Coarse downed wood log survey (DP1.10010.001)

Coarse Downed Wood tallies are performed at least once at all sites at which logs greater than or equal to 2 cm diameter exist. Additional surveys are performed at 5 year intervals at each site if initial LIDS estimates of CDW volume are non-zero. Sampling occurs in n=20 randomly selected Distributed Plots at the site scale, and also in Tower Plots established within the airshed of the NEON Tower. Within each plot, 3 randomly oriented transects are established, and transect lengths vary dynamically by site according to F-values selected to enable tallying of 7-10 qualifying logs per plot. Tallied logs are parsed into three size categories (2-5 cm, 5-10 cm, and greater than 10 cm diameter), five decay categories that are broadly matchable to existing USFS definitions, and are identified to the highest taxonomic resolution possible according to the USDA Plants database. Instrumentation: