New Web Posts
SPRUCE S1 Bog Fine-root Production and Standing Crop Assessed with Minirhizotrons in the Southern and Northern Ends of the S1 Bog
This data set reports fine-root peak growth and standing crop measurements from a forested, ombrotrophic bog as determined using non-destructive minirhizotron technology. Minirhizotron images were collected throughout the growing seasons of 2011 and 2012 at the southern and northern ends of the S1 bog across gradients of tree density in paired hummock and hollow microtopography. The dominant woody species in the bog, and focus of the investigation, were trees Picea mariana and Larix laricina, and ericaceous shrubs Rhododendron groenlandicum and Chamaedaphne calyculata.
SPRUCE Hollow Elevation Data for Experimental Plots Beginning in 2015
This data set provides hollow elevation data for the 17 SPRUCE experimental plots in the S1 bog on the Marcell Experimental Forest.
Hollows were selected for measurement by walking along each octagonal boardwalk segment in a plot and identifying where a hollow intersected the boardwalk. The vertical distance between the surface of the boardwalk (with a known elevation) and the surface of the hollow was measured and the absolute elevation (in meters amsl) of the hollow surface was calculated.
The hollow elevation measurements were carried out in October 2015, May 2016, and October 2016. These measurements will be repeated annually or more frequently.
SPRUCE Ecological Forecasting System
EcoPAD is an interactive Model-Experiment (ModEx) system that assimilates various data streams into models in a rigorous way to constrain model parameters and system states, improve ecological prediction, and quantify associated uncertainty. The system provides feedback to experimenters on which data sets are needed to further improve model predictions and to modelers on which parts of a model need to be improved.
Specifically, the system will (read more)
- Predict what ecosystems may respond to treatments once you selected a site and decide your experimental plan.
- Assimilate data you are collecting along your experiment to constrain model prediction.
- Project what ecosystem responses may likely be in the rest of your experiment.
- Tell you what are those important datasets you may want to collect in order to understand the system.
- Periodically update the projections.
- Improve the models, the data assimilation system, and your experiments during the process.
EcoLAB assimilates multiple streams of data from the SPRUCE experiment to the TECO model using MCMC algorithm, and then makes forecasts of ecosystem dynamics. Effects of warming and elevated [CO2] on carbon fluxes and pool sizes are forecast.
SPRUCE Whole Ecosystems Warming (WEW) Environmental Data Beginning August 2015
This data set provides the environmental measurements collected during the implementation of operational methods to achieve both deep soil heating (0-3 m) and whole-ecosystem warming (WEW) appropriate to the scale of tall-stature, high-carbon, boreal forest peatlands. The methods were developed to allow scientists to provide a plausible set of ecosystem warming scenarios within which immediate and longer term (one decade) responses of organisms (microbes to trees) and ecosystem functions (carbon, water and nutrient cycles) could be measured. Elevated CO2 was also incorporated to test how temperature responses may be modified by atmospheric CO2 effects on carbon cycle processes.