Longer and less overlapping food webs in anthropogenically disturbed marine ecosystems: confirmations from the past.

Conversely in southern Patagonia, the sea lions' ellipse area has been constant over time, whereas that of fur seals showed a trend to increase through time and that of penguins slightly increased from the EAP period to the LAP period to then slightly decreased in the present food web ( Table 7 ).

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Interestingly, the SIBER ellipse areas (SEA B ) calculated for each species ( Table 7 ) exhibited a decreasing trend throughout time in central-northern Patagonia, although it was statistically significant only for sea lions.

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