cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7515287
title: Electrical Conductivity Test in Batches of Schinus molle L. Seeds

description: ABSTRACT The objective of this study was to evaluate the efficiency of the electrical conductivity test to determine the physiological characteristics of lots of Schinus molle seeds. In the test, we used three lots of seeds stored for different periods of time, and evaluated two quantities of seeds and three volumes of water to obtain the soaking solution for subsequent reading of electrical conductivity. For conductivity, three volumes of water showed evidence of differences between the three lots for the two quantities of seeds. The lot with shorter storage period presented the lowest electrical conductivity and better physiological quality, confirming the results of the germination test. Thus the electrical conductivity test is efficient in differentiating batches of Schinus molle seeds, and it can be conducted at 25 °C, using 50 seeds soaked in 25 mL of water for 24 hours.
DOI: 10.6084/m9.figshare.7515287.v1
title: Electrical Conductivity Test in Batches of Schinus molle L. Seeds

description: ABSTRACT The objective of this study was to evaluate the efficiency of the electrical conductivity test to determine the physiological characteristics of lots of Schinus molle seeds. In the test, we used three lots of seeds stored for different periods of time, and evaluated two quantities of seeds and three volumes of water to obtain the soaking solution for subsequent reading of electrical conductivity. For conductivity, three volumes of water showed evidence of differences between the three lots for the two quantities of seeds. The lot with shorter storage period presented the lowest electrical conductivity and better physiological quality, confirming the results of the germination test. Thus the electrical conductivity test is efficient in differentiating batches of Schinus molle seeds, and it can be conducted at 25 °C, using 50 seeds soaked in 25 mL of water for 24 hours.
DOI: 10.6084/m9.figshare.7507148
title: Viability of Ocotea puberula (Rich.) Ness Seeds During Storage

description: ABSTRACT This study aimed to verify the DNA integrity and viability of Ocotea puberula seeds, with and without fruit, during storage. Seeds of five lots were stored, with and without fruit, in cold and dry chamber (40% ± 3% RH; 10 °C ± 2 °C) for 0, 3, 6, and 9 months. The following attributes were determined at each period: water content, germination potential (%), tetrazolium (%), and DNA integrity. Seed germination was conducted in germitest paper, in germinator at 30 °C under constant light. The tetrazolium test was performed in 0.5% solution for 1 hour. The DNA integrity of seeds was analyzed in agarose gel and DNA concentration was measured using a NanoDrop® spectrometer. The results showed that only seeds without fruit maintained germination for three months; after this period, the germination of seeds reduced gradually, becoming null after nine months. Seed degradation during storage was observed in the DNA integrity analysis. Ocotea puberula seeds, with or without fruit, stored in Kraft paper bags in cold and dry chamber had their viability and DNA integrity reduced after three months.
DOI: 10.6084/m9.figshare.7507148.v1
title: Viability of Ocotea puberula (Rich.) Ness Seeds During Storage

description: ABSTRACT This study aimed to verify the DNA integrity and viability of Ocotea puberula seeds, with and without fruit, during storage. Seeds of five lots were stored, with and without fruit, in cold and dry chamber (40% ± 3% RH; 10 °C ± 2 °C) for 0, 3, 6, and 9 months. The following attributes were determined at each period: water content, germination potential (%), tetrazolium (%), and DNA integrity. Seed germination was conducted in germitest paper, in germinator at 30 °C under constant light. The tetrazolium test was performed in 0.5% solution for 1 hour. The DNA integrity of seeds was analyzed in agarose gel and DNA concentration was measured using a NanoDrop® spectrometer. The results showed that only seeds without fruit maintained germination for three months; after this period, the germination of seeds reduced gradually, becoming null after nine months. Seed degradation during storage was observed in the DNA integrity analysis. Ocotea puberula seeds, with or without fruit, stored in Kraft paper bags in cold and dry chamber had their viability and DNA integrity reduced after three months.
DOI: 10.6084/m9.figshare.7514222
title: Vegetation Structure in Two Anthropic Fragments of Caatinga in Paraiba State, Brazil

