Emergy-based ascendency

cg.description.themeMiscellaneous themesen_US
cg.identifier.ISIindexedISI indexed
cg.identifier.statusLimited access
cg.identifier.urlhttp://www.sciencedirect.com/science/article/pii/0304380094901481
cg.identifier.worldfish1134
cg.subject.agrovocecology
cg.subject.agrovocecosystems
dc.creatorChristensen, V.
dc.date.accessioned2019-03-07T08:13:19Z
dc.date.available2019-03-07T08:13:19Z
dc.date.issued1994
dc.description.abstractAscendency is a system indicator used for describing flow characteristics of ecosystems. Experience shows, however, that ascendency is primarily a function of the flow characteristics at the lowest trophic levels. This is because of the way ascendency is calculated: throughput times information content of the flows. Aggregation of groups with low throughput hardly reduces the information content of the flow system, and therefore hardly influences the ascendency. An emergy-based unit is suggested for calculation of ascendency. The calculation procedure is described and it is demonstrated that emergy-based ascendency has the desired properties, notably sensitivity to the flow characteristics of all trophic levels. The use of ascendency, both energy and emergy based, for aggregation of groups in ecosystems is demonstrated, and it is shown that the higher the information content of the flows the less the difference between energy- and emergy-bound ascendency.
dc.description.versionPeer Review
dc.formatapplication/pdf
dc.identifierhttp://www.sciencedirect.com/science/article/pii/0304380094901481
dc.identifier.citationEcological Modelling 72: 129-144
dc.identifier.doihttps://doi.org/10.1016/0304-3800(94)90148-1en_US
dc.identifier.issn0304-3800
dc.identifier.urihttps://hdl.handle.net/20.500.12348/2840
dc.languageen
dc.publisherElsevier
dc.sourceEcological Modelling
dc.titleEmergy-based ascendency
dc.typeJournal Article
dcterms.bibliographicCitationChristensen, V. (1994). Emergy-based ascendency. Ecological Modelling 72: 129-144

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