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• W4221070858 abstract "The study explores the effects of environmental and climatic variables on the δ13C, δ15N and δ18O values of carnivores from modern C3 dominated environments in South Africa. Stable isotope ratios of carnivores may reflect large-scale environmental patterns better than those of herbivores because carnivores integrate variation seen at lower trophic levels. To explore this further, we have analysed δ13C and δ15N in bone collagen and δ13C and δ18O in tooth enamel of 12 species of carnivores obtained mostly from game parks and nature reserves in the winter and year-round rainfall zones of southern Africa. Sampling localities span several vegetation types, with varying rainfall, temperature, etc. We developed regression models for carnivore δ13C, δ15N and δ18O against nine meteorological variables: mean annual precipitation, mean annual temperature, mean annual soil moisture stress, mean annual potential evapotranspiration, relative humidity, summer aridity index, winter concentration of rainfall, moisture index and water deficit. There were significant correlations between δ13Cenamel and δ13Ccollagen and eight out of nine of the meteorological factors tested; the strongest correlations were with mean annual soil moisture stress (MASMS) (δ13Cenamel r2(adj) = 0.69 and δ13Ccollagen r2(adj) = 0.66). δ18Oenamel showed significant correlations with mean annual precipitation, mean annual potential evapotranspiration, summer aridity index, water deficit, relative humidity and the moisture index, but the r2 values were low. δ15Ncollagen showed significant correlations with eight out of nine of the meteorological factors (r2 values up to 0.63); only summer aridity index was not significantly correlated). Correlations between consumer δ13C values and meteorological variables were stronger for carnivores than in a previously published study of herbivores from the same region; the opposite pattern was seen in δ18O. Carnivore δ13C and δ15N are therefore effective integrators of environments. Where sample sizes permit, carnivores may be better proxies than herbivores for palaeoenvironmental reconstruction." @default.
• W4221070858 created "2022-04-03" @default.
• W4221070858 creator A5026345088 @default.
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• W4221070858 date "2023-03-01" @default.
• W4221070858 modified "2023-09-23" @default.
• W4221070858 title "Carnivore stable isotopes as environmental integrators in southern African winter rainfall ecosystems" @default.
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• W4221070858 doi "https://doi.org/10.1016/j.quaint.2022.03.008" @default.
• W4221070858 hasPublicationYear "2023" @default.
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