, Volume 108, Issue 3, pp 201–217

Ecology of benthic and epiphytic nematodes in brackish waters

  • P. Jensen


Abundances of benthic nematodes from shallow waters in Tvärminne, Finland and in Ringkøbing Fjord, Denmark averaged 1.2–1.5 106 individuals m−2. Less than 20 species were found. More than 80% of the individuals were made up by Anoplostoma viviparum, Chromadorita fennica, Axonolaimus spinosus, Daptonema trabeculosum and Sabatieria pulchra. S. pulchra is designated as an anoxybiotic species and is attracted to the root tips of young Potamogeton perfoliatus, whilst A. viviparum and C. fennica are oxybiotic species.

Abundance of epiphytic nematodes extracted from submerged macrophytes in the Cladophora-Pilayella belt in the outer archipelago of the Finnish archipelago (July 1978) was estimated to reach 5 · 106 individuals m−2, equivalent to a biomass of 1.2 g org. C m−2. Abundance and biomass are smaller in the Potamogeton meadows in the inner archipelago, in littoral algal vegetation of the sea zone, and on sublittoral vegetation. Epiphytic nematode species composition is influenced by salinity and food availability and not by physiognomic types or silt contents of the vegetation in the Baltic Sea, European estuaries and lakes. Dominant species are: Chromadorina bioculata, Punctodora ratzeburgensis, Chromadorita tenuis, Adoncholaimus thalassophygas, Theristus acer, Monhystera parva, M. aff. filiformis and Chromadora aff. nudicapitata.

A theory is proposed to explain observed seasonal changes in the species composition of epiphytic and benthic nematodes. During winter months, the submerged vegetation is mostly destroyed, being found as detritus on the sea bottom. Sampling benthic nematodes during winter thus includes epiphytic species living in the detritus. In spring the epiphytic nematodes detect the newly growing vegetation, leave the sea bottom, colonize the submerged vegetation and spend their life there.


