cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7514084
title: Soil Physical Quality Under Silvopastoral Management and Secondary Forest

description: ABSTRACT This study aimed to analyze the soil physical quality in a 20-year regenerating forest area (FS) in relation to an area under silvopastoral management during the same period with randomly spaced (SSP) native tree species. Samples were collected up to 60 cm deep to obtain soil water retention curves, density, total porosity, macroporosity, microporosity, mechanical penetration resistance (MPR) and the respective soil moisture at the time of collection. Soil density, mechanical resistance to penetration and total porosity were similar between the management systems. Microporosity was higher in FS than in SSP, leading to lower water storage capacity in the silvopastural system. The 20-year isolation of the silvopastoral system proved to be able to affect the soil water storage capacity due to changes in porosity, making its soils to reach similar values to natural forest.
DOI: 10.6084/m9.figshare.7514084.v1
title: Soil Physical Quality Under Silvopastoral Management and Secondary Forest

description: ABSTRACT This study aimed to analyze the soil physical quality in a 20-year regenerating forest area (FS) in relation to an area under silvopastoral management during the same period with randomly spaced (SSP) native tree species. Samples were collected up to 60 cm deep to obtain soil water retention curves, density, total porosity, macroporosity, microporosity, mechanical penetration resistance (MPR) and the respective soil moisture at the time of collection. Soil density, mechanical resistance to penetration and total porosity were similar between the management systems. Microporosity was higher in FS than in SSP, leading to lower water storage capacity in the silvopastural system. The 20-year isolation of the silvopastoral system proved to be able to affect the soil water storage capacity due to changes in porosity, making its soils to reach similar values to natural forest.
DOI: 10.6084/m9.figshare.7514087
title: Litterfall and Nutrient Dynamics in a Mature Atlantic Rainforest in Brazil

description: ABSTRACT We assessed litterfall and nutrient cycling in an old-growth Atlantic rainforest in southern Brazil. Plant litter collected monthly was separated into: leaves, twigs, reproductive organs, and fragments, and dried, weighed, and ground. Determination of carbon, nitrogen, phosphorus, potassium, calcium, magnesium, and sodium contents of different litter fractions was also performed. The total deposition was 8.44 Mg-1 ha-1 year-1, with a higher proportion of leaves fraction. Litterfall predominated in spring and summer, coinciding with the highest average temperature and rainfall in the study area. For leaves, twigs and fragments, the elements sequence of concentration was C&gt;N&gt;Ca&gt;K&gt;Mg&gt;P&gt;Na; whereas for reproductive organs it was C&gt;N&gt;K&gt;Ca&gt;Mg&gt;P&gt;Na. A higher concentration of nutrients was observed in spring and summer for the leaves fraction. The quantitative transfer of nutrients by litterfall fractions to the forest soil followed the same sequence observed for the concentration of nutrients.
DOI: 10.6084/m9.figshare.7514087.v1
title: Litterfall and Nutrient Dynamics in a Mature Atlantic Rainforest in Brazil

description: ABSTRACT We assessed litterfall and nutrient cycling in an old-growth Atlantic rainforest in southern Brazil. Plant litter collected monthly was separated into: leaves, twigs, reproductive organs, and fragments, and dried, weighed, and ground. Determination of carbon, nitrogen, phosphorus, potassium, calcium, magnesium, and sodium contents of different litter fractions was also performed. The total deposition was 8.44 Mg-1 ha-1 year-1, with a higher proportion of leaves fraction. Litterfall predominated in spring and summer, coinciding with the highest average temperature and rainfall in the study area. For leaves, twigs and fragments, the elements sequence of concentration was C&gt;N&gt;Ca&gt;K&gt;Mg&gt;P&gt;Na; whereas for reproductive organs it was C&gt;N&gt;K&gt;Ca&gt;Mg&gt;P&gt;Na. A higher concentration of nutrients was observed in spring and summer for the leaves fraction. The quantitative transfer of nutrients by litterfall fractions to the forest soil followed the same sequence observed for the concentration of nutrients.
DOI: 10.6084/m9.figshare.7514081
title: Effect of Trails on Litter Arthropods in the Tijuca National Park, Brazil

