scholarly journals Influência da precipitação pluviométrica na regeneração natural em trecho de uma floresta ombrófila densa aluvial (Influence of rainfall in natural regeneration in a dense ombrophylous forest alluvial in eastern amazona, Pará, Brasil

2019 ◽  
Vol 12 (4) ◽  
pp. 1302
Author(s):  
Millena Vasconcelos Pantoja ◽  
Maria Aurora Santos da Mota ◽  
Mário Augusto Jardim
Keyword(s):  
Natural Regeneration ◽  
Rainy Season ◽  
Floodplain Forest ◽  
Structural Composition ◽  
Internal Precipitation ◽  
Composition And Structure ◽  
Ombrophilous Forest ◽  
Number Of Individuals ◽  
Dense Ombrophilous Forest ◽  
Floristic Structure

R E S U M OO objetivo do presente estudo foi avaliar a influência da precipitação interna sobre a composição e estrutura da regeneração natural em um trecho de floresta ombrófila densa aluvial no estuário amazônico. Os dados foram coletados de fevereiro a julho de 2016, em quatro parcelas de 20 x 20m, subdivididas em subparcelas de 1 x 1m para análise da composição florística e estrutural da regeneração e instalados 11 pluviômetros para amostragem da precipitação. Houve pouca variação na quantidade de indivíduos, famílias, gêneros e espécies entre o período chuvoso e o menos chuvoso.  Pariana campestris Aubl., Anthurium sinuatum Benth. ex, Schott, Costus arabicus L. e Costus spicatus (Jacq.) Sw. foram mais representativas devido aos impactos antrópicos na área. Conclui-se que não houve influência da precipitação interna na abundância e na riqueza de espécies da regeneração natural.Palavras-chave: Floresta de várzea; florística; estrutura.  A B S T R A C T The objective of the present study was to evaluate the influence of internal precipitation on the composition and structure of natural regeneration in an alluvial dense ombrophilous forest in the Amazonian estuary. The data were collected from february to july 2016, in four 20 x 20m plots, subdivided into 1x1m subplots to analyze the floristic and structural composition of the regeneration and using 11 pluviometers to sample the precipitation. There was little variation in the number of individuals, families, genera and species between the rainy season and the less rainy season. Pariana campestris Aubl., Anthurium sinuatum Benth. Schott, Costus arabicus L. and Costus spicatus (Jacq.) Sw. were more representative due to anthropic impacts on the area. It was concluded that there was no influence of internal precipitation on the abundance and richness of natural regeneration species.Keywords: Floodplain forest, Floristic, Structure. 

scholarly journals Composition and structure of a stretch of tropical forest in the Eastern Amazon

2021 ◽  
Vol 51 (4) ◽  
Author(s):  
Robson Carmo Lima ◽  
Maurício Alves Sardinha ◽  
Jefferson dos Santos Souza ◽  
Renan Sousa ◽  
Valdenira Ferreira dos Santos ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Forest Structure ◽  
Great Variability ◽  
The State ◽  
Horizontal Structure ◽  
Sampling Process ◽  
Composition And Structure ◽  
Ombrophilous Forest ◽  
Dense Ombrophilous Forest

ABSTRACT: The aim of this study was to determine the diversity. composition. forest structure of a stretch of dense ombrophilous forest in the state of Amapá. The area is located in the east of the state of Amapá. in the Eastern Amazon. at the following coordinates: 2º 0’0.00 ’’ N. 14º 0’0.00’’O. The sampling process used was systematic. where nine plots of 1 ha (100 m x 100 m) were allocated. 0.5 km apart. within a 13 km long and 0.03 km wide transect. The horizontal structure of the forest was evaluated using phytosociological parameters. One thousand seven hundred and ninety trees were sampled in this study. they were distributed in 131 species. 69 genera and 48 families. The species that presented more individuals were Pouteria guianensis Aubl. (136). Eschweilera coriacea (DC.) S.A.Mori (78). Inga paraensis Ducke (45). Licania paraensis Prance (38). The area is highly diverse and dissimilar with great variability and complexity in vegetable formation.

scholarly journals Dynamics of Natural Regeneration in a Fragment of Dense Ombrophilous Forest in Urban Area

