ombrophilous forest
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2022 ◽  
Vol 14 (2) ◽  
pp. 36
Author(s):  
Emanuel Arnoni Costa ◽  
Cristine Tagliapietra Schons ◽  
César Augusto Guimarães Finger ◽  
André Felipe Hess

Improving volumetric quantification of Parana pine (Araucaria angustifolia) in Mixed Ombrophilous Forest is a constant need in order to provide accurate and timely information on current and future growing stock to ensure forest management. Thus, the present study aimed to evaluate and compare the volume estimates obtained through Nonlinear Regression (NR), Genetic Algorithm (GA) and Simulated Annealing (SA) in order to generate accurate volume estimates. Volumetric equations were developed including the independent variables diameter at breast height (dbh), total height (h) and crown rate (cr) and from the fit through the NR, GA and SA approaches. The GA and SA approaches evaluated proved to be a reliable optimization strategy for parameter estimation in Parana pine volumetric modelling, however, no significant differences were found in comparison with the NR approach. This study therefore contributes through the generation of robust equations that could be used for accurate estimates of the volume of the Parana pine in southern Brazil, thus supporting the planning and establishment of management and conservation actions.


2021 ◽  
Vol 13 (1) ◽  
pp. 63-74
Author(s):  
Alexandre Dal Forno Mastella Alexandre ◽  
Mônica Moreno Gabira ◽  
Letícia Siqueira Walter ◽  
Rodrigo Condé Alves ◽  
Chaiane Rodrigues Scheider ◽  
...  

Contextualization: M. scabrella is a native tree species of the Brazilian Mixed Ombrophilous Forest, with a high ecological importance and economic potential. Knowledge gap:   There is a lack of information about the use of resources that favour the seedlings production of this species. Purpose: This study aimed to determine the most appropriate doses of controlled-release fertilizer (CRF) combined with the addition of remineralizer for production of M. scabrella seedlings. Methodology: Seedlings were produced using four doses of CRF (0, 4, 8, and 12 kg m-3) and four doses of remineralizer (0 %, 10 %, 20 %, and 30 %), in a 4 x 4 factorial scheme. At 180 days of seedling production, growth in height and stem diameter, shoot (SDB), root (RDB) and total biomass (TDB), and Dickson quality index (DQI) were evaluated. Results and conclusions: The use of remineralizer provided an increase in density and water retention capacity of substrates, as well as a reduction of macroporosity and total porosity. Combined with doses of 4 and 8 kg m-3, CRF contributed to the increase of biomass and DQI. The addition of 10 % remineralizer, associated with 4.0 kg m-3 CRF, provides adequate growth to produce M. scabrella seedlings. Above this percentage of remineralizer and CRF dose, species growth rate is reduced.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jannaina Velasques ◽  
Bruno do Amaral Crispim ◽  
Adrielle Ayumi de Vasconcelos ◽  
Miklos Maximiliano Bajay ◽  
Claudia Andrea Lima Cardoso ◽  
...  

AbstractSchinus terebinthifolia is a species native to different ecoregions in the Brazilian Atlantic Forest. The plant is listed on the National Relation of Medicinal Plants and recommended as phytomedicine, however while extractive exploitation prevails as the main route of raw material a significant variation of compounds will be detected. To assure the expansion of productive chain it is important to start by studying population diversity and chemical variations. We used SSR markers for studies of genetic structure among populations from dense ombrophilous forest (ES); the deciduous seasonal forest (SM); the savanna (DOU) and the sandbanks (ITA and MSP), and compared the results to their chemical profiles of essential oil. Genetic structure revealed differences among populations and significant fixation rates. Pairwise studies and Bayesian analysis showed similarities between ITA and SM and between DOU and MSP, proving that the patterns of distribution for the species do not follow the isolation by distance or similarity by environmental conditions. The comparison between PCA of genotypes and chemodiversity reinforces the unique profile for each population despite the environmental similarity observed and genetic analysis. The most divergent genotype and chemical group was found at the ombrophilous forest, strong evidence that we should undertake conservation efforts to prevent losses of biodiversity in that area.


FLORESTA ◽  
2021 ◽  
Vol 51 (4) ◽  
pp. 954
Author(s):  
Richeliel Albert Rodrigues Silva ◽  
Luciano Farinha Watzlawick ◽  
Henrique Soares Koehler ◽  
Fábio De Almeida Vieira ◽  
Fernanda Moura Fonseca Lucas ◽  
...  

With the occurrence of intensive climate change, there is a risk of irreversible damage to global biodiversity, resulting in reduction of geographical distribution and species extinction. The objective of this study was to evaluate the current distribution and the future projection of the areas of occurrence of Curitiba prismatica. Current occurrence data accessed in the SpeciesLink database and scientific studies were collected, which were correlated with the bioclimatic data available in WorldClim, for the current and future periods (2070), in the optimistic (RCP 4.5) and pessimistic scenarios (RCP 8.5) of the HadGEM2-ES model. In the current scenario, a species presents suitability restricted to mixed ombrophilous forest (MOF), with limited distribution to the center-south of the state of Paraná and the north of the state of Santa Catarina. For the future, there were reductions in the areas of climatic susceptibility for the species, both in the optimistic and pessimistic scenarios. In the RCP 4.5 scenario, the predictive reduction was found in the midwest region of Paraná, unlike the RCP 8.5 scenario, which showed a low reduction in this region. Therefore, in the future, areas with high suitability will tend to contract, but restricted to the regions of the first and second plateau of Paraná and the north of Santa Catarina. In this sense, these areas are indicated for commercial planting and in situ and ex situ conservation of the species.


