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    Food web structure and trophic levels in polyculture rice-crab fields

    Stable carbon and nitrogen isotopes were used to investigate nutrient pathways and trophic relationships from the rice-crab system in Pan**, Liaoning Province, China. Values of δ13C ranged from −27.38‰±0.44‰ to ...

    Kai Guo 郭凯, Wen Zhao 赵文, Wenkuan Li **文宽… in Chinese Journal of Oceanology and Limnology (2015)