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Phytoplankton response to atmospheric aerosol deposition in a coastal zone of the NW Mediterranean

AutorNunes, Sdena ; Marín, Isabel ; Txurruka, Estibalitz; Marrasé, Cèlia ; Estrada, Marta ; Peters, Francesc ; Sanchez-Perez, Elvia D.
Fecha de publicación17-nov-2014
Citación2nd International Ocean Research Conference (2014)
ResumenAtmospheric deposition of nutrients and contaminants may have particularly important consequences in a low nutrient – low chlorophyll marine system such as the Mediterranean Sea, which is exposed to aerosols of both local Anthropogenic and Saharan origin. The effect of atmospheric deposition on coastal phytoplankton of the NW Mediterranean was investigated by means of a stimulation experiment in microcosms. We filled six 15 L containers with coastal seawater pre-filtered through 150 μm. The microcosms were incubated at 12.7 ºC under an 11:13 h light: dark cycle. On the second day, atmospheric dust from Saharan and Anthropogenic origin collected in Barcelona was added to four of the containers. Two of the microcosms (SI and SII) were amended with 0.8 mg L-1 of Saharan dust and the other two (AI and AII) received the same amount of Anthropogenic dust. The two remaining containers (KI and KII) were left as controls. The experiment lasted for seven days and subsamples were taken daily for chlorophyll a, flow cytometry and phytoplankton biomass determinations. Saharan and Anthropogenic dust additions slightly induced chlorophyll a increases and stimulated Synechococcus growth during the 24 h after dust addition. The stimulation of chlorophyll a was on average 56% larger in S than in A. We will discuss these dynamics in relation to nutrient concentrations and additions
Descripción2nd International Ocean Research Conference, One planet one ocean, 17-21 November 2014, Barcelona, Spain
Versión del editorhttp://www.iocunesco-oneplanetoneocean.fnob.org/
Aparece en las colecciones: (ICM) Comunicaciones congresos
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