Contrasting patterns of allochthony among three major groups of crustacean zooplankton in boreal and temperate lakes
Författare
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.
Publiceringsår
2014
Språk
Engelska
Sidor
1947-1959
Publikation/Tidskrift/Serie
Ecology
Volym
95
Issue
7
Dokumenttyp
Artikel i tidskrift
Förlag
Ecological Society of America
Ämne
- Physical Geography
Nyckelord
- allochthony
- bacterial production
- boreal lakes
- Calanoida
- Cladocera
- Cyclopoida
- dissolved organic matter
- particulate organic matter
- temperate lakes
- zooplankton
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0012-9658