The observed high abundance of algae and cyanobacteria on Guam’s coral reefs raises concern regarding a possible shift from coralto algal-dominated communities. Possible increased nutrient supply to macroalgae and cyanobacteria via the watershed due to anthropogenic disturbance could be a partial cause. In this study, 2 outdoor microcosm experiments are used to test the effects of iron, nitrate...

The 1983-1984 mass mortality of Diadema antillarum produced severe damages on Caribbean reefs contributing to substantial changes in community structure that still persist. Despite the importance of Diadema grazing in structuring coral reefs, available information on current abundances and algal-urchin interactions in Cuba is scarce. We analyzed spatial variations in Diadema abundance and its i...

reports of coral disease outbreaks have increased in recent decades, but often few details are known about these outbreaks, such as environmental triggers, associated biological variables, or even the precise temporal span of the outbreak. here we document an acute outbreak of a rapid tissue loss disease on the highest live coral cover (15%–30%) reefs within Dry tortugas national park, florida,...

When predicting the response of marine ecosystems to climate change, it is increasingly recognized that understanding indirect effects ocean acidification on trophic interactions as important studying direct organism physiology. Furthermore, comprehensive studies examine these simultaneously are needed identify and link underlying mechanisms driving changes in species interactions. Using an ons...

• Insecticidal activity of 47 macroalgae mostly from Mediterranean Sea was examined. Cholinesterase and tyrosinase inhibitory effect the alga extracts investigated. D. dichotoma var. intricata only one exhibiting BChE inhibition over 50%. by four diterpenes in DDI investigated silico . The their metabolites might be new sources novel insecticides. Ethanolic prepared forty-seven species collecte...

Predicting the host range for herbivores has been a major aim of research into plant-herbivore interactions and an important model system for understanding the evolution of feeding specialization. Among many terrestrial insects, host range is strongly affected by herbivore phylogeny and long historical associations between particular herbivore and plant taxa. For small herbivores in marine envi...

Temperate marine rocky habitats may be alternatively characterized by well vegetated macroalgal assemblages or barren grounds, as a consequence of direct and indirect human impacts (e.g. overfishing) and grazing pressure by herbivorous organisms. In future scenarios of ocean acidification, calcifying organisms are expected to be less competitive: among these two key elements of the rocky subtid...