Trophic level, food chain length and omnivory in the Paraná River: a food web model approach in a floodplain river system

To determine the mean trophic level and food chain length and to quantify omnivory in a floodplain lake of the Middle Paraná River, we constructed a food web model based on available data. Because proper selection of basal resources is essential, we performed stepwise model selection to decide which...

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