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Spatial distribution of subtidal meiobenthos along estuarine gradients in two southern European estuaries (Portugal)

Published online by Cambridge University Press:  13 July 2009

Ana Sofia Alves ,
Helena Adão ,
Joana Patrício ,
João Magalhães Neto ,
Maria José Costa  and
João Carlos Marques
Ana Sofia Alves
Affiliation:
IMAR (Institute of Marine Research), c/o Biology Department, University of Évora, Apartado 94, 7002-554 Évora, Portugal
Helena Adão*
Affiliation:
IMAR (Institute of Marine Research), c/o Biology Department, University of Évora, Apartado 94, 7002-554 Évora, Portugal
Joana Patrício
Affiliation:
IMAR (Institute of Marine Research), c/o Department of Zoology, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal
João Magalhães Neto
Affiliation:
IMAR (Institute of Marine Research), c/o Department of Zoology, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal
Maria José Costa
Affiliation:
Institute of Oceanography, Faculty of Sciences, University of Lisbon, Campo Grande, 1749-016 Lisbon, Portugal
João Carlos Marques
Affiliation:
IMAR (Institute of Marine Research), c/o Department of Zoology, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal
*
Correspondence should be addressed to: H. Adão, IMAR (Institute of Marine Research), c/o Biology Department, University of Évora, Apartado 94, 7002-554 Évora, Portugal email: [email protected]
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Abstract

The spatial variation in abundance and composition of subtidal meiobenthos communities was studied in two Portuguese estuaries under distinct degrees of anthropogenic pressure. Samples were collected from 20 sampling stations along both estuarine gradients from freshwater (<0.5) to euhaline areas (>30). Of these stations 11 were located in the Mondego estuary, a system exposed to high anthropogenic stress, and 9 in the Mira estuary, a naturally stressed system located inside the Natural Park ‘Costa Vicentina’ (south-western coast of Portugal).

Total meiobenthos density was higher in the Mira estuary and in both estuaries the community was dominated by nematodes. Among the twelve taxa identified in the Mira estuary, Harpacticoid copepods and Polychaeta were the second and the third most abundant groups respectively. In the Mondego estuary, Polychaeta was the second while Harpacticoid copepods was the third most abundant group in the thirteen total taxa recorded.

Estuarine gradients of salinity, particles size and water nutrients were clearly detected in both estuaries and there was significant spatial heterogeneity in abundance and composition of the subtidal meiobenthos communities along these environmental gradients. Accordingly, three distinct sections were identified in both estuaries: (i) freshwater sections, where total density, and density of nematodes and Harpacticoid copepods reached minimum values; (ii) oligohaline and mesohaline sections, where the total density was low and diversity was poor; and (iii) polyhaline and euhaline sections, where both total density and diversity reached the highest values.

The similar spatial distribution of meiobenthos assemblages in both estuaries suggests that natural stressors may be the major factors controlling the physicochemical conditions that determine meiobenthos community patterns. The mesoscale variability of subtidal meiobenthos density and composition within estuaries (in the order of kilometres) seems to be more important than the variability between estuaries (at the scale of hundreds of kilometres), a common feature in intertidal systems. From the management point of view, these results, based on higher taxa resolution, represent an obvious constraint to the applicability of ecological quality evaluation tools.

Keywords

subtidal meiofaunaestuarine gradientsnatural versus anthropogenic disturbancePortugal
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 89 , Issue 8 , December 2009 , pp. 1529 - 1540
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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References

