scholarly journals Natural regeneration of tree species in the understory of Corymbia citriodora in Florestal city, Minas Gerais, Brazil

2019 ◽  
Vol 3 (3) ◽  
pp. 106
Author(s):  
Laís Alvares Fonseca ◽  
Francisco de Assis Braga ◽  
Geanderson Santiago Fernandes
Keyword(s):  
Tree Species ◽  
Natural Regeneration ◽  
Basal Area ◽  
Minas Gerais ◽  
Forest Understory ◽  
Ecological Groups ◽  
Semideciduous Forest ◽  
Important Species ◽  
Dispersal Syndromes ◽  
Corymbia Citriodora

The natural regeneration of tree species in forested areas has been studied by several researches. This study aimed to evaluate the natural regeneration of tree species in Corymbia citriodora (Hook.) K. D. Hill & L. A. Johnson planted forest understory in Florestal, Minas Gerais, Brazil. Individuals with diameter at breast height (DBH) ≥ 5 cm were evaluated in seven 25 x 4 m plots randomly distributed. A phytosociological survey was carried out and the ecological groups and the dispersal syndromes of the regenerants were determined. We found 28 species belonging to 12 families, among which Fabacea and Annonaceae stood out. Density was 1,557 regenerants ha-1, and basal area was 23 m2 ha-1. The most important species were Psidium sp; Schefflera macrocarpa (Cham. & Schltdl.) Frodin; Pera  glabrata (Schott) Poepp. ex Baill.; Astronium fraxinifolium Schott & Spreng.; Matayba guianensis Aubl.; and Plathymenia reticulata Benth. We found 35% pioneer, 40% early secondary, 18% late secondary, and 7% climax species, of which 57% are zoochoric, 40% anemochoric, and 3% autochoric. It is concluded that the natural regeneration in the understory studied comprises typical species of the Seasonal Semideciduous Forest of the Atlantic Forest biome, presenting significant density and individuals from all ecological groups.The natural regeneration of tree species in forested areas has been studied by several researches. This study aimed to evaluate the natural regeneration of tree species in Corymbia citriodora (Hook.) K. D. Hill & L. A. Johnson planted forest understory in Florestal, Minas Gerais, Brazil. Individuals with diameter at breast height (DBH) ≥ 5 cm were evaluated in seven 25 x 4 m plots randomly distributed. A phytosociological survey was carried out and the ecological groups and the dispersal syndromes of the regenerants were determined. We found 28 species belonging to 12 families, among which Fabacea and Annonaceae stood out. Density was 1,557 regenerants ha-1, and basal area was 23 m2 ha-1. The most important species were Psidium sp; Schefflera macrocarpa (Cham. & Schltdl.) Frodin; Pera  glabrata (Schott) Poepp. ex Baill.; Astronium fraxinifolium Schott & Spreng.; Matayba guianensis Aubl.; and Plathymenia reticulata Benth. We found 35% pioneer, 40% early secondary, 18% late secondary, and 7% climax species, of which 57% are zoochoric, 40% anemochoric, and 3% autochoric. It is concluded that the natural regeneration in the understory studied comprises typical species of the Seasonal Semideciduous Forest of the Atlantic Forest biome, presenting significant density and individuals from all ecological groups.

Forest regeneration in northeastern Poland following a catastrophic blowdown

2015 ◽  
Vol 45 (9) ◽  
pp. 1172-1182 ◽  
Author(s):  
Dorota Dobrowolska
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Natural Regeneration ◽  
Large Scale ◽  
Stand Structure ◽  
Basal Area ◽  
Tree Height ◽  
Ground Cover ◽  
Species Structure ◽  
Tree Vitality

