Recent Bayesian stable-isotope mixing models are highly sensitive to variation in discrimination factors

被引:370
作者
Bond, Alexander L.
Diamond, Antony W.
机构
[1] Univ New Brunswick, Atlantic Cooperat Wildlife Ecol Res Network, Fredericton, NB E3B 5A3, Canada
[2] Univ New Brunswick, Dept Biol, Fredericton, NB E3B 5A3, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
assumptions; conservation; discrimination factor; management; MixSIR; mixing model; Puffinus mauretanicus; sensitivity analysis; SIAR; stable isotope; Sterna hirundo; LABORATORY EXPERIMENTS; SEABIRD COMMUNITIES; DISTANCE MEASURES; CONSUMER-DIET; ECOLOGY; FRACTIONATION; UNCERTAINTY; DELTA-N-15; FISHERIES; FEATHERS;
D O I
10.1890/09-2409.1
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Stable isotopes are now used widely in ecological studies, including diet reconstruction, where quantitative inferences about diet composition are derived from the use of mixing models. Recent Bayesian models (MixSIR, SIAR) allow users to incorporate variability in discrimination factors (Delta C-13 or Delta N-15), or the amount of change in either delta C-13 or delta N-15 between prey and consumer, but to date there has been no systematic assessment of the effect of variation in Delta C-13 or Delta N-15 on model outputs. We used whole blood from Common Terns (Sterna hirundo) and muscle from their common prey items (fish and euphausiids) to build a series of mixing models in SIAR (stable isotope analysis in R) using various discrimination factors from the published literature for marine birds. The estimated proportion of each diet component was affected significantly by Delta C-13 or Delta N-15. We also use recently published stable-isotope data on the reliance of critically endangered Balearic Shearwaters (Puffinus mauretanicus) on fisheries discards to show that discrimination factor choice can have profound implications for conservation and management actions. It is therefore crucial for researchers wishing to use mixing models to have an accurate estimate of Delta C-13 and Delta N-15, because quantitative diet estimates can help to direct future research or prioritize conservation and management actions.
引用
收藏
页码:1017 / 1023
页数:7
相关论文
共 33 条
[1]  
[Anonymous], 1943, Bull Calcutta Math Soc, DOI DOI 10.1038/157869B0
[2]   Diet studies of seabirds:: a review and recommendations [J].
Barrett, Robert T. ;
Camphuysen, Kees ;
Anker-Nilssen, Tycho ;
Chardine, John W. ;
Furness, Robert W. ;
Garthe, Stefan ;
Hueppop, Ommo ;
Leopold, Mardik F. ;
Montevecchi, William A. ;
Veit, Richard R. .
ICES JOURNAL OF MARINE SCIENCE, 2007, 64 (09) :1675-1691
[3]   Factors that influence assimilation rates and fractionation of nitrogen and carbon stable isotopes in avian blood and feathers [J].
Bearhop, S ;
Waldron, S ;
Votier, SC ;
Furness, RW .
PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY, 2002, 75 (05) :451-458
[4]  
BLIGH EG, 1959, CAN J BIOCHEM PHYS, V37, P911
[5]  
Bond Alexander L., 2009, Marine Ornithology, V37, P183
[6]   Mercury concentrations in seabird tissues from Machias Seal Island, New Brunswick, Canada [J].
Bond, Alexander L. ;
Diamond, Antony W. .
SCIENCE OF THE TOTAL ENVIRONMENT, 2009, 407 (14) :4340-4347
[7]  
CAIRNS D K, 1987, Biological Oceanography, V5, P261
[8]   Comparative foraging ecology of a tropical seabird community of the Seychelles, western Indian Ocean [J].
Catry, Teresa ;
Ramos, Jaime A. ;
Jaquemet, Sebastien ;
Faulquier, Lucie ;
Berlincourt, Maud ;
Hauselmann, Antoine ;
Pinet, Patrick ;
Le Corre, Matthieu .
MARINE ECOLOGY PROGRESS SERIES, 2009, 374 :259-272
[9]   Caution on isotopic model use for analyses of consumer diet [J].
Caut, Stephane ;
Angulo, Elena ;
Courchamp, Franck .
CANADIAN JOURNAL OF ZOOLOGY, 2008, 86 (05) :438-445
[10]   Variation in discrimination factors (Δ15N and Δ13C): the effect of diet isotopic values and applications for diet reconstruction [J].
Caut, Stephane ;
Angulo, Elena ;
Courchamp, Franck .
JOURNAL OF APPLIED ECOLOGY, 2009, 46 (02) :443-453