description: ABSTRACT This study aimed to assess the floristic and structural differences between two contiguous fragments of Caatinga vegetation in Paraiba state, Brazil. To this end, 25 plots of 20 × 20 m were allocated in each area (A and B), and all individuals with circumference at soil level ≥ 10 cm and height ≥ 1 m were sampled. Area A: 2.226 individuals of 21 species, 21 genera and 11 families. Area B: 1.930 individuals of 17 species, 16 genera and 9 families. The Shannon-Wienner index and Pielou equability values were 1.92 nats/ind. and 0.63 (area A), and 1.76 nats/ind. and 0.62 (area B), respectively. The Sørensen’s similarity index between the areas was 79%. Poincianella pyramidalis, Mimosa tenuiflora, Aspidosperma pyrifolium, Croton blanchetianus, and Combretum leprosum were the richest species found in both areas. The floristic and structural parameters measured in both areas showed differences between them, most likely because of the different levels of anthropic intervention, which were larger in the B area.
DOI: 10.6084/m9.figshare.7514222.v1
title: Vegetation Structure in Two Anthropic Fragments of Caatinga in Paraiba State, Brazil

description: ABSTRACT This study aimed to assess the floristic and structural differences between two contiguous fragments of Caatinga vegetation in Paraiba state, Brazil. To this end, 25 plots of 20 × 20 m were allocated in each area (A and B), and all individuals with circumference at soil level ≥ 10 cm and height ≥ 1 m were sampled. Area A: 2.226 individuals of 21 species, 21 genera and 11 families. Area B: 1.930 individuals of 17 species, 16 genera and 9 families. The Shannon-Wienner index and Pielou equability values were 1.92 nats/ind. and 0.63 (area A), and 1.76 nats/ind. and 0.62 (area B), respectively. The Sørensen’s similarity index between the areas was 79%. Poincianella pyramidalis, Mimosa tenuiflora, Aspidosperma pyrifolium, Croton blanchetianus, and Combretum leprosum were the richest species found in both areas. The floristic and structural parameters measured in both areas showed differences between them, most likely because of the different levels of anthropic intervention, which were larger in the B area.
DOI: 10.6084/m9.figshare.7507445
title: Spatial Distribution and Vegetation Cover of Green Areas in Curitiba, Parana state, Brazil

description: ABSTRACT Vegetation in cities presents ecological, aesthetic and social functions that improve urban quality of life. However, quantitative and qualitative studies on the spatial distribution of green areas (GA) are needed to promote their efficiency. The aim of this study was to identify the vegetation cover present in different types of GAs in Curitiba, Parana state, and analyze the spatial configuration along the urban landscape. The vegetation cover was identified by means of the Decision Tree classification of high spatial resolution satellite images - GeoEye-1. The results show that Curitiba has less than 5% of its area composed of GAs, with most of them presenting vegetation coverage above 70%. The distribution of these GAs is uneven in quantity and irregular in disposal.
DOI: 10.6084/m9.figshare.7507445.v1
title: Spatial Distribution and Vegetation Cover of Green Areas in Curitiba, Parana state, Brazil

description: ABSTRACT Vegetation in cities presents ecological, aesthetic and social functions that improve urban quality of life. However, quantitative and qualitative studies on the spatial distribution of green areas (GA) are needed to promote their efficiency. The aim of this study was to identify the vegetation cover present in different types of GAs in Curitiba, Parana state, and analyze the spatial configuration along the urban landscape. The vegetation cover was identified by means of the Decision Tree classification of high spatial resolution satellite images - GeoEye-1. The results show that Curitiba has less than 5% of its area composed of GAs, with most of them presenting vegetation coverage above 70%. The distribution of these GAs is uneven in quantity and irregular in disposal.
DOI: 10.6084/m9.figshare.7519208
title: Thermomechanical Treatment and the Effects on the Properties of Simarouba amara (Aubl.)

description: ABSTRACT The pressure concentrated in a small group of tropical species necessitates greater investment in research and breeding techniques in lesser known species in an attempt directs them to multiple uses. This work aims to evaluate the influence of thermomechanical treatment on colorimetric properties and modulus of elasticity of timber marupá, in order to use it on the floor segment. The results showed a significant change with temperature effect on the color and the property of elasticity of wood. In general, an improvement in dynamic elastic modulus as the speed varied with each treatment shown, having lower values for the treatments with high pressure. The dark wood (lower L * values and higher values of a *) with application of temperature. The colors of wood marupá after treatments, combined with property of elasticity enhances this species as an option for the flooring industry.
DOI: 10.6084/m9.figshare.7519208.v1
title: Thermomechanical Treatment and the Effects on the Properties of Simarouba amara (Aubl.)