description: ABSTRACT The effect of trails on litter arthropod community in two tracks of the Tijuca National Park was analyzed. Samples of litter were collected at two altitudes (650 and 850 m.a.s.l.) and three distance classes (0, 5 and 10 m). Arthropods were identified on order level. There were 4491 sampled individuals of 19 taxa, and Orthoptera was the most frequent. There were significant differences in the number of taxon between tracks, possibly as a response to a causal effect of the structure and floristic composition of trails and quotes. The trail that showed the highest richness levels was Bico do Papagaio, differing from Pico da Tijuca. It is suggested that the differences may be related to the degree of disturbance that differentiated the two tracks. However, more detailed analysis can make clearer results.
DOI: 10.6084/m9.figshare.7514063
title: Determinants for a Forest Information System

description: ABSTRACT Determinants for a forest information system. This paper tests the relative importance of a group of pre-selected themes for the construction of a Forestry Information System for Brazil – BR-SIFLOR. The methodology that was used lies on a set of 12 thematic modules and 58 sub-themes in order to be evaluated by a group of people (holistic judging method). The information relates to: 1) Forest cover; 2) Production Forests; 3) Ownership of Forest Lands; 4) Forest-based Industry; 5) Forest Products Market; 6) Technology Products; 7) Forest Biological Diversity; 8) Climate Change and Forest; 9) Forest Economics and Statistics; 10) Forest Law; 11) Forest Certification; 12) Forestry Teaching and Research. We conclude that the key information to be included in the SIFLOR focus on themes of Forest Economy and Production.
DOI: 10.6084/m9.figshare.7514063.v1
title: Determinants for a Forest Information System

description: ABSTRACT Determinants for a forest information system. This paper tests the relative importance of a group of pre-selected themes for the construction of a Forestry Information System for Brazil – BR-SIFLOR. The methodology that was used lies on a set of 12 thematic modules and 58 sub-themes in order to be evaluated by a group of people (holistic judging method). The information relates to: 1) Forest cover; 2) Production Forests; 3) Ownership of Forest Lands; 4) Forest-based Industry; 5) Forest Products Market; 6) Technology Products; 7) Forest Biological Diversity; 8) Climate Change and Forest; 9) Forest Economics and Statistics; 10) Forest Law; 11) Forest Certification; 12) Forestry Teaching and Research. We conclude that the key information to be included in the SIFLOR focus on themes of Forest Economy and Production.
DOI: 10.6084/m9.figshare.7514081.v1
title: Effect of Trails on Litter Arthropods in the Tijuca National Park, Brazil

description: ABSTRACT The effect of trails on litter arthropod community in two tracks of the Tijuca National Park was analyzed. Samples of litter were collected at two altitudes (650 and 850 m.a.s.l.) and three distance classes (0, 5 and 10 m). Arthropods were identified on order level. There were 4491 sampled individuals of 19 taxa, and Orthoptera was the most frequent. There were significant differences in the number of taxon between tracks, possibly as a response to a causal effect of the structure and floristic composition of trails and quotes. The trail that showed the highest richness levels was Bico do Papagaio, differing from Pico da Tijuca. It is suggested that the differences may be related to the degree of disturbance that differentiated the two tracks. However, more detailed analysis can make clearer results.
DOI: 10.6084/m9.figshare.7506734.v1
title: Longitudinal Residual Strain of Eucalyptus Clone in Location Subject to Action of Winds

description: ABSTRACT During development and growth of trees, mechanical stresses are generated in order to keep it balanced and upright in response to various environmental factors. These efforts are known as growth stresses and can vary in distribution and intensity across different species of the genus Eucalyptus. Thus, the objective was to evaluate the longitudinal residual strains (LRS) and its correlations with tree growth features, physical and mechanical properties of the Eucalyptus urophylla × Eucalyptus grandis hybrid clones. Trees were 30 and 35 months old, located in forest plantations of Vale do Rio Doce, Minas Gerais, in areas subject to wind action, with damping effect and even the breaking of these trees. The LRS measured with extensometer was on average 0.086mm and when associated with other characteristics of the wood, the correlations were not significant. The growth characteristics of trees, basic density, modulus of elasticity (MOE) and modulus of rupture (MOR), and absorbed work were not enough to explain the LRS behavior.
DOI: 10.6084/m9.figshare.7514048
title: Content of Condensed Tannins Present in Mimosa tenuiflora Barks Based on the Phenophase

