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  • 1
    Publication Date: 2021-05-19
    Description: The anthropogenic affectation was evaluated on the coast N of the Gulf of Batabanó in May 2003 (corresponding to the provinces of Matanzas and Havana), in areas located in the line of the coast. The results were compared with the historical information of the sector. In the coast N and the Ensenada of the Broa, the parameters oxygen saturation, DBO5 and DQO showed characteristic high values of eutrofication. The biggest contribution in the Cianoficies was in the near coastal areas to sources of organic contamination. In the case of the nutrients they show specific data of mesothrofic waters with tendency to the eutrofization and the silts presented a high affectation for toxic metals. The area near to Guanímar is distinguished to present conditions of organic contamination that favor heterothrofic conditions, corroborated by a prevalence of the processes of mineralization of the organic matter over primary production and lows values of fitoplankton concentration. On the contrary, in the region of Surgidero of Batabanó, the processes of synthesis of organic matter prevail suggested by a high primary production, and concentration of fitoplankton, with low breathing levels and mineralization of the organic matter, that indicates that the system is behaving autothrofically. In a general way, this sector is very affected by the anthropogenic impact. The information obtained is of great importance for the development of the fishing and tourist industries in the area.
    Description: Published
    Keywords: Phytoplankton ; Water quality ; Primary production ; Chemistry ; Environmental monitoring ; Phytoplankton ; Water quality ; Primary production ; Chemistry ; Environmental monitoring
    Repository Name: AquaDocs
    Type: Proceedings Paper
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  • 2
    Publication Date: 2021-05-19
    Description: Entre los años 2001 y 2005, fueron evaluados los contenidos de oxígeno disuelto y de materia orgánica en la fase acuosa de las bahías de Cárdenas, Santa Clara, Puerto de Sagua la Grande, San Juan de los Remedios, Buena Vista, Los Perros, Jigüey y La Gloria. En el Puerto de Sagua la Grande y la zona costera de la bahía de Buena Vista se registraron concentraciones de oxígeno disuelto inferiores al valor de saturación en la época de lluvias. Predominaron los montos de materia orgánica expresados en términos de la demanda bioquímica de oxígeno (DBO5) entre 1,0 -2,0 mgO2/L, típicos de agua marina de calidad dudosa para uso pesquero, según la NC-25:99. Las concentraciones más comunes de la demanda química de oxígeno (DQO) al permanganto en medio alcalino fueron superiores a los 2,0 mgO2/L, indicando que existe una tendencia a la contaminación de las agua por materia orgánica. En las bahías de Santa Clara, Los Perros, Jigüey y La Gloria, la materia orgánica es fundamentalmente de origen autóctono. Las restantes bahías son receptoras de cantidades considerables de aguas residuales con escaso o ningún tratamiento, enriqueciendo a las mismas con materia orgánica.
    Description: Between 2001 and 2005, the dissolved oxygen and organic matter contents in the aquous phase were evaluated in the bays of Cárdenas, Santa Clara, Puerto de Sagua la Grande, San Juan de los Remedios, Buena Vista, Los Perros, Jigüey and La Gloria. In Puerto de Sagua la Grande and the coastal zone of Buena Vista Bay, dissolved oxygen concentrations lower than the saturation value were registered in the rainy season. There was a predominance of organic matter quantities expressed in terms of Biochemical Oxigen Demand (BOD5) between 1.0 -2,0 mgO2/L, typical of marine water of doubtful quality for fishing use, according to the NC-25:99. The most common concentrations of the Chemical Oxigen Demand (COD) to permanganate in alkaline medium were higher than 2.0 mgO2/L, indicating that there is a tendency to water pollution by organic matter. In Santa Clara, Los Perros, Jigüey and La Gloria bays, organic matter is fundamentally of autochthonous origin.The remaining bays receive considerable amounts of wastewaters with little or no treatment, that enrich these water bodies with organic matter.
    Description: Published
    Description: Oxígeno, materia orgánica, contaminación, aguas residuales,Oxygen, organic matter, wastewater pollution
    Keywords: Pollution ; Pollution
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
    Publication Date: 2021-05-19
    Description: Una de las causas que puede haber incidido de forma negativa en las poblaciones de langosta en el Golfo de Batabanó, son los cambios en la calidad ambiental del medio. Por tal motivo, se estudia el comportamiento de un conjunto de variables abióticas y bióticas y se compara con la información histórica existente que se remonta a la década de los años ’60. El estudio abarca dos matrices, aguas y sedimentos de fondo, en las especialidades de química, microbiología y fitoplancton. La salinidad mostró una baja variabilidad y valores elevados con una media de 38.64 ups, lo cual es de esperar teniendo en cuenta la gran sequía que sufrió el País durante muchos meses. El oxígeno disuelto mostró concentraciones normales para este tipo de ecosistema y valores por encima del por ciento de saturación. En el área evaluada predominaron los sedimentos en la mayoría de las fueron fondos fangosos con cierta cantidad de arena, de color blanco-gris, presentando en algunos casos olor a sulfhídrico.Teniendo en cuenta los indicadores, tanto químicos (DBO5, NT, PO4 y PT) como biológicos (bacterias heterótrofas y DMO en aguas y sedimentos, Pp, Pp/R y estructura de la comunidad fitoplanctónica), la zona al E de la Isla de la Juventud presentó, en general, mejores condiciones ambientales que la ubicada en las cercanías de La Coloma, aunque cada estación mostró sus particularidades en cuanto al comportamiento de cada uno de los parámetros evaluados.
