Abstract
The changes in the community dynamics of infaunal nematodes associated with tropical Australian intertidal seagrasses at 4 estuarine sites were investigated through 3 seasons (autumn, winter and spring). Nematode densities were highest in winter in all but one of the sites, ranging from 1971 to 3084 inds./10 cm2, with one site showing a highest density of 3411 inds./10 cm2 in spring. Multiple regression revealed significant correlations between nematode density peaks and seasonal changes in temperature, salinity and surface seagrass cover. Non-metric Multi-Dimensional Scaling revealed that the communities were characterised by relatively low within-site spatial variability but relatively high temporal variability through the three seasons. This temporal variability was largely due to significant increases in abundance of epistrate-feeding species in winter and spring. An investigation of the dominant epistrate-feeding nematodes revealed that predominantly infaunal species were responsible for overall winter and spring density increases. This study provides further evidence of the role played by temperature in regulating tropical, intertidal meiobenthic communities but also indirectly provides evidence of micro-scale seagrass canopy effects (micro-algal supply and availability) that may further enhance the impacts of these larger-scale seasonal environmental changes on the infaunal nematode community.
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Alongi, D. M., 1986. Population structure and trophic composition of the free–living nematodes inhabiting carbonate sands of Davies Reef, Great Barrier Reef, Australia. Aust. J. mar. Freshw. Res. 37: 609–619.
Alongi, D. M., 1987a. Inter–estuary variation and intertidal zonation of free–living nematode communities in tropical mangrove systems. Mar. Ecol. Prog. Ser. 40: 103–114.
Alongi, D. M., 1987b. Intertidal zonation and seasonality of meiobenthos in tropical mangrove estuaries. Mar. Biol. 95: 447–458.
Alongi, D. M., 1988. Bacterial productivity and microbial biomass in tropical mangrove sediments. Microbial Ecol. 15: 59–79.
Alongi, D. M., 1990. Community dynamics of free–living nematodes in some tropical mangrove and sandflats habitats. Bull. Mar. Sci. 46(2): 358–373.
Alongi, D. M. & J. H. Tietjen, 1980. Population growth and trophic interactions among free–living marine nematodes. In K. R. Tenore, B. C. Coull (eds), Marine Benthic Dynamics. University of South Carolina Press. Columbia: 151–166.
Aryuthaka, C., 1991. Meiofauna community in Khung Kraben Bay, Chanthaburi, East Thailand. Thai mar. Fish. Res. Bull. 2: 47–57.
Aryuthaka, C. & T. Kikuchi, 1996. Sediment meiobenthos community in the seagrass (Zostera marina L.) bed and its vicinity in Amakusa, south Japan. I. Spatial and seasonal variation of nematode communities. Publ. Amakusa Mar. Biol. Lab. 12: 79–107.
Austen, M. C. & R. M. Warwick, 1989. Comparison of univariate and multivariate aspects of estuarine meiobenthic community structure. Estuar. coast. shelf Sci. 29: 23–42.
Bell, S. S., J. C. Kern & K. Walters, 1984a, Sampling for meiofaunal taxa in seagrass systems: lessons from studies of a subtropical Florida estuary, U.S.A. Ind. Ed. Ser. 12: 239–245.
Bell, S. S., K. Walters, J. C. Kern 1984b, Meiofauna from seagrass habitats: a review and prospectus for future research. Estuaries 7: 331–338.
Bouwman, L. A., 1983. A survey of nematodes from the Ems Estuary. Part 2: Species assemblages and associations. Zool. Jahrb. (Syst. Oekol. Geogr. Tiere) 110(3): 345–376.
Buffan–Dubau, E. & K. R. Carman, 2000. Diel feeding behavior of meiofauna and their relationships with microalgal resources. Limnol. Oceanogr. 45(2): 381–395.
Commito, J. A. & G. Tita, 2002. Differential dispersal rates in an intertidal meiofaunal assemblage. J. exp. mar. Biol. Ecol. 268: 237–256.
Decho, A. W., W. D. Hummon & J. W. Fleeger, 1985. Meiofaunasediment interactions around subtropical seagrass sediments using factor analysis. J. mar. Res. 43: 237–255.
Den Hartog, C., 1967. The structural aspect in the ecology of seagrass communities. Helgol. Wiss. Meeresunters. 15: 648–659.
De Troch, M., S. Gurdebeke, F. Fiers & M. Vincx, 2001a. Alpha and Beta diversity of harpacticoid copepods in a tropical seagrass bed: the relation between diversity and species' range size distribution. Mar. Ecol. Prog. Ser. 215: 225–236.