description: ABSTRACT The Mimosa tenuiflora, a typical species of the Brazilian semi-arid region, presents potential for production of vegetable tannins. This study aimed to evaluate the content of condensed tannins in the bark of Mimosa tenuiflora based on the plant phenophase. Thus, four collections were carried out according to the agricultural period, August and December of 2008, and April and August of 2009, at Lameirão Farm, Santa Terezinha, Paraiba, Brazil. Were collected 10 plants per period, totaling 40 plants, and evaluated the phenology and total solids content, Stiasny’s index and condensed tannins content in the bark by collection period. It was observed that the plants phenology affected the content condensed tannins, since trees with fruits and flowers showed lower tannins content. Plants with green leaves showed higher condensed tannins content.
DOI: 10.6084/m9.figshare.7506734
title: Longitudinal Residual Strain of Eucalyptus Clone in Location Subject to Action of Winds

description: ABSTRACT During development and growth of trees, mechanical stresses are generated in order to keep it balanced and upright in response to various environmental factors. These efforts are known as growth stresses and can vary in distribution and intensity across different species of the genus Eucalyptus. Thus, the objective was to evaluate the longitudinal residual strains (LRS) and its correlations with tree growth features, physical and mechanical properties of the Eucalyptus urophylla × Eucalyptus grandis hybrid clones. Trees were 30 and 35 months old, located in forest plantations of Vale do Rio Doce, Minas Gerais, in areas subject to wind action, with damping effect and even the breaking of these trees. The LRS measured with extensometer was on average 0.086mm and when associated with other characteristics of the wood, the correlations were not significant. The growth characteristics of trees, basic density, modulus of elasticity (MOE) and modulus of rupture (MOR), and absorbed work were not enough to explain the LRS behavior.
DOI: 10.6084/m9.figshare.7514048.v1
title: Content of Condensed Tannins Present in Mimosa tenuiflora Barks Based on the Phenophase

description: ABSTRACT The Mimosa tenuiflora, a typical species of the Brazilian semi-arid region, presents potential for production of vegetable tannins. This study aimed to evaluate the content of condensed tannins in the bark of Mimosa tenuiflora based on the plant phenophase. Thus, four collections were carried out according to the agricultural period, August and December of 2008, and April and August of 2009, at Lameirão Farm, Santa Terezinha, Paraiba, Brazil. Were collected 10 plants per period, totaling 40 plants, and evaluated the phenology and total solids content, Stiasny’s index and condensed tannins content in the bark by collection period. It was observed that the plants phenology affected the content condensed tannins, since trees with fruits and flowers showed lower tannins content. Plants with green leaves showed higher condensed tannins content.
DOI: 10.6084/m9.figshare.7511237
title: Social and Environmental Aspects of Pequi Marketing in Goiás

description: ABSTRACT The pequizeiro provides fruits traditionally used in cooking Goiás and regions of the Cerrado biome. Based on the pequi marketing analysis in CEASA-GO and local fairs (Ipameri and Pires do Rio, GO), this study assesses the importance of the species and threats related to extraction. The data revealed 12 micro-regions producing pequi in the state, being sold 5500 tons of pequi in 2011, with the box price ranging from 25 to 40 reais. The price paid in the fairs per liter in 2010 was five Brazilian Reais, with an increasing percentage of interested in the sale of non-timber product. The variation in the price paid to the pequi and changes producing regions in Goiás is noteworthy, in addition to the purchase of this product from other states. To meet the growing demand of pequi, it is suggested, besides the responsible extraction, planting the species in the cerrado, in orchards or agroforestry systems.
DOI: 10.6084/m9.figshare.7506731
title: Organic Matter Compartments from under Forest Soils in the Acre State