The aims of the investigation were to (i) quantify the changes in natural regeneration and stand structure, (ii) determine the role of deadwood in the process of regeneration following the disturbance, and (iii) determine the effect of disturbance severity on tree recruitment. The study was conducted in the Szast Protected Forest, which was established after a blowdown in 2002. The results showed that the trees were mainly wind-snapped. The basal area of the slightly disturbed stands increased over time. Herb cover increased, whereas moss cover decreased in 2011. The disturbance severity influenced the density of tree species regeneration, moss and herb ground cover, species diversity, average tree height, tree vitality, and damage caused by herbivores. The density of natural regeneration increased and new species became established after the disturbance. Scots pine (Pinus sylvestris L.) was the dominant tree species during the regeneration process except in the severely disturbed stand from which wood had been removed; in this case, birch was the dominant species. Wind disturbance increased species diversity and created a new forest with a particular species structure and trees that varied in age and height. The results of this study will be useful for foresters and policymakers to change the existing approaches to large-scale disturbances in the Polish forests.

scholarly journals Distribution of tree species in a geomorphological and pedological gradient of submontane semidecidual seasonal forest in the vicinity of Rio Doce state park, Minas Gerais

2012 ◽  
Vol 36 (4) ◽  
pp. 707-718 ◽  
Author(s):  
Priscila Bezerra de Souza ◽  
João José Lelis ◽  
Carlos Ernesto Gonçalves Reynaud Schaefer ◽  
Agostinho Lopes de Souza ◽  
João Augusto Alves Meira Neto
Keyword(s):  
Environmental Conditions ◽  
Tree Species ◽  
Acid Soil ◽  
Chemical Properties ◽  
Minas Gerais ◽  
Soil Survey ◽  
Soil Conditions ◽  
Semideciduous Forest ◽  
Topographic Gradient ◽  
Composite Samples

The objective of this study was to test the hypothesis that the distribution of tree species in a fragment of submontane seasonal semideciduous forest, a buffer zone in the Parque Estadual do Rio Doce, Minas Gerais, is influenced by geomorphological and weather and soil variables, therefore it can represent a source of information for the restoration of degraded areas where environmental conditions are similar to those of the study area. A detailed soil survey was conducted in the area by sampling three soil profiles per slope segment, totaling 12 profiles. To sample the topsoil, four composite samples were collected from the 10-20 cm layers in each topographic range totaling 16 composite samples. In the low ramp and the lower and upper concave slopes, the texture ranged from clay to sandy-clay. The soil and topographic gradient was characterized by changes in the soil physical-chemical properties. The soil in the 10-20 cm sampled layer was sandier, slightly more fertile and less acid in the low ramp than the clayer soil, nutrient-poor and highly acid soil at the top. The soil conditions in the lower and upper slope of the sampled layers, in turn, were intermediate. The P levels were limiting in all soils. The species distribution along the topographic gradient was associated with variations in chemical fertility, acidity and soil texture. The distribution of Pera leandri, Astronium fraxinifolium, Pouteria torta, Machaerium brasiliense and Myrcia rufipes was correlated with high aluminum levels and to low soil fertility and these species may be indicated for restoration of degraded areas on hillsides and hilltops in regions where environmental conditions are similar. The distribution of Pouteria venosa, Apuleia leiocarpa and Acacia polyphylla was correlated with the less acid and more fertile soil in the environment of the low ramps, indicating the potential for the restoration of similar areas.

scholarly journals Tree Species Composition and Natural Regeneration Status of Southeast Region of Bangladesh

2020 ◽  
Vol 5 (1) ◽  
pp. 27
Author(s):  
Abir Dey ◽  
Aklima Akther
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Natural Regeneration ◽  
Native Species ◽  
Basal Area ◽  
Conservation Strategies ◽  
Stem Density ◽  
Importance Value Index ◽  
Tree Species Composition ◽  
Large Trees

The study aimed to quantify and discuss the current condition of the tree species composition and natural regeneration of southeast parts of Bangladesh (Cox’s Bazar North Forest Division). A total of 121 stems having dbh ≥10cm and 3481 stems of regenerating tree species (dbh <10cm) per hectare were recorded. A large trees comprised of 17 species belonging to 10 families and 14 genera and 30 regenerating tree species belonging to 19 families and 27 genera have been found. The forests were highly non-uniform, with three or four species represented most of the stands. The values of diversity indices indicated limited plant diversity, which is dominated by two or three tree species. Stems of 10-30 cm dbh contributed almost 90% of the total stem density, whereas more than 80% of the total basal area still belonged to trees with dbh 100 cm or above. Dipterocarpus turbinatus was the most dominant species which have the highest Importance Value Index (IVI) with 135.82 and embodied 37.71% of the total stand density and 72.19% of total basal area. The study will provide scientific basis for the future implementation of forest conservation strategies in tropical forests of Southeast Asia, particularly in Bangladesh. This study may also pave the way to further research on regeneration potentials of the native species for conservation and enhancement of forests in future.