De Troch, M., S. Gurdebeke, F. Fiers & M. Vincx, 2001b. Zonation and structuring factors of meiofauna communities in a tropical seagrass bed (Gazi Bay, Kenya). J. Sea Res. 45: 45–61.
Edgar, G. J., 1999, Experimental analysis of structural versus trophic importance of seagrass beds. I. Effects on macrofaunal and meiofaunal invertebrates. Vie Milieu 49(4): 239–248.
Eskin, R. A. & B. C. Coull, 1987. Seasonal and three–year variability of meiobenthic nematode populations at two estuarine sites. Mar. Ecol. Prog. Ser. 41: 295–303.
Faith, D. P., P. R. Minchin & L. Belbin, 1987. Compostional dissimilarity as a robust measure of ecological distance. Vegetatio 69: 57–68.
Furnas, M. J., (1989). Cyclonic disturbance and a phytoplankton bloom in a tropical shelf ecosystem. In Okaichi, T., D. M. Anderson, T. Nemoto (eds), Red Tides: Biology, Environmental Science and Toxicology. Elsevier, Amsterdam: 273–276.
Furnas, M. J., & A. W. Mitchel (1986). Phytoplankton dynamics in the central Great Barrier Reef. I. Seasonal changes in biomass and community structure and their relation to intrusive activity. Cont. Shelf Res. 6: 363–384.
Furnas, M.J., & A. W. Mitchel (1987). Phytoplankton dynamics in the central Great Barrier Reef. II. Primary production. Cont. Shelf Res. 7: 1049–1062.
Gwyther, J. & P. G. Fairweather (2002). Colonisation by epibionts and meiofauna of real and mimic pneumatophores in a cool temoerate mangrove habitat. Mar. Ecol. Prog. Ser. 229: 137–149.
Heip, C., M. Vincx & G. Vranken, 1985, The Ecology of Marine Nematodes. Oceanogr. mar. biol. Ann. Rev. 23: 399–489.
Hentschel, U., E. C. Berger, M. Bright, H. Felbeck & J. A. Ott, 1999. Metabolism of nitrogen and sulfur in ectosymbiotic bacteria of marine nematodes (Nematoda, Stilbonematinae). Mar. Ecol. Prog. Ser. 183: 149–158.
Hicks, G. R. F., 1986. Distribution and behaviour of meiofaunal copepods inside and outside seagrass beds. Mar. Ecol. Prog. Ser. 31: 159–170.
Hodda, M. & W. L. Nicholas (1986). Temporal changes in littoral meiofauna from the Hunter River Estaury. Aust. J. mar. Freshw. Res. 37: 729–741.
Hopper, B. E. & S. P. Meyers, 1967a. Folicolous marine nematodes on turtle grass, Thalassia testudinum Konig, in Biscayne Bay, Florida. Bull. mar. Sci. 17: 471–517.
Hopper, B. E. & S. P. Meyers, 1967b. Population studies on benthic nematodes within a subtropical seagrass community Mar. Biol. 1: 85–96.
Jensen, P., 1982. Diatom–feeding behaviour of the free–living marine nematode Chromadorita tenuis. Nematologica 28: 71–76.
Jensen, P., 1984. Ecology of benthic and epiphytic nematodes in brackish waters. Hydrobiologia 108: 201–217.
Jensen. P., 1987a. Feeding ecology of free–living aquatic nematodes. Mar. Ecol. Prog. Ser. 35: 187–196.
Jensen, P., 1987b. Differences in microhabitat, abundance, biomass and body size between oxybiotic and thiobiotic free–living marine nematodes. Oecologia 71: 564–567.
Joint, I. R., J. M. Gee & R. M. Warwick, 1982. Determination of fine–scale vertical distribution of microbes and meiofauna in an intertidal sediment. Mar. Biol., 72: 157–164.
Lanyon, J. M. & H. Marsh, 1995. Temporal changes in the abundance of some tropical intertidal seagrasses in North Queensland. Aquat. Bot. 49: 217–237.
Lanyon, J. M., C. J. Limpus & H. Marsh, 1989. Dugongs and turtles: grazers in the seagrass system. In Larkum, A. W. D., A. J. McComb, S. A. Shepherd,. (eds), Biology of Seagrasses: A Treatise on the Biology of Seagrasses with Special Reference to the Australian Region. Elsevier. Amsterdam: 601–634.
Lewis, III, F. G., 1984, Distribution of macrobenthic crustaceans associated with Thalassia, Halodule and bare sand substrata. Mar. Ecol. Prog. Ser. 19: 101–113.
