changes in a rocky shore community: an evaluation of monitoring. Mar. Envir. Res. 9: 131–181.
Hornsey, I. S. & D. Hide, 1974. The production of antimicrobial compounds by British marine algae. Br. Phycol. J. 9: 353–361.
Hällfors, G., P. Kangas & Å. Niemi, 1984. Recent changes in the phytal at the south coast of Finland. Ophelia 3: 51–59.
Josefson, A. B., 1981. Effekter av syrebrist och långsiktiga förändringar av bottensediment på den makrobentiska infaunan i Gullmarsfjordens djupbassäng: En preliminär rapport. Rep. to the Nat. Swedish Envir. Prot. Bd. (mimeo): 27 pp.
Josefson, A. B., 1985. Spatial and temporal structure of marine infauna in the Skagerrak (Eastern North Sea). Ph.D. thesis, University of Gothenburg: 70 pp.
Kangas, P., H. Autio, G. Hällfors, H. Luther, A. Niemi & H. Salemaa, 1982. A general model of the decline of Fucus vesiculosus at Tvärminne, south coast of Finland in 1977–81. Acta Bot. Fennica 118: 1–27.
Larsson, U., 1984. The Baltic. In: R. Rosenberg (ed.), Eutrophication in marine waters surrounding Sweden. Swedish National Environment Protection Board, Report 1808: 17–73.
Lewis, J. R., 1964. The ecology of rocky shores. English University Press, London: 323 pp.
Lewis, J. R., 1976. Long-term ecological surveillance: practical realities in the rocky littoral. Oceanogr. Mar. Biol. Ann. Rev. 14: 371–390.
Lewis, J. R., 1980. Options and problems in environmental management and evaluation. Helgoländer wiss. Meeresunters. 33: 452–466.
Lewis, J. R., 1984. Temporal and spatial changes in benthic communities: COST 47 approach. Mar. Poll. Bull. 15: 397–402.
Lindahl, O. & L. Hernroth, 1983. Phytozooplanktoncommunity in coastal waters of western Sweden — an ecosystem off balance? Mar. Ecol. Prog. Ser. 10: 119–126.
Lundälv, T., 1971. Quantitative studies on rocky-bottom biocoenoses by underwater photogrammetry. A methodological study. Thalassia Jugosl. 7: 201–208.
Lundälv, T., 1974. Underwater photogrammetry — a new device for biodynamical studies in the marine environment. In: B. Afzelius (ed.), Yearbook of the Swedish Nat. Sci. Res. Council 1974. Allmänna Förlaget, Stockholm: 222–229.
Lundälv, T., 1982. Effekter av planktonblomningar vid Bohuskusten. In: Anon (ed.), Algblomning. Libeŕ Allmänna Förlaget, Stockholm: 11–19.
Lundälv, T., 1985. Detection of long-term trends in rocky sublittoral communities: Representativeness of fixed sites. In: P. G. Moore & R. Seed (eds), The ecology of rocky coasts. Hodder and Stoughton Educational, U.K.: 329–345.
Lundälv, T. & H. Christie, 1986. Comparative trends and ecological patterns of rocky subtidal communities in the Swedish and Norwegian Skagerrak area. Hydrobiologia 142: 71–80.
Michanek, G., 1971. A review of world seaweed resources. Proc. 7th int. Seaweed Symp., Sapporo, Japan. Univ. Tokyo Press: 248–250.
Moss, B. L., 1982. The control of epiphytes by Halidrys siliquosa (L.) Lyngb. (Phaeophyta, Cystoceiraceae). Phycologia 21: 185–191.
Paine, R. T., 1966. Food web complexity and species diversity. Am. Nat. 100: 65–75.
Paine, R. T., 1969. The Pisaster — Tegula interaction: prey patches, predator food preferences, and intertidal community structure. Ecology 50: 950–962.
Rosenberg, R., 1985. Eutrophication — the future marine coastal nuisance? Mar. Poll. Bull. 16: 227–231.
Rosenberg, R. & L. Edler, 1981. Laholmsbukten — oviss framtid för störd miljö. Forskning och Framsteg 3: 36–39.
Rueness, J., 1973. Pollution effects on littoral algal communities in the inner Oslofjord, with special reference to Ascophyllum nodosum. Helgoländer wiss. Meeresunters. 24: 446–454.
Sattier, E. K., W. Glombitza, F. W. Wehrli & G. Eckhardt, 1977. Antibiotica aus algen. 16. Polyhydroxyphenyläther aus der Phaeophycee Halidrys siliquosa. Tetrahedon 33: 1239–1244.
Sutherland, J. P., 1974. Mutliple stable points in natural communities. Am. Nat. 108: 859–873.
Svansson, A., 1984. Hydrography of the Gullmar Fjord. Inst. of Hydrogr. Res. Göteborg 23, 90 pp.
Thorell, L., 1981. Föroreningstillförsel från landområden. Föroreningssituationen i Skagerrak-Kattegatt. Nordiska Ministerrådets Sekretariat i Oslo. Gotab, Stockholm: 87–93.
Torlegård, A. K. I. & T. Lundälv, 1974. Under-water analytical system. Photogramm. Engng. 40: 287–293.
Wallentinus, I., 1983. Vegetationsklädda bottnar i Östersjön. Rep. to ‘Eutrofiering i Marin Miljö’, Nat. Swedish Envir. Prot. Bd., 56 pp.
Wallentinus, I., 1984a. Partitioning of nutrient uptake between annual and perennial seaweeds in a Baltic archipelago area. Hydrobiologia 116: 363–370.
Wallentinus, I., 1984b. Comparisons of nutrient uptake rates for Baltic macroalgae with different thallus morphologies. Mar. Biol. 80: 215–225.
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Lundälv, T., Larsson, C.S. & Axelsson, L. Long-term trends in algal-dominated rocky subtidal communities on the Swedish west coast — a transitional system?. Hydrobiologia 142, 81–95 (1986). https://doi.org/10.1007/BF00026749
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DOI: https://doi.org/10.1007/BF00026749