File name : 
Data from plot-based measurements of CWD (Coarse woody debris) made at the KM 67 eddy-flux tower site, Tapajos National Forest, Brazil.  Date set includes different size class of debris measured in different plot sizes. Size class were: 2-10cm (in 64 m2 subplots) , 10-30cm(in 1600 m2 subplots), 30cm(in 38400 m2 subplots), standing (in entire 50m by 1000m transects).  Top, middle and bottom diameters and total length were measured for fallen CWD with either a large tree caliper or a small electronic caliper and dimensional measurements converted to volumes using Newton's formula for a cylinder (Harmon and Sexton 1996).  To calculate the volume of the standing CWD, the following taper function from Chambers et al. (2000) was used to calculate a top diameter from a DBH and an estimated height.
Top Diameter = 1.59 * DBH(cm) * (Height(m)*100(cm/m))-.091
The calculated top diameter and DBH were averaged to obtain a middle diameter and these three values were again converted to disk areas and entered into Newton's formula to calculate a volume (substituting height for length).  Volumes were converted to biomass with site-specific densities.  



Columns include: 
"T"				= transect
"Tag"			= if the piece was tagged, it appears here.  Only the largest pieces were tagged.     	             
"volume.cm3"	= volume calculated from measured dimensions.   
"decay"	= estimated decay class, based on Harmon & Sexton (1996):
Decay class 1 = solid wood, recently fallen, bark and twigs present. 
Decay class 2 = solid wood, significant weathering, branches present.
Decay class 3 = wood not solid, may be sloughing but nail still must be pounded into tree.
Decay class 4 = wood sloughing and/or friable, nails may be forcibly pushed into log.
Decay class 5 = wood friable, barely holding shape; nails may be easily pushed into log. 
"size"			= plot size
"biomass.keller.g"  = estimated biomass using locally measured densities, as 
				described in Rice et al. 2004.  



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