Change search
ReferencesLink to record
Permanent link

Direct link
Future Climate Scenarios for a Coastal Productive Planktonic Food Web Resulting in Microplankton Phenology Changes and Decreased Trophic Transfer Efficiency
Show others and affiliations
2014 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 9, no 4, e94388- p.Article in journal (Refereed) Published
Abstract [en]

We studied the effects of future climate change scenarios on plankton communities of a Norwegian fjord using a mesocosm approach. After the spring bloom, natural plankton were enclosed and treated in duplicates with inorganic nutrients elevated to pre-bloom conditions (N, P, Si; eutrophication), lowering of 0.4 pH units (acidification), and rising 3 degrees C temperature (warming). All nutrient-amended treatments resulted in phytoplankton blooms dominated by chain-forming diatoms, and reached 13-16 mu g chlorophyll (chl) a l(-1). In the control mesocosms, chl a remained below 1 mu g l(-1). Acidification and warming had contrasting effects on the phenology and bloom-dynamics of autotrophic and heterotrophic microplankton. Bacillariophyceae, prymnesiophyceae, cryptophyta, and Protoperidinium spp. peaked earlier at higher temperature and lower pH. Chlorophyta showed lower peak abundances with acidification, but higher peak abundances with increased temperature. The peak magnitude of autotrophic dinophyceae and ciliates was, on the other hand, lowered with combined warming and acidification. Over time, the plankton communities shifted from autotrophic phytoplankton blooms to a more heterotrophic system in all mesocosms, especially in the control unaltered mesocosms. The development of mass balance and proportion of heterotrophic/autotrophic biomass predict a shift towards a more autotrophic community and less-efficient food web transfer when temperature, nutrients and acidification are combined in a future climate-change scenario. We suggest that this result may be related to a lower food quality for microzooplankton under acidification and warming scenarios and to an increase of catabolic processes compared to anabolic ones at higher temperatures.

Place, publisher, year, edition, pages
2014. Vol. 9, no 4, e94388- p.
National Category
Climate Research
URN: urn:nbn:se:umu:diva-91070DOI: 10.1371/journal.pone.0094388ISI: 000336909100063OAI: diva2:733637
Available from: 2014-07-10 Created: 2014-07-10 Last updated: 2014-07-10Bibliographically approved

Open Access in DiVA

fulltext(2553 kB)66 downloads
File information
File name FULLTEXT01.pdfFile size 2553 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Båmstedt, Ulf
By organisation
Department of Ecology and Environmental Sciences
In the same journal
Climate Research

Search outside of DiVA

GoogleGoogle Scholar
Total: 66 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

Altmetric score

Total: 195 hits
ReferencesLink to record
Permanent link

Direct link