description: ABSTRACT The pressure concentrated in a small group of tropical species necessitates greater investment in research and breeding techniques in lesser known species in an attempt directs them to multiple uses. This work aims to evaluate the influence of thermomechanical treatment on colorimetric properties and modulus of elasticity of timber marupá, in order to use it on the floor segment. The results showed a significant change with temperature effect on the color and the property of elasticity of wood. In general, an improvement in dynamic elastic modulus as the speed varied with each treatment shown, having lower values for the treatments with high pressure. The dark wood (lower L * values and higher values of a *) with application of temperature. The colors of wood marupá after treatments, combined with property of elasticity enhances this species as an option for the flooring industry.
DOI: 10.6084/m9.figshare.7516202
title: Sampling Type Influence in the Estimation of Eucalyptus Wood Volume by Kriging

description: ABSTRACT The objective was to verify if the estimate of the individual volume of wood per tree conducted by kriging is influenced by the type of sampling. A settlement with 1875 eucalyptus trees was marked on a Cartesian plane (X, Y) and strictly cubed using the Smalian method. Six samples were taken, each containing 106 trees. Two samples per railing, two random samples and two by crowded grid. The semivariograms were constructed for each of the sampling and maps of the individual volume of trees were constructed by kriging. Eleven types of errors were compared and ranked. Random sampling showed the best results and clustered sampling grid showed the worst results.
DOI: 10.6084/m9.figshare.7516202.v1
title: Sampling Type Influence in the Estimation of Eucalyptus Wood Volume by Kriging

description: ABSTRACT The objective was to verify if the estimate of the individual volume of wood per tree conducted by kriging is influenced by the type of sampling. A settlement with 1875 eucalyptus trees was marked on a Cartesian plane (X, Y) and strictly cubed using the Smalian method. Six samples were taken, each containing 106 trees. Two samples per railing, two random samples and two by crowded grid. The semivariograms were constructed for each of the sampling and maps of the individual volume of trees were constructed by kriging. Eleven types of errors were compared and ranked. Random sampling showed the best results and clustered sampling grid showed the worst results.
DOI: 10.6084/m9.figshare.7508876
title: Resistance Mechanisms of Peltophorum dubium (Sprengel) Taubert Submitted to Flood Conditions

description: ABSTRACT Peltophorum dubium (Sprengel) Taubert seedlings were submitted to 60 days of flooding, with and without Ca+. During this period, growth, root anatomy and chlorophyll content were analyzed. The relative growth rates (RGR) of roots and shoots were higher in non-flooded plants. The flooded treatments, with and without Ca+, have affected the roots growth but did not affect the shoot and the stem diameter. The anatomy analysis showed thickening of the sclerenchyma in 15 and 60 days in the flooded treatments with and without Ca+, and the vessel diameter was smaller at 45 days. The chlorophyll content differed, however it was not statistically significant. The results indicate that Peltophorum dubium as candidate specie for reforestation in areas subjected to continuous flooding for up to 60 days, since no mortality was observed.
DOI: 10.6084/m9.figshare.7508876.v1
title: Resistance Mechanisms of Peltophorum dubium (Sprengel) Taubert Submitted to Flood Conditions

description: ABSTRACT Peltophorum dubium (Sprengel) Taubert seedlings were submitted to 60 days of flooding, with and without Ca+. During this period, growth, root anatomy and chlorophyll content were analyzed. The relative growth rates (RGR) of roots and shoots were higher in non-flooded plants. The flooded treatments, with and without Ca+, have affected the roots growth but did not affect the shoot and the stem diameter. The anatomy analysis showed thickening of the sclerenchyma in 15 and 60 days in the flooded treatments with and without Ca+, and the vessel diameter was smaller at 45 days. The chlorophyll content differed, however it was not statistically significant. The results indicate that Peltophorum dubium as candidate specie for reforestation in areas subjected to continuous flooding for up to 60 days, since no mortality was observed.
DOI: 10.6084/m9.figshare.7519094.v1
title: Landscape Ecology of a Watershed in the Brazilian Coastal Flat Lands

