Using stable isotopes to differentiate trophic feeding channels within soil food webs.

Autor: Crotty FV; Department of Biology, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada. felicity.crotty@dal.ca, Adl SM, Blackshaw RP, Murray PJ
Jazyk: angličtina
Zdroj: The Journal of eukaryotic microbiology [J Eukaryot Microbiol] 2012 Nov-Dec; Vol. 59 (6), pp. 520-6. Date of Electronic Publication: 2012 Feb 02.
DOI: 10.1111/j.1550-7408.2011.00608.x
Abstrakt: The soil is probably the most diverse habitat there is, with organisms ranging in sizes from less than 1 μm to several metres in length. However, it is increasingly evident that we know little about the interactions occurring between these organisms, the functions that they perform as individual species, or together within their different feeding guilds. These interactions between groups of organisms and physical and chemical processes shape the soil as a habitat and influence the nature of the soil food web with consequences for the above-ground vegetation and food web. Protists are known as one of the most abundant groups of bacterivores within the soil; however, they are also consumers of a number of other food sources. Even though they are responsible for a large proportion of the mineralisation of bacterial biomass and have a large impact on the C and N cycles within the soil they are regularly overlooked when investigating the complete soil food web. Recently, stable isotopes have been used to determine trophic interactions and here we describe how this technique has been used to highlight linkages between protists and the soil food web.
(© 2012 The Author(s) Journal of Eukaryotic Microbiology © 2012 International Society of Protistologists.)
Databáze: MEDLINE
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