REFERENCES

Anon (1959) Symposium on the Classification of Brackish Waters. Venice, 8–14 April 1958. Archivio di Oceanografia e Limnologia, 11 (supplement).Google Scholar
Atrill, M. (2002) A testable linear model for diversity trends in estuaries. Journal of Animal Ecology 71, 262–269.CrossRefGoogle Scholar
Austen, M.C. and Warwick, R.M. (1989) Comparison of univariate and multivariate aspects of estuarine meiobenthic community structure. Estuarine, Coastal and Shelf Science 29, 23–42.CrossRefGoogle Scholar
Bouwman, L.A. (1983) A survey of Nematoda from the Ems estuary: species assemblages and associations. Zoologische Jahrbucher, Systematik, Okologie und Geographie der Tiere 110, 345–376.Google Scholar
Brown, A.C. and McLachlan, A. (1990) Ecology of sandy shores. Amsterdam: Elsevier.Google Scholar
Bulger, A.J., Hayden, B.P., Monaco, M.E., Nelson, D.M. and McCormick-Ray, M.G. (1993) Biologically-based estuarine salinity zones derived from a multivariate analysis. Estuaries 16, 311–322.CrossRefGoogle Scholar
Clarke, K.R. (1993) Non-parametric multivariate analyses of changes in community structure. Australian Journal of Ecology 18, 117–143.CrossRefGoogle Scholar
Clarke, K.R. and Ainsworth, M. (1993) A method for linking multivariate community structure to environmental variables. Marine Ecology Progress Series 92, 205–219.CrossRefGoogle Scholar
Clarke, K.R. and Warwick, R.M. (2001) Change in marine communities: an approach to statistical analysis and interpretation. 2nd edition. Plymouth: Plymouth Marine Laboratory.Google Scholar
Costa, M.J., Catarino, F. and Bettencourt, A. (2001) The role of salt marshes in the Mira estuary (Portugal). Wetlands Ecology and Management 9, 121–134.CrossRefGoogle Scholar
Coull, B.C. (1985) Long-term variability of estuarine meiobenthos: an 11 year study. Marine Ecology Progress Series 24, 205–218.CrossRefGoogle Scholar
Coull, B.C. (1999) Role of meiofauna in estuarine soft-bottom habitats. Australian Journal of Ecology 24, 327–343.CrossRefGoogle Scholar
Coull, B.C. and Chandler, T. (1992) Pollution and meiofauna field, laboratory and mesocosm studies. Oceanography and Marine Biology: an Annual Review 30, 191–271.Google Scholar
Dauvin, J.-C. 2007. Paradox of estuarine quality: benthic indicators and indices, consensus or debate for the future. Marine Pollution Bulletin 55, 271–281.CrossRefGoogle ScholarPubMed
Derycke, S., Hendrickx, F., Backeljau, T., D'Hondt, S., Camphijn, L., Vincx, M. and Moens, T. (2007) Effects of sublethal abiotic stressors on population growth and genetic diversity of Pellioditis marina (Nematoda) from the Westerschelde estuary. Aquatic Toxicology 82, 110–119.CrossRefGoogle ScholarPubMed
Elliot, M. and McLusky, D.S. (2002) The need for definitions in understanding estuaries. Estuarine, Coastal and Shelf Science 55, 815–827.CrossRefGoogle Scholar
Elliot, M. and Quintino, V. (2007) The estuarine quality paradox, environmental homeostasis and the difficulty of detecting anthropogenic stress in naturally stressed areas. Marine Pollution Bulletin 54, 640–645.CrossRefGoogle Scholar
Essink, K. and Keidel, H. (1998) Change in estuarine nematode communities following a decrease of organic pollution. Aquatic Ecology 32, 195–202.CrossRefGoogle Scholar
Flindt, M.R., Kamp-Nielsen, L., Marques, J.C., Pardal, M.A., Bocci, M., Bendoricchio, G., Salomonsen, J., Nielsen, S.N. and Jørgensen, S.E. (1997) Description of three shallow estuaries: Mondego river (Portugal), Roskilde Fjord (Denmark) and the lagoon of Venice (Italy). Ecological Modelling 102, 17–31.CrossRefGoogle Scholar