description: ABSTRACT This study aimed to quantify the land use and extract landscape metrics in the Piauitinga basin, SE, using satellite images with high spatial resolution. We used a RapidEye image with spatial resolution of five meters to map the land use and land cover. The landscape ecology metrics were calculated at the class level. In addition, simulations were performed to understand the edge effect for the remaining forest fragments. The basin presents a landscape dominated by pasture land (50.43%). Native vegetation represents the second largest class (23.79%), but is fragmented, with numerous small fragments showing a large edge effect. The increase in the edge distance reduces the central area, especially for fragments of the smallest size class, which indicates the establishment of ecological corridors.
DOI: 10.6084/m9.figshare.7519094
title: Landscape Ecology of a Watershed in the Brazilian Coastal Flat Lands

description: ABSTRACT This study aimed to quantify the land use and extract landscape metrics in the Piauitinga basin, SE, using satellite images with high spatial resolution. We used a RapidEye image with spatial resolution of five meters to map the land use and land cover. The landscape ecology metrics were calculated at the class level. In addition, simulations were performed to understand the edge effect for the remaining forest fragments. The basin presents a landscape dominated by pasture land (50.43%). Native vegetation represents the second largest class (23.79%), but is fragmented, with numerous small fragments showing a large edge effect. The increase in the edge distance reduces the central area, especially for fragments of the smallest size class, which indicates the establishment of ecological corridors.
DOI: 10.6084/m9.figshare.7518140
title: Soil Fauna as Indicator in Slope Forest Fragments

description: ABSTRACT The succession difference between forest fragments is reflected in soil fauna community, being an efficient bioindicator. The non-differentiation between thirds indicate that anthropogenic degradation occurs evenly throughout the extent of slope forest.
DOI: 10.6084/m9.figshare.7518140.v1
title: Soil Fauna as Indicator in Slope Forest Fragments

description: ABSTRACT The succession difference between forest fragments is reflected in soil fauna community, being an efficient bioindicator. The non-differentiation between thirds indicate that anthropogenic degradation occurs evenly throughout the extent of slope forest.
DOI: 10.6084/m9.figshare.7519067.v1
title: Effect of Site Quality and Thinning in Pine Yield

description: ABSTRACT An experiment in Pinus taeda stands was conducted aiming to evaluate the effect of thinnings and forest site quality on basal area (G), total volume, stem volume (v) and assortment of Pinus taeda. Thinnings occurred between 8 and 9 years old, where the fifth row plus 66%, 54%, 42%, 30% e 19% of the existing trees was cut. Thinnings were followed by measurement of diameters and along the stem to calculate its volume. An analysis of variance in randomized blocks was made adopting the sites as blocks and the mixed thinnings as treatments. Volumetric relation was modeled for the plots and from this, log assortments could be estimated using a software named SISPINUS. In conclusion, thinning affect the volumetric relation especially to larger trees, while its inclination curve reduces from richest sites to poorest sites. Sites exert greater effect than thinnings when considering basal area, total volume, boles volume and volume per assortment.
DOI: 10.6084/m9.figshare.7512581
title: Dendrometric, Physical and Chemical Properties Characteristics of Myracrodruon urundeuva and Leucaena leucocephala

description: ABSTRACT To evaluate dendrometric characteristics, physical and chemical properties of Myracrodruon urundeuva and Leucaena leucocephala was done suppression of five samples of each species. The dendrometric parameters evaluated were: DAP; height; volume. It was evaluated basic density and chemical analysis of wood were made. The experiment was arranged in a completely randomized design (DIC), with values analyzed by the test “F” at 5%. The species had a mean DAP 10.00; 14.08 cm; overall height 8.20; 12.93 m; commercial height 4.90; 10.07 m; volume shelled (C/C) 0.032; 0.104 m3; volume not shelled (S/C) 0.025; 0.095 m3 M. urundeuva and L. leucocephala, respectively. The M. urundeuva has a higher basic density. The ash content found in M. urundeuva was superior. Now, the total extractive content and holocelulose of M. urundeuva and L. leucocephala were similar. The L. leucocephala got higher total lignin content and higher calorific power. Therefore, the two species have good physical, chemical and energy characteristics.
DOI: 10.6084/m9.figshare.7512581.v1
title: Dendrometric, Physical and Chemical Properties Characteristics of Myracrodruon urundeuva and Leucaena leucocephala

