scholarly journals VERTICAL STRUCTURE OF THE ARBOREAL COMPONENT UNDER REGENERATION PHASE OF A DECIDUOUS FOREST FRAGMENT, SANTA CATARINA STATE, BRAZIL

2016 ◽  
Vol 40 (5) ◽  
pp. 781-791
Author(s):  
Welington Kiffer de Freitas ◽  
Luis Mauro Sampaio Magalhães
Keyword(s):  
Natural Regeneration ◽  
Deciduous Forest ◽  
Floristic Composition ◽  
Total Density ◽  
Forest Fragment ◽  
Invasive Potential ◽  
Management Measures ◽  
Tree Communities ◽  
Regeneration Phase ◽  
Hovenia Dulcis

ABSTRACT The objective of this study was to evaluate the structure (horizontal and vertical) of a Deciduous Forest, located between the municipalities of Piratuba and Ipira (SC). 14.000 m2 of tree communities were analyzed, sub- divided into 14 plots of 10 x 100 m, where all individuals with DBH equal to or greater than 4.0 cm were sampled and identified. For natural regeneration were sampled 560 m2, divided into 14 plots of 10 x 4 m. In the tree strata were sampled 2.125 individuals belonging to 34 families, 80 genera and 113 species with a total density of 1.517 ind.ha-1. Natural regeneration were sampled 196 individuals belonging to 24 families and 49 species with a total density of 3.500 ind. ha-1. Luehea divaricata Mart., Actinostemon concolor (Spreng) Müll. Arg. and Parapiptadenia rigida (Benth.) Brenan had of value of increased importance (7,1%, 7,0 % and 5,3%, respectively). Actinostemon concolor got high value Relative Natural Regeneration (18,1%). The low percentage of natural regeneration of species as Luehea divaricata and Parapiptadenia rigida, respectively 3,7% and 1,5%, typical of EDF , may represent a maintenance commitment in the community. The study revealed the presence of exotic species with invasive potential, as Hovenia dulcis Thumb. These facts point to the importance of the adoption of management measures, since the forest fragment studied is advancing successional terms, however, anthropogenic interference with signals in the floristic composition. These facts point to the importance of the adoption of management measures, since the forest fragment studied is suffering anthropogenic impact, influencing the ecological succession mechanisms.

Monitoring of natural regeneration in a mixed deciduous forest

1999 ◽  
Vol 64 ◽  
Author(s):  
K. M. Tabari ◽  
N. Lust
Keyword(s):  
Survival Rate ◽  
Natural Regeneration ◽  
Deciduous Forest ◽  
Seedling Stage ◽  
Permanent Plots ◽  
Soil Conditions ◽  
Growing Seasons ◽  
Humus Layer ◽  
Beech Stand ◽  
Regeneration Phase

Monitoring  of natural regeneration in a dense semi-natural mixed hardwood forest on the  base    of ash, beech, oak and sycamore occurred over 3 years in the Aelmoeseneie  experimental    forest, Belgium. 40 permanent plots (4 m x 5 m) were selected in three  various humus types,    located in an ash stand and in an oak - beech stand. In all plots abundance  and top height of all    broad leaved regenerated species were determined at the end of the growing  seasons 1995 and    1998. In addition, the seedlings which appeared in the plots during 1996  and 1997 were    identified and followed up.    This study proves that in the investigated sites natural regeneration is  drastically poor and    diversity is low, in particular where the humus layer is more acidic (mull  moder) and the litter    layer is thick. No regeneration phase older than the seedling stage (h <  40 cm) is developed on    the different humus types. On average, total number of seedlings in 1995  amounts to 38    units/are in the ash stand and to 63 units/are in the oak - beech stand.  Survival rate over a 3-    year period is 37% and 42% respectively in the ash and oak - beech stands.  Total ingrowth    during the growing seasons 1996 and 1997 is virtually poor, indicating 16  and 8 units/are    respectively in above mentioned stands. Survival rate of occurring  seedlings, as well as the ingrowth of new seedlings are notably different (P < 0.05) according to the soil conditions of the    ash stand. Generally, the low presence of seedlings and the lack of  regeneration older than the    seedling stage reveal that the regeneration development encounters with a  critical problem. The    continuation of this process would likely result in a progressive  succession by the invasive and    the unwanted tree species.

scholarly journals CARACTERIZAÇÃO FLORÍSTICA E ESTRUTURAL DE UM FRAGMENTO DE FLORESTA OMBRÓFILA MISTA, EM CURITIBA, PR – BRASIL

