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Contrasting patterns of allochthony among three major groups of crustacean zooplankton in boreal and temperate lakes

På svenska

Author

  • Martin Berggren
  • Susan E. Ziegler
  • Nicolas F. St-Gelais
  • Beatrix E. Beisner
  • Paul A. del Giorgio

Summary, in English

The importance of terrestrial-derived organic matter for lake zooplankton communities remains debated, partly because little is known about the basic pathways by which allochthonous carbon is transferred to zooplankton, and whether these vary among the major taxonomic and functional groups. We quantified allochthony of three zooplankton groups (Cladocera, Calanoida, and Cyclopoida) across 18 lakes in Quebec, spanning broad gradients of dissolved organic matter (DOM) and lake trophy, using a multi-isotope (delta H-2 + delta C-13), multi-source (terrestrial, phytoplanktonic, benthic) approach. All three zooplankton groups had significant levels of allochthony, but differed greatly in their respective patterns across lakes. Allochthony in Calanoida and Cyclopoida was linked to detrital food chains based on particulate organic matter (POM) and on DOM, respectively, whereas in Cladocera it appeared related to both pathways; not surprisingly this latter group had the highest mean allochthony (0.31; compared to 0.18 in Cyclopoida and 0.16 in Calanoida). This study highlights the complexity of the pathways of delivery and transfer of terrestrial organic matter in freshwaters, and underscores the role that microbial food webs play in this transfer.

Publishing year

2014

Language

English

Pages

1947-1959

Publication/Series

Ecology

Volume

95

Issue

7

Document type

Journal article

Publisher

Ecological Society of America

Topic

  • Physical Geography

Keywords

  • allochthony
  • bacterial production
  • boreal lakes
  • Calanoida
  • Cladocera
  • Cyclopoida
  • dissolved organic matter
  • particulate organic matter
  • temperate lakes
  • zooplankton

Status

Published

ISBN/ISSN/Other

  • ISSN: 0012-9658