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	Analys av topologi i födovävar	Distance Sampling
Ämnesområde	Ekologi	Ekologi
Familj	Process / pipeline	Process / pipeline
Ursprungsår	2000	1993
Upphovsperson	Richard Williams and Neo Martinez	Stephen Buckland
Typ	ecological network characterization	population abundance estimation
Ursprungskälla	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.	Buckland, S. T., Anderson, D. R., Burnham, K. P., Laake, J. L., Borchers, D. L., & Thomas, L. (1993). Distance Sampling: Estimating Abundance of Biological Populations. Chapman and Hall, London.
Alias	food web structure, network topology, trophic network, food chain analysis	line transect, point transect, distance estimation, detection probability
Närliggande	4	4
Sammanfattning	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.	Distance sampling is a statistical method for estimating population abundance from data on distances between observers and detected individuals. Developed by Buckland and colleagues (1993) and formalized in the software Distance, this approach accounts for imperfect detection: animals far from an observer are less likely to be detected. By modeling the detection function (probability of detecting an animal at various distances), distance sampling produces unbiased estimates of abundance and density even when detection is incomplete.