Empirical correspondence between trophic transfer efficiency in freshwater food webs and the slope of their size spectra

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Sökning: onr:"swepub:oai:DiVA.org:uu-347754" > Empirical correspon...

1 av 1
Föregående post
Nästa post
Till träfflistan

Mehner, ThomasLeibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany (författare)

Empirical correspondence between trophic transfer efficiency in freshwater food webs and the slope of their size spectra

Artikel/kapitelEngelska2018

Förlag, utgivningsår, omfång ...

2018-06
John Wiley & Sons,2018
printrdacarrier

Nummerbeteckningar

LIBRIS-ID:oai:DiVA.org:uu-347754
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-347754URI
https://doi.org/10.1002/ecy.2347DOI

Kompletterande språkuppgifter

Språk:engelska
Sammanfattning på:engelska

Ingår i deldatabas

SwePubSwePub

Klassifikation

Ämneskategori:ref swepub-contenttype
Ämneskategori:art swepub-publicationtype

Anmärkningar

The density of organisms declines with size, because larger organisms need more energy than smaller ones and energetic losses occur when larger organisms feed on smaller ones. A potential expression of density-size distributions are Normalized Biomass Size Spectra (NBSS), which plot the logarithm of biomass independent of taxonomy within bins of logarithmic organismal size, divided by the bin width. Theoretically, the NBSS slope of multi-trophic communities is exactly - 1.0 if the trophic transfer efficiency (TTE, ratio of production rates between adjacent trophic levels) is 10% and the predator-prey mass ratio (PPMR) is fixed at 10(4). Here we provide evidence from four multi-trophic lake food webs that empirically estimated TTEs correspond to empirically estimated slopes of the respective community NBSS. Each of the NBSS considered pelagic and benthic organisms spanning size ranges from bacteria to fish, all sampled over three seasons in 1 yr. The four NBSS slopes were significantly steeper than -1.0 (range -1.14 to -1.19, with 95% CIs excluding -1). The corresponding average TTEs were substantially lower than 10% in each of the four food webs (range 1.0% to 3.6%, mean 1.85%). The overall slope merging all biomass-size data pairs from the four systems (-1.17) was almost identical to the slope predicted from the arithmetic mean TTE of the four food webs (-1.18) assuming a constant PPMR of 10(4). Accordingly, our empirical data confirm the theoretically predicted quantitative relationship between TTE and the slope of the biomass-size distribution. Furthermore, we show that benthic and pelagic organisms can be merged into a community NBSS, but future studies have yet to explore potential differences in habitat-specific TTEs and PPMRs. We suggest that community NBSS may provide valuable information on the structure of food webs and their energetic pathways, and can result in improved accuracy of TTE-estimates.

Ämnesord och genrebeteckningar

NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng

Biuppslag (personer, institutioner, konferenser, titlar ...)

Lischke, BettyLeibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany (författare)
Scharnweber, Kristin,1983-Uppsala universitet,Limnologi,Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany(Swepub:uu)krisc419 (författare)
Attermeyer, KatrinUppsala universitet,Limnologi,Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany(Swepub:uu)katat635 (författare)
Brothers, SorenLeibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany;Department of Watershed Sciences and Ecology Center, Utah State University, Logan, Utah, USA (författare)
Gaedke, UrsulaInstitute for Biochemistry and Biology, University of Potsdam, Potsdam, Germany (författare)
Hilt, SabineLeibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany (författare)
Brucet, SandraAquatic Ecology Group, University of Vic – Central University of Catalonia, Vic, Barcelona, Catalonia, Spain;Catalan Institution for Research and Advanced Studies ICREA, Barcelona, Catalonia, Spain (författare)
Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, GermanyLimnologi (creator_code:org_t)

Sammanhörande titlar

Ingår i:Ecology: John Wiley & Sons99:6, s. 1463-14720012-96581939-9170

Internetlänk

Hitta via bibliotek

Ecology (Sök värdpublikationen i LIBRIS)

Till lärosätets databas

1 av 1
Föregående post
Nästa post
Till träfflistan

Hitta mer i SwePub

Av författaren/redakt...: Mehner, Thomas; Lischke, Betty; Scharnweber, Kri ...; Attermeyer, Katr ...; Brothers, Soren; Gaedke, Ursula; visa fler...; Hilt, Sabine; Brucet, Sandra; visa färre...

Om ämnet

NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Ekologi

Artiklar i publikationen: Ecology

Av lärosätet: Uppsala universitet

Sök utanför SwePub

Sök vidare i:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se