In 1983-1984, the sea urchin Diadema antillarum suffered mass mortality throughout the Caribbean, Florida, and Bermuda. The demise of this herbivore contributed to a phase shift of Caribbean reefs from coral-dominated to alga-dominated communities. A compilation of published data of D. antillarum population densities shows that there has been moderate recovery since 1983, with the highest rates...

Only three species of Medetera Fischer von Waldheim were known from Inner Mongolia. Here the following ten new species of Medetera, of which three species belong to Medetera apicalis group and seven belong to Medetera diadema-veles group, are added to the fauna of Inner Mongolia: Medetera albens sp. n., Medetera bisetifera sp. n., Medetera flava sp. n., Medetera ganshuiensis sp. n., Medetera li...

1 Campus Universitário Marco Zero do Equador, Rod Juscelino Kubitschek, KM-02, Jardim Marco Zero, 68.903-419 Macapá, AP, Brazil 2 Instituto de Ciências Ambientais, Quı́micas e Farmacêuticas, Universidade Federal de São Paulo, Rua Professor Artur Riedel, 275, Jd, Eldorado, 09.972-270 Diadema, SP, Brazil 3 Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia-UFF, Rua Mário Viana, 523, Sa...

Extracts of the Floridian marine cyanobacterium Lyngbya cf. confervoides were found to deter feeding by reef fish and sea urchins (Diadema antillarum). This antifeedant activity may be a reflection of the secondary metabolite content, known to be comprised of many serine protease inhibitors. Further chemical and NMR spectroscopic investigation led us to isolate and structurally characterize a n...

BACKGROUND The metabolic rate of consumers is a key driver of ecosystem dynamics. On coral reefs, herbivorous echinoids consume fleshy algae, facilitating the growth of reef-building calcified organisms; however, little is known about differences among species in their metabolic and functional ecology. Here, we used log-linear (log-log) regression models to examine the allometric scaling of mas...