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  • Artikel  (4)
  • Chemistry  (1)
  • Coastal zone management  (1)
  • Meiofauna  (1)
  • Nitrogen  (1)
  • United States
  • CONyMA  (4)
  • 2005-2009  (4)
  • 2008  (4)
  • 1
    Publikationsdatum: 2021-05-19
    Beschreibung: Coral reefs are very sensitive to the increment in nitrogen concentrations and phosphorus, since these compounds propitiate the macroalgae growth, resulting in the degradation of coral reefs. With the purpose of assessing the degree of nutriphication of the coral reefs in Los Canarreos Archipelago, located in the periphery of the Gulf of Batabanó, and those located in the outer area of Sabana-Camagüey Archipelago (SCA), three samplings were executed in the reefs of Los Canarreos Archipelago (August 1999, March 2000 and August 2000). In SCA, samplings were done in May 2002 and August 2003. The parameters evaluated were nitrates + nitrite, ammonium, total nitrogen, inorganic phosphorus and total phosphorus. The nutrient contents in the reefs located in the outer border of the Gulf of Batabanó are much higher than those in the Sabana-Camagüey Archipelago, and to the threshold established by Lapointe et al (1992) for inorganic nitrogen (〉1,0 μM/L) and inorganic phosphorus (〉0,1 μM/L), so that the eutrophication processes are developed in coral reef ecosystems. The causes for the higher content of these compounds in the reefs of Los Canarreos Archipelago are related to a high anthropic activity in the Gulf of Batabanó, and also a possibly higher exchange rate of biogenic compounds between the gulf and the adjacent sea than among the different water bodies that conform the SCA and the ocean.
    Beschreibung: Published
    Schlagwort(e): Coral reefs ; Eutrophication ; Nitrogen ; Phosphorus ; Coral reefs ; Eutrophication ; Nutrients (mineral) ; Nitrogen ; Phosphorus
    Repository-Name: AquaDocs
    Materialart: Proceedings Paper
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2021-05-19
    Beschreibung: El Sistema de Humedales Costeros de la Comuna de Coquimbo configura una zona clave para la Costa Pacífico Sudamericana, albergando zonas húmedas de singular biodiversidad que cumplen una importante función como lugar de descanso y alimentación para numerosas especies, siendo destacadas como áreas de invernada de aves migratorias neotropicales. La importancia individual de los humedales de esta zona de Chile, y de su recurso hídrico asociado, se incrementa si se considera que son parte de una cadena de sitios en una zona semi árida fuertemente desertificada.
    Beschreibung: Published
    Schlagwort(e): Wetlands ; Wetlands ; Coastal zone management
    Repository-Name: AquaDocs
    Materialart: Proceedings Paper
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2021-05-19
    Beschreibung: 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.
    Beschreibung: Published
    Schlagwort(e): Phytoplankton ; Water quality ; Primary production ; Chemistry ; Environmental monitoring ; Phytoplankton ; Water quality ; Primary production ; Chemistry ; Environmental monitoring
    Repository-Name: AquaDocs
    Materialart: Proceedings Paper
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 2021-05-19
    Beschreibung: The structure of meiofaunal communities was surveyed in 17 stations in Nipe Bay, Cuba in July, 2001. Levels of Nickel (all stations) are higher than in several bays in Cuba, probably due to natural causes. The levels of Copper, Zinc, Fe and Manganese indicate a relative low pollution, likely related to the presence of urban settlements. There is decrease in the total density and number of taxa of meiofauna in the stations with higher levels of metals; the copepods appear to be particularly sensitivity to metal pollution. The stations located at the mouth of the bay have the lowest levels of contamination and the highest total density of organisms and taxa richness, probably due to a more intense turnover of the waters in this area and consequent lower accumulation of pollutants in the sediments. The more inner stations exhibit higher levels of contamination and possess community structures characterized by low richness of taxa and reduced density of meiofauna.
    Beschreibung: Published
    Schlagwort(e): Heavy metals ; Meiobenthos ; Heavy metals ; Meiofauna ; Meiobenthos
    Repository-Name: AquaDocs
    Materialart: Proceedings Paper , Non-Refereed
    Standort Signatur Erwartet Verfügbarkeit
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