Palabras clave
macrozoobenthos
environmental quality assessment
ecological status
Pantano Caroni
macrozoobentos
evaluación de calidad ambiental
estatus ecológico
Cómo citar
Resumen
Los estuarios tropicales de países en desarrollo han experimentado un aumento en los niveles de estrés debido a la presión humana. El sitio Ramsar pantano Caroni, el manglar más grande de la costa oeste de Trinidad, ha estado sujeto a altos niveles de impacto antropogénico, incluyendo alteraciones hidrológicas y contaminación de fuentes terrestres desde la década de 1920. Aunque la mayoría de estos impactos han sido bien documentados, existe información limitada sobre las comunidades macrobentónicas en el pantano. Este estudio aborda esta escasez de información. Se muestreó la fauna macrobentónica en el canal principal del pantano Caroni en 12 localidades utilizando una draga Van Veen de 0.025m2, una vez durante la época seca (Abril) y la época lluviosa (Agosto) del 2015, con un total de 144 muestras. Las muestras fueron ordenadas, contadas y las especies se identificaron al menor nivel taxonómico posible. Se identificaron un total de 55 taxa, siendo los poliquetos el taxa más abundante. El estatus ecológico del macrobentos se evaluó utilizando el Índice Marino Biótico de AZTI (AMBI) y el AMBI-multivariado (M-AMBI). Los parámetros fisicoquímicos se midieron con un multiparámetro YSI. Los análisis químicos también se realizaron en nitratos, nitritos, amonio y fostatos activos utilizando métodos estándar. En conjunto, el índice AMBI caracterizó el pantano Caroni como “levemente perturbado” con una comunidad macrobentónica de categoría “pobre” de acuerdo al M-AMBI. Generalmente, la calidad de los ambientes incrementa desde la época seca hasta la época lluviosa. Sin embargo, las variaciones estacionales en los índices AMBI y M-AMBI fueron específicas a la localidad, mostrando algunas un incremento en el estatus ecológico y calidad del macrozoobentos, mientras que otros mostraron una degradación de la época seca a la época lluviosa. Las estaciones al norte del pantano mostraron una mejora de la época seca a la época lluviosa, mientras que se presentó lo contrario en las estaciones más al sur. Una característica notable del pantano fueron los altos niveles de contaminantes, particularmente amonio, registrado en uno de los canales principales del río Caroni. Esto contrasta con los otros canales del pantano que experimentan niveles mucho menores de aporte de contaminantes de fuentes terrestres. La evaluación del pantano Caroní utilizando los índíces AMBI y M-AMBI puede ser una base útil de información para las estrategias de manejo y conservación del humedal y mejorar su calidad ambiental.Citas
Afli, A., Ayari, A., & Zaabi, S. (2008). Ecological quality of some Tunisian coast and lagoonlocations, by using benthic community parameters and biotic indices. Estuarine Coastal Shelf Science, 80, 269-280.
APHA, AWWA, WPCF. (1995). Standard Methods for the Examination of Water and Waste water, 19th ed. American Public Health Association, Washington, DC.
Bacon, P. (1970). The Ecology of Caroni Swamp. Special Publication. Trinidad and Tobago: Central Statistical Office.
Bigot, L., Gremare, A., Amouroux, J.-M., Frouin, P., Maire, O., & Gaertner, J. (2008). Assessment of the ecological quality status of soft-bottoms in Reunion Island (tropical Southwest Indian Ocean) using AZTI marine biotic indices. Marine Pollution Bulletin, 56, 704-722.
Borja, A., Dauer, D., Diaz, R., Llansó, R., Muxika, I., Rodriguez, J., & Schaffner, L. (2008). Assessing estuarine benthic quality conditions in Chesapeake Bay: A comparison of three indices. Ecological Indicators, 8, 395-403.
Borja, A., Franco, J., & Pérez, V. (2000). A marine biotic index to establish the eco-logical quality of soft-bottom benthos within European estuarine and coastal environments. Marine Pollution Bulletin, 40, 1100-1114.
Borja, A., Josefson, A., Miles, A., Muxika, I., Olsgard, F., Phillips, G., . . . Rygg, B. (2007). An approach to the intercalibration of benthic ecological status assessment in the North Atlantic ecoregion, according to the European Water Framework Directive. Marine Pollution Bulletin, 55, 42-52.
