Estrutura da vegetação e distribuição espacial do Licuri, Syagrus ...

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deficit is greater in Senhor do Bonfim than in Jacobina. From the indexes used in the
aridity calculation, the model suggested by the United Nations Convention to Combat
Desertification (UNCCD) was the one that best characterized the climate of
municipalities Senhor do Bonfim (subhumid and dry) and Jacobina (subhumid and
humid). The areas presented different soil fertility. In the area of Senhor do Bonfim, the
soil is eutrophic (V ≥ 50%) and has higher levels of Ca, Mg, P and K than in Jacobina.
The soil in Jacobina shows high levels of aluminum and acidic pH, while in Senhor do
Bonfim, the soil pH tends to neutrality. The organic matter levels in both soils were low
from the agriculture point of view. In relation to the licuri distribution in areas of natural
vegetation and pasture in both municipalities, the occurrence of young plants was
observed in the areas of natural vegetation, which was not observed in the pasture
areas. In pasture areas, the variation in diameter and height of plants is very small and
all plants were found in the adult phase. The height of licuri plants was greater in
pasture areas; however, areas of natural vegetation presented plants with greater
height variability. In relation to the number of reproductive structures, it was observed
that in pasture areas, plants showed a higher number of reproductive structures when
compared to plants grown in areas of natural vegetation. In the area of natural
vegetation, licuri plants tend to cluster in both municipalities, while in pasture areas, its
distribution was uniform. In areas of natural vegetation, the large number of plants with
reduced diameter and height highlights the existence of a population under expansion
stage. A low diversity within the taxa was observed in the vegetation of both areas,
where the majority of genera in both areas had only one species. Caesalpinia
pyramidalis, Syagrus coronata, Cnidoscolus sp. 1 Rollinia leptopetala, and Jatropha
gossypiifolia were the species that had the greatest Importance Value in Senhor do
Bonfim. In Jacobina, species Acacia langsdorfii, Syagrus coronata, Acacia glomerosa,
Capparis jacobinae, Cnidoscolus sp. 1 and Croton sp. 1 stood out, showing therefore its
dominance in the population. The high distribution of Caesalpinia pyramidalis, Syagrus
coronata, Cnidoscolus sp. 1 Rollinia leptopetala, and Jatropha gossypiifolia in Senhor
do Bonfim and Acacia langsdorfii, Syagrus coronata, Acacia glomerosa, Capparis
jacobinae, Cnidoscolus sp. 1 and Croton sp. 1 in Jacobina may mean that they are
better adapted to soil of intermediate and low fertility. Syagrus coronata (Mart.) Becc.
showed high Importance Value for both areas, which demonstrates the successful
adaptation of this species to the environments where it lives. The Shannon - Weaver
diversity index was considered high for both areas when compared to other surveys