Nematoda benthal phytal detritus adaptations estuaries 


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  1. Arlt, G., 1973. Vertical and horizontal microdistribution of the meiofauna in the Greifswalder Bodden. Oikos Suppl. 15: 105–111.Google Scholar
  2. Bell, S. S., Watzin, M. C. & Coull, B. C., 1978. Biogenic structure and its effect on the spatial heterogeneity of meiofauna in a salt marsh. J. exp. mar. Biol. Ecol. 35: 99–107.CrossRefGoogle Scholar
  3. Berg, K., 1938. Studies on the bottom animals of Esrom Lake. Mem. Acad. r. Scie. Lett. Dan., Copenhague. Sect. Sci. 9, Sér. 8, 318 pp.Google Scholar
  4. Bouwman, L. A., 1981. A survey of nematodes from the Ems estuary. 1. Systematics. Zool. Jb. Syst. Okol. Geogr. Tiere 108: 335–385.Google Scholar
  5. Elmgren, R., 1976. Baltic benthos communities and the role of meiofauna. Contrib. Askö Lab. Stockholm 14: 1–31.Google Scholar
  6. Elmgren, R. & Ganning, B., 1976. Ecological studies of two shallow brackish water ecosystems. Contrib. Askö Lab. Stockholm 6: 1–56.Google Scholar
  7. Fenchel, T., 1970. Studies on the decomposition of organic detritus derived from turtle grass Thalassia testudinum. Limnol. Oceanogr. 15: 14–20.Google Scholar
  8. Fenchel, T., 1975. The quantitative importance of the benthic microfauna of an arctic tundra pond. Hydrobiologia 46: 445–464.CrossRefGoogle Scholar
  9. Fenchel, T., 1978. The ecology of micro-and meiobenthos. Ann. Rev. Ecol. Syst. 9: 99–121.CrossRefGoogle Scholar
  10. Findlay, S. & Tenore, K. R., 1982. Effect of a free-living marine nematode (Diplolaimella chitwoodi) on detrital carbon mineralization. Mar. Ecol. Prog. Ser. 8: 161–166.Google Scholar
  11. Gerlach, S. A., 1953. Die biozönotische Gliederung der Nematodenfauna an den deutschen Küsten. Z. Morph. Okol. Tiere 41: 411–512.CrossRefGoogle Scholar
  12. Gerlach, S. A., 1971. On the importance of marine meiofauna for benthos communities. Oecologia 6: 176–190.CrossRefGoogle Scholar
  13. Gerlach, S. A., 1977. Means of meiofauna dispersal. Mikrofauna Meeresboden 61: 89–103.Google Scholar
  14. Gerlach, S. A. & Schrage, M., 1971. Life cycles in marine meiobenthos. Experiments at various temperatures with Monhystera disjuncta and Theristus pertenuis (Nematoda). Mar. Biol. 9: 272–280.CrossRefGoogle Scholar
  15. Gerlach, S. A. & Riemann, F., 1973–74. The Bremerhaven checklist of aquatic nematodes. A catalogue of Nematoda Adenophorea excluding the Dorylaimida. 1 & 2. Veröff. Inst. Meeresforsch. Bremerh. Suppl. 4, 734 pp.Google Scholar
  16. Glowacka, I., Soszka, G. J. & Soszka, H., 1976. Invertebrates associated with macrophytes. In: Pieczyńska, E. (ed.), Selected Problems of Lake Littoral Ecology. Warsaw Univ.: 97–122.Google Scholar
  17. Hakala, I., 1971. A new model of the Kajak bottom sampler, and other improvements in the zoobenthos sampling technique. Ann. zool. fenn. 8: 422–426.Google Scholar
  18. Heip, C., 1973. Een populatie-dynamische studie over de bentale Ostracoda en Copepoda van een brakwater habitat. Ph.D. Thesis, St. Univ. Ghent, Belg., 429 pp.Google Scholar
  19. Heip, C., Vincx, M., Smol, N. & Vranken, G., 1982. The systematics and ecology of free-living marine nematodes. Helminth. Abstr., Ser. B, Pl. Nematol. 51: 1–31.Google Scholar
  20. Hicks, G. R. F., 1977. Species composition and zoogeography of marine phytal harpacticoid copepods from Cook Strait, and their contribution to total phytal meiofauna. N. Z. J. mar. Freshwat. Res. 11: 441–469.Google Scholar
  21. Hopper, B. C. & Meyers, S. P., 1967. Foliicolous marine nematodes on turtle grass, Thalassia testudinum König, in Biscayne Bay, Florida. Bull. mar. Sci. 17: 471–517.Google Scholar