2018 ◽  
Vol 27 (3) ◽  
pp. 1-15
Author(s):  
Adão Batista de Araújo ◽  
Djailson Silva da Costa Júnior ◽  
Yana Souza Lopes ◽  
Paullyne Charllotte Gonçalves Celestino ◽  
Anália Carmem Silva de Almeida ◽  
...  
Keyword(s):  
Urban Area ◽  
Natural Regeneration ◽  
Ombrophilous Forest ◽  
Dense Ombrophilous Forest

scholarly journals Nutritional Contribution of Litter in Rainforest of Brazil

2019 ◽  
Vol 11 (3) ◽  
pp. 254
Author(s):  
Rosival B. A. Lima ◽  
Luiz C. Marangon ◽  
Fernando J. Freire ◽  
Ana L. P. Feliciano ◽  
Maria B. G. S. Freire ◽  
...  
Keyword(s):  
Nutrient Cycling ◽  
Vegetative Growth ◽  
Natural Regeneration ◽  
Climatic Changes ◽  
Forest Fragment ◽  
Climatic Variations ◽  
Litter Deposition ◽  
Ombrophilous Forest ◽  
Level Of Importance ◽  
Dense Ombrophilous Forest

Lowlands Dense Ombrophilous Forest is one phytophysiognomies of Atlantic Forest in Brazil. The main ecological characteristic of this forest is the Ombrophilous environment, related to high rainfall and temperature indexes. Nutrient cycling is well balanced in the periods of good thermo-pluviometric distribution. Global climatic changes have been intensifying in recent years making rainfall irregular, changing its distribution and intensity throughout the year. This can affect the natural regeneration and vegetative growth of the species. This study aimed to correlate litterfall and nutrient contribution with climatic variations, identifying the level of importance of this correlation and which nutrients may have their compromised cycling. Literfall was collected monthly in 40 collectors. N, P, K, Ca and Mg contents were determined and their stocks were calculated. The litter deposition was 8,261.15 kg ha-1 year-1 and was not influenced by rainfall and temperature. The N, P, K, Ca and Mg stock in this litter was 244.93 kg ha-1 year-1, being stored just of N 113.75 kg ha-1 year-1. P and K stocks varied with rainfall and temperature, suggesting that variations in these climatic variables may interfere in the cycling of these nutrients in this forest fragment.

scholarly journals Forest restoration by different nucleation techniques in Urochloa grassland

2021 ◽  
Vol 56 ◽  
Author(s):  
Rosimeri de Oliveira Fragoso ◽  
Antonio Aparecido Carpanezzi ◽  
Katia Christina Zuffellato-Ribas ◽  
Henrique Soares Koehler
Keyword(s):  
Natural Regeneration ◽  
Native Species ◽  
Forest Restoration ◽  
Woody Species ◽  
Control Treatment ◽  
Plastic Mulch ◽  
Black Plastic ◽  
Ombrophilous Forest ◽  
Dense Ombrophilous Forest ◽  
Over Time

Abstract: The objective of this work was to evaluate the effect of brushwood, black plastic mulch, herbicide, and artificial perch on the natural regeneration of native species in Urochloa grassland. The experiment was conducted between February 2014 and February 2016 in the Dense Ombrophilous Forest, in the municipality of Morretes, in the state of Paraná, Brazil. The treatments were: herbicide, herbicide + perch, black plastic mulch, black plastic mulch + perch, brushwood + herbicide, brushwood + herbicide + perch, and a control treatment. The evaluations were carried out at 4, 8, 12, 18, and 24 months after the installation of the experiment, by counting and identifying regenerating woody species and estimating visually the percentage of herbaceous coverage. Initially, brushwood and black plastic mulch reduced the Urochloa grasses; however, this effect was lost over time due to the rapid growth of the grasses from the edges to the center of the plots. The use of perches in the treatments does not allow a significant increase of other species because of the continued inhibiting conditions for the establishment of seedlings. The herbicide is effective in removing the grasses; however, the recruitment of woody species is only satisfactory when perches are used to attract the dispersing fauna. For a successful ecological restoration of pastures, there is a need for the local elimination of Urochloa grasses.

