Roundup: Everest, Subglacial Microbiomes, and Tidewater Glaciers

Posted by on Dec 12, 2016

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Roundup: Everest, Anaerobes & Fjords

 

China Tries to Conquer Everest

From Bloomberg: “Earlier this year, China opened a new paved road that winds 14,000 feet up the slope [of Mount Everest] and stops at the base camp parking lot. Plans are in the works to build an international mountaineering center, complete with hotels, restaurants, training facilities, and search-and-rescue services. There will even be a museum… What’s bad for Nepal will likely turn out to be a boon for tourists. Instead of fencing off Everest as a pristine wilderness, much as the U.S. has done with its national parks, China is approaching the Himalayas as the Europeans have the Alps… And if China sticks to it, it may well become the world’s new gateway to the Himalayas.”

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China opened a new paved road to Mount Everest (source: Mudanjiang Regional Forum).

China’s new paved road to Mount Everest (Source: Mudanjiang Regional Forum).

 

Implications for the Subglacial Microbiome

From Microbial Ecology: “Glaciers have recently been recognized as ecosystems comprised of several distinct habitats: a sunlit and oxygenated glacial surface, glacial ice, and a dark, mostly anoxic [absence of oxygen] glacial bed. Surface meltwaters annually flood the subglacial sediments by means of drainage channels. Glacial surfaces host aquatic microhabitats called cryoconite holes, regarded as ‘hot spots’ of microbial abundance and activity, largely contributing to the meltwaters’ bacterial diversity. This study presents an investigation of cryoconite hole anaerobes [organisms that live without air] and discusses their possible impact on subglacial microbial communities.”

Learn more about this study here.

Photomicrograph of Gram-stained enrichment culture, showing several cell morphotypes (source: Implications for the Subglacial Microbiome).

Photomicrograph of Gram-stained enrichment culture, showing several cell morphotypes (Source: Microbial Ecology).

 

Analysis of Icebergs in a Tidewater Glacier Fjord

From PLOS ONE: “Tidewater glaciers are glaciers that terminate in and calve icebergs into the ocean. In addition to the influence that tidewater glaciers have on physical and chemical oceanography, floating icebergs serve as habitat for marine animals such as harbor seals. The availability and spatial distribution of glacier ice in the fjords is likely a key environmental variable that influences the abundance and distribution of selected marine mammals… Given the predicted changes in glacier habitat, there is a need for the development of methods that could be broadly applied to quantify changes in available ice habitat in tidewater glacier fjords. We present a case study to describe a novel method that uses object-based image analysis (OBIA) to classify floating glacier ice in a tidewater glacier fjord from high-resolution aerial digital imagery.”

Read more about this study here.

Map of Johns Hopkins Inlet study area (source: Quantification and Analysis of Icebergs in a Tidewater Glacier Fjord Using an Object-Based Approach).

Map of Johns Hopkins Inlet study area (Source: PLOS ONE).

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