scholarly journals Comparison between canopy trees and arboreal lower strata of urban semideciduous seasonal forest in Araguari - MG

2006 ◽  
Vol 49 (5) ◽  
pp. 775-783 ◽  
Author(s):  
João Paulo de Souza ◽  
Glein Monteiro Araújo ◽  
Ivan Schiavini ◽  
Polyana Custódio Duarte
Keyword(s):  
Floristic Similarity ◽  
Breast Height ◽  
Canopy Trees ◽  
Copaifera Langsdorffii ◽  
Semideciduous Seasonal Forest

The present study intended to determine the phytosociological characteristics of the tree elements on the lower strata and the canopy of a semideciduous seasonal forest. The trees (> 15 cm circumference at breast height) were sampled in 40 plots of 10m x 20m. The individuals in the lower strata (> 1m up to 15 cm of circumference in the base of the stem) were sampled in plots of 10m x 10m. Licania apetala and Micrandra elata obtained the first and second places in the two strata. Among the species with the highest value of importance on the canopy, Alchornea glandulosa, Pimenta pseudocaryophyllus, Copaifera langsdorffii, Heisteria ovata and Didymopanax morototoni presented a ratio of less than one individual in the lower strata when compared to the canopy. However, there was a high floristic similarity between the lower strata and the canopy.

scholarly journals Relações morfométricas para Copaifera langsdorffii (Desf.) Kuntze na região norte de Minas Gerais, Brasil

2020 ◽  
Vol 8 ◽  
pp. 01
Author(s):  
Caio Ferreira da Silva ◽  
Drauzio Correia Gama ◽  
Lais Almeida Araújo ◽  
Jean Barcello Xavier Bahia ◽  
Vinícius Orlandi Barbosa Lima
Keyword(s):  
Minas Gerais ◽  
Northern Region ◽  
Economic Importance ◽  
Crown Area ◽  
Crown Diameter ◽  
Breast Height ◽  
Great Economic Importance ◽  
Minas Gerais State ◽  
Copaifera Langsdorffii ◽  
Positive Correlations

Copaifera langsdorffii specie occurs throughout Brazil and is of great economic importance, mainly due to its production of oil-resin used for various pharmacological purposes. The objective of this study was to analyze the morphometric relationships in C. langsdorffii stand in northern region of Minas Gerais state, Brazil. Twenty trees were randomly sampled and were measured: stem circumference at 1.3 m height, total height (Ht) and crown diameter (CD). Morphometric indices were estimated. Correlations between dendrometric and morphometric variables were obtained through the Pearson matrix. The morphometric relations of crown proportion (CP), crown area (CA), formal of crown (FC), degree of slenderness (DS), salience index (SI), coverage index (CI) and vital space (VS) presented values of 15.26%, 25.06 m², 1.47, 16.35, 21.70, 0.47 and 7.01, respectively. Strong positive correlations were found in: diameter at breast height (DBH) in relation to CD and CA; Ht with crown proportion (CP) and DS; the formal of crown (FC) with the CI and VS, and between the CI and VS. The morphometric indices made it possible to understand the few magnitude of stand variation. The species can be characterized as facilitating management.

scholarly journals STRUCTURE AND FLORISTIC COMPOSITION IN A DENSE OMBROPHILOUS FOREST AREA UNDER FOREST MANAGEMENT

FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 793
Author(s):  
Yasmim Andrade Ramos ◽  
Bruno Aurélio Campos Aguiar ◽  
Marcos Vinicius Cardoso Silva ◽  
Renata Elaine Siqueira Matos ◽  
Maria Cristina Bueno Coelho ◽  
...  
Keyword(s):  
Forest Management ◽  
Diversity Index ◽  
Floristic Composition ◽  
Timber Production ◽  
Floristic Diversity ◽  
Forest Fragment ◽  
Floristic Similarity ◽  
Breast Height ◽  
Ombrophilous Forest ◽  
Dense Ombrophilous Forest

This study shows the phytosociology and floristics of a Dense Ombrophilous Forest fragment under forest management in Portel city, Pará State. Six conglomerates were sampled, divided into secondary and tertiary plots totaling 120 sample units of 0.4 hectares each, in which all trees with diameter at breast height (130 cm above ground; DBH) above 10 cm were measured. These individuals were botanically identified, and evenness and floristic similarity were calculated. There were 3,586 individuals distributed in 42 families, 121 genera, and 174 species. Families Fabaceae, Lecythidaceae, and Sapotaceae were the ones that obtained the highest IVI and the highest representativity of individuals. Species Eschweilera coriacea (DC.) S.A.Mori, Vouacapoua americana Aubl., and Tetragastris altissima (Aubl.) Swart were the ones with the highest IVI. Among the ten highest results, we highlight Syzygiopsis oppositifolia Ducke and Manilkara dardanoi Ducke, with great potential for timber production. The Shannon diversity index averaged 3.83 between the plots, and the Pielou evenness averaged 0.84, showing that the area presents high floristic diversity and great potential for forest management activities.