Borja, A., Muxika, I., & Franco, J. (2003). The application of a Marine Biotic Index to differ-ent impact sources affecting soft-bottom benthic communities along European coasts. Marine Pollution Bulletin, 46, 835-845.
Borja, A., & Tunberg, B. (2011). Assessing benthic health in stressed subtropical estuaries, eastern Florida, USA using AMBI and M-AMBI. Ecological Indicators, 11, 295-303.
Brinkhurst, R. (1971). A Guide for the Identification of British Aquatic Oligochaeta. Toronto: University of Toronto.
Brown, C. B., Hansell, J. R. F.., Hill, I. D., Stark, J., Smith, J. W. (1966) Land Capability Survey of Trinidad and Tobago # 1. Port-of-Spain, Trinidad.
Buchanan, J., & Kain, K. (1971). The Determination of Organic Matter in Sediments. In W. Holme, & A. McIntyre (Eds.), Methods for the Study of Marine Benthos (pp. 49-50). Oxford: Blackwell Scientific.
Central Statistical Office (CSO) of Trinidad and Tobago. (1995). Population and Housing Census 1990. Government of Trinidad and Tobago.
Cheung, S., Lam, N., Wu, R., & Shin, P. (2008). Spatio-temporal changesof marine macrobenthic community in sub-tropical waters upon recovery fromeutrophication. II. Life-history traits and feeding guilds of polychaete community. Marine Pollution Bulletin, 56, 297-307.
Clarke, K. R., & Gorley, R. N. (2006). PRIMER v6: user manual/tutorial (Plymouth routines in multivariate ecological research). Plymouth: Primer-E Ltd.
Cuffy, G. C. (1999). Seasonal use of a neotropical marsh by avifauna, Caroni, Trinidad. (M.Phil. Dissertation). Department of Life Sciences, University of the West Indies, St. Augustine, Trinidad
Deonarine, G. (1980). Studies on the Biomagnification of Some Chlorinated Hydrocarbons in a Neotropical Mangrove Swamp. (M.Phil. Dissertation). University of the West Indies, Trinidad.
Fauchald, K. (1977). The Polychaete Worms, Definitions and Keys to the Orders, Families and Genera, Los Angeles: Natural History Museum of Los Angeles County.
Feebarani, J., Joydas, T., Damodaran, R., & Borja, A. (2016). Benthic quality assessment in a naturally- and human-stressedtropical estuary. Ecological Indicators, 67, 380-390.
Grasshoff, K., Ehrhardt, M., & Kremling, K. (1983). Methods of Seawater Analysis, Germany: Verlag Chemie.
Henry, E. B. (1990). Climate variability and climate change- the role of small island states, for instance Trinidad and Tobago. Trinidad and Tobago Climate Document. Trinidad and Tobago: Meteorological Services.
Hyland, J., Balthis, L., Karakassis, I., Magni, P., Petrov, A., Shine, J., . . . Warwick, R. (2005). Organic carbon content of sediments as an indicator of stress in the marine benthos. Marine Ecology Progress Series, 295, 91-103.
Institute of Marine Affairs (IMA). (1999). Trinidad and Tobago Water Sector Institutional Strengthening Design and Implementation of the surface Water Quality Monitoring Programme for the Caroni River Basin. Draft Final Report-Surface Water Quality in the Caroni River Basin. Trinidad and Tobago: Water and Sewage Authority.
Institute of Marine Affairs (IMA). (2012). Water Quality Assessment at Williams Bay and Chagville Beach. Institute of Marine Affairs, Chaguaramas, Trinidad.
Intergovernmental Oceanographic Commission. (1982). The Determination of Petroleum Hydrocarbons in Sediments. Paris: UNESCO.
Juman, R., Bacon, P., & Gerald, L. (2002). Caroni Basin Case Study, Caribbean Basins, LOICZ (Land-Ocean Interaction in the Coastal Zone) Global Change Assessment and Synthesis of River Catchment/Island Coastal Sea Interaction and Human Dimensions, with a desktop study of Oceania Basins. LOICZ Reports and Studies, No.27. The Netherlands: LOICZ Texel.