Lewis, D. W. & D. McConchie, 1994. Practical sedimentology–2nd edn. Chapman & Hall. New York. 213 pp.
Moens, T. & M. Vincx 1997. Observations on the feeding ecology of estuarine nematodes. J. mar. biol. Ass. U.K. 77: 211–227.
Ndaro, S. G. M. & E. Olafsson, 1999. Soft–bottom fauna with emphasis on nematode assemblage structure in a tropical intertidal lagoon in Zanzibar, eastern Africa: I. Spatial variability. Hydrobiologia 405: 133–148.
Nehring, S., 1992. Die Vegetarier unter den freilebenden Nematoden. 2. Die Depositfresser. Mikrokosmos 81: 260–266.
Nicholas, W. L., J. A. Elek, A. C. Stewart, & T. G. Marples, 1991. The nematode fauna of a temperate Australian mangrove mudflat; its population density, diversity and distribution. Hydrobiologia 209: 13–27.
Olafsson, E., 1995. Meiobenthos in mangrove areas in eastern Africa with emphasis on assemblage structure of free–living marine nematodes. Hydrobiologia 312: 47–57.
Olafsson, E. & R. Elmgren, 1997. Seasonal dynamics of sublittoral meiobenthos in relation to phytoplankton sedimentation in the Baltic Sea. Estuar. coast. shelf Sci. 45: 149–164.
Olafsson, E., H. Modig, W. J. van de Bund, 1999. Species specific uptake of radio–labelled phytodetritus by benthic meiofauna from the Baltic Sea. Mar. Ecol. Prog. Ser. 177: 63–72.
Orth, R. J., K. L. Heck Jr. & J. Van Montfrans, 1984. Faunal communities in seagrass beds: a review of the influence of plant structure and prey characteristics on predator–prey relationships. Estuaries 7: 339–350.
Ott, J., 1972. Determination of fauna boundaries of nematodes in an intertidal sand–flat. Int. Rev. ges. Hydrobiol. 57: 645–663.
Paula, J., P. Fidalgo e Costa, A. Martins, & D. Gove, (2001). Patterns of abundance of seagrasses and associated infaunal communities at Inhaca Island, Mozambique. Estuar. coast shelf Sci. 53: 307–318.
Pinckney, J., Y. Piceno, & C. R. Lovell, 1994. Short–term changes in the vertical distribution of benthic microalgal biomass in intertidal muddy sediments. Diatom Res. 9: 143–153.
Platt, H. M., 1977. Vertical and horizontal distribution of free–living marine nematodes from an intertidal Strangford Lough, Northern Ireland. Cah. Biol. Mar. 18: 261–273.
Platt, H. M. & R.M. Warwick, 1983. Free–living marine nematodes. Part I. British Enoplids. In Kermack, D. M., R. S. K. Barnes, (eds), Synopses of the British Fauna (New Series) 28. Cambridge University Press. Cambridge: 307 pp.
Platt, H. M. & R. M. Warwick, 1988. Free–living marine nematodes. Part II. British Chromadorids. In Kermack, D. M., R. S. K. Barnes, (eds), Synopses of the British Fauna (New Series) 38. Cambridge University Press. Cambridge: 502 pp.
Polz, M. F., H. Felbeck, R. Novak, M. Nebelsick & J. A. Ott, 1992. Chemoautotrophic, sulfur–oxidising symbiotic bacteria on marine nematodes: morphological and biochemical characterisation. Microb. Ecol. 24: 313–329.
Riemann, F., 1988. Nematoda. In Higgins, R. P., H. Thiel, (eds), Introduction to the Study of Meiofauna. Smithsonian Institution Press. Washington D.C., London: 293–301.
Riese, K., 1985. Tidal Flat Ecology. Berlin: Springer–Verlag. 1985: 211 pp.
Romeyn K. & L. A. Bouwman, 1983. Food selection and consumption by estuarine nematodes. Hydrobiol. Bull. 17: 103–109.
Rudnick, D. T., R. Elmgren & J. B. Frithsen, 1985. Meiofaunal prominence and benthic seasonality in a coastal marine ecosystem. Oecologia 67: 157–168.
Schiemer, F., R. Novak & J. A. Ott, 1990. Metabolic studies on thiobiotic free–living nematodes and their symbiotic microorganisms. Mar. Biol. 106: 129–137.