    Description: One of the causes that have impacted in a negative way in lobster populations in the Gulf of Batabanó, are changes in environmental quality. For such a reason, it is studied the behaviour of a group of abiotic and biotic variables and were compared with the existent historical information since the decade of the years' 60. The study embraces the chemistry, microbiology and phytoplankton in two fundamental matrixes, waters and bottom sediments. The salinity showed a low variability and high values with a mean of 38.64 ups. The dissolved oxygen and the percent of saturation showed normal values. The sediments in most of the stations were muddy funds with certain quantity of sand of different diameter, of white-grey colour, presenting in some cases sulphidric odor. The application of specific chemical and biological indexes, show that the E area of the Juventud Island presented better environmental conditions that the proximities of La Coloma, although each station showed their particularities as for the behaviour of each one of the evaluated parameters.
    Description: Published
    Description: langosta espinosa, calidad ambiental, aguas, sedimentos, química, microbiología, fitoplancton, lobster, environmental quality, waters, bottom sediments, chemistry, microbiology, phytoplankton.
    Keywords: Water quality ; Water quality
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 4
    Publication Date: 2021-05-19
    Description: Entre los años 1990 y 1991 se estudió el Golfo de Guacanayabo, desde 1998 hasta 2003 se evaluó el Golfo de Batabanó y el Archipiélago Sabana Camagüey fue investigado en la etapa 2001-2005, con el objetivo de evaluar los contenidos de nitrógeno y fósforo en estas tres regiones de la plataforma marina cubana y establecer las relaciones existentes entre ambos nutrientes. Los golfos de Guacanayabo y Batabanó poseen un mayor potencial de nitrógeno y fósforo que el ecosistema costero Sabana-Camagüey, debido al menor desarrollo de la red fluvial en este ecosistema, aunque en las tres regiones las concentraciones de estos compuestos están bajo una acentuada influencia antropogénica. La relación nitrógeno total-fósforo total N.T./P.T., mostró una tendencia a decrecer en regiones con cobertura de pastos marinos, atribuido a las cantidades de fósforo que aportar los mismos a la matriz agua, aunque predominaron los valores en que ninguno de los nutrientes es restrictivo y a diferencia de la relación nitrógeno total inorgánico-fósforo inorgánico NTI/P no tiene un patrón bien definido en los diferentes períodos climáticos
    Description: The Gulf of Guacanayabo was studied in 1990 and 1991. The Gulf of Batabanó was evaluated from 1998 to 2003, and Sabana-Camagüey Archipelago was investigated in the stage 2001-2005. The objective of these researches was to evaluate nitrogen and phosphorus contents in these three regions of Cuban marine shelf and to establish the relations existing between both nutrients. The gulfs of Guacanayabo and Batabanó have a greater nitrogen and phosphorus potential than Sabana-Camagüey coastal ecosystem, due to the lesser development of the fluvial network in this ecosystem; although in the three regions the concentrations of these compounds receive a marked anthropogenic influence. The total nitrogen-total phosphorus ratio, N.T./P.T., showed a tendency to decrease in regions with seagrass cover, attributed to the amounts of phosphorus that this biotope contributes to the water matrix, although the predominant values were those in which none of the nutrients is restrictive, and unlike the total inorganic nitrogen-inorganic phosphorus ratio, NTI/P, it does not have a well-defined pattern in the different climatic periods.
    Description: Published
    Description: nitrógeno, fósforo, eutroficación, nitrogen, phosphorus, eutrophication
    Keywords: Eutrophication ; Nitrogen ; Phosphorus ; Eutrophication ; Nitrogen ; Phosphorus ; Man-induced effects ; Archipelagoes
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 5
    Publication Date: 2021-05-19
    Description: Se realizaron cinco muestreos entre enero de 2007 y junio de 2008 a la zona costera del municipio Playa, con el fin de evaluar los contenidos de los compuestos del ciclo del carbono. Los parámetros estudiados en la matriz agua fueron carbón orgánico, pH, alcalinidad total, alcalinidad al carbonato, dióxido de carbono total, dióxido de carbono libre, presión parcial de CO2, y contenidos de bicarbonato y carbonato. Los compuestos de carbono orgánico e inorgánico tuvieron una distribución muy heterogénea, los valores de pH (8,24±0,22) y alcalinidad total (2523±119 μmol/kg) indican que el área tiene un comportamiento alcalino, estos montos fueron similares a los encontrados en aguas de la plataforma marina cubanos y superiores a los consignados para el ambiente oceánico. El bicarbonato constituye el 77 % del carbono inorgánico total.
    Description: Five samplings were carried out between January 2007 and June 2008 in the coastal zone of Playa Municipality, with the purpose of evaluating the contents of carbon cycle compounds. The studied water matrix parameters were organic carbon, pH, total alkalinity, carbonate alkalinity, total carbon dioxide, free carbon dioxide, partial CO2 pressure, and bicarbonate and carbonate contents. Organic and inorganic carbon compounds presented a very heterogeneous distribution; pH values (8,24±0,22) and total alkalinity (2523±119 μmol/kg) indicate that the area has an alkaline behavior. These values were similar to those found in waters of the Cuban marine shelf, and higher than those registered for the oceanic environment. Bicarbonate ions constitute 77% of the total inorganic carbon.
    Description: Published
    Description: Cambio climático, Climate Change
    Keywords: Carbon dioxide ; Alkalinity ; Carbon cycle ; Carbon dioxide ; Alkalinity ; Carbon cycle
    Repository Name: AquaDocs
    Type: Journal Contribution
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