Sentences with phrase «tundra soils»

The findings are important in the context of human - caused climate change, which is expected to increase nitrogen, and potentially nitrate, levels in tundra soil.

This likely explains why runoff from tundra soil to the Arctic Ocean — which other researchers have estimated totals 50 to 85 tons per year — accounts for half to two - thirds of total mercury input into the Arctic Ocean.

In the Arctic, it is deposited onto tundra soils and ultimately runs off into ocean waters, threatening the region's wildlife and people.

We calculated that it accounted for 70 percent of the mercury that finds its way into tundra soil.

Because of the very low nitrate levels found in arctic tundra soil, scientists had assumed that plants in this biome do not use nitrate.

This is a concern because atmospheric methane is 20 times more effective at retaining heat than CO2, and as tundra soils warm due to climate change even greater methane releases are expected.

Xue K, M Yuan M, J Shi Z, Qin Y, Deng Y, Cheng L, Wu L, He Z, Van Nostrand JD, Bracho R, Natali S, Schuur EAG, Luo C, Konstantinidis KT, Wang Q, Cole JR, Tiedje JM, Luo Y, Zhou J (2016) Tundra soil carbon is vulnerable to rapid microbial decomposition under climate warming.Nature Clim.

Microbial functional diversity covaries with permafrost thaw - induced environmental heterogeneity in tundra soil — Mengting M. Yuan — Global Change Biology

Frozen tundra soils are one of the largest pools of organic carbon on the planet.

Our instrumentation included measurements of all major forms of mercury in all environmental compartments, including the atmosphere, snow, rain, plants, lichen, mosses, and tundra soils and permafrost.

For thousands of years, Arctic grasses, shrubs and other plants have removed carbon from the atmosphere and stored it in the tundra soil, where microbes feed on decomposing organic matter.

Since different microbial processes leave distinct isotopic fingerprints on nitrous oxide, the researchers also hoped to figure out the relative amounts of nitrous oxide emitted by different nitrogen - processing microbes in the tundra soils.

Treat CC, Wollheim W, M., Varner R, K., Bowden W, B. (2016) Longer thaw seasons increase nitrogen availability for leaching during fall in tundra soils.