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Simulated terrestrial runoff triggered a phytoplankton succession and changed seston stoichiometry in coastal lagoon mesocosms
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
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2016 (English)In: Marine Environmental Research, ISSN 0141-1136, E-ISSN 1879-0291, Vol. 119, 40-50 p.Article in journal (Refereed) Published
Abstract [en]

Climate change scenarios predict intensified terrestrial storm runoff, providing coastal ecosystems with large nutrient pulses and increased turbidity, with unknown consequences for the phytoplankton community. We conducted a 12-day mesocosm experiment in the Mediterranean Thau Lagoon (France), adding soil (simulated runoff) and fish (different food webs) in a 2 x 2 full factorial design and monitored phytoplankton composition, shade adaptation and stoichiometry. Diatoms (Chaetoceros) increased fourfold immediately after soil addition, prymnesiophytes and dinoflagellates peaked after six- and 12 days, respectively. Soil induced no phytoplanlcton shade adaptation. Fish reduced the positive soil effect on dinoflagellates (Scripsiella, Glenodinium), and diatom abundance in general. Phytoplankton community composition drove seston stoichiometry. In conclusion, pulsed terrestrial runoff can cause rapid, low quality (high carbon: nutrient) diatom blooms. However, bloom duration may be short and reduced in magnitude by fish. Thus, climate change may shift shallow coastal ecosystems towards famine or feast dynamics.

Place, publisher, year, edition, pages
2016. Vol. 119, 40-50 p.
Keyword [en]
Community composition, Climate change, Diatoms, Mediterranean, Mesocosm, Phytoplankton, Soil, oichiometry, Thau lagoon
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:umu:diva-126630DOI: 10.1016/j.marenvres.2016.05.001ISI: 000381168000005PubMedID: 27209121OAI: oai:DiVA.org:umu-126630DiVA: diva2:1048722
Funder
EU, European Research Council, 228224
Available from: 2016-11-22 Created: 2016-10-12 Last updated: 2016-11-22Bibliographically approved

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Deininger, AnneFaithfull, Carolyn L.Liess, Antonia
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CiteExportLink to record
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Cite
Citation style
  • apa
  • ieee
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  • vancouver
  • Other style
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  • de-DE
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Output format
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