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Increased anthropogenic aerosol emissions might disrupt marine microbial plankton communities

AutorMarín, Isabel ; Nunes, Sdena ; Sanchez-Perez, Elvia D. ; Txurruka, Estibalitz; Marrasé, Cèlia ; Estrada, Marta ; Peters, Francesc
Fecha de publicación17-nov-2014
Citación2nd International Ocean Research Conference (2014)
ResumenThe effect of dust deposition of crustal origin over low-nutrient low-chlorophyll regions as the Mediterranean Sea has been the object of study during last decades. Our oceans are also exposed to atmospheric inputs of anthropogenic origin. We evaluated the effect of both crustal and anthropogenic aerosols through two microcosm experiments carried out during winter and spring of 2014 in the NW Mediterranean coast. We incubated six containers at the temperature and light cycle of the corresponding time of the year. Two of the containers were amended with 0.8 mg L-1 of Saharan dust (S) and two with 0.8 mg L-1 of aerosols of anthropogenic origin (A). The remaining two microcosms were left unamended and served as control (K). In the winter experiment, a slight increase in chlorophyll a concentration in A and S containers was observed with respect to the control, but the growth was soon phosphorous limited. On the other hand, while only a moderate increase in chlorophyll a was observed in S containers during the spring experiment, a larger increase was evident in A containers, owing mainly to an increase in nitrogen concentration. Changes in the relative abundance of pico and nanoeukaryotes and bacteria communities were also observed during both experiments. Thus, aerosols of anthropogenic origin may have a drastically different effect on marine ecosystems than naturally occurring aerosols, especially under certain environmental conditions or times of the year
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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