Forster, S.J. (1998) Osmotic stress tolerance and osmoregulation of intertidal and subtidal nematodes. Journal of Experimental Marine Biology and Ecology 224, 109–125.CrossRefGoogle Scholar
Giere, O. (1993) Meiobenthology. Berlin: Springer-Verlag.CrossRefGoogle Scholar
Heip, C.H., Vincx, M. and Vranken, G. (1985) The ecology of marine Nematoda. Oceanography and Marine Biology: an Annual Review 23, 399–489.Google Scholar
Higgins, P.R. and Thiel, H. (1988) Introduction to the study of meiofauna. Washington, DC: Smithsonian Institution Press.Google Scholar
Li, J. and Vincx, M. (1993) The temporal variation of intertidal nematodes in the Westerschelde. I. The importance of an estuarine gradient. Netherlands Journal of Aquatic Ecology 27, 319–326.CrossRefGoogle Scholar
Li, J., Vincx, M., Herman, P.M.J.Heip, C.H. (1997) Monitoring meiobenthos using cm-, m- and km-scales in the Southern Bight of the North Sea. Marine Environmental Research 34, 265–278.CrossRefGoogle Scholar
Lillebø, A.I., Teixeira, H., Pardal, M.A. and Marques, J.C. (2007) Applying quality status criteria to a temperate estuary before and after the mitigation measures to reduce eutrophication symptoms. Estuarine, Coastal and Shelf Science 72, 177–187.CrossRefGoogle Scholar
Limnologisk, Metodik (1992) Ferskvandsbiologisk Laboratorium. In Universitet, Københavns (ed.) København: Akademisk Forlag.Google Scholar
Marques, J.C., Maranhão, P. and Pardal, M.A. (1993) Human impact assessment on the subtidal macrobenthic community structure in the Mondego Estuary (Western Portugal). Estuarine, Coastal and Shelf Science 37, 403–419.CrossRefGoogle Scholar
Marques, J.C., Neto, J.M., Patrício, J., Pinto, R., Teixeira, H. and Veríssimo, H. (2007) Monitoring the Mondego estuary. Anthropogenic changes and their impact on ecological quality. Preliminary results from the first assessment of the effects of reopening the communication between the North and South arms on the eutrophication state of the system. Final Report, January 2007. IMAR/INAG, 87 pp.Google Scholar
McLusky, D.S. and Elliot, M. (2004) The estuarine ecosystem—ecology, threats and management. Oxford: Oxford University Press.CrossRefGoogle Scholar
Moens, T. and Vincx, M. (2000) Temperature and salinity constraints on the life cycle of two brackish-water nematode species. Journal of Experimental Marine Biology and Ecology 243, 115–135.CrossRefGoogle Scholar
Neto, J.M., Flindt, M.R., Marques, J.C. and Pardal, M.A. (2008) Modelling nutrient mass balance in a meso-tidal estuary: implications for management. Estuarine, Coastal and Shelf Science 76, 175–185.CrossRefGoogle Scholar
Parsons, T.R., Takahashi, M. and Hargrave, B. (1990) Biological oceanographic processes. 3rd edition. Oxford: Pergamon Press.Google Scholar
Patrício, J., Neto, J.M., Teixeira, H. and Marques, J.C. (2007) Opportunistic macroalgae metrics for transitional waters. Testing tools to assess ecological quality status in Portugal. Marine Pollution Bulletin 54, 1887–1896.CrossRefGoogle ScholarPubMed
Paula, J., Silva, I.C., Francisco, S.M. and Flores, A.V. (2006) The use of artificial benthic collectors for assessment of spatial patterns of settlement of megalopae of Carcinus maenas (L.) (Brachyura: Portunidae) in the lower Mira Estuary, Portugal. Hydrobiologia 557, 69–77.CrossRefGoogle Scholar
Phillips, F.E. and Fleeger, J.W. (1985) Meiofauna meso-scale variability in two estuarine habitats. Estuarine, Coastal and Shelf Science 21, 745–756.CrossRefGoogle Scholar