scholarly journals Species composition and structure of parasites component communities of tugun Coregonus tugun (Pallas, 1814) from the Khatanga and Yenisei Rivers

2019 ◽  
Vol 8 (3) ◽  
pp. 72-80
Author(s):  
Kseniya Viktorovna Polyaeva ◽  
Gennady Nikolaevich Dorovskikh ◽  
Yuliya Konstantinovna Chugunova
Keyword(s):  
Species Composition ◽  
Parasite Community ◽  
Shannon Index ◽  
Egg Laying ◽  
Entire Study ◽  
Generalist Species ◽  
Parasite Communities ◽  
Composition And Structure ◽  
Number Of Individuals ◽  
Species Composition And Structure

Tugun Coregonus tugun (Pallas, 1814) is an endemic of Siberia. Information about the species composition and structure of tugun parasite community on the stage of spawning migration is described in this paper. We carried out ichtioparasitologic studies in the Yenisey and the Khatanga Rivers in 2011-2014. Tugun parasite complex from the Khatanga River remains statistically identical in species composition, number of individuals and biomass and differs from those of the Yeniseis tugun over the entire study period. Apparently two different stocks of tugun were investigated in the Yenisei River. One of them lives in the Yeniseis streambed, the other one lives in the Podkamennaya Tunguska River. The composition of the parasitic fauna of tugun from two rivers is formed by generalist species. Tugun parasites component communities from all material collection stations have high values of the Shannon index and two dominant species (by numbers of parasites and by biomass). We found out that the species biomasses differ significantly on the graphic community structure. The description of tugun parasite communities corresponds to characteristic of a climax community on the stage of destruction except the graphic structure. In the analyzed parasitic communities the processes of egg laying and larval appearance, the death of parasites of previous year generation and infection with this year parasites occur simultaneously. The stages of formation and destruction of the community overlap. The described state of tugun parasites communities has an adaptive value. The load on the host body is reduced which ensures the long-term existence of parasites.

scholarly journals Genera of Belytinae (Hymenoptera: Diapriidae) recorded in the Atlantic Dense Ombrophilous Forest from Paraíba to Santa Catarina, Brazil

2017 ◽  
Vol 57 (6) ◽  
pp. 57
Author(s):  
Alex Leite Quadros ◽  
Carlos Roberto F. Brandão
Keyword(s):  
Atlantic Forest ◽  
Rain Forest ◽  
Latitudinal Gradient ◽  
Parasitoid Wasps ◽  
Santa Catarina ◽  
Specific Level ◽  
Natural Regulation ◽  
Ombrophilous Forest ◽  
Dense Ombrophilous Forest ◽  
Malaise Traps

The parasitoid wasps Belytinae (Hymenoptera: Diaprioidea: Diapriidae) recorded thus far in the Atlantic Dense Ombrophilous Forest are reviewed at the supra specific level. The knowledge about the diversity of Belytinae in the Atlantic Forest is relatively poor, although these parasitoids may play a key role in the natural regulation of populations of the Mycetophilidae and Sciaridae (Diptera). The material used in this study comes mostly from standardized collections in 18 regularly spaced sites, from Paraíba to Santa Catarina Brazilian states, between 2000 and 2002, by the project “Richness and diversity of Hymenoptera and Isoptera along a latitudinal gradient in the Atlantic Forest – the eastern Brazilian rain forest” (Biota/SP – FAPESP). At each location ten Malaise traps and a hundred Moericke traps were installed, both along two parallel transects spaced 100 m from each other. Further, a similar effort for the sweeping of vegetation was applied at each locality, being each sweeping sample the result of 5 minutes of sweeping. Traps, and sweeping of vegetation in the summed localities yielded a total of 1,241 Belytinae specimens, of which we recognize 115 morphospecies in eight genera (Aclista, Belyta, Cinetus, Odontopsilus, Scorpioteleia, Lyteba, Tropidopsilus and Camptopsilus). A further belytine genus (Miota), recorded in similar environment, was found at the collection of the Federal University of Espírito Santo and added to the list, totalling nine here keyed genera; for each genus we include a diagnosis, comments and a discussion on its records, distribution and biology; we also provide twenty-two plates with 102 figures (93 photographs and 9 maps).