scholarly journals Slope variation and population structure of tree species from different ecological groups in South Brazil

2010 ◽  
Vol 82 (3) ◽  
pp. 643-652 ◽  
Author(s):  
Edmilson Bianchini ◽  
Cristina C. Garcia ◽  
José A. Pimenta ◽  
José M.D. Torezan
Keyword(s):  
Spatial Pattern ◽  
Tree Species ◽  
Size Structure ◽  
Riparian Forest ◽  
Basal Area ◽  
Ecological Groups ◽  
Forest Fragment ◽  
South Brazil ◽  
Canopy Species ◽  
Emergent Species

Size structure and spatial arrangement of 13 abundant tree species were determined in a riparian forest fragment inParaná State, South Brazil (23"16'S and 51"01'W). The studied species were Aspidosperma polyneuron Müll. Arg., Astronium graveolens Jacq. and Gallesia integrifolia (Spreng) Harms (emergent species); Alseis floribunda Schott, Ruprechtia laxiflora Meisn. and Bougainvillea spectabilis Willd. (shade-intolerant canopy species); Machaerium paraguariense Hassl, Myroxylum peruiferum L. and Chrysophyllum gonocarpum (Mart. & Eichler ex Miq.) Engl. (shade-tolerant canopy species); Sorocea bonplandii (Baill.) Bürger, Trichilia casaretti C. Dc, Trichilia catigua A. Juss. and Actinostemon concolor (Spreng.) Müll. Arg. (understory small trees species). Height and diameter structures and basal area of species were analyzed. Spatial patterns and slope correlation were analyzed by Moran's / spatial autocorrelation coefficient and partial Mantel test, respectively. The emergent and small understory species showed the highest and the lowest variations in height, diameter and basal area. Size distribution differed among emergent species and also among canopy shade-intolerant species. The spatial pattern ranged among species in all groups, except in understory small tree species. The slope was correlated with spatial pattern for A. polyneuron, A. graveolens, A. floribunda, R. laxiflora, M. peruiferum and T. casaretti. The results indicated that most species occurredin specific places, suggesting that niche differentiation can be an important factor in structuring the tree community.

scholarly journals Population structure and density of Attalea phalerata Mart. ex Spreng. (Arecaceae) in a semideciduous forest

2012 ◽  
Vol 36 (4) ◽  
pp. 637-645 ◽  
Author(s):  
Aelton Biasi Giroldo ◽  
André R. Terra Nascimento ◽  
Pedro Paulo Ferreira Silva ◽  
Gastão Viegas Pinho Júnior
Keyword(s):  
Population Structure ◽  
Distribution Pattern ◽  
Ecosystem Functioning ◽  
Natural Regeneration ◽  
Basal Area ◽  
Population Characteristics ◽  
Stable Population ◽  
Canopy Openness ◽  
Semideciduous Forest ◽  
Ontogenetic Stages

The structure of a population can be seen as the result of biotic and abiotic interacting forces. The studies of population characteristics are vital to improve the understanding of ecosystem functioning. In this study, we attempted to answer the two following questions: What are the population structure of Attalea phalerata? and Are there any influence of reproducers presence, canopy openness, declivity, basal area and soil coverage on recruitment of individuals in this population? We distinguished four ontogenetic stages in A. phalerata. Reproducers and virgins were sampled by using 25 plots (400 m²), juveniles and seedlings were sampled in sub-plots (100 m²). We found 2,328 Attalea phalerata individuals per hectare, first two ontogenetic stages accounted for 89.8% of the total, describing a relatively stable population. None of the analyzed factors were affecting the natural regeneration of Attalea phalerata in the fragment. The density and distribution pattern found for the population are probably signs of formation of oligarchic forests, moreover, the species seems to be able to colonize clearings and open areas.

