Long-term dynamics in nutrients, chlorophyll <em>a</em> and water quality parameters in the Lagoon of Venice

Francesco Acri; Federica Braga; Fabrizio Bernardi Aubry

doi:10.3989/scimar.05022.30A

Autores/as

Francesco Acri ISMAR – CNR https://orcid.org/0000-0002-5405-224X
Federica Braga ISMAR – CNR https://orcid.org/0000-0002-4131-9080
Fabrizio Bernardi Aubry ISMAR – CNR https://orcid.org/0000-0003-0417-8597

DOI:

https://doi.org/10.3989/scimar.05022.30A

Palabras clave:

nutrientes, biomasa fitoplanctónica, variación plurianual, calidad del agua, Laguna de Venecia

Resumen

Desde 1997, el CNR ISMAR ha recopilado datos mensuales de hidroquímica y fitoplancton en las zonas del norte y centro de la Laguna de Venecia. Desde el 2007 los datos hacen parte de la base de datos LTER (International Long-Term Ecosystem Research), ayudando a llenar la falta de datos en los estudios ambientales de la Laguna. Analizando nuestra serie histórica (1998-2017), pudimos observar un aumento de la temperatura del agua debido a las tendencias climáticas, una reducción del estado trófico debido principalmente al menor suministro de nutrientes inorgánicos de nitrógeno disuelto y un aumento de la transparencia y del oxígeno disuelto relacionado al aumento de la biomasa de macrófitas (macroalgas y fanerógamas). Por último, se observó una reducción de la biomasa del fitoplancton y al mismo tiempo un aumento de fanerógamas y macroalgas. Los actuales y futuros estudios ayudarán a evaluar las formas en el cual el ecosistema de la Laguna de Venecia responderá a las presiones antropogénicas y al cambio climático global.

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