Reproductive biology of the false coral snake Oxyrhopus guibei (Colubridae) from southeastern Brazil

2002 ◽  
Vol 23 (4) ◽  
pp. 495-504 ◽  
Author(s):  
Otavio Marques ◽  
Lígia Pizzatto
Keyword(s):  
Body Size ◽  
Reproductive Biology ◽  
Rainy Season ◽  
Reproductive Activity ◽  
Climatic Conditions ◽  
Southeastern Brazil ◽  
Coral Snake ◽  
Males And Females ◽  
Reproductive Cycles ◽  
Number Of Individuals

AbstractThe reproductive biology of the false coral snake, Oxyrhopus guibei, was studied through dissection of 496 specimens, combined with observations on captive individuals. Males mature with smaller body size than females, females attain much larger body size, and male-male combat is not expected. Clutch size ranged from 3 to 20, and was correlated with female length. Reproductive cycles in both males and females seem to be continuous, with vitellogenesis and spermatogenesis occurring throughout the year. Reproductive activity in both sexes decreased at the end of the rainy season possibly due to previous intense reproductive activity in more favorable climatic conditions. The smaller number of individuals collected at the end of the rainy season apparently occurs due to the decrease of reproductive activity of this snake.

scholarly journals ESTRUTURA HORIZONTAL DE UM TRECHO DE FLORESTA OMBRÓFILA DENSA DAS TERRAS BAIXAS NA RESERVA BIOLÓGICA DE SOORETAMA, LINHARES, ES

FLORESTA ◽  
2011 ◽  
Vol 41 (2) ◽  
Author(s):  
Alessandro de Paula ◽  
João Juares Soares
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Species Distribution ◽  
Ecological Groups ◽  
Horizontal Structure ◽  
Shannon’S Index ◽  
Dense Forest ◽  
Ombrophilous Forest ◽  
Dense Ombrophilous Forest ◽  
Biological Reserve

Este trabalho teve como objetivo analisar a estrutura fitossociológica horizontal de um trecho da vegetação arbórea de uma floresta de tabuleiro. Foi realizada uma amostragem fitossociológica em 100 parcelas contíguas de 10 x 10 m, sendo amostrados os indivíduos com PAP ≥ 15 cm. Construiu-se a distribuição diamétrica e estimou-se o padrão de distribuição espacial das espécies. Foram amostrados 1519 indivíduos, distribuídos entre 265 espécies, 138 gêneros e 44 famílias. O índice de Shannon (H’) estimado foi de 4,87 nats/ind. As espécies com os maiores VI foram Rinorea bahiensis (Moric.) Kuntze, Eriotheca macrophylla (K. Schum.) A. Robyns e Sterculia speciosa K. Schum. Em relação aos grupos ecológicos, as secundárias tardias obtiveram mais que o dobro do VC e VI das secundárias iniciais. A distribuição diamétrica apresentada pelas pioneiras foi truncada, sendo que a das secundárias iniciais foi ampla. A predominância de espécies tolerantes ao sombreamento nos estágios iniciais de crescimento reforça a ideia de que o estádio sucessional encontra-se avançado. Foram encontradas 10 espécies com padrão de distribuição espacial agregado e 29 aleatório.Palavras-chave:Fitossociologia; estrutura horizontal; Floresta Ombrófila Densa; floresta de tabuleiro; floresta atlântica. AbstractHorizontal structure of Ombrophilous dense forest of lowlands in Sooretama Biological Reserve, Linhares. This work aimed to analyze horizontal structure of arboreal vegetation from a “tableland” forest. A phytosociological sample was carried out on 100 contiguous plots of 10 X 10 meters. We sampled the individuals with PBH ≥ 15 cm, built up the diametric distribution and estimated spatial species distribution pattern. We sampled 1519 individuals, which were distributed into 265 species, 138 genera and 44 families. Shannon’s Index (H’) was estimated at 4.87 nats/ind. Species with the highest IV were Rinorea bahiensis (Moric.) Kuntze, Eriotheca macrophylla (K. Schum.) A. Robyns and Sterculia speciosa K. Schum. In relation to ecological groups, the late secondary species obtained CV and IV, twice as much as the early secondary ones. Pioneers presented truncated diametric distribution, as long as the early secondary had a broader one. Shadow tolerant species predominance reinforces that successional stadium is advanced. It had been found 10 species with aggregated spatial distribution and 29 random ones.Keywords:              Phytosociology; horizontal structure; Dense Ombrophilous Forest; tabuleiro forest; atlantic forest.

