Je suis stagiaire à l'agence nationale des parcs nationaux du gabon

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  • Armel THONGO/people/winstonasanteSam MooreCécile GirardinYadvinder Malhi

    I hope you are well. I wonder if there is a threshold (%) margin of error for that allometric equation is applicable to a forest type?
    Thank you and good day to all.

  • Fidèle EVOUNA ONDOEDZANG NDONG JosuéJoachim Dibakou

    Bonsoir a toute l'équipe de la Lopé,
    J'espère que la formation se passe bien et que tout le monde va bien. Je suppose que nous auront bientôt de grands experts en recherches des écosystèmes tropicaux.
    Bon courage, portez vous bien et salutation à tout le monde

  • Yadvinder Malhi

    Hello M.Yadvinder,
    I am very honored for the attention you paid to my concern. I actually recalculated me as you have indicated, but there are significant differences between the results of three equations.
    ex: Diameter (103.9Cm) Height (47.6m) it gives: Eq1 (17984.820), Eq2 (14166.752) and Eq 3 (17470.753)

      This is why I would like to know if there is a margin of error for each of these equations and what percentages.
    At what point can we consider an equation is applicable in a forest type?
    Thank you again for your clarification that you bring me, good day

  • Yadvinder Malhi/people/winstonasante

    Hello and I hope you're well. am currently in the process of comparing the results of estimates of carbon stocks using allometric equation 3, except that I see equation incorporating
    the diameter, height and density of the tree gives very different results (many Educated more) than the other equations. Is this normal? Thank you for your contribution and good day.
    Equation 1= 0,05*H*D2*d

    Equation 2=exp(-2.289 + (2.649* ln(D)) – (0.021*ln(D²)))

    Equation 3= (d*exp(-1.499+(2.148*ln(D)) + (0.207*ln(D)2 - (0.0281*ln(D)3))*0.001