Schratzberger, M. & R. M. Warwick, 1999. Impact of predation and sediment disturbance by Carcinus maenas (L.) on free–living nematode community structure. J. exp. mar. Biol. Ecol. 235: 255–271.
Soetart, K., M. Vincx, J. Wittoeck, & M. Tulkens, 1995. Meiobenthic distribution and nematode community structure in five European estuaries. Hydrobiologia 311: 185–206.
Sogard, S. M., 1984. Utilisation of meiofauna as a food source by a grassbed fish, the spotted dragonet Callionymus pauciradiatus. Mar. Ecol. Prog. Ser. 17: 183–191.
Sokal, R. R. & F. J. Rohlf, 1998. Biometry. The Principles and Practice of Statistics in Biological Research. W.H. Freeman & Company, New York. 887 pp.
Steyaert. M., P. M. J. Herman, T. Moens, J. Widdows & M. Vincx, 2001. Tidal migration of nematodes on an estuarine tidal flat (the Molenplaat, Schelde Estuary, SWNetherlands). Mar. Ecol. Prog. Ser. 224: 299–304.
Tietjen, J. H., 1969. The ecology of shallow water meiofauna in teo New England estuaries. Oecologia 2: 251–291.
Tietjen, J. H. 1991. Ecology of free–living nematodes from the Continental Shelf of the Central Great Barrier Reef Province. Estuar. coast shelf Sci. 32: 421–438.
Tita, G., M. Vincx & G. Desrosiers, 1999. Size spectra, body width and morphotypes of intertidal nematodes: an ecological interpretation. J. mar. biol. Ass. U.K. 79: 1007–1015.
Van Raalte, C. D., I. Valiela & J. M. Teal, 1976. Production of epibenthic salt marsh algae: Light and nutrient. Limnol. Oceanogr. 21: 862–872.
Viillano, N. & R. M. Warwick, 1995. Meiobenthic communities associated with the seasonal cycle of growth and decay of Ulva rigida Agardh, in the Palude Della Rosa, Lagoon of Venice. Estuar. coast. shelf Sci. 41: 181–194.
Walker, D., W. Dennison & G. Edgar, 1999, Status of Australian seagrass research and knowledge. In Butler, A & P. Jernakoff (eds), Seagrass in Australia: Strategic Review and Development of an R & D Plan. CSIRO Publishing, Australia: 1–18 pp.
Walters, K., 1991. Influences of abundance, behavior, species composition, and ontogenetic stage on active emergence of meiobenthic copepods in subtropical habitats. Mar. Biol. 108: 207–215.
Walters, K. & S. M. Bell, 1986. Diel patterns of active vertical migration in seagrass meiofauna. Mar. Ecol. Prog. Ser. 34: 95–103.
Walters, K. & S. M. Bell, 1994.Significane of copepod emergence to benthic, pelagic, and phytal linkages in a subtidal seagrass bed. Mar. Ecol. Prog. Ser. 108: 237–249.
Warwick, R. M. & J. M. Gee, 1984. Community structure of estuarine meiobenthos. Mar. Ecol. Prog. Ser. 18: 97–111.
Warwick. R. M. & R. Price, 1979. Ecological and metabolic studies on free–living nematodes from an estuarine mud–flat. Estuar. coast. mar. Sci. 9: 257–271.
Warwick, R. M., H. M. Platt & P. J. Somerfield, 1998. Free–living marine nematodes. Part III. British Monhysterids. In Barnes, R. S. K., J. H. Crothers (eds), Synopses of the British Fauna (New Series) 53. Field Studies Council. Shrewsbury: 296 pp.
Wieser, W., 1953. Die beziehung zwischen mundhohlengestalt, ernahrungsweise und vorkommen bei freilebenden marinen nematoden. Ark. Zool. 4: 439–484.
Wieser, W., 1959. Free–living Marine Nematodes IV. General Part. Reports of the Lund University Chile Expedition 1948–49. 34. Lunds Universitets Arsskrift. N.F.Avd. Bd 55. Nr 5: 1–111.
Wieser, W., 1960. Benthic studies in Buzzards Bay II. The Meiofauna. Limnol. Oceanogr. 5: 121–137.
Wieser, W. & J. Kanwisher, 1960. Ecological and physiological studies on marine nematodes from a salt marsh nearWoods Hole, Massachusetts. Limnol. Ocean. 6: 262–270.
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Fisher, R. Spatial and temporal variations in nematode assemblages in tropical seagrass sediments. Hydrobiologia 493, 43–63 (2003). https://doi.org/10.1023/A:1025481732236
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DOI: https://doi.org/10.1023/A:1025481732236