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Proportional abundance changes in the ecological composition of molluscan assemblages across the Cretaceous–Paleogene boundary at the four studied sites. Consistent shifts across all sites are evident as increase in mobility levels (A); increase in the degree of infaunality (B); decrease in suspension feeding (C); and increase in deposit feeding (D). Carnivores (E) increased at two sites and remained stable at two other sites. Error bars represent one SE in each direction.
