Tree Climbing Techniques and Volume Equations for Eschweilera (Matá-Matá), a Hyperdominant Genus in the Amazon Forest

Giménez, Bruno; Santos, Leandro Tavares dos; Gebara, Jonas; Celes, Carlos Henrique Souza; Durgante, Flávia Machado; Lima, Adriano José Nogueira; Santos, Joaquim dos; Higuchi, Níro

doi:10.3390/f8050154

Cited by 11 publications

(9 citation statements)

References 37 publications

(62 reference statements)

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“…S1 in Supplementary material), which do not cause physical damage to the trees (Laman 1995). This method is an alternative for obtaining tree volume data (Gimenez et al 2017), especially in the Atlantic Forest, where there are legal restrictions for cutting down trees. Remote Sensing Tools as Terrestrial Laser Scanning (TLS) are other alternatives to destructive techniques for assessing single-tree properties (Stoval et al 2018).…”

Section: Study Area and Data Collectionmentioning

confidence: 99%

“…3). Due to measurement difficulties and the increased cost of data collection, the use of single-predictor models with only diameter is an alternative for management operations in Brazilian dense forests (Gimenez et al 2017. Diameter is a variable easily measured in forest inventories (Segura & Kanninen 2005) that expand the applicability of single-pre-dictor models.…”

Section: Iforest -Biogeosciences and Forestrymentioning

confidence: 99%

“…Due to the destructive peculiarity of data collection (Gimenez et al 2017, volume prediction models are rare for the Atlantic Forest, where there are legal restrictions to cutting down trees. As the reliability of these estimates depends on the extent and range of available data (Akindele & LeMay 2006), the need to develop new local volume models is evident (Vibrans et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Tree volume modeling for forest types in the Atlantic Forest: generic and specific models

Cysneiros¹,

Gaui²,

Filho³

et al. 2020

iForest

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National Forest Inventories are important primary data sources for large-scale forest resource surveys, in which volume estimates of sampled trees are essential for quantitative analysis. Volume prediction models in natural forests are scarce in Brazil due to legal restrictions for cutting trees, especially in the Atlantic Forest. This study aimed to fit volume models for the main forest types and timber species of the Atlantic Forest in Rio de Janeiro state, considering two hypotheses: (I) generic volume models provide greater generalizability of estimates; however, (II) they may reduce the accuracy of forest typeand species-specific predictions. Four linear models with logarithmic transformation of variables were evaluated to fit volume models for generic and specific datasets, which correspond to the main forest types and timber species. Goodness-of-fit statistics were calculated to compare the accuracy and efficiency of the models, and selected models were validated through leave-oneout cross-validation procedures. The estimates obtained by generic and specific models were compared by non-parametric hypothesis tests. Generic models showed similar predictions to the specific models for forest types and timber species, with similar potential for stem and total volume predictions. Therefore, generic models can be used for Atlantic Forests in Rio de Janeiro state, while specific models are recommended to obtain more detailed local estimates.

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Section: Study Area and Data Collectionmentioning

confidence: 99%

Section: Iforest -Biogeosciences and Forestrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tree volume modeling for forest types in the Atlantic Forest: generic and specific models

Cysneiros¹,

Gaui²,

Filho³

et al. 2020

iForest

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“…Although it has been suggested that it is not feasible to accurately estimate tree height (Ht) in natural forests from the ground-level [55,78], our results suggest that laser-based electronic devices can and should be used to estimate Ht in natural forests [46,56,79,80]. For traditional inventories, tree climbing is often used to characterize vegetation structure in tropical forests [55,81,82], which typically results in an underestimation of total tree height as even a professional tree climber cannot easily reach the very top of a given tree. In contrast, we found that estimates obtained from laser-based electronic devices tend to overestimate Ht when compared to traditional forest inventory measurements (Figure 7).…”

Section: Performance Of Laser-based Electronic Devices For Analyzing mentioning

confidence: 84%

Performance of Laser-Based Electronic Devices for Structural Analysis of Amazonian Terra-Firme Forests

et al. 2019

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Tropical vegetation biomass represents a key component of the carbon stored in global forest ecosystems. Estimates of aboveground biomass commonly rely on measurements of tree size (diameter and height) and then indirectly relate, via allometric relationships and wood density, to biomass sampled from a relatively small number of harvested and weighed trees. Recently, however, novel in situ remote sensing techniques have been proposed, which may provide nondestructive alternative approaches to derive biomass estimates. Nonetheless, we still lack knowledge of the measurement uncertainties, as both the calibration and validation of estimates using different techniques and instruments requires consistent assessment of the underlying errors. To that end, we investigate different approaches estimating the tropical aboveground biomass in situ. We quantify the total and systematic errors among measurements obtained from terrestrial light detection and ranging (LiDAR), hypsometer-based trigonometry, and traditional forest inventory. We show that laser-based estimates of aboveground biomass are in good agreement (<10% measurement uncertainty) with traditional measurements. However, relative uncertainties vary among the allometric equations based on the vegetation parameters used for parameterization. We report the error metrics for measurements of tree diameter and tree height and discuss the consequences for estimated biomass. Despite methodological differences detected in this study, we conclude that laser-based electronic devices could complement conventional measurement techniques, thereby potentially improving estimates of tropical vegetation biomass.

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“…In the timber measurement (TM) stage, we measured the diameters and heights of 171 dead trees (naturally fallen, illegally exploited, and affected by forest fires) ( Figure 4). The selection of trees was based on the results from the forest inventory, observing the classical pattern of the negative exponential distribution of tree diameters in native forests in the Amazon [32][33][34]. Species identifications were confirmed by the Herbarium of INPA (see Supplementary Materials: Table S1).…”

Section: Data Collectionmentioning

confidence: 99%

Illegal Selective Logging and Forest Fires in the Northern Brazilian Amazon

Condé

Higuchi

Lima

2019

Forests

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Illegal selective logging and forest fires occur on a large scale in the northern Brazilian Amazon, contributing to an increase in tree mortality and a reduction in forest carbon stock. A total of 120 plots of 0.25 ha (30 ha) were installed in transitional ecosystems or ecotones (LOt) between the forested shade-loving campinarana (Ld) and dense-canopy rainforest, submontane (Ds), in the National Forest (Flona) of Anauá, southern Roraima. Measuring the diameters at breast height (DBH ≥ 10 cm) and the heights of 171 dead trees (fallen naturally, illegally exploited, and affected by forest fires), enabled the estimation of carbon content from the application of a biomass equation developed at Manaus, and the calculation of a correction factor, using the average height of the largest trees. From 2015-2017, we mapped the real extent of illegal selective logging and forest fires across the region with CLASlite and INPE/Queimadas. From measurements of 14,730 live and dead trees across 30 hectares (491 ± 15 trees·ha −1 ), the illegal selective logging and associated forest fires, and aggravation by severe El Niño droughts resulted in an 8.2% mortality of trees (40 ± 9 dead trees·ha −1 ) and a 3.5% reduction in forest carbon stock (6 ± 3 Mg·ha −1 ) in the short-term. The surface area or influence of forest fires of very high density were estimated in the south-central region of Roraima (8374 km 2 ) and the eastern region of the Flona Anauá (37 km 2 ). Illegal selective logging and forest fires in forest areas totaled 357 km 2 in the mosaic area, and 6 km 2 within Flona Anaua. Illegal selective logging and forest fires in the years of severe El Niño droughts threatened the maintenance of environmental services provided by Amazonian forests. selective logging with sustainable forest management or reduced-impact logging (RIL) focuses on the multiple use of timber and non-timber resources that are provided by forests, thereby preserving environmental services [9,11,12]. The long-term viability of the timber trade in the Brazilian Amazon depends on maintaining an adequate volume of legal timber extraction, whilst maintaining healthy forests [13]. Man's greed for the rapid and selective harvesting of high-value tropical timber as a commodity in the global marketplace has accelerated the loss of Amazonian habitats by deforestation and selective logging [2,7,14], with critical consequences for flora and fauna, and contributions to severe climate change.The indiscriminate use of fire by humans in areas of land-use conversion, from native forest to extensive ranching (cattle) and various agricultural uses, has contributed to an increase of burned areas inside and outside of the native forests of Roraima. The fuel of forest fires in Amazonia are residues that are left by illegal selective logging, fragmentation, and burned pastures [15,16]. In the past few decades, mega forest fires have been observed in the Amazon [3,17], specifically in Roraima [18][19][20], with strong interactions between the severity of El Niño droughts, and th...

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Tree Climbing Techniques and Volume Equations for Eschweilera (Matá-Matá), a Hyperdominant Genus in the Amazon Forest

Cited by 11 publications

References 37 publications

Tree volume modeling for forest types in the Atlantic Forest: generic and specific models

Tree volume modeling for forest types in the Atlantic Forest: generic and specific models

Performance of Laser-Based Electronic Devices for Structural Analysis of Amazonian Terra-Firme Forests

Illegal Selective Logging and Forest Fires in the Northern Brazilian Amazon

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