Pharmacokinetic study of a galloylquinic acid isolated from Copaifera langsdorffii Desf. leaves

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381 ◽  
Author(s):  
J de Carvalho da Costa ◽  
EV da Silva Motta ◽  
F Barreto ◽  
B Verlindo de Araujo ◽  
JK Bastos
Keyword(s):  
Pharmacokinetic Study ◽  
Copaifera Langsdorffii

American Canopy: Trees, Forests, and the Making of a Nation

2014 ◽  
Vol 32 (3) ◽  
pp. 338-339
Author(s):  
L. Smith
Keyword(s):  
Canopy Trees

Wachstum und Wertleistung der Douglasie in Abhängigkeit von der Standraumgestaltung

2012 ◽  
Vol 163 (3) ◽  
pp. 96-104 ◽  
Author(s):  
Joachim Klädtke ◽  
Ulrich Kohnle ◽  
Edgar Kublin ◽  
Andreas Ehring ◽  
Hans Pretzsch ◽  
...  
Keyword(s):  
Wood Quality ◽  
Volume Growth ◽  
Static Stability ◽  
Douglas Fir ◽  
Breast Height ◽  
Monetary Analysis ◽  
Starting Conditions ◽  
Tree Number ◽  
Clear Differentiation ◽  
Further Development

Growth and value production of Douglas-fir under varying stand densities The investigation is focused on the effects of initial tree number and thinning on growth and value performance of Douglas-fir stands. Data base is a coordinated Douglas-fir spacing experiment in South Germany, started 40 years ago and comprising variants of tree numbers with 500, 1,000, 2,000 and 4,000 Douglas-firs per hectare. The treatment was performed according to a standardized experiment program. The results show that at low initial tree numbers, the diameter on breast height (DBH) of (pre)dominant trees at the beginning of the observations (with 12 m top height) is bigger than at higher initial plant numbers. Accordingly, the quotient of height (H) to DBH (as an indicator for tree's static stability) is lower. The further development of DBH and H/DBH quotient is decisively determined by stand treatment, which superimposes the effect of the initial tree number. The total volume growth shows a clear differentiation, too, the variants with initially high tree numbers appearing on top. In the monetary analysis, this ranking is reversed: despite a supposed inferior wood quality, the variants with lower initial tree numbers clearly outperform the ones with higher numbers in terms of value. From these results, the following silvicultural recommendations for Douglas-fir can be derived: the initial tree numbers should be in the range from 1,000 to 2,000 plants per hectare. On technically not accessible sites, even lower tree numbers may come into question. The strong influence of stand treatment on DBH and H/DBH development highlights the problem of postponed thinnings, for this causes growth and stability losses even under favorable starting conditions in terms of competition.

scholarly journals Spatial Distribution of Lichens in Metrosideros excelsa in Northern New Zealand Urban Forests

Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 170
Author(s):  
Gladys N. Benitez ◽  
Glenn D. Aguilar ◽  
Dan Blanchon
Keyword(s):  
Spatial Distribution ◽  
Species Richness ◽  
New Zealand ◽  
Lichen Species ◽  
Positive Correlation ◽  
Breast Height ◽  
Lichen Community ◽  
The North ◽  
The City ◽  
Lichen Flora

The spatial distribution of corticolous lichens on the iconic New Zealand pōhutukawa (Metrosideros excelsa) tree was investigated from a survey of urban parks and forests across the city of Auckland in the North Island of New Zealand. Lichens were identified from ten randomly selected trees at 20 sampling sites, with 10 sites classified as coastal and another 10 as inland sites. Lichen data were correlated with distance from sea, distance from major roads, distance from native forests, mean tree DBH (diameter at breast height) and the seven-year average of measured NO2 over the area. A total of 33 lichen species were found with coastal sites harboring significantly higher average lichen species per tree as well as higher site species richness. We found mild hotspots in two sites for average lichen species per tree and another two separate sites for species richness, with all hotspots at the coast. A positive correlation between lichen species richness and DBH was found. Sites in coastal locations were more similar to each other in terms of lichen community composition than they were to adjacent inland sites and some species were only found at coastal sites. The average number of lichen species per tree was negatively correlated with distance from the coast, suggesting that the characteristic lichen flora found on pōhutukawa may be reliant on coastal microclimates. There were no correlations with distance from major roads, and a slight positive correlation between NO2 levels and average lichen species per tree.

