uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • 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
The effect of seasonal variation in selective feeding by zebra mussels (Dreissena polymorpha) on phytoplankton community composition
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Limnology. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Limnology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Limnology.
2007 (English)In: Freshwater Biology, ISSN 0046-5070, E-ISSN 1365-2427, Vol. 52, no 5, 823-842 p.Article in journal (Refereed) Published
Abstract [en]

To investigate the impact of zebra mussels (Dreissena polymorpha) on phytoplankton community composition, temporal variability in selective feeding by the mussels was determined from April to November 2005 in a natural lake using Delayed Fluorescence (DF) excitation spectroscopy. Selective grazing by zebra mussels varied in relation to seasonal phytoplankton dynamics; mussels showed a consistent preference for cryptophytes and avoidance of chlorophytes and cyanobacteria. Diatoms, chrysophytes and dinoflagellates responded differentially to zebra mussel grazing depending on their size. Analysis of excreted products of the zebra mussels revealed that in addition to chlorophytes and cyanobacteria, phytoplankton >50 μm and very small phytoplankton (≤7 μm) were largely expelled in pseudofaeces. The zebra mussel is a selective filter-feeder that alters its feeding behaviour in relation to phytoplankton composition to capture and ingest high quality phytoplankton, especially when phytoplankton occur in preferred size ranges. Flexibility of zebra mussel feeding behaviour and variation in susceptibility among phytoplankton groups to mussel ingestion indicate that invading zebra mussels could alter phytoplankton community composition of lakes and have important ecosystem consequences.

Place, publisher, year, edition, pages
2007. Vol. 52, no 5, 823-842 p.
Keyword [en]
Delayed Fluorescence, Lake Erken, phytoplankton dynamics, selective feeding, Zebra mussel
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-96406DOI: 10.1111/j.1365-2427.2007.01732.xISI: 000245987200005OAI: oai:DiVA.org:uu-96406DiVA: diva2:170971
Available from: 2007-11-14 Created: 2007-11-14 Last updated: 2017-12-14Bibliographically approved
In thesis
1. The Invasion of the Zebra Mussel - Effects on Phytoplankton Community Structure and Ecosystem Function
Open this publication in new window or tab >>The Invasion of the Zebra Mussel - Effects on Phytoplankton Community Structure and Ecosystem Function
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Biological invasion has become a major threat to economy, ecology, global biodiversity and ecosystem function of aquatic ecosystems. The main aim of the thesis was to study the effects of the zebra mussel (Dreissena polymorpha), a versatile invasive species, on phytoplankton dynamics and ecosystem function of lakes.

In a first attempt, I compared the density of Dreissena and the physicochemical data of ecosystems that it invaded among North American and European lakes to identify important factors in its invasion success. Secondly, I investigated the impact of zebra mussels on phytoplankton community composition in a natural lake. Thirdly, I evaluated whether zebra mussel feeding behavior were affected by the presence of predatory waterborne cues. Finally, I examined the effect of Dreissena on seston stoichiometry.

A Generalized Additive Model revealed that a joint effect of surface area, mean depth, total phosphorus and calcium concentrations can explain the variability in Dreissena density. Selective grazing by zebra mussels varied in relation to seasonal phytoplankton dynamics. Risk cues released by predators affected both feeding rate and prey selection of the mussels and had cascading indirect effects on phytoplankton biomass and community structure. I found that the flux in nutrients caused by differences in zebra mussel consumption lead to a variation in phytoplankton nutrient limitation.

The flexibility of zebra mussel feeding behavior and variation in susceptibility among phytoplankton groups to mussel ingestion indicate that invading zebra mussels could alter phytoplankton community composition of lakes and have important ecosystem consequences. The results of this thesis contribute to the growing evidence that predators indirectly affect resource dynamics and food web structure through their non-lethal effects on consumers. The results suggested that zebra mussel can indirectly both reduce and increase the energy transfer efficiency from primary producers to upper trophic levels in the pelagic and benthic food webs, respectively.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2007. 54 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 361
Keyword
Invasive species, Zebra mussel, Invasion success, Selective feeding, Non-lethal effects of predator, Seston stoichiometry, Delayed fluorescence excitation spectroscopy, Phytoplankton dynamics, Trait-mediated indirect interaction, Ecosystem function
National Category
Ecology
Identifiers
urn:nbn:se:uu:diva-8301 (URN)978-91-554-7015-9 (ISBN)
Public defence
2007-12-06, Lindahlssalen, Kärnhuset, EBC, Norbyvägen, Uppsala, 13:00
Opponent
Supervisors
Available from: 2007-11-14 Created: 2007-11-14 Last updated: 2016-04-28Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Authority records BETA

Naddafi, RahmatPettersson, KurtEklöv, Peter

Search in DiVA

By author/editor
Naddafi, RahmatPettersson, KurtEklöv, Peter
By organisation
LimnologyLimnology
In the same journal
Freshwater Biology
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 836 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • 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