Sandulli, R. and Pickney, J. (1999) Patch sizes and spatial patterns of meiobenthic copepods and benthic microalgae in sandy sediments: a microscale approach. Journal of Sea Research 41, 179–187.CrossRefGoogle Scholar
Santos, P.J.P., Castel, J. and Souza-Santos, L.P. (1996) Seasonal variability of meiofaunal abundance in the oligo-mesohaline area of the Gironde Estuary, France. Estuarine, Coastal and Shelf Science 43, 549–563.CrossRefGoogle Scholar
Schratzberger, M. and Warwick, R.M. (1998) Effects of the intensity and frequency of organic enrichment on two estuarine nematode communities. Marine Ecology Progress Series 164, 83–94.CrossRefGoogle Scholar
Schratzberger, M., Bolam, S., Whomersley, P., Warr, K. and Rees, H. (2004) Development of a meiobenthic nematode community following the intertidal placement of various types of sediment. Journal of Experimental Marine Biology and Ecology 303, 79–96.CrossRefGoogle Scholar
Smol, N., Willems, K.A., Govaere, J.C. and Sandee, A.J.J. (1994) Composition, distribution and biomass of meiobenthos in the Oosterschelde estuary (SW Netherlands). Hydrobiologia 282/283, 197–217.CrossRefGoogle Scholar
Soetaert, K., Vincx, M., Wittoeck, J., Tulkens, M. and Van Gansbeke, D. (1994) Spatial patterns of Westerschelde meiobentos. Estuarine, Coastal and Shelf Science 39, 367–388.CrossRefGoogle Scholar
Soetaert, K., Vincx, M., Wittoeck, J. and Tulkens, M. (1995) Meiobenthic distribution and nematode community structure in five European estuaries. Hydrobiologia 311, 185–206.CrossRefGoogle Scholar
Somerfield, P.J. and Clarke, K.R. (1995) Taxonomic levels, in marine community studies revisited. Marine Ecology Progress Series 127, 113–119.CrossRefGoogle Scholar
Steyaert, M., Vanaberbeke, J., Vanreusel, A., Barranguet, C., Lucas, C. and Vincx, M. (2003) The importance of fine-scale, vertical profiles in characterizing nematode community structure. Estuarine, Coastal and Shelf Science 58, 353–366.CrossRefGoogle Scholar
Strickland, J.D.M. and Parsons, T.R. (1972) A practical handbook of seawater analysis. (Bulletin 167, second edition). Ottawa: Fisheries Research Board of Canada, 311 pp.Google Scholar
Teixeira, H., Salas, F., Borja, A., Neto, J.M. and Marques, J.C. (2008) A benthic perspective in assessing the ecological status of estuaries: the case of the Mondego estuary (Portugal). Ecological Indicators 8, 404–416.CrossRefGoogle Scholar
Udalov, A.A., Mokievskii, V.O. and Chertoprud, E.S. (2005) Influence of the salinity gradient on the distribution of meiobenthos in the Chernaya River Estuary (White Sea). Oceanology 45, 680–688.Google Scholar
Vincx, M. (1996) Meiofauna in marine and freshwater sediments. In Hall, G.S. (ed.) Methods for the examination of organismal diversity in soils and sediments. Wallinfort, UK: Cab International, pp. 187–195.Google Scholar
Vincx, M., Meire, P. and Heip, C.H. (1990) The distribution of the Nematoda communities in Southern Bight of the North Sea. Cahiers de Biologie Marine 31, 439–462.Google Scholar
Warwick, R.M. (1981) The nematode/copepod ratio and its use in pollution ecology. Marine Pollution Bulletin 12, 329–333.CrossRefGoogle Scholar
Warwick, R.W. (1988) The level of taxonomic discrimination required to detect pollution effects on marine benthic communities. Marine Pollution Bulletin 19, 259–268.CrossRefGoogle Scholar
Warwick, R.W. (1993) Environmental impact studies on marine communities: pragmatic considerations. Australian Journal of Ecology 18, 63–80.CrossRefGoogle Scholar
Yamamuro, M. (2000) Abundance and size distribution of sublittoral meiobenthos along estuarine salinity gradients. Journal of Marine Systems 26, 135–143.CrossRefGoogle Scholar