Volume 8, Issue 5, October 2019, Page: 63-76
Pollution Status of Incomati River Estuary Based on Meiofauna Analyses (Free-living Nematodes) in Maputo, Mozambique
Soko Mthobisi Innocent, Inkomati-Usuthu Catchment Management Agency, Mbombela, South Africa
Gyedu-Ababio Thomas, Inkomati-Usuthu Catchment Management Agency, Mbombela, South Africa
Received: Sep. 23, 2019;       Accepted: Oct. 16, 2019;       Published: Oct. 23, 2019
DOI: 10.11648/j.wros.20190805.12      View  340      Downloads  118
The Incomati Estuary, is located at Latitudes 25.430 S and 25.530 S and Longitudes 32.410 E and 32.44° E and discharges in the northern part of Maputo Bay. Four sites E1 (Oligohaline Zone), E2 (Euhaline Zone), E3 (Mesohaline zone), and E4 (Polyhaline Zone) were selected following the salinity gradient of the Incomati River Estuary. Sediments samples were collected in these sites for both the analyses of meiofauna communities especially free-living nematodes and environmental variables such as Heavy Metal, Chlorophyll-a, Nitrates and Total phosphorus. Multivariate statistical analyses were used to analyses the data, and nematodes were identified into genus level. Higher concentration of Heavy Metals such as Cadmium, Cobalt, Chromium, Copper, Iron, Manganese, Nickel, Vanadium, Zinc, and Aluminium were found at site E2. Nematodes such as Terschellingia and Theristus were found to be suitable indicators in identifying pollution. The Maturity Index further indicated that sites E2 followed by E1 were the polluted sites in the estuary. Further studies confirming the findings of this study must be done in the Incomati River Estuary, and other studies must be done in the African Coast in order to understand free-living nematodes and close the gap in our monitoring strategies.
Nematodes, Pollution, Sediments, Chlorophyll-a, Metals, Nitrates
To cite this article
Soko Mthobisi Innocent, Gyedu-Ababio Thomas, Pollution Status of Incomati River Estuary Based on Meiofauna Analyses (Free-living Nematodes) in Maputo, Mozambique, Journal of Water Resources and Ocean Science. Vol. 8, No. 5, 2019, pp. 63-76. doi: 10.11648/j.wros.20190805.12
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Kennish, M. J. 2002. Environmental threats and environmental futures of estuaries. Environmental Conservation. 29: 78-107.
Dolbeth, M., Pardal, M. A., Lillebø, A. I., Azeiteiro, U. M. & Marques, J. C. 2003. Short and long-term effects of eutrophication on the secondary production of an intertidal macrobenthic community. Marine Biology. 143: 1229-1238.
Paerl, W. H. 2006. Assessing and managing nutrient-enhanced eutrophication in estuarine and coastal waters: Interactive effects of human and climatic perturbations. Ecological Engineering. 26: 40-54.
Lillebø, A. I., Neto, J. M., Martins, I., Verdelhos, T., Leston, S., Cardoso, P. G., Ferreira, S. M., Marques, J. C. & Pardal, M. A. 2005. Management of a shallow temperate estuary to control eutrophication: the effect of hydrodynamics on the system’s nutrient loading. Estuarine, Coastal and Shelf Science. 65: 697-707.
Sengo, D. J. 2003. Effects of water management in Incomati River Basin into estuarine system: a downstream perspective of socio-economic demands from the estuarine services. MSc Thesis Water Management. UNESCO-IHE, Delft.
Kennedy, A. D. & Jacoby, C. A. 1999. Biological indicators of marine environmental health: meiofauna e a neglected benthic component? Environmental Monitoring Assessment. 54: 47-68.
Schratzberger, M., Gee, J. M., Rees, H. L., Boyd, S. E. & Wall, C. M. 2000. The structure and taxonomic composition of sublittoral meiofauna assemblages as an indicator of the status of marine environments. Journal of the Marine Biology Association of the United Kingdom. 80: 969-980.
Schratzberger, M. 2012. On the relevance of meiobenthic research for policymakers. Marine Pollution Bulleting. 64: 2639-2644.
Alves, A. S., Adãob, H., Ferrero, T. J., Marques, J. C., Costad, M. J. & Patrício, J. 2013. Benthic meiofauna as indicator of ecological changes in estuarine ecosystems: The use of nematodes in ecological quality assessment. Ecological Indicators. 24: 462-475.
Vanaverbeke, J., Gheskiere, T. & Vincx, M. 2000. The meiobenthos of Subtidal Sandbanks on the Belgian Continental Shelf. Estuarine, Coastal and Shelf Science. 51: 637-649.