  22. Hällfors, G., 1976. The plant cover of some littoral biotopes at Krunnit (NE Bothnian Bay). Acta Univ. Oul. A.. 42: 87–95.Google Scholar
  23. Hällfors, G., Leskinen, E. & Niemi, Å, in press. Hydrography, nutrients and chlorophyll a at Tvärminne Storfjärd, Gulf of Finland in 1979/80. Sci. Rep. W. & A. Nottbeck fdn. 4.Google Scholar
  24. Iizumi, H., Hattori, A. & McRoy, C. P., 1980. Nitrate and nitrite in interstitial waters of eelgras beds in relation to the rhizosphere. J. exp. mar. Biol. Ecol. 47: 191–201.CrossRefGoogle Scholar
  25. Jansson, A. M., 1966. Diatom and microfauna-producers and consumers in the Cladophora belt. Veröff. Inst. Meeresforsch. Bremerh. Sonderbd. 11: 281–288.Google Scholar
  26. Jansson, A. M., 1970. Production studies in the Cladophora belt. Thalassia Jugosl. 6: 143–155.Google Scholar
  27. Jansson, A. M., Kautsky, N., von Oertzen, J. A., Schramm, W., Sjöstedt, B., von Wachenfeldt, T. & Wallentinus, I., 1982. Structure and functional relationships in a southern Baltic Fucus ecosystem. Baltic mar. Biol. Publ. 8: 1–95.Google Scholar
  28. Jensen, P., 1977. Nematodes of the Øresund, Denmark. Spatial distribution patterns and determination of sample size. Proc. 3rd int. Meiofauna Conf. Hamburg, Aug. 1977.Google Scholar
  29. Jensen, P., 1979a. Nematodes from the brackish waters of the southern archipelago of Finland. Phytal species. Ann. zool. fenn. 16: 281–285.Google Scholar
  30. Jensen, P., 1979b. Nematodes from the brackish waters of the southern archipelago of Finland. Benthic species. Ann. zool. fenn. 16: 151–168.Google Scholar
  31. Jensen, P., 1979c. The absence of a permanent nematode fauna in Baltic rock pool ecosystems. Est. coast. mar. Sci. 9: 797–800.Google Scholar
  32. Jensen, P., 1979d. Description of the aquatic nematode Adorus astridae sp. n. with notes on the systematic position and geographical distribution of Adorus species. Ann. zool. fenn. 16: 84–88.Google Scholar
  33. Jensen, P., 1979e. Coexistence of epigrowth feeding aquatic species of the genus Chromadorita (Nematoda) from the southern archipelago of Finland. Zool. Scr. 8: 315.CrossRefGoogle Scholar
  34. Jensen, P., 1980. Description of the marine free-living nematode Chromadora lorenzeni n. sp., with notes on its microhabitats. Zool. Anz. 205: 213–218.Google Scholar
  35. Jensen, P., 1981a. Species, distribution and a microhabitat theory for marine mud dwelling Comesomatidae (Nematoda) in European waters. Cah. Biol. mar. 22: 231–244.Google Scholar
  36. Jensen, P., 1981b. Phyto-chemical sensitivity and swimming behaviour of the free-living marine nematode Chromadorita tenuis. Mar. Ecol. Prog. Ser. 4: 203–206.Google Scholar
  37. Jensen, P., 1982a. Diatom feeding behaviour of the free-living marine nematode Chromadorita tenuis. Nematologica 28: 71–76.CrossRefGoogle Scholar
  38. Jensen, P., 1982b. A new meiofauna sample splitter. Ann. zool. fenn. 19: 233–236.Google Scholar
  39. Jensen, P., 1982c. Reproductive behaviour of the free-living marine nematode Chromadorita tenuis. Mar. Ecol. Prog. Ser. 10: 89–95.Google Scholar
  40. Jensen, P., 1983. Meiofaunal abundance and vertical zonation in a sublittoral soft bottom, with a test of the ‘Haps’ corer. Mar. Biol. 74: 319–326.CrossRefGoogle Scholar
  41. Jensen, P., in press, a. Life history of the free-living marine nematoda Chromadorita tenuis. Nematologica.Google Scholar
  42. Jensen, P., in press, b. Measuring carbon content in nematodes. Helgoländer Meeresunters.Google Scholar
