title: Anthropogenic versus mineral aerosols in the stimulation of microbial planktonic communities in coastal waters of the northwestern Mediterranean Sea.
abstract: The atmosphere of the northwestern (NW) Mediterranean Sea is affected by continuous inputs of anthropogenic aerosols and episodic Saharan dust events. These atmospheric inputs deliver to the surface waters high amounts of macronutrients and trace metals that can constitute their main source at certain times of the year. The effect of both anthropogenic and crustal particles over the autotrophic and heterotrophic planktonic community assembles was evaluated through three microcosm experiments carried out in the summer of 2013 and in the winter and spring of 2014 at an urban coastal location of the NW Mediterranean (Barcelona, Spain). Particles were added to seawater at a concentration of 0.8mgl-1. The results showed that (i) a greater stimulation of the whole community was observed in summer and spring than in winter; (ii) both kinds of aerosols produced an increase in the growth of phytoplankton, although the stimulation of nanoeukaryotes was significantly larger with anthropogenic aerosols; and (iii) bacterial abundance increased more with mineral dust, whereas bacterial production was more stimulated with anthropogenic inputs. Overall, the effect of atmospheric particles was dependent on their composition and solubility in seawater, as well as on the initial biogeochemical conditions present in the seawater and had the potential to change the net metabolic balance of the microbial planktonic community.
authors.affiliation: Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta 37-49, E-08003 Barcelona, Spain. Electronic address: marin@icm.csic.es.
authors.forename: I
authors.initials: I
authors.lastname: Marín
authors.affiliation: Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta 37-49, E-08003 Barcelona, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Nunes
authors.affiliation: Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta 37-49, E-08003 Barcelona, Spain; UPMC Université Paris 06, UMR 7621, INSU-CNRS, Laboratoire d'Océnographie Microbienne, Observatoire Océanologique, F-66651 Banyuls/mer, France.
authors.forename: E D
authors.initials: ED
authors.lastname: Sánchez-Pérez
authors.affiliation: Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta 37-49, E-08003 Barcelona, Spain.
authors.forename: F L
authors.initials: FL
authors.lastname: Aparicio
authors.affiliation: Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta 37-49, E-08003 Barcelona, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Estrada
authors.affiliation: Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta 37-49, E-08003 Barcelona, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Marrasé
authors.affiliation: Instituto de Diagnóstico Ambiental y Estudios del Agua (CSIC), C/Jordi Girona, 18-26, E-08034 Barcelona, Spain.
authors.forename: T
authors.initials: T
authors.lastname: Moreno
authors.affiliation: Aix Marseille Université, CNRS/INSU, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 13288 Marseille Université du Sud Toulon-Var, CNRS/INSU, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 83957 La Garde, France.
authors.forename: T
authors.initials: T
authors.lastname: Wagener
authors.affiliation: Instituto de Diagnóstico Ambiental y Estudios del Agua (CSIC), C/Jordi Girona, 18-26, E-08034 Barcelona, Spain.
authors.forename: X
authors.initials: X
authors.lastname: Querol
authors.affiliation: Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta 37-49, E-08003 Barcelona, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Peters
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D001419:Bacteria / Q000254:growth & development*; D004391:Dust; D008522:Mediterranean Sea; D008903:Minerals / Q000032:analysis*; D010933:Plankton / Q000254:growth & development*; D012621:Seasons; D012623:Seawater / Q000032:analysis*; D013030:Spain; D014871:Water Microbiology
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D004391:Dust; D008903:Minerals
keywords: Anthropogenic aerosols; Bacteria; Chlorophyll; Copper; Mediterranean Sea; Saharan dust