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F. JordánInstitute of Ecology and Botany of the Hungarian Academy of Sciences, Vácrátót, Hungary Please ask the editor of the journal.

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In complex, modern food webs, the analysis of pairwise interactions gives weak predictions of the behaviour of either single species or the whole community. Indirect effects call for explicit study and quantification. However, just as focusing only on pairwise interactions is incorrect, overemphasising the role of long, indirect pathways also seems to be unrealistic. Thus, a reasonable range of indirect trophic effects spreading through the food web is to be defined and quantified. I suggest a graph theoretical measure for quantifying this range, considering only network position (topology). I call this the trophic field of a species (or trophic group), recalling the idea that field theory could be a fruitful research programme in biology. Further, I propose a measure for the quantification of the indirect component of the trophic field. Finally, the use of introduced concepts and indices is illustrated by analysing the trophic flow network of the Schlei Fjord ecosystem (N. Germany).

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Community Ecology
Language English
Size A4
Year of
Foundation
2000
Volumes
per Year
1
Issues
per Year
3
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1585-8553 (Print)
ISSN 1588-2756 (Online)

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