@Article{XaudMartSant:2013:TrFoDe,
author = "Xaud, Haron Abrahim Magalh{\~a}es and Martins, Flora da Silva
Ramos Vieira and Santos, Jo{\~a}o Roberto dos",
affiliation = "Brazilian Agricultural Research Corporation, Embrapa Roraima, PO
Box 133, Boa Vista, RR 69.301-970, Brazil; National Institute For
Space Research, INPE, PO Box 515, S{\~a}o Jos{\'e} dos Campos,
SP 12227-010, Brazil and National Institute For Space Research,
INPE, PO Box 515, S{\~a}o Jos{\'e} dos Campos, SP 12227-010,
Brazil and National Institute For Space Research, INPE, PO Box
515, S{\~a}o Jos{\'e} dos Campos, SP 12227-010, Brazil",
title = "Tropical forest degradation by mega-fires in the northern
Brazilian Amazon",
journal = "Forest Ecology and Management",
year = "2013",
volume = "294",
pages = "97--106",
keywords = "degraded forests, diversity, floristic compositions, forest fires,
ordination methods, deforestation, structure (composition), fires,
data set, disturbance, environmental degradation, forest fire,
forest soil, ordination, physiology, secondary succession, species
diversity, species evenness, species richness, tropical forest,
deforestation, fires, forest fires, Amazonas, Brazil.",
abstract = "In this study, we examine the degradation of tropical forests
caused by the forest fires of anthropogenic origin that have
frequently and intensely affected a large portion of the State of
Roraima (northern Brazilian Amazon), such as the one that occurred
in 1998 and extended over 12,000km2. In a region located in the
so-called {"} Arc of Fire{"} in the State, data from all
individuals with DBHe10cm were collected in 50 sample plots
(12.5ha). These plots were collected across five fire-degradation
levels (classes), from unaffected areas to areas affected by one,
two or three fires over 10years: 1998, 2003 and 2007. The
floristic and phytosociological quantitative parameters in the
analysis were as follows: species richness (defined classically
and by rarefaction), evenness, Shannon diversity index, mixture
coefficient, importance value (dominance, density and frequency),
basal area, diameter, total height and volume. In the full set of
plots, 5593 individuals were measured and identified in
177species/morphospecies and 53 families. We performed both
univariate (ANOVA and Tukey's test) and multivariate analyses
(ordination methods), aiming to find patterns of degradation by
fire. The results revealed that forests affected by one
low-intensity fire (BF1L) showed slight evidence of alteration in
comparison with forests that have not burned (UF), taking all
indicators evaluated into account. In extremely degraded forest
plots, the heavily impacted forests lose their primary-forest
characteristics, showing significant floristic and structural
changes and similarity to areas of young secondary succession.
Some aspects of these disturbances were observed not only in twice
or thrice-affected areas (BF2, BF3) but also in areas that
suffered from one high-intensity fire (BF1H). Given the observed
results, we ought to consider that an extensive {"}
secondarization{"} process caused by fire could plausibly reach
more forest areas in this part of the Amazon in the near future.",
doi = "10.1016/j.foreco.2012.11.036",
url = "http://dx.doi.org/10.1016/j.foreco.2012.11.036",
issn = "0378-1127",
label = "scopus",
language = "en",
targetfile = "Xaud et al 2013.pdf",
url = "http://dx.doi.org/10.1016/j.foreco.2012.11.036",
urlaccessdate = "15 jun. 2024"
}