scholarly journals Fitossociologia em fragmento de floresta estacional semidecidual em reserva legal no sudoeste do estado de Goiás

2021 ◽  
Vol 10 (2) ◽  
pp. e20710212383
Author(s):  
Ana Paula de Souza ◽  
Frederico Augusto Guimarães Guilherme ◽  
Pollyana de Godoy Borges ◽  
Daniele Aparecida Moreira Batista ◽  
Jéssica de Aguiar Pereira Soares ◽  
...  
Keyword(s):  
Conservation Status ◽  
Basal Area ◽  
Distribution Patterns ◽  
Diversity Indices ◽  
Ecological Groups ◽  
Importance Value ◽  
Human Disturbances ◽  
Semideciduous Forest ◽  
Breast Height ◽  
Seasonal Semideciduous Forest

In Goiás, seasonal forests structure studies are scarce, especially in fragments located in legal reserves, subject to human disturbances. Therefore, the study aimed to perform the phytosociology of a fragment of a rural property, in a seasonal semideciduous forest. We evaluated structure, richness, diversity, dispersion mechanisms, ecological groups, and species distribution patterns found in the study and floristic links between Cerrado, Amazon and Atlantic Forest. In a one-hectare sample plot, all live trees with a diameter at breast height ≥ 10 cm were measured. The values of density and basal area were 561 ind.ha-1 and 26.2 m².ha-1, respectively. We recorded 37 species with diversity indices (H’) of 2.36 and evenness (J’) of 0.65. Toulicia reticulata, Chaetocarpus echinocarpus, Bocageopsis mattogrossensis and Nectandra cuspidata were species with the highest importance value, corresponding to 69% and 65% of all density and basal area, respectively. Fabaceae obtained the highest floristic richness, with six species, although it was little represented in terms of abundance. Our results suggest that the fragment is a mature forest in good conservation status. This is reinforced by the high size of trees, in addition to the predominance of zoochoric (83.8%) and secondary (92.1%) individuals in the survey.

scholarly journals Evaluating Regeneration in Heterobasidion Root Disease Infested Stands in the Lake States

2019 ◽  
Vol 66 (2) ◽  
pp. 141-144
Author(s):  
Michael C Demchik ◽  
Monique L Sakalidis ◽  
Michael Hillstrom ◽  
Kyoko Scanlon ◽  
Trevor A Adams ◽  
...  
Keyword(s):  
Invasive Species ◽  
Tree Species ◽  
Natural Regeneration ◽  
Basal Area ◽  
Root Disease ◽  
Red Pine ◽  
Pine Plantations ◽  
Lake States ◽  
Overstory Trees

Abstract Heterobasidion root disease (HRD) infection is becoming increasingly common in red pine plantations of the Lake States. Although stump treatment can reduce rates of overland transmission, infested stands continue to experience expansion of mortality pockets. Natural regeneration into HRD mortality pockets can assist with revegetation. The objective of this study was to determine what tree species naturally regenerate in red pine plantations impacted by HRD in Wisconsin and Michigan. We visited 49 pockets (in 31 stands) in Wisconsin and Michigan that had existing confirmed HRD infections during the fall of 2017. We surveyed the regeneration in the pocket and measured the species and basal area of overstory trees 10 m from the expanding edge of the pocket. Overall, pockets were regenerating with desirable species, some of which are susceptible to HRD. Additionally, woody invasive species were present in 39 percent of the pockets. We expect these pockets to generally fill with desirable species of regeneration, although long-term successful regeneration by susceptible species such as pines may be limited.

scholarly journals Sinecological analysis of the montane rain forrest of Omiltemi, Guerrero

2017 ◽  
pp. 31
Author(s):  
Jorge Meave ◽  
Miguel Angel Soto ◽  
Luz María Calvo-Irabien ◽  
Horacio Paz-Hernández ◽  
Susana Valencia-Avalos
Keyword(s):  
Forest Structure ◽  
Tree Species ◽  
Basal Area ◽  
Floristic Composition ◽  
Abundant Species ◽  
Structural Features ◽  
Tropical Species ◽  
Mountain Forest ◽  
Eastern United States ◽  
Important Species