  43. Jensen, P. & Lorenzen, S., in press. Nematoda. In: Zetterberg, G. (ed.), Code list Ö 1 Baltic invertebrates according to the Rubin system. Version 81195-Syst, Suppl. Natn. Swed. Envi. Prot. Bd, Stockholm.Google Scholar
  44. Jørgensen, B. B., 1977. Bacterial sulfate reduction with in reduced microniches of oxidized marine sediments. Mar. Biol. 41: 7–17.CrossRefGoogle Scholar
  45. Kangas, P., 1978. On the quantity of meiofauna among the epiphytes of Fucus vesiculosus in the Askö area, northern Baltic Sea. Contrib. Askö Lab. Stockholm 24: 1–24.Google Scholar
  46. Kautsky, N., 1974. Quantitative investigations of the red algal belt in the Askö area, northern Baltic proper. Contrib. Askö Lab. Stockholm 3: 1–24.Google Scholar
  47. Kautsky, H., Widbom, B. & Wulff, F., 1981. Vegetation macrofauna and benthic meiofauna in the phytal zone of the archipelago of Luleå-Bothnian Bay. Ophelia 20: 53–77.Google Scholar
  48. Keynäs, K. & Keynäs, L., 1978. Meiofauna in soft sediments at Tvärminne, northern Baltic. Methods and preliminary results. Mem. Soc. Fauna Flora fenn. 54: 65–68.Google Scholar
  49. Kito, K., 1982. Phytal marine nematode assemblage on Sargassum confusum, with reference to the structure and seasonal fluctuations. J. Fac. Sci. Hokkaido Univ. Ser. 6, Zool. 23: 143–161.Google Scholar
  50. Lappalainen, A. & Kangas, P., 1975. Species diversity of macrofauna in a Zostera marina community in Tvärminne, S. Finland. Meerentuutkimuslait. Julk. 239: 316–324.Google Scholar
  51. Lewis, J. B. & Hollingworth, C. E., 1982. Leaf epifauna of the seagrass Thalassia testudinum. Mar. Biol. 71: 41–49.CrossRefGoogle Scholar
  52. Lopez, G., Riemann, F. & Schrage, M., 1979. Feeding biology of the brackish-water oncholaimid nematode Adoncholaimus thalassophygas. Mar. Biol. 54: 311–318.CrossRefGoogle Scholar
  53. Luther, H., 1951. Verbreitung und Ökologie der höheren Wasserpflanzen im Brackwasser der Ekenäs-gegend in Südfinland. 1. Allgemeiner Teil. Soc. Fauna Flora fenn. 49: 1–232.Google Scholar
  54. Luther, H., Hällfors, G., Lappalainen, A. & Kangas, P., 1975. Littoral benthos of the northern Baltic Sea. 1. Introduction. Int. Revue ges. Hydrobiol. 60: 289–296.Google Scholar
  55. Meschkat, A., 1934. Der Bewuchs in der Röhrichten des Plattensees. Arch. Hydrobiol. 27: 436–517.Google Scholar
  56. Meyers, S. P. & Hopper, B. E., 1967. Studies on marine fungal-nematode associations and plant degradation. Helgoländer wiss. Meeresunters. 15: 270–281.CrossRefGoogle Scholar
  57. Meyers, S. P. & Hopper, B. E., 1973. Nematological-microbial interrelationships and estuarine biodegradative processes. In: Stevenson, L. H. & Colwell, R. R. (eds.), Estuarine and Microbial Ecology. University of South Carolina Press, Columbia: 483–489.Google Scholar
  58. Micoletzky, H., 1925. Die freilebenden Süsswasser- und Moornematoden Dänemarks. K. danske Vidensk. Selsk. Skr. 10: 55–310.Google Scholar
  59. Moore, P. G., 1971. The nematode fauna associated with holdfasts of kelp (Laminaria hyperborea) in north-east Britain. J. mar. biol. Ass. U.K. 51: 589–604.CrossRefGoogle Scholar
  60. Muus, B. J., 1967. The fauna of Danish estuaries and lagoons. Distribution and ecology of dominating species in the shallow reaches of the mesohaline zone. Meddr. danm. Fisk. Havunders. 5: 1–316.Google Scholar
  61. Niemi, Å., 1975. Ecology of phytoplankton in the Tvärminne area, SW coast of Finland. 2. Primary production and environmental conditions in the archipelago and the sea zone. Acta bot. fenn. 100: 1–73.Google Scholar
  62. Novak, R., 1982. Spatial and seasonal distribution of the meiofauna in the seagrass Posidonia oceanica. Neth. J. Sea Res. 16: 380–388.CrossRefGoogle Scholar
