Dynamics of dry tropical forest after three decades of vegetation suppression
Tipo de material:
ArtigoAssunto(s): Recursos online:
Em: Floresta e Ambiente (Brazil) v. 26(3) p. 1-12; (2019)Sumário:
ABSTRACT
The aim of this study was to analyze the dynamics of the community and shrub-woody individuals
in a dry forest in the Brazilian semiarid region after 29 years of vegetation suppression. Individuals
with a circumference at 1.30 m above the ground (CBH) ≥ 6 cm were counted and their heights and
CBH were measured in 40 permanent plots on three monitoring occasions (2011, 2013 and 2015).
In the period between 2011 and 2015 the area presented a below average precipitation for the last
30 years. Phytosociological parameters and diversity were estimated. The density of individuals
decreased from 2011 to 2015 (p < 0.01) and the basal area was similar. During the monitoring
period, Poincianella bracteosa stood out in density, frequency and dominance. Phytosociological
changes were more evident for an interval of four years. After 29 years of vegetation suppression,
the community diversity is within the values for preserved semiarid (caatinga) vegetation. A long
period of drought was the main disturbance factor affecting vegetation dynamics.
Keywords: caatinga, density, diversity, dominance, frequency, monitoring.
| Tipo de material | Biblioteca atual | Coleção | Número de chamada | Informaçaõ do volume | Situação | Devolução em | Código de barras |
|---|---|---|---|---|---|---|---|
Periódicos
|
Biblioteca Nacional de Agricultura - Binagri Agrobase - Periódicos | Periódicos agrícolas | 2019 26(3) | Online | 2025-0451 |
Publicação on-line; Bibliography p. 9-12 (52 ref.); 5 tables; 2 illus.; Summary (En)
ABSTRACT
The aim of this study was to analyze the dynamics of the community and shrub-woody individuals
in a dry forest in the Brazilian semiarid region after 29 years of vegetation suppression. Individuals
with a circumference at 1.30 m above the ground (CBH) ≥ 6 cm were counted and their heights and
CBH were measured in 40 permanent plots on three monitoring occasions (2011, 2013 and 2015).
In the period between 2011 and 2015 the area presented a below average precipitation for the last
30 years. Phytosociological parameters and diversity were estimated. The density of individuals
decreased from 2011 to 2015 (p < 0.01) and the basal area was similar. During the monitoring
period, Poincianella bracteosa stood out in density, frequency and dominance. Phytosociological
changes were more evident for an interval of four years. After 29 years of vegetation suppression,
the community diversity is within the values for preserved semiarid (caatinga) vegetation. A long
period of drought was the main disturbance factor affecting vegetation dynamics.
Keywords: caatinga, density, diversity, dominance, frequency, monitoring.
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