Case Study: Surveying aqueous CO2 in the field

Case Study: Surveying aqueous CO<sub>2</sub> in the field

Measuring CO2 in the Cow Bay River Watershed, Nova Scotia. Carbon dioxide (CO2) is an important, well-known greenhouse gas that has been studied extensively. As methodologies and sampling technologies improve, researchers are able to develop a fuller understanding of carbon dioxide dynamics and their response to climate change, allowing for more robust climate model predictions. […]

Seasonal lags and biophysical insights into soil CO2 efflux

Seasonal lags and biophysical insights into soil CO<sub>2</sub> efflux

Soil respiration is responsible for up to 90% of terrestrial ecosystem CO2 emissions to the atmosphere — yet the complex nature of the soil system means that soil respiration is one of the most poorly understood ecological processes. In order to better understand the drivers of soil respiration, Vargas et al. assembled a unique data […]

Opportunistic study of soil respiration in the wake of Hurricane Wilma, in a seasonally dry tropical forest

Opportunistic study of soil respiration in the wake of Hurricane Wilma, in a seasonally dry tropical forest

Initially setting out to study diurnal changes in soil CO2 concentrations in relation to soil temperature, Hurricane Wilma gave Vargas & Allen (2008) a very unique and unexpected opportunity to study how canopy recovery influences soil respiration and temperature after a large disturbance. The study site was a Seasonally Dry Tropical Forest (SDTF), on the […]

Belowground carbon dynamics: root and rhizomorph respiration!

Belowground carbon dynamics: root and rhizomorph respiration!

Plants use their fine roots and rhizomorphs for transporting nutrients and water at the soil-root interface. Rhizomorphs are strand-like entities made of fungal hyphae that grow on fine roots of plants. Together, the fine roots and rhizomorphs account for a large percentage of annual net primary productivity, however the mystery lies behind their respiration processes. […]

The multifaceted measurement of soil respiration

The multifaceted measurement of soil respiration

  Carbon sink or carbon source? Barron-Gafford et al. (2011) sought out to answer this question by measuring carbon dioxide fluxes in three different microhabitats (mesquites, bunchgrasses, and intercanopy soils) in Arizona (US), using solid state CO2 sensors. The study site is an area that is experiencing “woody encroachment”, where woody plants (e.g. mesquites) start […]

Cold desert biological soil crust community influences soil CO2 exchange

Cold desert biological soil crust community influences soil CO<sub>2</sub0> exchange

Cold deserts, like the Colorado Plateau, US are the understudied relatives of warm deserts (eg. Sonora desert, US) with respect to their carbon cycling dynamics. Most of the rain pulse events measured in the Canyonlands region (Colorado Plateau) were smaller than 5 mm. The biological soil crust (biocrusts) are an important community in these deserts, […]

Carbon export in boreal streams and catchment basins

Carbon export in boreal streams and catchment basins

Assessing carbon dioxide transport at the terrestrial-aquatic interface of the Krycklan catchment in north-west Sweden Northern latitude catchment basins are known to be important net sinks of carbon that vary greatly in space and time with respect to their carbon uptake. Leith et al. (2015) used high-frequency continuous non-dispersive infrared (NDIR) sensor measurements to look at […]