Photo credit: Ken Williams
This is an active work space where I can display data visualizations that are not easily shared in documents. I update this section periodically as I come up with new innovative ways to visualize my science.
Tree by tree establishment of the Ordway-Swisher Forest Dynamics Plot. There are 144 - 40 x 40 m quadrats that were mapped across the 23.04 ha plot. Open circles are dead standing trees and filled points are live trees with all points scaled by the trees diameter and color coded by species.
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The above animations show the spread of fire through the forest dynamics plot at Ordway-Swisher. The fire was prescribed for this forest and took place over the course of only a few hours. The data come from thermocouples placed at known locations throughout the plot. We will be relating fire temperature to tree mortality in the plot. The left plot are the individual data logger locations and the right figure uses Voronoi polygons based on data logger locations and color-scaled by the natural log of the temperature at the sensor.
Watch self-thinning happen in experimental southern pine plantations in the animation to the left.
Self-thinning is a phenomena that happens in all plant populations due to space constraints.
As the average quadratic mean diameter (QMD) & Trees/acre reach densities where stands thin out due to competition. Note that both axes are on the log scale
One family (genetic line of pine tree species) thins much faster than others. (Hint: it is a different pine species than all the other families)
The size of each point is how much biomass that stand would have per acre.
Self-thinning is a phenomena that happens in all plant populations due to space constraints.
As the average quadratic mean diameter (QMD) & Trees/acre reach densities where stands thin out due to competition. Note that both axes are on the log scale
One family (genetic line of pine tree species) thins much faster than others. (Hint: it is a different pine species than all the other families)
The size of each point is how much biomass that stand would have per acre.
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Where and when did ForestGEO plots get established?
Each of the points represents a plot in the ForestGEO network and appears when the year was initially installed. The Global Forest Dynamics labs maintains two of the plots in this network and actively collaborates with almost all of them. See this paper for more info about the network or go to the ForestGEO website |