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Ice-free areas in Antarctica could expand by close to 25 per cent by 2100 and drastically change the biodiversity of the continent, research published this week in Nature has shown.

A Canadian technology that can identify a substance by scanning it — as a character in Star Trek might — could become a crucial tool to capture DNA data in the environment and protect it.

DNA barcoding, developed at the University of Guelph by Professor Paul Hebert, uses genetic variations to identify different species. It’s similar to how a supermarket checkout scanner reads variations in a UPC barcode’s lines to identify a product you buy.

India and Pakistan are among the most heavily irrigated nations on earth, producing enough wheat, corn, and other crops to feed their combined populations of 1.5 billion. But in South Asia’s breadbasket, which includes the Punjab region, farmers have pumped water out of the ground so heedlessly for so long that scientists now estimate aquifers there could run dry by mid-century. Add to that the disruptive effects of climate change and it’s clear that South Asian agriculture is facing a perilous future.

En septiembre de 2011, después de 20 años de planificación, se inició la desmantelación de las represas Elwha y Glines en el río Elwha, en el noroeste del estado de Washington. En aquel momento, era el proyecto más grande de remoción de presas en la historia de los Estados Unidos, y tomó casi tres años para que ambas barreras fueran desmanteladas y para que el río volviera a fluir libremente.

A lo largo de sus casi cien años de vida, las dos represas recolectaron más de 24 millones de metros cúbicos de sedimento detrás de ellos, lo suficiente para llenar el estadio de los halcones Marinos de Seattle ocho veces. Y desde su remoción, el Elwha ha recuperado el sedimento atrapado y lo ha distribuido río abajo, haciendo que el ecosistema ribereño sea reconstruido y transformado. Se han llevado a la costa grandes cantidades de limo, arena y grava, resucitando un ecosistema de humedales largamente privado de sedimentos.

ndustrial fishing fleets dump nearly 10 million tonnes of good fish back into the ocean every year, according to new research.

The study by researchers with Sea Around Us, an initiative at the University of British Columbia’s Institute for the Oceans and Fisheries and the University of Western Australia, reveals that almost 10 per cent of the world’s total catch in the last decade was discarded due to poor fishing practices and inadequate management.  This is equivalent to throwing back enough fish to fill about 4,500 Olympic sized swimming pools every year.