21 news posts in Earth science

Earth science

15 Feb 2021

Strange creatures accidentally discovered beneath Antarctica’s ice shelves

Prior research has suggested that the watery depths below the Antarctic ice shelves are too cold and nutrient poor to sustain much life. But a new study from British Antarctic Survey reveals the discovery of a colony of sponges and other animals attached to a boulder on the sea floor – challenging researchers’ understanding about the existence of life in extreme environments. British Antarctic survey camera travelling down the 900-meter-long bore hole in the Filchner-Ronne ice shelf. (marine creature pictured is unrelated to the discovery) CREDIT: Dr Huw Griffiths/British Antarctic Survey By K.E.D Coan, science writer/British Antarctic Survey Far underneath the ice shelves of the Antarctic, there’s more life than expected, finds a recent study in the journal Frontiers in Marine Science. During an exploratory survey, researchers drilled through 900 meters of ice in the Filchner-Ronne Ice Shelf, situated on the south eastern Weddell Sea. At a distance of 260km away from the open ocean, under complete darkness and with temperatures of -2.2°C, very few animals have ever been observed in these conditions. But this study is the first to discover the existence of stationary animals – similar to sponges and potentially several previously unknown species – attached to a boulder […]

Earth science

10 Feb 2021

Scientists propose three-step method to reverse significant reforestation side effect

By Colm Gorey, Frontiers science writer Image: Farid Suhaimi/Shutterstock Reforestation efforts using a monoculture of a fast-growing tree species, while effective, significantly impact the soil water content of humid, tropical regions and threatens global freshwater supplies. Scientists have now found that the transpiration rate and transpiration-related trait values are up to 10 times greater in the fast-growing species than nearby, dominant slow-growing species. The team has proposed a three-step method for ensuring reforestation efforts in tropical regions don’t harm the surrounding soil water content. ► Read original article► Download original article (pdf) While deforestation levels have decreased significantly since the turn of the 21st century, the United Nations (UN) estimates that 10 million hectares of trees have been felled in each of the last five years. Aside from their vital role in absorbing CO2 from the air, forests play an integral part in maintaining the delicate ecosystems that cover our planet. Efforts are now underway across the world to rectify the mistakes of the past, with the UN Strategic Plan for Forests setting out the objective for an increase in global forest coverage by 3% by 2030. With time being of the essence, one of the most popular methods of reforestation in […]

Earth science

03 Feb 2021

Why we cannot ignore the place of viruses on the ‘Tree of Life’

By Dr Hugh Harris, APC Microbiome Ireland/University College Cork Image: Corona Borealis Studio/Shutterstock One particular virus has come to dominate our lives. Now Dr Hugh Harris of APC Microbiome Ireland and University College Cork writes that viruses deserve a place on the ‘Tree of Life’. A single virus has dramatically changed our lives. SARS-CoV-2 is keeping most of us at home, often with other members of our family. The next time we get annoyed by a relative, some perspective might be achieved by thinking about how inclusive the concept of family can be. A family tree is a familiar sight to many people. There is something intriguing and even nostalgic about looking into the past, beyond our parents and grandparents. We all want to know where we came from. How far back do the branches of kinship reach? A visit to the zoo might have us looking at the chimpanzees and gorillas as they go about their day – these are our cousins. Richard Dawkins described a thought experiment where a female chimpanzee held the hand of her mother. The mother, in turn, held the hand of her own mother and so on back across the generations, forming an unbroken […]