Yeates, G. W., Percival, H. J. & Parshotam, A. 2003. Soil nematode responses to year-to-year variation of low levels of heavy metals. Australian Journal of Soil Research. 41: 613-625.
McLachlan, A. & Brown, A. C. 2006. The ecology of sandy shores. 2nd Ed. Amsterdam: Elsevier Science.
Zhang, X. K., Li, Q., Wang, S. B., Jiang, Y. & Liang, W. 2006. Effect of zinc addition to soil on nematode community structure. Bulletin of Environmental Contaminants and Toxicology. 76: 589-594.
Mirto, S., La Rosa, T., Gambi, C., Danovaro, R. & Mazzola, A. 2002. Nematode community response to fish-farm impact in the western Mediterranean. Environmental Pollution. 116: 203-214.
Fraschetti, S., Gambi, C., Giangrande, A., Musco, L. & Terlizzi, A. 2006. Structural and functional response of meiofauna rocky assemblages to sewage pollution. Marine Pollution Bulletin. 52: 540-548.
Moreno, M., Albertelli, G. & Fabiano, M. 2009. Nematode response to metal, PAHs and organic enrichment in tourist marinas of the Mediterranean Sea. Marine Pollution Bulletin. 58: 1192-1201.
Vezzulli, L., Moreno, M., Marin, V., Pezzati, E. & Bartoli, M. 2008. Organic waste impact of capture-based Atlantic bluefin tuna aquaculture at an exposed site in the Mediterranean Sea. Estuarine, Coastal and Shelf Science. 78: 369-384.
Gyedu-Ababio, T. K. & Baird, D. 2006. Response of meiofauna and nematode communities to increased levels of contaminants in a laboratory microcosm experiment. Ecotoxicology & Environmental Safety. 63: 443-450.
Heip, C., Vincx, M. & Vranken, G. 1985. The ecology of marine nematodes. Oceanography and Marine. 23: 399-489.
Moens, T., Bouillon, S. & Gallucci, F. 2005. Dual stable isotope abundances unravel trophic position of estuarine nematodes. Journal of Marine Biology Association of the United Kingdom. 85: 1401-1407.
Austen, M. C. & Widdicombe, S. 2006. Comparison of the response of meiobenthos and macrobenthos to disturbance and organic enrichment. Journal of Experimental Marine Biology and Ecology. 330: 96-104.
Heip, C., Basford, D., Craeymeersch, J. A., Dewarumez, J. M., Dorjes, J., de Wilde, P., Duineveld, G., Eleftheriou, A., Herman, P. M. J., Niermann, U., Kingston, P., Kunitzer, A., Rachor, E., Rumohr, H., Soetaert, K. & Soltwedel, T. 1992. Trends in biomass, density and diversity of North Sea macrofauna. ICES Journal of Marine Science. 49: 13-22.
Zhang, Z. N., Zhou, H., Yu, Z. S. & Han, J. 2001. Abundance and biomass of the benthic meiofauna in the northern soft-bottom of the Jiaozhou Bay. Oceanologia of Limnologia Sinica. 32: 139-147.
Guo, Y. Q., Zhang, Z. N. & Mu, F. H. 2002. Large-Scale Patterns of meiofaunal abundance in the Bohai Sea. Acta Ecologica Sinica. 22: 1463-1469.
Liu, X. S., Zhang, Z. N. & Huang, Y. 2005. Abundance and biomass of meiobenthos in the spawning ground of anchovy in the southern Huanghai Sea, China. Acta Oceanologica Sinica. 24: 94-104.
Liu, X., Zhang, Z. & Huang, Y. 2007: Sublittoral meiofauna with particular reference to nematodes in the southern Yellow Sea, China. Estuarine, Coastal and Shelf Science. 71: 616-628.
Zhang, Z. N. & Zhou, H. 2004. Some progress on the study of meiofauna. Periodical of Ocean University of China. 34: 799-806.
Hua, E., Zhang, Z. N. & Zhang, Y. 2006. Meiofauna distributions at the oxygen minimum zone in Changjiang River Estuary waters. Acta Oceanologica Sinica. 25: 120-134.
McLachlan, A. D. 1977. Analysis of Periodic Patterns in Amino Acid Sequences: Collagen. Biopolymers. 16: 1271-1297.
Furstenberg, J. P. & Vincx, M. 1988. Three new species of Chromadoropsis species (Nematoda, Desmodoridae) from Southern Africa and the North Sea. South African Journal of Zoology. 23: 215–223.
