ANÁLISE DE AGRUPAMENTO BASEADO EM CARACTERÍSTICAS MORFOLÓGICAS DE LEGUMINOSAS DE VÁRZEA COM FINS TAXONÔMICOS

The objective of this study was to verify the feasibility of a taxonomic grouping of tree species in the lowland forest of the Leguminosae family through the morphometric characteristics of the fruit, seed and seedlings. The species selections for the analyzes were based on phytosociological studies carried out in the state of Amapá. Then, a bibliographic survey was carried out regarding the morphometric characteristics of fruit, seed and seedling for each species, available in scientific journals, in addition to consultations with exsiccates in the herbariums. Only 41 characters were used for cluster analysis, considering those most present among species. For the grouping, the Jaccard coefficient and the technique 1Laboratório de Análise de Sementes Florestais, Universidade do Estado do Amapá, Macapá, AP, Brasil. 2Laboratório de Manejo Florestal, Universidade do Estado do Amapá, Macapá, AP, Brasil. 3Laboratório de Manejo Florestal, Universidade do Estado do Amapá, Macapá, AP, Brasil. 4Laboratório de Análise de Sementes Florestais, Universidade do Estado do Amapá, Macapá, AP, Brasil. Acta Ambiental Catarinense – Unochapecó Soares et al., (2021) DOI: http://dx.doi.org/10.24021/raac.v18i1.5586 Vol. 18, N. 1 (2021) 269 of classification by means of groups (UPGMA) were used. The characteristics of fruits and seeds proved to be quite efficient in differentiating and classifying species at the level of subfamily and genus. The use of seedling characteristics in similarity analysis proved to be more efficient in studies considering the grouping at the level of genera following a previous standardization. Thus, it is understood that with the correct morphological description of species in natural environments, it is possible to carry out classification and differentiation analysis between genera or subfamilies, which ends up becoming a lowcost approach compared to studies that use genetic analysis.