  63. Ott, J., 1967. Vertikalverteilung von Nematoden in Beständen nordadriatischer Sargassaceen. Helgoländer wiss. Meeresunters. 15: 412–428.CrossRefGoogle Scholar
  64. Otto, G., 1936. Die Fauna der Enteromorpha-zone in der Kieler Bucht. Kiel Meeresforsch. 1: 1–48.Google Scholar
  65. Odum, E. E. & Heald, E. J., 1972. Trophic analysis of an estuarine mangrove community. Bull. mar. Sci. 22: 671–738.Google Scholar
  66. Pieczyńska, E. & Spodniewska, 1963. Occurrence and colonization of periphyton organisms in accordance with the type of substrate. Ekol. pol. 11: 533–545.Google Scholar
  67. Prejs, K., 1973. Nematodes (Nematoda) in the rhizosphere of Potamogeton lucens L. and Potamogeton perfoliatus L. in Mikolajskie Lake. Bull. Acad. pol. Sci. Cl. 2. Sér. Sci. biol. 21: 585–588.Google Scholar
  68. Prejs, K. & Wiktorzak, 1976. The fauna of the root region of macrophytes. In: Pieczyńska, E. (ed.), Selected Problems of Lake Littoral Ecology. Warsaw Univ.: 145–153.Google Scholar
  69. Rasmussen, E., 1973. Systematics and ecology of the Isefjord marine fauna. Ophelia 11: 1–495.Google Scholar
  70. Remane, A., 1934. Die Brackwasserfauna. Verh. dt. zool. Ges. 34: 34–74.Google Scholar
  71. Remane, A., 1940. Einführung in die zoologische Ökologie der Nord- und Oostsee. Akad. Verlags Tierwelt N. Oostsee, Leipzig, 238 pp.Google Scholar
  72. Riemann, F., 1966. Die interstitielle Fauna im Elbe-Aestuar. Verbreitung und Systematik. Arch. Hydrobiol. Suppl. 31: 1–279.Google Scholar
  73. Riemann, F., 1975. Einwanderung mariner Nematoden in das Süsswasser. Untersuchungen in Kolumbien im vergleich mit aussertropischen Regionen. Int. Revue ges. Hydrobiol. 60: 393–407.Google Scholar
  74. Riemann, F., 1977. On hemisessile nematodes with flagelliform tails in marine soft bottoms and on micro-tubes found in deep sea sediments. Mikrofauna Meeresboden 40: 1–15.Google Scholar
  75. Riemann, F., 1980. Nematoden aus dem Brackwasser des Weser-Ästuars und beschreibung von drei Monhysteroidea. Veröff. Inst. Meeresforsch. Bremerh. 17: 213–223.Google Scholar
  76. Riemann, F. & Schrage, M., 1978. The mucus-trap hypothesis on feeding of aquatic nematodes and implications for biodegradation and sediment texture. Oecologia 34: 75–88.CrossRefGoogle Scholar
  77. Reise, K., 1981. High abundance of small zoobenthos around biogenic structures in tidal sediments of the Wadden Sea. Helgoländer wiss. Meeresunters. 34: 413–425.CrossRefGoogle Scholar
  78. Rybak, J. I. & Sikorska, U., 1976. Environment. In: Pieczyńska, E. (ed.), Selected Problems of Lake Littoral Ecology. Warsaw Univ.: 7–26.Google Scholar
  79. Sanders, H. L., 1960. Benthic studies in Buzzards Bay. 3. The structure of the soft bottom community. Limnol. Oceanogr. 5: 138–153.Google Scholar
  80. Schiemer, F., Jensen, P. & Riemann, F., in press. Free-living nematodes of the Bothnian Bay. Ann. zool. fenn. 20.Google Scholar
  81. Surrey-Gent, S. G., 1981. Distribution of Anoplostoma viviparum (Nematoda) in Southampton water sediments. Mar. Biol. 62: 157–160.CrossRefGoogle Scholar
  82. Sørensen, T., 1948. A method of establishing groups of equal amplitude in plant sociology based on similarity of species content and its implication to analyses of the vegetation on Danish commons. Biol. Skr. 5: 1–34.Google Scholar
  83. Teal, J. M. & Kanwischer, J., 1961. Gas transport in the marsh grass, Spartine alterniflora. Limnol. Oceanogr. 6: 388–399.Google Scholar
  84. Teal, J. M. & Wieser, W., 1966. The distribution and ecology of nematodes in a Georgia salt marsh. Limnol. Oceanogr. 11: 217–222.Google Scholar