description: ABSTRACT This study aimed to quantify the different compartments of organic matter from under forest soils in Acre state. Soil profiles were described and sampled on shoulder, backslope and footslope landscape positions located in the counties of Sena Madureira, Manoel Urbano and Feijó, Acre state. Soils were characterized by chemically and physically attribute, humic and oxidizable fractions. The organic carbon is concentrated in the superficial soil horizons, highlighted by the sharp decrease in relation to other horizons. The clay and cations act more effectively on organic matter dynamics than the landscape position and soil class. Multivariate analyzes indicate high similarity between the sites of Sena Madureira (T1) and Feijó (T3), except the shoulder site from Feijó, which is similar to Manoel Urbano (T2).
DOI: 10.6084/m9.figshare.7511237.v1
title: Social and Environmental Aspects of Pequi Marketing in Goiás

description: ABSTRACT The pequizeiro provides fruits traditionally used in cooking Goiás and regions of the Cerrado biome. Based on the pequi marketing analysis in CEASA-GO and local fairs (Ipameri and Pires do Rio, GO), this study assesses the importance of the species and threats related to extraction. The data revealed 12 micro-regions producing pequi in the state, being sold 5500 tons of pequi in 2011, with the box price ranging from 25 to 40 reais. The price paid in the fairs per liter in 2010 was five Brazilian Reais, with an increasing percentage of interested in the sale of non-timber product. The variation in the price paid to the pequi and changes producing regions in Goiás is noteworthy, in addition to the purchase of this product from other states. To meet the growing demand of pequi, it is suggested, besides the responsible extraction, planting the species in the cerrado, in orchards or agroforestry systems.
DOI: 10.6084/m9.figshare.7506731.v1
title: Organic Matter Compartments from under Forest Soils in the Acre State

description: ABSTRACT This study aimed to quantify the different compartments of organic matter from under forest soils in Acre state. Soil profiles were described and sampled on shoulder, backslope and footslope landscape positions located in the counties of Sena Madureira, Manoel Urbano and Feijó, Acre state. Soils were characterized by chemically and physically attribute, humic and oxidizable fractions. The organic carbon is concentrated in the superficial soil horizons, highlighted by the sharp decrease in relation to other horizons. The clay and cations act more effectively on organic matter dynamics than the landscape position and soil class. Multivariate analyzes indicate high similarity between the sites of Sena Madureira (T1) and Feijó (T3), except the shoulder site from Feijó, which is similar to Manoel Urbano (T2).
DOI: 10.6084/m9.figshare.7506710
title: Effect of Spacing, Age and Irrigation on the Volume and Basic Density in Eucalyptus

description: ABSTRACT This study aimed to evaluate the influence of age, irrigation and spacing, on the volume and basic density of Eucalyptus wood. We used two clones of Eucalyptus grandis × Eucalyptus urophylla with age of six and twelve months, sowed in two regions, one irrigated and other unirrigated, with spacing of 3×0.5, 1.5×2, 3×1, 3×2 and 3×3 m. The volume was estimated according to the method of Smalian as well as the weighted density. The larger volume of wood per hectare values were obtained in the close spacing and irrigated region. Wider spacing showed higher specific gravity values timber for clone A; however, clone B didn’t change with spacing. The comparison of average density values for the clones in irrigated and non-irrigated areas, showed similar results in most studied spacings.
DOI: 10.6084/m9.figshare.7506710.v1
title: Effect of Spacing, Age and Irrigation on the Volume and Basic Density in Eucalyptus

description: ABSTRACT This study aimed to evaluate the influence of age, irrigation and spacing, on the volume and basic density of Eucalyptus wood. We used two clones of Eucalyptus grandis × Eucalyptus urophylla with age of six and twelve months, sowed in two regions, one irrigated and other unirrigated, with spacing of 3×0.5, 1.5×2, 3×1, 3×2 and 3×3 m. The volume was estimated according to the method of Smalian as well as the weighted density. The larger volume of wood per hectare values were obtained in the close spacing and irrigated region. Wider spacing showed higher specific gravity values timber for clone A; however, clone B didn’t change with spacing. The comparison of average density values for the clones in irrigated and non-irrigated areas, showed similar results in most studied spacings.
DOI: 10.6084/m9.figshare.7506716
title: Methods of Breaking Dormancy and Germination Substrates for Tachigali vulgaris L.G. Silva & H.C. Lima

