Author Archives: ncrawley

Global pattern of soil nitrogen stable isotope composition: Partitioning N loss by natural abundance. By Ning Dong

The natural abundance of δ15N has been widely in research on terrestrial nitrogen cycling. The variations of material’s stable isotopes composition in natural abundance due to the enzymatic preferences for light N (14N), especially during enzymatic kinetic processes, therefore isotope … Continue reading

Posted in Uncategorized | Leave a comment

Increasing vegetation light use efficiency in the high latitudes of the northern hemisphere. By Rebecca Thomas

In the high latitudes of the northern hemisphere (north of 45N), we have observed an increase in the amplitude of the seasonal cycle of CO2 of 5.0±0.8ppm over the last 50 years. In other words, vegetation exchanged 57±9.8% more CO2 … Continue reading

Posted in Uncategorized | Leave a comment

Optimality explains photosynthetic responses to elevation. By Wang Han

Alpine plants have long fascinated ecologists, and provide a rich variety of adaptations to extremes of low temperature, wind strength, and others stressors. But just one aspect of high-elevation environments is unique, namely the low atmospheric pressure. There has been … Continue reading

Posted in Uncategorized | Leave a comment

Mycorrhizal type as a primary control on the CO2 fertilization effect in nitrogen-limited ecosystems by Cesar Terrer Moreno

Terrestrial ecosystems sequester annually about a quarter of anthropogenic CO2 emissions, slowing climate change appreciably. The terrestrial carbon sink is generally attributed to the effect of increasing atmospheric CO2 concentrations via the CO2 fertilization effect” (CFE) on plant biomass. However, … Continue reading

Posted in Uncategorized | Leave a comment

T model – a simple carbon allocation model for tree growth Two case studies for both high and low [CO2] by Li Guangqi (Macquarie University)

Tree ring width is one of the most important materials for past climate reconstruction. However, “divergence” problem (correlation strength between temperature and ring width breaks where temperature was conferred as the limiting factors in high elevation and high latitude regions … Continue reading

Posted in Uncategorized | Leave a comment

How plants take heat from the environment? By Ning Dong

The leaves interact with the above physical environment in two ways: energy & mass exchange. From the biophysical control aspect, leaves can maintain their temperatures within a narrower range than ambient temperatures, which can be predicted by leaf energy balance … Continue reading

Posted in Uncategorized | Leave a comment

The Fertility Question: How do soil nutrients influence the carbon cycle? by Beni Stocker

A general notion of “soil fertility” is commonly left unaccounted for in models of the terrestrial biosphere and has received relatively little attention in carbon cycle science. This changed since the presentation of results by Vicca et al. (2012) and … Continue reading

Posted in Uncategorized | Leave a comment