/newsroom/taxonomy/term/3492/all en /newsroom/channels/news/marine-species-stlawrence-estuary-endangered-rapid-drop-levels-oxygen-335187 <p>Concentrations of dissolved oxygen in the deep waters of the Lower St. Lawrence Estuary (LSLE) have dropped by over 50% over the past two years. The consequences for many marine species, who depend on oxygen to survive, are potentially very serious. A compilation of historical data reveals that dissolved oxygen concentrations in the deep waters of the Lower St. Lawrence Estuary decreased by about 50% during the fifty years between 1934 and 1985. And then remained fairly constant until 2019, when the situation changed dramatically.</p> Fri, 26 Nov 2021 16:59:10 +0000 katherine.gombay@mcgill.ca 283664 at /newsroom /newsroom/anthony-ricciardi Tue, 26 Feb 2019 16:59:44 +0000 Anonymous 22664 at /newsroom /newsroom/channels/news/microplastic-pollution-discovered-st-lawrence-river-239101 <p>A team of researchers from Æ»¹ûÒùÔº and the Quebec government have discovered microplastics (in the form of polyethylene 'microbeads,' less than 2 mm in diameter) widely distributed across the bottom of the St. Lawrence River, the first time such pollutants have been found in freshwater sediments. Tue, 23 Sep 2014 16:23:09 +0000 cynthia.lee@mcgill.ca 21154 at /newsroom