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Bacterioplankton responses to riverine and atmospheric inputs in a coastal upwelling system (Ria de Vigo, NW Spain)
Univ Vigo, Spain.
Univ Vigo, Spain.
Univ Vigo, Spain.
Univ Vigo, Spain.
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2016 (English)In: Marine Ecology Progress Series, ISSN 0171-8630, E-ISSN 1616-1599, Vol. 542, 39-50 p.Article in journal (Refereed) Published
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Text
Abstract [en]

Anthropogenic pressures are changing the magnitude and nature of matter inputs into the ocean. The Ria de Vigo (NW Spain) is a highly productive and dynamic coastal system that is likely affected by such alterations. Previous nutrient-addition microcosm experiments conducted during contrasting hydrographic conditions suggested that heterotrophic bacteria are limited by organic carbon (C) and occasionally co-limited by inorganic nutrients in this coastal area. In order to assess short-term responses in biomass, production, and respiration of heterotrophic bacteria from the Ria de Vigo to increasing amounts of natural inputs of matter, we conducted 6 microcosm experiments, wherein surface seawater collected in spring, summer, and autumn was mixed with increasing amounts of dissolved natural matter concentrates from riverine and atmospheric origin. Simultaneous experiments with controlled inorganic and/or organic additions indicated that bacteria were co-limited by inorganic nutrients and C in spring and summer and primarily limited by C in autumn. Production responded more than biomass to increasing inputs of matter, whereas respiration did not change. The bacterial production response to increasing dissolved organic C load associated with riverine and atmospheric inputs was strongly related to the relative phosphorus (P) content of the dissolved matter concentrates. Our data suggest that bacterial production might decrease with the increase of P-deficient allochthonous matter inputs, which would have important biogeochemical consequences for C cycling in coastal areas.

Place, publisher, year, edition, pages
2016. Vol. 542, 39-50 p.
Keyword [en]
Bacterioplankton, Production, Biomass, Riverine water, Atmospheric deposition, Spain, Galicia, Ria de Vigo
National Category
Ecology
Research subject
Ecology, Aquatic Ecology
Identifiers
URN: urn:nbn:se:lnu:diva-50796DOI: 10.3354/meps11565ISI: 000368922900004OAI: oai:DiVA.org:lnu-50796DiVA: diva2:912894
Available from: 2016-03-18 Created: 2016-03-16 Last updated: 2017-04-18Bibliographically approved

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Martínez-García, Sandra
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Department of Biology and Environmental Science
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf