scholarly journals Integrating climate, soil and stand structure into allometric models: An approach of site-effects on tree allometry in Atlantic Forest

2021 ◽  
Vol 127 ◽  
pp. 107794
Author(s):  
Vinicius Costa Cysneiros ◽  
Fernanda Coelho de Souza ◽  
Tatiana Dias Gaui ◽  
Allan Libanio Pelissari ◽  
Gabriel Agostini Orso ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Site Effects ◽  
Stand Structure ◽  
Tree Allometry ◽  
Allometric Models

scholarly journals Allometric Models for Estimating Tree Volume and Aboveground Biomass in Lowland Forests of Tanzania

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Wilson Ancelm Mugasha ◽  
Ezekiel Edward Mwakalukwa ◽  
Emannuel Luoga ◽  
Rogers Ernest Malimbwi ◽  
Eliakimu Zahabu ◽  
...  
Keyword(s):  
Aboveground Biomass ◽  
Site Specific ◽  
Tree Allometry ◽  
Allometric Models ◽  
Specific Biomass ◽  
Lowland Forests ◽  
Study Sites ◽  
Biased Estimates ◽  
Total Tree ◽  
Volume Models

Models to assist management of lowland forests in Tanzania are in most cases lacking. Using a sample of 60 trees which were destructively harvested from both dry and wet lowland forests of Dindili in Morogoro Region (30 trees) and Rondo in Lindi Region (30 trees), respectively, this study developed site specific and general models for estimating total tree volume and aboveground biomass. Specifically the study developed (i) height-diameter (ht-dbh) models for trees found in the two sites, (ii) total, merchantable, and branches volume models, and (iii) total and sectional aboveground biomass models of trees found in the two study sites. The findings show that site specific ht-dbh model appears to be suitable in estimating treeheightsince the tree allometry was found to differ significantly between studied forests. The developed general volume models yielded unbiased mean prediction error and hence can adequately be applied to estimate tree volume in dry and wet lowland forests in Tanzania. General aboveground biomass model appears to yield biased estimates; hence, it is not suitable when accurate results are required. In this case, site specific biomass allometric models are recommended. Biomass allometric models which include basic wood density are highly recommended for improved estimates accuracy when such information is available.

Modeling of tree height–diameter relationships in the Atlantic Forest: effect of forest type on tree allometry

2020 ◽  
Vol 50 (12) ◽  
pp. 1289-1298
Author(s):  
Vinicius Costa Cysneiros ◽  
Allan Libanio Pelissari ◽  
Tatiana Dias Gaui ◽  
Luan Demarco Fiorentin ◽  
Daniel Costa de Carvalho ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Linear Models ◽  
Forest Type ◽  
Tree Height ◽  
Local Environment ◽  
Forest Types ◽  
Mixed Effect ◽  
Tree Allometry ◽  
Specific Effects ◽  
Geographical Regions

Tree height is one of the most important variables for quantitative assessment of forest stocks, but it is difficult to directly measure. Such allometric relationships of trees can vary between geographical regions, however, mainly due to climatic, edaphic, and floristic gradients. Based on the hypothesis that different forest types influence the generic modeling of tree height–diameter relationships on geographical scales, this study aimed to (i) fit equations to estimate tree height in Atlantic Forest types in the state of Rio de Janeiro, Brazil; (ii) compare efficiency and precision between generic and specific equations for forest types; and (iii) test the effect of different forest types and species on the height–diameter relationship. Four allometric models were tested for all forests (generic) and three main forest types (specific). Effects of tree size, forest types, and species on tree height estimation were analyzed using multiple linear models and mixed-effect linear models. A significant effect of forest type and species on tree height was seen, showing the need to apply local specific equations to minimize the effects that are not captured by generic equations. Differences in tree allometry between forest types were associated with temperature, rainfall, soil, and forest structure. These results confirm the effect of the local environment on the height–diameter relationship of trees as found over large scales in tropical forests.

Allometry, adult stature and regeneration requirement of 65 tree species on Barro Colorado Island, Panama

2006 ◽  
Vol 22 (2) ◽  
pp. 123-136 ◽  
Author(s):  
Stephanie Bohlman ◽  
Sean O'Brien
Keyword(s):  
Growth Rate ◽  
Growth Rates ◽  
Stand Structure ◽  
Community Level ◽  
Barro Colorado Island ◽  
Diameter Growth ◽  
Tree Allometry ◽  
Level Analysis ◽  
Canopy Species ◽  
Adult Stature

This study provides a community-level analysis of how regeneration requirement and adult stature are related to tree allometry (diameter, height and crown size) throughout post-seedling ontogeny on Barro Colorado Island, Panama. Comparing 65 species, gap species are taller, have higher diameter growth rates and occupy more low-canopy sites (≤10 m canopy height) than shade species at small diameters (≤10 cm dbh). For trees >10 cm dbh, diameter-height relationships and growth rates no longer differ between gap and shade species, but shade species have larger, particularly deeper, crowns than gap species. Species with tall adult stature have more slender stems with larger crowns compared with treelet and mid-canopy species starting at 5 cm dbh. From 10 to 40 cm dbh, diameter growth rate is also significantly greater for tall species. The consistent allometric differences between functional groups on a community level will, in part, determine vertical and horizontal stand structure.

Site-effects on biomass allometric models for early growth plantations of Norway spruce (Picea abies (L.) Karst.)

2018 ◽  
Vol 116 ◽  
pp. 8-17 ◽  
Author(s):  
Ioan Dutcă ◽  
Richard Mather ◽  
Viorel N.B. Blujdea ◽  
Florin Ioraș ◽  
Mănăilă Olari ◽  
...  
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Site Effects ◽  
Early Growth ◽  
Allometric Models

Dereplication of Brazilian plants from Cerrado and Atlantic Forest using NMR virtual design and hyphenated techniques

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
I Castro-Gamboa ◽  
R Burgos ◽  
P Cardoso ◽  
F Carnevale ◽  
A Pilon ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Hyphenated Techniques ◽  
Virtual Design

Antioxidants from fruits and leaves of Eugenia jambolana, an edible Myrtaceae species from Atlantic Forest

Planta Medica ◽  
2006 ◽  
Vol 72 (11) ◽  
Author(s):  
DHS Silva ◽  
CV Plaza ◽  
V da S. Bolzani ◽  
AJ Cavalheiro ◽  
I Castro-Gamboa
Keyword(s):  
Atlantic Forest ◽  
Eugenia Jambolana

A New Species of Eugenia subg. Pseudeugenia (Myrtaceae, Myrteae) from Brazilian Atlantic Forest

2020 ◽  
Vol 45 (3) ◽  
pp. 537-543
Author(s):  
Karinne Sampaio Valdemarin ◽  
Jair Eustáquio Quintino Faria ◽  
Fiorella Fernanda Mazine ◽  
Vinicius Castro Souza
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Conservation Status ◽  
Forest Vegetation ◽  
Vegetation Types ◽  
Flower Buds ◽  
Diagnostic Features ◽  
Closely Related Species ◽  
Lowland Forests ◽  
A New Species

Abstract—A new species of Eugenia from the Atlantic forest of Brazil is described and illustrated. Eugenia flavicarpa is restricted to the Floresta de Tabuleiro (lowland forests) of Espírito Santo state and is nested in Eugenia subg. Pseudeugenia. Considering all other species of the subgenus that occur in forest vegetation types of the Atlantic forest phytogeographic domain, Eugenia flavicarpa can be distinguished mainly by the combination of smooth leaves with indumentum on both surfaces, with two marginal veins, usually ramiflorous inflorescences, pedicels 4.5‐9.7 mm long, flower buds 3.5‐4 mm in diameter, and by the calyx lobes that are 2‐3 mm long with rounded to obtuse apices. Morphological analyses were performed to explore the significance of quantitative diagnostic features between the new species and the closely related species, Eugenia farneyi. Notes on the habitat, distribution, phenology, and conservation status of Eugenia flavicarpa are provided, as well as a key for all species of Eugenia subg. Pseudeugenia from forest vegetation of the Atlantic forest phytogeographic domain.

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