@Article{CassolShimCarrMora:2018:ImTrHe,
author = "Cassol, Henrique Luis Godinho and Shimabukuro, Yosio Edemir and
Carreiras, Jo{\~a}o Manuel de Brito and Moraes, Elisabete Caria",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {University of
Sheffield} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Improved tree height estimation of secondary forests in the
Brazilian Amazon",
journal = "Acta Amazonica",
year = "2018",
volume = "48",
number = "3",
pages = "179--190",
month = "jul./set.",
keywords = "tree height-diameter (H:DBH) model, nested model, indicative
variable, height growth, ecological species groups.",
abstract = "This paper presents a novel approach for estimating the height of
individual trees in secondary forests at two study sites: Manaus
(central Amazon) and Santarem (eastern Amazon) in the Brazilian
Amazon region. The approach consists of adjusting tree
height-diameter at breast height (H:DBH) models in each study site
by ecological species groups: pioneers, early secondary, and late
secondary. Overall, the DBH and corresponding height (H) of 1,178
individual trees were measured during two field campaigns: August
2014 in Manaus and September 2015 in Santarem. We tested the five
most commonly used log-linear and nonlinear H:DBH models, as
determined by the available literature. The hyperbolic model: H =
a.DBH/(b+DBH) was found to present the best fit when evaluated
using validation data. Significant differences in the fitted
parameters were found between pioneer and secondary species from
Manaus and Santarem by F-test, meaning that site-specific and also
ecological-group H:DBH models should be used to more accurately
predict H as a function of DBH. This novel approach provides
specific equations to estimate height of secondary forest trees
for particular sites and ecological species groups. The presented
set of equations will allow better biomass and carbon stock
estimates in secondary forests of the Brazilian Amazon.",
doi = "10.1590/1809-4392201700844",
url = "http://dx.doi.org/10.1590/1809-4392201700844",
issn = "0044-5967",
language = "en",
targetfile = "cassol_improved.pdf",
urlaccessdate = "16 jun. 2024"
}