Mass mortalities in natural populations, particularly those that leave few survivors over large
spatial areas, may cause long-term ecological perturbations. Yet mass mortalities may …

The fear large carnivores inspire in large ungulates has been argued to have cascading
effects down food webs. However, a direct link between ungulate habitat use and their fear …

We evaluated the effects of potential predators from intertidal habitats on Strongylocentrotus
purpuratus survival using laboratory experiments and assessed abundances of main …

We assessed the influence of rock cavities, or pits, on the growth dynamics and behavior of
the purple sea urchin, Strongylocentrotus purpuratus. In a paired-designed, laboratory …

Sea urchins have skeletons made of calcareous plates, and growth occurs by enlarging
plates and adding new ones. Spines grow as do ossicles of Aristotle's lantern. Differences in …

The presence of large carnivores can affect lower trophic levels by suppressing
mesocarnivores and reducing their impacts on prey. The mesopredator release hypothesis …

Though phenotypically plastic responses in echinoids are well studied, the majority of the
literature examines the effect of altered diet. Some species, however, such as the purple sea …

By creating novel habitats, habitat‐modifying species can alter patterns of diversity and
abundance in marine communities. Many sea urchins are important habitat modifiers in …

Body size has great influence on feeding, reproduction, and ecological importance. This
study measures growth, reproduction, and feeding for several northeastern Pacific intertidal …

Regular sea urchin spines (mainly Plococidaris verticillata and Heterocentrotus
mammillatus) are studied with respect to their general structure, surface sculpturing and …