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Terrestrial Carbon Cycle

The Arctic continues to warm at a rate that is currently twice as fast as the global average (see essay on Surface Air Temperature). Warming is causing normally frozen ground (permafrost) to thaw, exposing significant quantities of organic soil carbon to decomposition by soil microbes (Romanovsky et al. 2010, Romanovsky […]

Long-term drainage reduces CO2 uptake and increases CO2 emission on a Siberian floodplain due to shifts in vegetation community and soil thermal characteristics

With increasing air temperatures and changing precipitation patterns forecast for the Arctic over the coming decades, the thawing of ice-rich permafrost is expected to increasingly alter hydrological conditions by creating mosaics of wetter and drier areas. The objective of this study is to investigate how 10 years of lowered water […]

Decomposition of litter produced under elevated CO2: dependence on plant species and nutrient supply

We investigated the effect of CO2 concentration and soilnutrient availability during growth on the subsequent decomposition andnitrogen (N) release from litter of four annual grasses that differ inresource requirements and native habitat. Vulpia microstachys isa native grass found on California serpentine soils, whereas Avenafatua, Bromus hordaceus, and Lolium multiflorum areintroduced […]

leshyk illustration linking biogeochemistry

Linking Biogeochemistry and Microbial Community Chemistry

Overview The identities of organisms profoundly influence ecosystems, and microbial diversity is vast. The obvious disconnect between this diversity and its treatment in C cycling models is perhaps the best manifestation of the common complaint that so much physiology, taxonomy, ecology, and diversity is ignored when microbial communities are described […]

AGU Fall meeting logo

Ecoss presents research at the 2015 AGU fall meeting

Several Ecoss members presented at the 2015 AGU fall meeting. Topics ranged from permafrost C cycle responses to climate change,  to priming effects on soil C, to forest fires in the Arctic. Below you can find an overview of the presentations; click on the presentation title for more information at the AGU meeting page. […]

Virus bacteria cells as seen in a three-dimensional microscopic rendering.

Human Microbiome

Ecoss studies the microbial communities of the human body and the implications for disease including STDs and HIV, as well as analyzing the microbial community using bioinformatics, community ecology theory and Bayesian statistical modeling.