FLORESTA ◽  
2002 ◽  
Vol 32 (1) ◽  
Author(s):  
Rubens Marques Rondon Neto ◽  
Carina Kozera ◽  
Regina do Rocio De Andrade ◽  
Adriana Trippia Cecy ◽  
Ana Paula Hummes ◽  
...  
Keyword(s):  
Diversity Index ◽  
Floristic Composition ◽  
Total Density ◽  
Araucaria Angustifolia ◽  
Forest Fragment ◽  
Importance Value ◽  
Important Species ◽  
Casearia Sylvestris ◽  
Index Value

O presente trabalho teve como objetivo conhecer a composição florística e a estrutura dos indivíduos arbóreos com DAP ³ 5cm presentes em um fragmento de Floresta Ombrófila Mista (Floresta com Araucária), denominado “Capão do Tigre”, situado em Curitiba - PR. Em dezoito parcelas de 10 x 20m foram inventariados 710 indivíduos, distribuídos em 77 espécies, pertencentes a 36 famílias e 55 gêneros. O valor do índice de diversidade Shannon para as espécies foi de 3,437. A densidade total estimada foi de 1.972 indivíduos/ha e os valores médios de DAP e altura encontrados foram 11,6 cm e 8,2 m, respectivamente. De acordo com o parâmetro valor de importância ampliado, as espécies mais importantes foram Casearia sylvestris, Allophylus edulis, Luehea divaricata, Araucaria angustifolia, Cupania vernalis, Ocotea corymbosa, Ocotea nutans, Jacaranda puberula, Mollinedia clavigera e Solanum sanctae-catharinae. FLORISTIC AND STRUCTURAL CHARACTERIZATION OF A FRAGMENT OF MIXED OMBROPHYLOUS FOREST IN CURITIBA, PR - BRAZIL Abstract The aim of this paper was to know the floristic composition and the structureof a Mixed Ombrophylous Forest fragment (Araucaria Forest), named “Capão do Tigre”, situated in Curitiba - PR. It was inventoried 710 trees individuous in eighteen 10 x 20 m plots with DBH ³ 5cm, distributed in 77 species from 55 gender and 36 families. The Shannon diversity index value was 3,437 for the species. The total density found was 1.972 individuous/ha, and the medium DBH and height was 11,6 cm and 8,2 m, respectively. Acording to the parameters of Amplieted Importance Value, the most important species are: Casearia sylvestris, Allophylus edulis, Luehea divaricata, Araucaria angustifolia, Cupania vernalis, Ocotea corymbosa, Ocotea nutans, Jacaranda puberula, Mollinedia clavigera e Solanum sanctae-catharinae.

scholarly journals Species Turnover across Different Life Stages from Seedlings to Canopy Trees in Swamp Forests of Central Brazil

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Clarissa G. Fontes ◽  
Bruno M. T. Walter ◽  
José Roberto R. Pinto ◽  
Gabriel Damasco
Keyword(s):  
Natural Regeneration ◽  
Species Turnover ◽  
Floristic Composition ◽  
Life Stages ◽  
Swamp Forest ◽  
Central Brazil ◽  
Plant Life ◽  
Adult Trees ◽  
Tree Communities ◽  
Adult Tree

Processes driving the assembly of swamp forest communities have been poorly explored. We analyzed natural regeneration and adult tree communities data of a swamp gallery forest in Central Brazil to discuss the role of ecological filters in shaping plant species turnover in a successional gradient. Species data of 120 plots were used to assess species turnover between natural regeneration and adult tree communities. Our analyses were based on 4995 individuals belonging to 72 species. Community patterns were discerned using ordination analyses. A clear floristic turnover among plant life stages was distinguished. Regeneration community of swamp forests was richer in species composition than the adult community. Tree species commonly found in nonflooded gallery forests were present in the regeneration plots but not in the adult community. Differences in the floristic composition of these two strata suggest that not all species in the seedling stage can stand permanent flooding conditions and only a few tolerant species survive to become adult trees. We propose that natural disturbances play an important role by altering limiting resources, allowing seeds of nonflooded forest species to germinate. This paper elucidates the turnover between plant life stages in swamp forests and suggests mechanisms that may shape these communities.

scholarly journals Aspectos florístico e estrutural de um fragmento de floresta com araucária utilizado para o pastoreio de bovinos

2002 ◽  
Vol 24 (24) ◽  
pp. 77
Author(s):  
Luciano Farinha Watzlawick ◽  
Rubens Marques Rondon Neto ◽  
Marcos Vinícius Winckler Caldeira ◽  
Emerson Roberto Schoeninger
Keyword(s):  
Floristic Composition ◽  
Total Density ◽  
Forest Fragment ◽  
Municipal District ◽  
Tree Component