  85. Tenore, K. R., Tietjen, J. H. & Lee, J. J., 1977. Effects of meiofauna on incorporation of aged eelgrass by the polychaete, Nepthys incisa. J. Fish. Res. Bd Can. 34: 563–567.Google Scholar
  86. Tietjen, J. H., 1977. Population distribution and structure of the free-living nematodes of Long Island Sound. Mar. Biol. 43: 123–136.CrossRefGoogle Scholar
  87. Tietjen, J. H., 1980. Population structure and species composition of the free-living nematodes inhabiting sands of the New York Bight Apex. Est. coast. mar. Sci. 10: 61–73.Google Scholar
  88. Von Thun, W., 1968. Autoökologische Untersuchungen an freilebende Nematoden des Brackwasser. Ph.D. Thesis, Univ. Kiel, FRG, 72 pp.Google Scholar
  89. Vranken, G., Thielemans, L. K., Heip, C. & Vandycke, M., 1981. Aspects of the life cycle of Monhystera parelegantula (Nematoda, Monhysteridae). Mar. Ecol. Prog. Ser. 6: 67–72.Google Scholar
  90. Wallentinus, I., 1979. Environmental influence on benthic macrovegetation in the Trosa-Askö area, northern Baltic proper. 2. The ecology of macroalgae and submerged phaerogams. Contrib. Askö Lab. Stockholm 25: 1–210.Google Scholar
  91. Warwick, R. M., 1977. The structure and seasonal fluctuations of phytal marine nematode associations on the Isle of Scilly. In: Keegan, B. F., Céidigh, P. O. & Boaden, P. J. S. (eds.), Biology of Benthic Organisms. Pergamon Press, N.Y., Oxford: 577–585.Google Scholar
  92. Warwick, R. M., 1981a. The influence of temperature and salinity on energy partitioning in the marine nematode Diplolaimelloides bruciei. Oecologia 51: 318–325.CrossRefGoogle Scholar
  93. Warwick, R. M., 1981b. Survival strategies of meiofauna. In: Jones, N. V. & Wolff, W. J. (eds.), Feeding and Survival Strategies of Estuarine Organisms. Plenum Press, N.Y.: 39–52.Google Scholar
  94. Whittaker, R. H., 1965. Dominance and diversity in plant communities. Science 147: 250–260.PubMedGoogle Scholar
  95. Wieser, W., 1951. Untersuchungen über die algenbewohnende Mikrofauna marine Hartböden. 1. Zur Ökologie und Systematik der Nematodenfauna von Plymouth. Ost. zool. Z. 3: 425–480.Google Scholar
  96. Wieser, W., 1952. Investigations on the microfauna in inhabiting seaweeds on rocky coasts. 4. Studies on the vertical distribution of the fauna inhabiting seaweeds below the Plymouth Laboratory. J. mar. biol. Ass. U.K. 31: 145–174.CrossRefGoogle Scholar
  97. Wieser, W., 1954. Untersuchungen über die algenbewohnende Mikrofauna marine Hartböden. 3. Zur Systematik der freilebenden Nematoden des Mittelmeeres mit einer Ökologische Untersuchung über die beziehung zwischen Nematodenbesiedlung und sedimentreichtum des Habitats. Hydrobiologia 6: 144–217.CrossRefGoogle Scholar
  98. Wieser, W., 1959. Zur Ökologie der Fauna marine Algen mit besonderer Berücksichtigung des Mittelmeeres. Int. Revue ges. Hydrobiol. 44: 137–180.Google Scholar
  99. Wieser, W. & Kanwischer, J., 1961. Ecological and physiological studies on marine nematodes from a small salt marsh near Woods Hole, Massachusetts. Limnol. Oceanogr. 6: 262–270.CrossRefGoogle Scholar
  100. Wium-Andersen, S., 1971. Photosynthetic uptake of free CO2 by the roots of Lobelia dortmanna. Physiol. Pl. 25: 245–248.CrossRefGoogle Scholar
  101. Wood, D. D. & Hayasaka, S. S., 1981. Chemotaxis of rhizoplane bacteria to amino acids comprising eelgrass (Zostera marina L.) root exudate. J. exp. mar. Biol. Ecol. 50: 153–161.CrossRefGoogle Scholar

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© Dr W. Junk Publishers 1984

Authors and Affiliations

  • P. Jensen
    • 1
  1. 1.Marine Biological LaboratoryUniversity of CopenhagenHelsingørDenmark

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