I have mensurational data (dbh, crown height, tree height) of stands with up to 14 temperate broadleaves: (the most important being Quercus cerris, Quercus robur, Fraxinus ornus, Acer campestris, Carpinus betulus, Corylus avellana, Prunus avium) and I am interesting in species-specific modelling leaf area of trees.
I have no allometric equations for the stands, but when searching about it in literature, the majority of equations available focused on (total) above-ground mass. I am at least interested in leaf biomass. Can you help me?
Thank you.
If you are interested with only two variables, please use curve fit options in SPSS. It has more than ten model form. Based on R square value, you may concentrate on a few model form and proceed further.
Francesco,
If you cannot find equations for the species you mention, I would recommend using equations from the following paper:
Martin, JG; et al. 1998. Aboveground biomass and nitrogen allocation of ten deciduous southern Appalachian tree species. Canadian Journal of Forest Research 28: 1648-1659.
The paper has equations for foliage mass and foliage area. If I were you, I would use the equations for foliage mass and then do your own measurements of specific leaf area for each of the species you mention to convert to foliage area. The equations in the paper use only DBH in a log-log equation. I hope this helps.
Did you try this paper: http://www.metla.fi/silvafennica/full/smf/smf004.pdf?, it is an old one but has a extensive compilation of allometric equations for tree species.
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