Scientists have found an alarming accumulation of certain persistent organic pollutants in an environment previously thought pristine and untouched by humans: the deep sea.
Rachel Carson was right to focus her novel on the effects of DDT; DDT persists to this day in dolphins off the California coast in forms that are often not monitored by monitoring programs.
A group of international researchers have found that marine phytoplankton communities are susceptible to impairment from complex mixtures of organic pollutants found in oceanic environments.
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You may think you’re familiar with the side effects of most common medications, but there are other, hidden side effects occurring beneath the surfaces of our oceans, lakes, and rivers. In this study, researchers brought these side effects to light by measuring a wide range of pharmaceuticals, drugs, and other manmade chemicals, in fish from Puget Sound.
Dolphins and humans are continuously exposed to low levels of various halogenated, persistent manmade pollutants through their diets. In this study, blubber samples from 8 dolphins were analyzed by cutting-edge techniques to find out what’s accumulating in these marine predators. Findings suggest many routine monitoring programs underestimate the exposure of marine mammals to toxins.
Large numbers of green sea turtles are growing tumors that impede their swimming, block their sight, and prevent them from feeding. Researchers know that the tumor-causing disease, fibropapillomatosis, is more prevalent in some areas than others, but no one knows why. In this study, scientists set out to determine whether exposure to chemical pollutants may make sea turtles more susceptible to fibropapillomatosis.
Analyzing changes in gene transcription is a way to detect adverse effects in organisms before they are observable on the whole organism level. Here, a Canadian research group set out to determine whether beluga whales in the relatively pristine Beaufort Sea are accumulating toxic pollutants at levels that could affect the future health of the beluga population.
Oceanographers from Spain have measured several commonly used (and potentially harmful) organophosphate ester flame retardants in the air over the Mediterranean and Black Seas. What does it mean for the environment? We’re only just beginning to find out.
Animals in early stages of development are particularly susceptible to harmful effects of toxic pollutants. For this reason, the transfer of toxic pollutants from mothers to their young has been the subject of intense research. In this study, researchers from California State investigated how non-mammalian species like sharks, skates, and rays pass toxic pollutants on to their young.
The ocean is home to many creatures: plankton, fish, mammals, etc. But it is also ‘home’ to a number of persistent organic pollutants (POPs), which are usually at low concentrations in the water but have the potential to bioaccumulate. Where do these pollutants end up? Do they stay in the surface water or do they sink into the deep?
Fluorinated compounds are an emerging class of persistent pollutants that have a global presence in the environment, biota, and humans, but are only now beginning to be regulated. A group of researchers from Scandinavia looked at liver samples taken from otters in Sweden and Norway from 1972-2011 and found that concentrations of many of these compounds have increased at disquieting rates, particularly within the last decade.
Australian and Norwegian researchers measured levels of pesticides and PCBs in southern hemisphere humpback whales to find out whether extreme weight loss during migration could have unforeseen consequences for the species.