scholarly journals Structural composition and distribution of tree species of Dudhpukuria-Dhopachori Wildlife Sanctuary, Chittagong, Bangladesh

2018 ◽  
Vol 3 (1) ◽  
pp. 17-30 ◽  
Author(s):  
MA Hossain ◽  
MK Hossain ◽  
MS Alam ◽  
MM Abdullah Al Mamun
Keyword(s):  
Tree Species ◽  
Natural Regeneration ◽  
Sustainable Management ◽  
Dominant Species ◽  
The Other ◽  
Wildlife Sanctuary ◽  
Height Range ◽  
Structural Composition ◽  
Number Of Species ◽  
Successful Recruitment

Structural composition based on diameter and height class distribution of the tree species of Dudhpukuria-Dhopachori Wildlife Sanctuary, Chittagong, Bangladesh was assessed. A total of 183 tree species having ≥ 10 DBH belonging to 125 genera and 48 families was recorded from the study area. Different species were found to dominate in different DBH classes, i.e. Aporosa wallichii (4.06%), Artocarpus chama (1.54%) and Dillenia pentagyna (0.38%) dominated 10 - < 25 cm, 25 - < 40 cm and 40 - < 55 cm DBH, respectively. Swintonia floribunda was found in maximum (7 out of 8) number of DBH classes. Both the percentage of tree individuals (73.18%) and number of species (169) were highest in 10-24.5cm DBH range. Similarly, Dipterocarpus turbinatus (14.5-24.4m and 24.5-34.4m) and Swintonia floribunda (34.5-44.4m and 44.5-54.4m) were dominant in two height ranges each. On the other hand, height range 4.5 - 14.4 m was dominated by Aporosa wallichii (4.36%). Dipterocarpus costatus, Artocarpus chama, Syzygium firmum and Bombax insigne were found in all the height classes. Both the number of tree species and number of individual stems (167 species; 1,684 individuals) were highest in the height range of 4.5-14.4m. The number of species and tree individuals decreased linearly with increasing height. All these indicate that, there was a sustainable natural regeneration and successful recruitment of Aporosa wallichii, Dipterocarpus turbinatus, Lithocarpus acuminata, Grewia nervosa and Artocarpus chama in Dudhpukuria-Dhopachori Wildlife Sanctuary. Dipterocarpus turbinatus was found as dominant species as it constitures maximum (5.56%) percentage of all tree individuals. The findings of the study may be useful for protection, conservation and sustainable management of Dudhpukuria-Dhopachori Wildlife Sanctuary.J. Biodivers. Conserv. Bioresour. Manag. 2017, 3(1): 17-30

scholarly journals Seasonal variability of the composition and structure of parasite communities of red porgy, Pagrus pagrus (Perciformes: Sparidae) off Brazil

2015 ◽  
Vol 52 (3) ◽  
pp. 236-243 ◽  
Author(s):  
I. A. Soares ◽  
J. L. Luque
Keyword(s):  
Rainy Season ◽  
Dominant Species ◽  
Parasite Community ◽  
Reproductive Activity ◽  
Metazoan Parasites ◽  
Parasite Communities ◽  
Four Seasons ◽  
Composition And Structure ◽  
Pagrus Pagrus ◽  
Autumn And Winter

Abstract A study of seasonal variation of metazoan parasite community of Pagrus pagrus was conducted between January and December 2012. Two hundred forty specimens of Pagrus pagrus were collected in four seasons (autumn and winter in dry season and spring and summer in rainy season) from off the state of Rio de Janeiro, Brazil. Twenty one species of metazoan parasites were found, with larvae of Hysterothylacium sp. being the dominant species. The highest values of prevalence and abundance was during the rainy season with peak prevalence of monogeneans and nematodes, period of action of the South Atlantic Central Waters (SACW) and reproductive activity of the host, suggesting that the sasonal variation in the parasites community was influenced for these phenomena.

Sign in / Sign up

Export Citation Format

Share Document