Sammenlign metoder

	Fødenetværkstopologianalyse	Stable Isotope Analysis in R (SIAR) mixing model
Fagområde	Økologi	Økologi
Familie	Process / pipeline	Process / pipeline
Oprindelsesår	2000	2010
Ophavsperson	Richard Williams and Neo Martinez	Andrew Parnell
Type	ecological network characterization	diet and source apportionment analysis
Oprindelig kilde	Dunne, J. A., Williams, R. J., & Martinez, N. D. (2002). Network structure and robustness of marine food webs. The American Naturalist, 160(1), 117-129.	Parnell, A. C., Inger, R., Bearhop, S., & Jackson, A. L. (2010). Source partitioning using stable isotopes: coping with too much variation. PLoS ONE, 5(3), e9672.
Aliasser	food web structure, network topology, trophic network, food chain analysis	isotope mixing model, Bayesian mixing model, source apportionment, diet analysis
Relaterede	4	4
Resumé	Food web topology analysis characterizes the structure of predator-prey interactions within ecological communities using network metrics. Pioneered by Williams and Martinez (2000) and extended by Dunne and colleagues (2002), this approach maps which species eat which and quantifies network properties (connectivity, clustering, robustness). Understanding food web structure reveals how ecosystems are organized, how stable they are to species loss, and what roles different species play in ecosystem function.	The Stable Isotope Analysis in R (SIAR) mixing model is a Bayesian framework for estimating the proportional contributions of dietary sources to a consumer, using stable isotope ratios. Developed by Parnell and colleagues (2010) and implemented in the R package siar (and its successor MixSIAR), this method integrates isotopic data from potential food sources and consumers to infer diets. It accounts for uncertainty in isotope fractionation (the shift in isotope ratios between diet and tissue) and natural variation among source populations, producing probability distributions rather than point estimates of diet composition.