description: ABSTRACT The knowledge of how forest species plantules stablish successfully is essential to comprehend the conditions involving dormancy surpass and their ideal germination substrates. The present study aims to define the most efficient methods to surpass dormancy and to test different substrates that influence T. vulgaris germination. The pre-germination tests applied in this study, in addition to the control test, were: mechanic scarification (sandpaper number 100), scissor tegument cut (opposite to the hilum), 24 hour immersion in water (80 °C), and a ten minutes sulfuric acid immersion. After the pre-germinative treatments the seeds were sown in different substrates, such as: vermiculite, sand and filter paper, all of them submitted to constant light in a controlled temperature of 30 °C. The best result treatment was the scissor cut associated with vermiculite substrate.
DOI: 10.6084/m9.figshare.7506716.v1
title: Methods of Breaking Dormancy and Germination Substrates for Tachigali vulgaris L.G. Silva & H.C. Lima

description: ABSTRACT The knowledge of how forest species plantules stablish successfully is essential to comprehend the conditions involving dormancy surpass and their ideal germination substrates. The present study aims to define the most efficient methods to surpass dormancy and to test different substrates that influence T. vulgaris germination. The pre-germination tests applied in this study, in addition to the control test, were: mechanic scarification (sandpaper number 100), scissor tegument cut (opposite to the hilum), 24 hour immersion in water (80 °C), and a ten minutes sulfuric acid immersion. After the pre-germinative treatments the seeds were sown in different substrates, such as: vermiculite, sand and filter paper, all of them submitted to constant light in a controlled temperature of 30 °C. The best result treatment was the scissor cut associated with vermiculite substrate.
DOI: 10.6084/m9.figshare.7506713.v1
title: Effect of Saw Pattern and Diametric Grades on the Yield in Lumber of Araucaria angustifolia

description: ABSTRACT This research was developed in order to assess the effect of aleatory breakdown and optimized breakdown systems of the logs of A. angustifolia, using different diametric classes to obtain lumber in a small sawmill. For this, 60 logs were selected, cubed and separated in three diameter classes, with 20 logs each, which were additionally divided in two lots of 10 logs, being the first lots subjected to aleatory breakdown, and the second for optimized breakdown. The results indicated that the optimized breakdown was satisfactory; in addition, the diametric classification caused an increase in yield lumber on both breakdown systems. The adjusted models for the yield prediction due to the taper of the logs were significant and satisfactory, especially in the optimized breakdown system that had high determination coefficients adjusted, regarding the aleatory breakdown system.
DOI: 10.6084/m9.figshare.7516820.v1
title: Dispersal and Characteristics of Myrceugenia euosma Fruit in Mixed Ombrophilous Forests, Southern Brazil

description: ABSTRACT This study aimed to characterize aspects related to propagules dispersion of Myrceugenia euosma (Myrtaceae) in a fragment of Mixed Ombrophillous Forest, Urupema, SC. For this, twenty-nine seed tree were evaluated for focal observation of visitors, propagules rain, removal and characterization of fruits. We recorded 140 visits of birds, occurring without preferential visit period. The species with higher visiting frequency and consumption of fruits were Zonotrichia capensis (Rufous-collared Sparrow) and Stephanophorus diadematus (Diademed Tanager), considered as potential dispersers. The frequency of collectors containing M. euosma propagules decreased with increased distance, presenting distinct behavior depending the type of propagule evaluated. We also found intact seeds in bird feces inside the collectors. The removal rate of fruits deposited on the ground was 22%, demonstrating that this is an important topic on the dispersal process and deserves attention in future studies.
DOI: 10.6084/m9.figshare.7506713
title: Effect of Saw Pattern and Diametric Grades on the Yield in Lumber of Araucaria angustifolia

description: ABSTRACT This research was developed in order to assess the effect of aleatory breakdown and optimized breakdown systems of the logs of A. angustifolia, using different diametric classes to obtain lumber in a small sawmill. For this, 60 logs were selected, cubed and separated in three diameter classes, with 20 logs each, which were additionally divided in two lots of 10 logs, being the first lots subjected to aleatory breakdown, and the second for optimized breakdown. The results indicated that the optimized breakdown was satisfactory; in addition, the diametric classification caused an increase in yield lumber on both breakdown systems. The adjusted models for the yield prediction due to the taper of the logs were significant and satisfactory, especially in the optimized breakdown system that had high determination coefficients adjusted, regarding the aleatory breakdown system.