Inorganic carbon addition stimulates snow algae primary productivity

@article{Hamilton2017InorganicCA,
  title={Inorganic carbon addition stimulates snow algae primary productivity},
  author={Trinity L. Hamilton and Jeff R. Havig},
  journal={The ISME Journal},
  year={2017},
  volume={14},
  pages={857 - 860}
}
Earth has experienced glacial/interglacial oscillations accompanied by changes in atmospheric CO 2 throughout much of its history. Today over 15 million square kilometers of Earth’s land surface is covered in ice including glaciers, ice caps, and ice sheets. Glaciers are teeming with life and supraglacial snow and ice surfaces are often darkened by the presence of photoautotrophic snow algae, resulting in accelerated melt due to lowered albedo. Few studies report the productivity of snow algal… 

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References

SHOWING 1-10 OF 35 REFERENCES

The role of microbes in snowmelt and radiative forcing on an Alaskan icefield

A lack of liquid water limits life on glaciers worldwide but specialized microbes still colonize these environments. These microbes reduce surface albedo, which, in turn, could lead to warming and

Primary productivity of snow algae communities on stratovolcanoes of the Pacific Northwest

The first published values for carbon fixation rates of snow algae communities on glaciers in the Pacific Northwest are presented, and geochemical, isotopic, and microcosm data suggest these assemblages are not limited by phosphorus or fixed nitrogen availability.

Glacial/interglacial variations in atmospheric carbon dioxide

A version of the hypothesis that the whole-ocean reservoir of algal nutrients was larger during glacial times, strengthening the biological pump at low latitudes, where these nutrients are currently limiting is presented.

The biogeography of red snow microbiomes and their role in melting arctic glaciers

It is estimated that the overall decrease in snow albedo by red pigmented snow algal blooms over the course of one melt season can be 13%.

Experimental evidence that microbial activity lowers the albedo of glaciers

doi: 10.7185/geochemlet.1611 Darkening of glacier and ice sheet surfaces is an important positive feedback to increasing global temperatures. Deposition of impurities on glaciers is primarily

A germ theory for glacial systems?

Glacial systems in the form of glaciers and ice sheets are important actors in Earth's water cycle and climate. Improving our understanding of their structure and functionality is of considerable

Sierra Nevada, California, U.S.A., Snow Algae: Snow albedo changes, algal-bacterial interrelationships and ultraviolet radiation effects

In the Tioga Pass area (upper LeeVining Creek watershed) of the Sierra Nevada (California), snow algae were prevalent in the early summers of 1993 and 1994. Significant negative correlations were

Susceptibility of the early Earth to irreversible glaciation caused by carbon dioxide clouds

The authors' simulations of the early Earth, incorporating the possible formation of highly reflective CO2 clouds, suggest that the Earth might not be habitable today had it not been warm during the first part of its history.

Arctic Ocean Microbial Community Structure before and after the 2007 Record Sea Ice Minimum

Overall this layer of the Beaufort Sea has freshened and concentrations of nitrate, the limiting nutrient for photosynthetic production in Arctic seas, have decreased, suggesting that the microbial food webs are sensitive to physical oceanographic changes such as those occurring in the Canadian Arctic over the past decade.

Sedimentary challenge to Snowball Earth

Evidence from the magnetic field fossilized in sedimentary rocks suggests that, more than 600 million years ago, ice occupied tropical latitudes. A popular explanation for these findings, the