The aim of this paper was to know, analyze and describe the floristic composition of the shrub and tree component and the structure of a Montane Mixed Ombrophylous Forest Fragment, used for bovines pasturage, in the municipal district of Criúva - RS. It was inventoried 533 individuous in seven 10 x 100 m plots with DBH³ 10 em, distributed in 38 species from 33 gender and 20 families. The families wich presented the widest number of individuous were: Myrtaceae (33,0 %), Euphorbiaceae (19,7 %) e Araucariaceae (17,4 %). The total density found was 761,4 individuous/ha, and the medium DBH is 22,9 em and the higest 9,7 m. The part of the forest investigated is characterized by the lack of understorey, probably caused by intense presence of cattle, damaging especially plants of minor height and diameter. This fact might explain the lack of individuais to occupy the gaps caused by the removal of dominant trees out of the forest.

scholarly journals Dynamics of natural regeneration after disturbance in a remnant of Mixed Ombrophilous Forest in southern Brazil

2021 ◽  
Vol 16 (3) ◽  
pp. 1
Author(s):  
Alyne Regina Ruggiero ◽  
Lauri Amândio Schorn ◽  
Kristiana Fiorentin dos Santos ◽  
Tatiele Anete Bergamo Fenilli
Keyword(s):  
Natural Regeneration ◽  
Floristic Composition ◽  
Ecological Groups ◽  
Pioneer Species ◽  
Southern Brazil ◽  
Forest Fragment ◽  
Healing Phase ◽  
Successional Species ◽  
Ombrophilous Forest ◽  
Over 40 Years

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.

scholarly journals Frugivory and seed dispersal of Solanum granuloso-leprosum Dunal (Solanaceae) by birds in deciduous seasonal forest

2016 ◽  
Vol 76 (4) ◽  
pp. 818-823 ◽  
Author(s):  
F. A. F. Jacomassa
Keyword(s):  
Deciduous Forest ◽  
Bird Species ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Forest Fragment ◽  
Fruit Removal ◽  
Feeding Behaviors ◽  
River Region ◽  
Strong Competition ◽  
Uruguay River

Abstract The goal of this study was to identify which bird species consume Solanum granuloso-leprosum fruits and disperse its seeds. 60 hours of focal observations were carried out between April and May 2006 on the edge of a deciduous forest fragment in the Uruguay River region, Rio Grande do Sul state, Brazil. Ten species were observed in total removing 443 fruits. Saltator similis removed 61.8% of the fruits, followed by Tangara sayaca (17.1%), Pipraeidea bonariensis (11.7%), and T. preciosa (6.8%), while the remaining six species accounted for only 2.5% of the fruits removed. Most fruit removal occurred early in the day or mid-afternoon. The most common feeding behaviors were picking (60.7%), followed by stalling (23%) and hovering (16%). Birds flew more than 10 m from the fruit plant in 62% of the removal events. All bird species observed here may be considered potential dispersers of S. granuloso-leprosum, as they moved the seeds away from the mother plant where strong competition and predation are likely to occur. Results also suggest that S. granuloso-leprosum may be useful in ecological restoration programs.

scholarly journals Diferentes distúrbios antrópicos na paisagem podem influenciar padrões florísticos e estruturais da Mata Atlântica?

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Elisa Morais Paschoal ◽  
Arthur Duarte Vieira ◽  
Thiago José Ornelas Otoni ◽  
Aglaia Maciel Gripp ◽  
Jessica Pereira Freire ◽  
...  
Keyword(s):  
Structural Component ◽  
Basal Area ◽  
Floristic Composition ◽  
Semideciduous Forest ◽  
Floristic Similarity ◽  
Alpha And Beta Diversity ◽  
Intermediate Disturbance ◽  
Tree Communities ◽  
Environmental Variations ◽  
Tree Component

This study aimed to describe and compare the floristic and structural component of the tree component, as well as the alpha and beta diversity, as well as the floristic similarity of a remnant of Semideciduous Forest. The tree vegetation was sampled at two edges in contact with pasture (BP) and coffee growing (BC), and inside the fragment (INT). 2.840 individuals were sampled, identified in 56 families, 144 genera and 271 species (94 BC, 128 BP and 178 INT). The border stretches were characterized by higher density and smaller basal area than the interior, indicating the occurrence of disturbances. The variations in the structural floristic composition of the tree communities wereinfluenced by regional and local environmental variations, as well as the historical use of the area, according to Niche and Intermediate Disturbance Theories.

scholarly journals Tree structure and richness in an Atlantic Forest fragment: distance from anthropogenic and natural edges

2009 ◽  
Vol 33 (6) ◽  
pp. 1123-1132 ◽  
Author(s):  
Maíra Taquiguthi Ribeiro ◽  
Flavio Nunes Ramos ◽  
Flavio Antonio Maës Dos Santos
Keyword(s):  
Atlantic Forest ◽  
Rio De Janeiro ◽  
Basal Area ◽  
The State ◽  
Forest Fragment ◽  
Dead Trees ◽  
Tree Communities ◽  
Standing Dead ◽  
Total Study Area ◽  
Tree Branch