Gyedu-Ababio, T. K., Furstenberg, J. P., Baird, D. & Vanreusel, A. 1999. Nematodes as indicators of pollution: a case study from the Swartkops River System, South Africa. Hydrobiologia. 397: 155-169.
Gyedu-Ababio, T. K. 2011. Pollution status of two river estuaries in the Eastern Cape, South Africa, Based on Benthic Meiofauna Analyses. Journal of Water Resource and Protection. 3: 473-486.
Tietjen, J. H. 1980. Microbial-meiofaunal interrelationships: a review. Microbiology. 335-338.
Bongers, T., Alkemade, R. & Yeates, G. W. 1991. Interpretation of disturbance-induced maturity decrease in marine nematode assemblages by means of Maturity Index. Marine Ecological Progress Series. 76: 135-142.
Essink, K. & Keidel, H. 1998. Changes in estuarine nematode communities following a decrease of organic pollution. Aquatic Ecology. 32: 195-202.
Moreno, M., Ferrero, T. J., Gallizia, I., Vezzulli, L., Albertelli, G. & Fabiano, M. 2008. An assessment of the spatial heterogeneity of environmental disturbance within an enclosed harbour through the analysis of meiofauna and nematode assemblages. Estuarine, Coastal and Shelf Science. 77: 565-576.
Semprucci, F., Moreno, M., Sbrocca, S., Rocchi, M., Albertelli, G. & Balsamo, M. 2013. The nematode assemblage as a tool for the assessment of marine ecological quality status: a case-study in the Central Adriatic Sea. Marine Science. 14: 48-57.
Ürkmez, D., Sezgin, M. & Bat, L. 2014. Use of nematode maturity index for the determination of ecological quality status: a case study from the Black Sea. Journal of Black Sea/Mediterranean Environment. 20: 96˗107.
Sengo, D., Kachaphila, A., van de Zaag, P., Mul, M. & Nkomo, S. 2005. Valuing environmental water pulses into the Incomati estuary: Key to achieving equitable and sustainable utilization of transboundary waters.
Hoguane, A. M. 2002. Salt intrusion in Incomati river. Proceedings of the II-national conference on integrated coastal zone management. Proceedings of the II national conference on Coastal Zone Research. Maputo, 27–29 September 2000. CDS-ZC/MICOA, SECAM/UEM, 127 p.
Parker, J. G. 1983. A comparison of methods used for the measurement of organic matter in sediments. Chemistry and Ecology. 1: 201-210.
Lorenzen, C. & Jeffrey, J. 1980. Determination of chlorophyll in seawater. UNESCO Technical Papers in Marine Sciences. 35: 1-20.
Bate, G. C. & Heelas, B. V. 1975. Studies on the nitrate nutrition of two indigenous Rhodesian grasses. Journal of applied Ecology. 12: 941–952.
Olsen, S. R. & Dean, L. A. 1965. Phosphorus. In: Black, C. A (eds). Methods of Soil Analysis, American Society of Agronomy, Madison, USA. pp 1035-1058.
Anderson, R. O. 1959. A modified flotation technique for sorting bottom fauna samples. Limnology and Oceanography. 4: 223-225.
Heip, C., Smol, N. & Hautekiet, W. 1974. A rapid method of extracting meiobenthic nematodes and copepods from mud and detritus. Marine Biology. 23: 399-489.
Esteves, A. M. & Da Silva, V. M. A. P. 1998. The behaviour of sugar flotation technique in meiofauna extraction from different sand types. Tropical Ecology. 39: 283-284.
Giere, O. 1993. Meiobenthology: The microscopic fauna in aquatic sediments. New York: Springer-Verlag.
Warwick, R. M., Platt, H. M. & Somerfield, P. J. 1998. Free-living marine nematodes. Part III. British Monhysterida. Synopses of the British Fauna (New Series). Vol 53. Field Studies Council, Shrewsbury, UK. 296 pp.
Wieser, W. 1953. The relationship between oral cavity shape, nutrition meadow and 1000 occurrences in free-living marine nematodes. Archive for Zoology. 4: 439-484.
Legendre, P. & Anderson, M. J. 1999. Distance-based redundancy analysis: testing multispecies responses in multifactorial ecological experiments. Ecol. Monography. 69: 1–24.
McArdle, B. H. & Anderson, M. J. 2001. Fitting multivariate models to community data: A comment on distance-based redundancy analysis. Ecology. 82: 290-29.
Burnham, K. P. & Anderson, D. R. 2004. Multimodel inference: understanding AIC and BIC in model selection. Society of Method Res. 33: 261-304.
