Scientists have discovered dramatic changes in the chemistry and composition of Sargassum, floating brown seaweed, transforming this vibrant living organism into a toxic “dead zone.” Results suggest that increased nitrogen availability from natural and anthropogenic sources, including sewage, is supporting blooms of Sargassum and turning a critical nursery habitat into harmful algal blooms with catastrophic impacts on coastal ecosystems, economies, and human health. Globally, harmful algal blooms are related to increased nutrient pollution.
A study offers the first fine-scale analysis of vertical movement of baby white sharks in the New York Bight. Their 3D movements along with oceanographic features like sea surface temperature show they traverse variable oceanographic features across the continental shelf in the New York Bight, but certainly have their habitat preferences. More than 90 percent of them were positioned within 20 kilometers of Long Island’s southern shoreline, which further confirms the importance of this region to baby white sharks.