Eutrofização e floração de fitoplâncton marinho

Abstract

Eutrophication and phytoplankton blooms. Coastal waters eutrophication due to domestic or industrial rich nutrient discharges may result in phytoplankton blooms. These blooms may be composed of severa! groups, including dinoflagellates, which may cause "red tides". These blooms cause dissolved oxygen depletion and liberate specific toxins, wich may be responsible for massive fish kills as well as the closing of edible shellfish beds. Severa! cases were recorded on Brazilian shorelines, the most significant ones being related to high trophic levels of nutrientes, particularly on São Paulo State coast. These occurrences allowed to get more experience about monitoring of these phenomena and the corrective measures to be taken, showing the need to analyse it on a multidisciplinary approach.