The floristic composition, structure, and texture of 1 ha of mesophytic mountain forest in Omiltemi, Guerrero, is described. With 138 species of vascular plants in the plot, this forest is very rich, with epiphytes, trees and herbs comprising the most diverse growth forms. The geographic affinities of this forest are diverse; many elements are shared with the andean-mesoamerican regions, and others are present in the deciduous forests of eastern United States. The Omiltemi forest is similar to other communities from western Mexico, and many of the endemic elements of this region occur in Omiltemi. This forest is structurally dense, approximately 24 m high, without a well-defined stratification. The canopy is made up mainly by Carpinus caroliniana and Quercus uxoris; Pinus ayacahuite is an emergent tree. The understory is rich in small-statured tree species. The horizontal distributions of the trees were analyzed, and only two understory species had a clumped pattern. Density is 2,096 trees/ha, total basal area is 49.82 m2/ha and cover is 263.8% The most important! species in the forest structure are those reaching the canopy. Two trends in the diametric structures of tree species populations were found: 1) with classes of small sizes having high frequencies, and gradually decreasing towards classes of larger sizes, and 2) with classes of intermediate sizes having lower frequencies than classes of smaller and larger sizes. The internal spatial variation of the forest structure was analyzed using multivariate methods. Tropical species were usually found in more humid places, while species of temperate affinities occurred in more exposed sites. Five floristic groups were recognized, and their associated structural features are described. This forest bears leaves throughout the year, although some of the most abundant species of the canopy are deciduous. The textural characteristics of pollination, dispersal and tree architecture are described. In addition, the mixed character of the mesophytic mountain forest of Omiltemi is discussed and related to its marginal geographic location.

scholarly journals Influence of environmental variables on the shrub and tree species distribution in two Semideciduous Forest sites in Viçosa, Minas Gerais, Brazil

2007 ◽  
Vol 56 (3) ◽  
Author(s):  
Sheila Isabel do C. Pinto ◽  
Sebastiao V. Martins ◽  
Nairam F. de Barros ◽  
Herly Carlos T. Díaz ◽  
Sustanis H. Kunz
Keyword(s):  
Species Distribution ◽  
Tree Species ◽  
Environmental Variables ◽  
Minas Gerais ◽  
Semideciduous Forest ◽  
Forest Sites

Climate resilience through natural regeneration in degraded natural forests of south-eastern hilly region of Bangladesh

2019 ◽  
Vol 48 (3) ◽  
pp. 417-425
Author(s):  
Md Khayrul Alam Bhuiyan ◽  
Md Akhter Hossain ◽  
Abdul Kadir Ibne Kamal ◽  
Mohammed Kamal Hossain ◽  
Mohammed Jashimuddin ◽  
...  
Keyword(s):  
Tree Species ◽  
Natural Regeneration ◽  
Diversity Indices ◽  
Acacia Auriculiformis ◽  
Quantitative Structure ◽  
Natural Forests ◽  
Climate Resilience ◽  
Hilly Region ◽  
Major Cluster ◽  
Ecological Dominance

A study was conducted by using 5m × 5m sized 179 quadrates following multistage random sampling method for comparative regenerating tree species, quantitative structure, diversity, similarity and climate resilience in the degraded natural forests and plantations of Cox's Bazar North and South Forest Divisions. A total of 70 regenerating tree species were recorded representing maximum (47 species) from degraded natural forests followed by 43 species from 0.5 year 39 species from 1.5 year and 29 species from 2.5 year old plantations. Quantitative structure relating to ecological dominance indicated dominance of Acacia auriculiformis, Grewia nervosa and Lithocarpus elegans seedlings in the plantations whereas seedlings of Aporosa wallichii, Suregada multiflora and Grewia nervosa in degraded natural forests. The degraded natural forests possess higher natural regeneration potential as showed by different diversity indices. The dominance-based cluster analysis showed 2 major cluster of species under one of which multiple sub-clusters of species exists. Poor plant diversity and presence of regenerating exotic species in the plantations indicated poor climate resilience of forest ecosystem in terms of natural regeneration.

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