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Estuarine crocodiles in a tropical coastal floodplain obtain nutrition from terrestrial prey

MFA. Author Contributions Conceptualization: Maria Fernanda Adame, Timothy D. Jardine, Brian Fry, Stuart E. Bunn. Data curation: Maria Fernanda Adame, Timothy D. Jardine, Dominic Valdez. Formal ... analysis: Maria Fernanda Adame, Timothy D. Jardine, Brian Fry. Funding acquisition: Stuart E. Bunn. 13 / 16 Investigation: Maria Fernanda Adame, Timothy D. Jardine, Dominic Valdez, Garry Lindner, Jonathan

Body size is more important than diet in determining stable-isotope estimates of trophic position in crocodilians

The trophic position of a top predator, synonymous with food-chain length, is one of the most fundamental attributes of ecosystems. Stable isotope ratios of nitrogen (δ15N) have been used to estimate trophic position of organisms due to the predictable enrichment of 15N in consumer tissues relative to their diet. Previous studies in crocodilians have found upward ontogenetic...

Temporal Uncoupling between Energy Acquisition and Allocation to Reproduction in a Herbivorous-Detritivorous Fish

Although considerable knowledge has been gathered regarding the role of fish in cycling and translocation of nutrients across ecosystem boundaries, little information is available on how the energy obtained from different ecosystems is temporally allocated in fish bodies. Although in theory, limitations on energy budgets promote the existence of a trade-off between energy...

Productivity, Disturbance and Ecosystem Size Have No Influence on Food Chain Length in Seasonally Connected Rivers

The food web is one of the oldest and most central organising concepts in ecology and for decades, food chain length has been hypothesised to be controlled by productivity, disturbance, and/or ecosystem size; each of which may be mediated by the functional trophic role of the top predator. We characterised aquatic food webs using carbon and nitrogen stable isotopes from 66 river...