Approximately 7.2% of the Atlantic rainforest remains in Brazil, with only 16% of this forest remaining in the State of Rio de Janeiro, all of it distributed in fragments. This forest fragmentation can produce biotic and abiotic differences between edges and the fragment interior. In this study, we compared the structure and richness of tree communities in three habitats - an anthropogenic edge (AE), a natural edge (NE) and the fragment interior (FI) - of a fragment of Atlantic forest in the State of Rio de Janeiro, Brazil (22°50'S and 42°28'W). One thousand and seventy-six trees with a diameter at breast height > 4.8 cm, belonging to 132 morphospecies and 39 families, were sampled in a total study area of 0.75 ha. NE had the greatest basal area and the trees in this habitat had the greatest diameter:height allometric coefficient, whereas AE had a lower richness and greater variation in the height of the first tree branch. Tree density, diameter, height and the proportion of standing dead trees did not differ among the habitats. There was marked heterogeneity among replicates within each habitat. These results indicate that the forest interior and the fragment edges (natural or anthropogenic) do not differ markedly considering the studied parameters. Other factors, such as the age from the edge, type of matrix and proximity of gaps, may play a more important role in plant community structure than the proximity from edges.

scholarly journals COMPARAÇÃO DA EFICÁCIA DE TÉCNICAS DE NUCLEAÇÃO PARA RESTAURAÇÃO DE ÁREA DEGRADADA NO SUL DO BRASIL

FLORESTA ◽  
2013 ◽  
Vol 43 (1) ◽  
pp. 39 ◽  
Author(s):  
Suzane Bevilacqua Marcuzzo ◽  
Gislene Ganade ◽  
Maristela Machado Araújo ◽  
Marlove Fátima Brião Muniz
Keyword(s):  
Efficient Method ◽  
Natural Regeneration ◽  
Abiotic Factors ◽  
Floristic Composition ◽  
Southern Brazil ◽  
Porto Alegre ◽  
Urban Centers ◽  
Degraded Area ◽  
Exotic Vegetation ◽  
Remnant Forest

O desenvolvimento de grandes centros urbanos em áreas naturais resultou na supressão e degradação de florestas. A fim de obter ferramentas para implantação de programas de restauração nessas áreas, este estudo teve como objetivo avaliar a eficiência de diferentes técnicas nucleadoras sobre os fatores bióticos e abióticos que limitam a regeneração natural, em uma área degradada em remanescente de floresta, no perímetro rural-urbano de Porto Alegre, RS, Brasil. O experimento foi conduzido em blocos inteiramente casualizados, em esquema fatorial, composto pelos seguintes tratamentos: Controle (C), Transposição de Solo (TS), Resíduos da Arborização Urbana Triturados (RT), Transposição de Solo misturado aos Resíduos da Arborização Urbana Triturado (TS+RT) e Poleiros Artificiais. Durante 12 meses, foi avaliada a abundância e riqueza de plântulas estabelecidas, e por sete meses, a chuva de sementes em coletores. Os resultados indicam que a transposição de solo foi o método mais eficiente para restauração da área degradada em estudo. Adicionalmente, a utilização de poleiros artificiais se mostrou eficiente, indicando tendência de aumento da riqueza florística e de sementes dispersas. No entanto, a vegetação exótica da área urbana apresentou forte influência na composição florística, cuja sucessão terá trajetória diferente da vegetação original.Palavras-chave: Nucleação; poleiros artificiais; arborização urbana; transposição de solo.AbstractComparison of nucleation techniques effectiveness for degraded area restoring in Southern Brazil. The development of large urban centers in natural areas resulted in abolition and degradation of forests. In order to obtain tools for restoring programs development in such areas, this study aimed to evaluate efficiency of different nucleus techniques in relation to biotic and abiotic factors which limit natural regeneration in a depressed area of remnant forest in rural-urban perimeter of Porto Alegre, RS, Brazil. The experiment was conducted in randomized blocks, in factorial disposition, composed of the following treatments: Control (C), Transposition of Soil (TS), crushed waste of urban afforestation (RT), Transposition of soil mixed to crushed waste of urban afforestation (TS+RT), and artificial perches. During 12 months,  abundance and richness of seedlings laid down were evaluated and for seven months the seed rain in sinks. Results point that the soil transposition was the most efficient method for restoration of the degraded area. Additionally, artificial perches using proved to be efficient, pointing to wealth increase trend and floristic wealth of dispersed seeds. However, the exotic vegetation of the urban area has strong influences on floristic composition, whose succession will have different trajectory of original vegetation.Keywords: Artificial perches; nucleation; urban afforestation; soil transposition. 

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