Questions | Item’s groups | Indexes | Formulas |
---|---|---|---|
Use categories | Medicinal, food, handicraft, construction, fodder, dye, magic, fuel, veterinary, cosmetic | Use value | \(UVs = \sum {UV_{{is}} } {\raise0.7ex\hbox{${{\text{x}}^{1} }$} \!\mathord{\left/ {\vphantom {{{\text{x}}^{1} } {N_{s} }}}\right.\kern-\nulldelimiterspace} \!\lower0.7ex\hbox{${N_{s} }$}}\) UVis: the use value of the species s for an informant i and Ns the total number of persons interviewed for the species s \(UV_{{is}} = \sum {U_{{is}} } {\raise0.7ex\hbox{${{\text{x}}^{1} }$} \!\mathord{\left/ {\vphantom {{{\text{x}}^{1} } {N_{s} }}}\right.\kern-\nulldelimiterspace} \!\lower0.7ex\hbox{${N_{s} }$}}\) Ui: the number of uses mentioned by each informant for species, n: the total number of informants. [44] |
Organs exploited | Rootstock, root bark, leaf, stem, stem's bark, fruit, fibber, flower, seed | Index value of organ (IVO) | \(IVO = \sum {N_{{ui}} } {\raise0.7ex\hbox{${{\text{x}}^{1} }$} \!\mathord{\left/ {\vphantom {{{\text{x}}^{1} } {N_{{tu}} }}}\right.\kern-\nulldelimiterspace} \!\lower0.7ex\hbox{${N_{{tu}} }$}}\) Nui: the number of use patterns of each organ quoted by informants i and Ntu the total number of uses of all organs quoted by the informants N. [45] |
Commercial value | Yes/no | Index of commercial value (ICV) | \(ICV = I_{p} /I \times 100\%\) Ip: the number of informants answering positively to sell the species plant parts and I: the total number of informants questioned (adapted from Lozano et al. [13]) |
Species abundance | Density (Ni) | \(Ni = n_{i} /S\) Ni, the abundance in the plot i; ni, the number of individuals in the plot i,and S the area (1 ha) | |
Species dynamic | Increase, decrease, stable | Citation frequency (FC) | \(FC = N_{p} /N_{t} x100\%\) Np: the number of times a particular response was mentioned and Nt: the total number of informants questioned (adapted from Faruque et al. [46]) |
Harvesting modes | Axe, hoe, machete | ||
Conservation management practices | Seeding, assisted natural regeneration, partial harvest, fallowing areas, weeding protection |