Agrobiodiversity in urban agroforestry systems from three municipalities at south Amazonas, Brazil

Abstract

Homegardens are considered a sustainable and high diverse land use. However, the Amazon
region still lacks studies about this agroecosystem. This work aimed to identify the floristic
composition and evaluate the diversity of urban homegardens. We sampled 41 homegadens
of different ages (<15, 15-30, 30-45, >45 years) in the municipalities of Labrea, Canutama, and
Eirunepé, south of Amazonas. We measured plant height and diameter at 1.30 m of the woody
vegetation. We analyzed the diversity through the Pielou’s Index (J) and Importance Value
(IV). We identified 130 species and 55 families. Among them, 42% are herbaceous species,
Psidium guava L. was the most frequent species in young homegardens (>15 years) and Mangifera
indica L. reached the highest value of IV 52% (> 45 years). Finally, our results showed
that urban homegardens with less than 15 years presented the highest diversity value than the
older ones.