查看文章

Nitrogen and carbon stable isotopic compositions (δ¹⁵N and δ¹³C) of consumers have been used for physiological and food web studies. Previous studies have shown δ¹⁵N and δ¹³C values are affected by several biological and environmental factors during starvation, but the generality of the effect of starvation on δ¹⁵N and δ¹³C values has not yet been tested. Here, we performed a meta-analysis to evaluate the effects of starvation on δ¹⁵N and δ¹³C values of consumers, and the underlying factors that may explain the observed variation. The δ¹⁵N and δ¹³C values were calculated as the differences between the final δ¹⁵N and δ¹³C values of consumers (post-starvation) and the pre-starvation values on each experiment. Our meta-analysis showed a large variation in the δ¹⁵N and δ¹³C values of consumers (δ¹⁵N range: –0.82 to 4.30‰; mean: 0.47‰ and δ¹³C range: –1.92 to 2.62‰; mean: 0.01‰). The δ …