Check List ◽  
2021 ◽  
Vol 17 (5) ◽  
pp. 1285-1290
Author(s):  
Román Carlos Ríos ◽  
Vinicyus Jorge Mordaski Visni da Cruz

We report the first occurrence of the family Triuridaceae in the Atlantic Forest of Paraná state, Brazil. We found Triuris hyalina Miers in a nature reserve and present a description, taxonomic and ecological comments, distribution data, and images. It is a small, mycoheterotrophic plant species. We found it in an area of dense ombrophilous forest in the municipality of Piraquara, eastern Paraná. Our new record represents the first of the family in the state and the southernmost known occurrence of the species. The new occurrence highlights the importance of floristic surveys to better understand the flora of the Atlantic Forest.


2021 ◽  
Vol 49 (131) ◽  
Author(s):  
Diego dos Santos Vieira ◽  
Karla Mayara Almada Gomes ◽  
Lizandra Elizeário dos Santos ◽  
Axa Emanuelle Simões Figueiredo ◽  
Bruno Oliveira Lafetá ◽  
...  

Author(s):  
Adriano Reis Prazeres Mascarenhas ◽  
Marta Silvana Volpato Sccoti ◽  
Rafael Rodolfo de Melo ◽  
Fernando Luiz de Oliveira Corrêa ◽  
Emanuel Fernando Maia de Souza ◽  
...  

FLORESTA ◽  
2021 ◽  
Vol 51 (3) ◽  
pp. 614
Author(s):  
Joselane Príscila Gomes Da Silva ◽  
Luiz Carlos Marangon ◽  
Ana Lícia Patriota Feliciano ◽  
Rinaldo Luiz Caraciolo Ferreira

The aim of this study was to evaluate the identification and floristic composition of seedlings of tree species, located in the soil seed bank of a remnant of the Dense Ombrophilous Forest of the Lowlands, in the Northeast of Brazil, from a morphofunctional ecology standpoint. A hundred and fifty two soil samples (0.2 m x 0.15 m x 0.05 m) were taken from a forest remnant, stored in polyethylene bags, identified and then taken to the Forest Nursery at the Federal Rural University of Pernambuco, where they were placed in polyethylene boxes under a 70% shade cloth and evaluated daily for a period of seven months. The seedlings emerged were photographed, separated into morphospecies, identified at the family and gender level and, when possible, at the species level. The density and absolute frequency, as well as the successional and morphological classification of the seedling cotyledons were estimated. In total, 1,577 seedlings of 31 morphospecies were cataloged. Melastomataceae was the family that presented the greatest richness, representing 48% of the species identified. The average density was 344.62 seeds.m-2, with higher densities for species of the family Melastomataceae, together with Maprounea guianensis and Cecropia palmata. There was a predominance of seedlings with epigeal and phanerocotylar germination, and with foliaceous cotyledons, corresponding to 93.56%. The seed bank was composed, predominantly, by pioneer species such as Cecropia palmata, Henriettea succosa, Miconia hypoleuca and Miconia tomentosa. Seedlings with epigeal germination, foliaceous and phanerocotylar cotyledons predominated for being easily established in more open areas.


FLORESTA ◽  
2021 ◽  
Vol 51 (3) ◽  
pp. 785
Author(s):  
Taíse Mariano Rodrigues ◽  
Tássio Dresch Rech ◽  
Cassiano Eduardo Pinto ◽  
Tiago Celso Baldissera ◽  
Fabio Cervo Garagorry ◽  
...  

The aciculated dry branches of Araucaria angustifolia, which fall throughout the year by the natural pruning of the species, can be a renewable and sustainable alternative for energy generation and income for rural producers inserted in the Mixed Ombrophilous Forest. This research aimed to energetically characterize these dry branches produced by free-growing trees throughout the year in the Santa Catarina's Plateau Region. Also, it aimed to determine the influence of weather conditions on the energetic quality of the aciculated dry branches. To that end, we demarcated 37 trees by choosing a quadrant according to the radius of the crowns in which the dry branches were collected. Collections happened monthly between June 2018 and May 2019. Subsequently, the biomass's physical, chemical, and energetic properties were determined. A simple correlation between climatic variables and properties was obtained. The main advantage of aciculated dry branches as an energy resource was their low moisture content (18%) and the disadvantages were the high ash content and the low basic density (220 kg.m-3). Except for the moisture content, all the properties of the aciculated dry branches varied throughout the year, and they were influenced by the weather variables. The correlations between the climatic variables and the properties analyzed indicated that the energetic quality of the dry branches was better in the months with the highest values of average temperatures and solar radiation.


Author(s):  
Alyne Regina Ruggiero ◽  
Lauri Amândio Schorn ◽  
Kristiana Fiorentin dos Santos ◽  
Tatiele Anete Bergamo Fenilli

This study evaluated changes in the structure for remnant Mixed Ombrophilous Forest recovering from logging, which ceased over 40 years ago. Regarding the dynamics of the floristic composition of natural regeneration, 18 species remained (23.38% of the total) and 27 new species entered (35.06% of the total). The greatest increases were observed for Allophylus edulis, Myrsine umbellata, and Miconia cinerascens. When analyzing the dynamics of regeneration in ecological groups, it was observed that pioneer species had a similar value in both surveys (29.4% and 29.6%); secondary species decreased from 56.6% to 52.8%, and late-successional species increased from 0.2% to 6.0%. Therefore, the forest fragment studied is in a healing phase after disturbance, characterized by the increased regeneration of pioneer species as a result of sufficient light entering the interior of the forest.


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