scholarly journals Estimation of Genetic Parameters and Wood Yield Selection Index in a Clonal Trial of Korean Pine (Pinus koraiensis) in Northeastern China

2021 ◽  
Vol 13 (8) ◽  
pp. 4167
Author(s):  
David Kombi Kaviriri ◽  
Huan-Zhen Liu ◽  
Xi-Yang Zhao
Keyword(s):  
Selection Index ◽  
Tree Height ◽  
Stem Volume ◽  
Korean Pine ◽  
Branch Number ◽  
Basal Diameter ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
Stem Straightness ◽  
Clonal Trial

In order to determine suitable traits for selecting high-wood-yield Korean pine materials, eleven morphological characteristics (tree height, basal diameter, diameter at breast height, diameter at 3 meter height, stem straightness degree, crown breadth, crown height, branch angle, branch number per node, bark thickness, and stem volume) were investigated in a 38-year-old Korean pine clonal trial at Naozhi orchard. A statistical approach combining variance and regression analysis was used to extract appropriate traits for selecting elite clones. Results of variance analysis showed significant difference in variance sources in most of the traits, except for the stem straightness degree, which had a p-value of 0.94. Moderate to high coefficients of variation and clonal repeatability ranged from 10.73% to 35.45% and from 0.06% to 0.78%, respectively. Strong significant correlations on the phenotypic and genotypic levels were observed between the straightness traits and tree volume, but crown breadth was weakly correlated to the volume. Four principal components retaining up to 80% of the total variation were extracted, and stem volume, basal diameter, diameter at breast height, diameter at 3 meter height, tree height, and crown height displayed high correlation to these components (r ranged from 0.76 to 0.98). Based on the Type III sum of squares, tree height, diameter at breast height, and branch number showed significant information to explain the clonal variability based on stem volume. Using the extracted characteristics as the selection index, six clones (PK105, PK59, PK104, PK36, PK28, and K101) displayed the highest Qi values, with a selection rate of 5% corresponding to the genetic gain of 42.96% in stem volume. This study provides beneficial information for the selection of multiple traits for genetically improved genotypes of Korean pine.

scholarly journals Fenologia de três espécies arbóreas em um trecho de vegetação subcaducifólia no norte do Piauí, Brasil

Biotemas ◽  
2019 ◽  
Vol 32 (2) ◽  
pp. 33-44
Author(s):  
Antonio Maurício Silva Braga ◽  
Graziela De Araujo Lima ◽  
Mauro Sergio Teodoro ◽  
Jesus Rodrigues Lemos
Keyword(s):  
Copaifera Langsdorffii

A fenologia auxilia na compreensão da dinâmica dos ecossistemas florestais e é essencial para o estudo ecológico e evolutivo dos trópicos. Assim, torna-se necessário conhecer a periodicidade dos eventos vegetativos e reprodutivos para fornecer subsídios que auxiliem na complexa dinâmica dos ecossistemas. Considerando esses aspectos, foram realizadas observações quinzenais entre maio de 2015 a abril de 2016 de Copaifera langsdorffii Desf., Lecythis lurida Miers S.A.Mori e Swartzia flaemingii Raddi em um trecho de vegetação subcaducifólia no norte do Piauí. Nas três espécies, a queda foliar ocorreu na estação seca, com maior intensidade em setembro, seguida do brotamento, com o início da estação chuvosa, destacando-se entre maio e abril. Copaifera langsdorffii e L. lurida apresentaram a floração no final da estação chuvosa e início da estação seca, diferentemente de S. flaemingii, a qual apresentou floração no período chuvoso. A frutificação ocorreu em diferentes épocas do ano, com C. langsdorffii frutificando no período seco, enquanto L. lurida no final da estação chuvosa, assim como S. flaemingii, a qual se estendeu mais para o período seco. Este estudo permitiu descrever detalhes fenológicos da planta e suas relações com o ambiente, em diferentes períodos e locais, visando subsidiar estratégias para a implantação e o manejo dessas espécies. 

A Method of Access into the Crowns of Emergent and Canopy Trees

Biotropica ◽  
1978 ◽  
Vol 10 (2) ◽  
pp. 155 ◽  
Author(s):  
Donald R. Perry
Keyword(s):  
Canopy Trees
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