Clarke, K. R. & Gorley, R. N. 2006. PRIMER v6: User Manual Tutorial. PRIMER-E Ltd. United Kingdom: Plymouth.
Garcia-Montelongo, F., Díaz, C., Galindo, L., Larrechi, M. S. & Rius, X. 1994. Heavy metals in three fish species from the coastal waters of Santa Cruz de Tenerife (Canary Islands). Scientia Marina. 58: 179-83.
Jordão. C. P., de G Pereira, M. & Pereira, J. L. 2002. Metal Contamination of River Waters and Sediments from Effluents of Kaolin Processing in Brazil. Water, Air and Soil pollution. 140: 119-138.
Cox, M. E. & Preda, M. 2005. Trace Metal Distribution Within Marine and Estuarine Sediments of Western Moreton Bay, Queensland, Australia: Relation to Land Use and Setting. Geographical Research. 43: 173-193.
Soetaert, K., Vincx, M., Wittoeck, J., Tulkens, M. & Van Gansbeke, D. 1994. Spatial patterns of Westerschelde meiobenthos. Estuarine, Coastal and Shelf Science. 39: 367-388.
Udalov, A. A., Mokievskii, V. O. & Chertoprud, E. S. 2005. Influence of the salinity gradient on the distribution of meiobenthos in the Chernaya river estuary. Oceanology. 45: 680-688.
Renaud-Debyser, R. J. & Salvat, B. 1963. Eléments de prospérité des biotopes des sédiments meubles intertidaux et écologie de leurs populations en microfauna et macrofauna. Vie et Milieu. 14: 463-550.
Gray, J. S. & Rieger, R. 1971. A quantitative study of the meiofauna of an exposed sandy beach, at Robin Hoods Bay, Yorkshire. Journal of the Marine Biology Association of the United Kingdom. 51: 1-19.
Patrício, J., Neto, J. M., Teixeira, H., Salas, F. & Marques, J. C. 2009. The robustness of ecological indicators to detect long-term changes in the macrobenthos of estuarine systems. Marine Environmental Research. 68: 25-36.
Chinnadurai, G. & Fernando, O. J. 2007. Meiofauna of mangroves of the southeast coast of India with special reference to the free-living marine nematode assemblage. Estuarine Coastal and Shelf Science. 72: 329-336.
Shabdin, M. L. & Othman, B. H. R. 2008. Horizontal distribution of intertidal nematode from Sabah, Malaysia. Journal of Tropical Biology and Conservation. 4: 39-53.
Lampadariou, N., Austen, M. C., Robertson, N. & Vlachonis, G. 1997. Analysis of meiobenthic community structure in relation to pollution and disturbance in Iraklion Harbour, Greece. Vie Milieu. 47: 9-24.
Liu, X., Xu, M., Hua, E. & Zhang, Z. 2016. Biodiversity of free-living nematodes in the southern Yellow Sea, China. Journal of Ocean University of China. 15: 1-10.
Wieser, W. 1960. Benthic studies in Buzzards Bay. Part II. The Meiofauna. Limnology and Oceanography. 5: 121-137.
Tietjen, J. H. 1977. Population distribution and structure of the free-living nematodes of Long Island Sound. Marine Biology. 43: 123-136.
Ward, A. R. 1975. Studies on the sublittoral free-living nematodes of Liverpool Bay. Part II: Influence of sediment composition on the distribution of marine nematodes. Marine Biology. 30: 217-225.
De Beer, J. D., Dryer, J. & Loubser, C. 2005. Environmental issues and risks. In: Loubser, C. P. ed. Environmental Education, Some South African Perspectives. Pretoria: Van Schaik Publishers.
Vanaverbeke, J., Merckx, B., Degraer, S. & Vincx, M. 2011. Sediment-related distribution patterns of nematodes and macrofauna: two sides of the benthic coin? Marine Environmental Research. 71: 31-40.
Fonseca, V. G., Carvallo, G. R., Quince, C., Johnson, H. F., Neill, S. P., Lambshead, J. D., Thomas, W. K., Power, D. M. & Creer, S. 2014. Metagenetic analysis of patterns of distribution and diversity of marine meiobenthic eukaryotes. Global Ecology and Biogeography. 23: 1293-1302.
Moreno, M., Semprucci, F., Vezzulli, L., Balsamo, M., Fabiano, M. & Albertelli, G. 2001. The use of nematodes in assessing ecological quality status in the Mediterranean coastal ecosystems. Ecological Indicator. 11: 328-336.
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