Umeå University's logo

umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
Microbial food web changes induced by terrestrial organic matter and elevated temperature in the coastal northern Baltic Sea
Umeå University, Faculty of Science and Technology, Umeå Marine Sciences Centre (UMF). Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (EcoChange; UMFpub)ORCID iD: 0000-0001-7819-9038
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Marine Research Institute, Klaipėda University, Klaipėda, Lithuania.
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. Umeå University, Faculty of Science and Technology, Umeå Marine Sciences Centre (UMF).ORCID iD: 0000-0002-1298-3839
Show others and affiliations
2023 (English)In: Frontiers in Marine Science, E-ISSN 2296-7745, Vol. 10, article id 1170054Article in journal (Refereed) Published
Abstract [en]

Climate change has been projected to cause increased temperature and amplified inflows of terrestrial organic matter to coastal areas in northern Europe. Consequently, changes at the base of the food web favoring heterotrophic bacteria over phytoplankton are expected, affecting the food web structure. We tested this hypothesis using an outdoor shallow mesocosm system in the northern Baltic Sea in early summer, where the effects of increased temperature (+ 3°C) and terrestrial matter inputs were studied following the system dynamics and conducting grazing experiments. Juvenile perch constituted the highest trophic level in the system, which exerted strong predation on the zooplankton community. Perch subsequently released the microbial food web from heavy grazing by mesozooplankton. Addition of terrestrial matter had a stronger effect on the microbial food web than the temperature increase, because terrestrial organic matter and accompanying nutrients promoted both heterotrophic bacterial production and phytoplankton primary production. Moreover, due to the shallow water column in the experiment, terrestrial matter addition did not reduce the light below the photosynthesis saturation level, and in these conditions, the net-autotrophy was strengthened by terrestrial matter enrichment. In combination with elevated temperature, the terrestrial matter addition effects were intensified, further shifting the size distribution of the microbial food web base from picoplankton to microphytoplankton. These changes up the food web led to increase in the biomass and proportion of large-sized ciliates (>60 µm) and rotifers. Despite the shifts in the microbial food web size structure, grazing experiments suggested that the pathway from picoplankton to nano- and microzooplankton constituted the major energy flow in all treatments. The study implies that the microbial food web compartments in shallow coastal waters will adjust to climate induced increased inputs of terrestrial matter and elevated temperature, and that the major energy path will flow from picoplankton to large-sized ciliates during the summer period.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2023. Vol. 10, article id 1170054
Keywords [en]
mesocosm experiment, climate change, microbial food web, Baltic Sea, terrestrial matter effects, temperature effect
National Category
Ecology
Identifiers
URN: urn:nbn:se:umu:diva-212872DOI: 10.3389/fmars.2023.1170054Scopus ID: 2-s2.0-85167351094OAI: oai:DiVA.org:umu-212872DiVA, id: diva2:1787609
Funder
Swedish Institute, 00140/2014Swedish Research Council Formas, 2019/0007Ecosystem dynamics in the Baltic Sea in a changing climate perspective - ECOCHANGEAvailable from: 2023-08-14 Created: 2023-08-14 Last updated: 2023-08-18Bibliographically approved

Open Access in DiVA

fulltext(1042 kB)77 downloads
File information
File name FULLTEXT01.pdfFile size 1042 kBChecksum SHA-512
4edf645e61d10397f0ca7f200115499019bb9bf86a1560f576a2d29d67c694648ee309a2c643aae97c65d4a7f1266b2ac0d2dc0d819d0dbb3efeca9884b6b9dc
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records

Andersson, AgnetaGrinienė, EvelinaBerglund, Åsa M. M.Brugel, SoniaFigueroa, DanielaGallampois, ChristineRipszam, MatyasTysklind, Mats

Search in DiVA

By author/editor
Andersson, AgnetaGrinienė, EvelinaBerglund, Åsa M. M.Brugel, SoniaFigueroa, DanielaGallampois, ChristineRipszam, MatyasTysklind, Mats
By organisation
Umeå Marine Sciences Centre (UMF)Department of Ecology and Environmental SciencesDepartment of Chemistry
In the same journal
Frontiers in Marine Science
Ecology

Search outside of DiVA

GoogleGoogle Scholar
Total: 83 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 428 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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