Juman, R. A. & Hassanali, K. (2013). Mangrove Conservation in Trinidad and Tobago. In G. Gleason, & T. R. Victor, (Eds.), Mangrove Ecosystems: Biography, Genetic Diversity and Conservation strategies (pp. 35-64). New York: Nova Publisher
Kanhai, L., Gobin, J., Beckles, D., Lauckner, B., & Mohammed, A. (2013). Metals in sediments and mangrove oysters (Crassostrea rhizophorae) from the Caroni Swamp, Trinidad. Environmental Monitoring Assessment, 186, 1961-1976.
Kjerfve, B. (1981). Tides of the Caribbean. Journal of Geophysical Research, 86, 4243-4247.
Kjerfve, B., Perillo, G.M.E., Gardner, L., Rine, J., Dias, G., & Mochel, F. (2002). Morphodynamics of muddy environments along the Atlantic coasts of North and South America. In T. Healy, Y. Wang, & J.A. Healy (Eds.), Muddy Coasts of the World: Processes, Deposits and Functions (pp. 479-532). N.Y.: Elsevier.
Lee, S. (2008). Mangrove macrobenthos: assemblages, services and linkages. Journal of Sea Research, 59, 16-29.
Lotze, H. (2010). Historical reconstruction of human-induced changes in U.S. estuaries. Oceanography Marine Biology Annual Review, 48, 267-338.
Matsui, N., Meepol, W., & Chukwamdee, J. (2015). Soil Organic Carbon in Mangrove Ecosystems with Different Vegetation and Sedimentological Conditions. Journal of Marine Science and Engineering, 1404-1424.
Ministry of Environment of British Colombia. (1991). Guidelines for Interpreting Water Quality Data. Retrieved from https://www.for.gov.bc.ca/hts/risc/pubs/aquatic/interp/interp-01.htm
Muxika, I., Borja, Á., & Bald, J. (2007). Using historical data, expert judgement and multi-variate analysis in assessing reference conditions and benthic ecological status,according to the European Water Framework Directive. Marine Pollution Bulletin, 55, 16-29.
Nathai-Gyan, G. (2006). Restoration of the freshwater marsh ecosystem of the Caroni Swamp to improve foraging opportunity for the Scarlet Ibis (Eudocimus ruber). St. Augustine: University of the West Indies.
NOAA. (2016). Hypoxia . Retrieved from National Ocean Service : http://oceanservice.noaa.gov/hazards/hypoxia/
Oram, B. (2014). Water Research Centre. Retrieved from www.water-research.net: http://www.water-research.net/index.php/phosphates
Paz-Ríos, C. E., Simões, N., & Ardisson, P.L. (2013). Intertidal and shallow water amphipods (Amphipoda: Gammaridea). Nauplius, 21(2), 179-194.
Pearson, T., & Rosenberg, R. (1978). Macrobenthic succession in relation to organic enrichment and pollution of the marine environment. Oceanography and Marine Biology, 229-311.
Phelps, H. O., (1997). Caroni Swamp Rehabilitation Study- Hydrology and Engineering. Report to the Inter-American Development Bank.
Rabalais, N., Turner, R. E., Justic´, D., Dortch, Q., & Wiseman, W. J. (1999). Characterization of Hypoxia: Topic 1 Report for the Integrated Assessment on Hypoxia in the Gulf of Mexico. NOAA Coastal Ocean Program Decision Analysis Series No. 15. Maryland: NOAA Coastal Ocean Program, Silver spring.
Sigovini, M., Keppel, E., & Tagliapietra, D. (2013). M-AMBI revisited: looking inside awidely used benthic index. Hydrobiologia, 717, 41-50.
Siung-Chang, A., Norman, P., & Dalipsingh, R. (1987). Caroni River Study: Organic Pollution. Chaguaramas: Institute of Marine Affairs.
Spagnolo, A., Punzo, E., Santelli, A., Scarcella, G., Strafella, P., Grati, F., & Fabi, G. (2014). Offshore platforms: comparison of five benthic indicators for assessingthe macrozoobenthic stress levels. Marine Pollution Bulletin, 82, 55-65.
USEPA (1995). The EPA Quality Criteria for Water. Retrieved from the United States Environmental Protection Agency : https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table
Vaalgamaa, S., Sonninen, E., Korhola, A., & Weckstrom, K. (2013). Identifying recent sources of organic matter enrichment and eutrophication trends at coastal sites using stable nitrogen and carbon isotope ratios in sediment cores. Journal of Paleolimnology, 50, 191-206.
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