description: ABSTRACT To evaluate dendrometric characteristics, physical and chemical properties of Myracrodruon urundeuva and Leucaena leucocephala was done suppression of five samples of each species. The dendrometric parameters evaluated were: DAP; height; volume. It was evaluated basic density and chemical analysis of wood were made. The experiment was arranged in a completely randomized design (DIC), with values analyzed by the test “F” at 5%. The species had a mean DAP 10.00; 14.08 cm; overall height 8.20; 12.93 m; commercial height 4.90; 10.07 m; volume shelled (C/C) 0.032; 0.104 m3; volume not shelled (S/C) 0.025; 0.095 m3 M. urundeuva and L. leucocephala, respectively. The M. urundeuva has a higher basic density. The ash content found in M. urundeuva was superior. Now, the total extractive content and holocelulose of M. urundeuva and L. leucocephala were similar. The L. leucocephala got higher total lignin content and higher calorific power. Therefore, the two species have good physical, chemical and energy characteristics.
DOI: 10.6084/m9.figshare.7519067
title: Effect of Site Quality and Thinning in Pine Yield

description: ABSTRACT An experiment in Pinus taeda stands was conducted aiming to evaluate the effect of thinnings and forest site quality on basal area (G), total volume, stem volume (v) and assortment of Pinus taeda. Thinnings occurred between 8 and 9 years old, where the fifth row plus 66%, 54%, 42%, 30% e 19% of the existing trees was cut. Thinnings were followed by measurement of diameters and along the stem to calculate its volume. An analysis of variance in randomized blocks was made adopting the sites as blocks and the mixed thinnings as treatments. Volumetric relation was modeled for the plots and from this, log assortments could be estimated using a software named SISPINUS. In conclusion, thinning affect the volumetric relation especially to larger trees, while its inclination curve reduces from richest sites to poorest sites. Sites exert greater effect than thinnings when considering basal area, total volume, boles volume and volume per assortment.
DOI: 10.6084/m9.figshare.7507295
title: Growth and Nutrition of Angico and Canafístula under Liming and Gypsum

description: ABSTRACT This study aimed to evaluate the effect of lime and gypsum application on the growth and nutrition of two leguminous trees. Treatments consisted of five rates of limestone, gypsum and a control treatment, with five replicates. Angico species (Anadanthera colubrina) and canafístula (Senna multijuga) were tested in a greenhouse experiment. Height and diameter were evaluated for a period of seven months. We evaluated the plants biomass, chemical composition, and number and dry weight of nodules on the roots. Lime increased pH, Ca2+ and Mg2+ content in soils, besides the neutralization of the Al3+. For Angico, basis saturation promoted the highest growth for canafístula it was 20%. Foliar nutritional content in the species, both, followed the order N&gt; Ca&gt; Mg&gt; K&gt; P. There were no correlations between plant growth and leaf content of nutrients.
DOI: 10.6084/m9.figshare.7512578
title: Nutrient Losses by Leaching in the Production of Australian Cedar Seedlings

description: ABSTRACT This study aimed to quantify nutrient losses by leaching in the production of Toona ciliata seedlings in different substrate associated with the use of mineral fertilizer. The experiment was conducted in a greenhouse in a completely randomized design with three replications, in factorial arrangement with two substrates (commercial substrate and swine manure compost) and four doses of mineral fertilizer (0; 3; 6 and 9 kg m-3). In the course of 105 days we evaluated losses of N, P and K by leaching and end of this period we quantified growth and quality of seedlings. The commercial substrate contributed with reduced loss of nutrients through leaching and when combined with mineral fertilizer showed higher growth potential and seedlings quality compared to the compound of swine manure.
DOI: 10.6084/m9.figshare.7512578.v1
title: Nutrient Losses by Leaching in the Production of Australian Cedar Seedlings

description: ABSTRACT This study aimed to quantify nutrient losses by leaching in the production of Toona ciliata seedlings in different substrate associated with the use of mineral fertilizer. The experiment was conducted in a greenhouse in a completely randomized design with three replications, in factorial arrangement with two substrates (commercial substrate and swine manure compost) and four doses of mineral fertilizer (0; 3; 6 and 9 kg m-3). In the course of 105 days we evaluated losses of N, P and K by leaching and end of this period we quantified growth and quality of seedlings. The commercial substrate contributed with reduced loss of nutrients through leaching and when combined with mineral fertilizer showed higher growth potential and seedlings quality compared to the compound of swine manure.