scholarly journals Effect of forest fragmentation on microsporogenesis and pollen viability in Eugenia uniflora, a tree native to the Atlantic Forest

2012 ◽  
Vol 11 (4) ◽  
pp. 4245-4255 ◽  
Author(s):  
D.J. de Almeida ◽  
M.V. Faria ◽  
P.R. da Silva
Keyword(s):  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Pollen Viability ◽  
Eugenia Uniflora

Floral morphology and pollen viability of an endangered and endemic Bromeliaceae species from the Atlantic Forest

Grana ◽  
2021 ◽  
pp. 1-20
Author(s):  
Valéria Leobina dos Santos ◽  
Catarina Carvalho Nievola ◽  
Adriana de Oliveira Fidalgo ◽  
Shoey Kanashiro ◽  
Maria das Graças Lapa Wanderley ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Floral Morphology ◽  
Pollen Viability

scholarly journals Forest fragmentation in the landscape in the Atlantic Forest Biome: A systematic review of the literature

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Stephany Diolino Cunha ◽  
Bruna Sampaio Crivilin ◽  
Matheus da Silva Araújo ◽  
Luís Antônio Coimbra Borges
Keyword(s):  
Systematic Review ◽  
Landscape Ecology ◽  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Forest Fragments ◽  
Review Of The Literature ◽  
Search Terms ◽  
High Degree ◽  
Forest Biome ◽  
Degree Of Fragmentation

Forest fragmentation is defined as the process by which a continuous area of habitat is reduced in size and divided between spaces. Therefore, due to the increase in these areas, this study aimed to conduct a systematic review of the literature on forest fragments in the Atlantic Forest biome in order to verify their main characteristics and landscape ecology. Publications in search platforms referring to the period from 2000 to 2020 were analyzed such as: SciELO, Google academic and CAPES journals portal. The search terms entered were: “Studies of forest fragments in the Atlantic Forest biome” and “Landscape ecology in forest fragments”. A total of 15 articles were selected from among the works found, and 5 of these were chosen to be evaluated in the present study. Four of the five works were carried out in the state of Espírito Santo, close to basins and sub-basins, and only one work was carried out in a state park. Thus, the evaluated works with the theme, study of fragmentation and ecology of the landscape showed a high degree of fragmentation, meaning that they have fragments smaller than 5 hectares; in addition, all fragments have an irregular edge effect. Therefore, measures aimed at the conservation of biodiversity are needed in all places so that there is ecological restoration of the landscape and conservation of fauna and flora in the Atlantic Forest biome. 

scholarly journals Effect of Land Cover Change on Atlantic Forest Fragmentation in Rio Largo, Al, Brazil

2020 ◽  
pp. 102-114
Author(s):  
Lucas Galdino da Silva ◽  
Arthur Costa Falcão Tavares ◽  
Carlos Frederico Lins E. Silva Brandão ◽  
João Pedro dos Santos Verçosa ◽  
Raquel Elvira Cola ◽  
...  
Keyword(s):  
Land Cover ◽  
Land Cover Change ◽  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Pearson Correlation ◽  
Aerial Images ◽  
Forest Fragments ◽  
Case Scenario ◽  
Worst Case ◽  
Digital Format

This study's objective was to analyze the effect of land cover change, between 1965 and 2018, using statistical metrics and geoprocessing tools. And consequently, to provide information of area (ha) and spatial fragmentation of the Atlantic Forest in the municipality of Rio Largo/AL, Brazil. The samples were collected and transferred by CECA, CADEH, and INCRA, between November 2019 and April 2020. The basic materials used in this work were multi-temporal aerial images in digital format, derived from the 1965 aerophotogrametric survey on the scale 1:25000, belonging to the collection of the Engineering and Agrarian Sciences Campus - UFAL, and images of Landsat satellites (5 and 8) processed and made available by the Mapbiomas Project. The statistic landscape metrics were calculated using Landscape ecology Statistics (LECOs), a QGIS plugin. The analysis of forest fragmentation areas over the 53 years showed a reduction between 32.17% (1965) and 12.04% (2018) concerning the total extension of the municipality. In 1965, the average area obtained from 49 fragments was 201.13 ha. The values show a higher distance of forest fragments between 1965 and 1989, and disappearance by 2018.The Pearson correlation coefficient for 1965 and 2018 presented the value of r = -0.525, indicating a moderate and negative correlation between the mean values of areas (ha) of forest fragments and the number of forest fragments. The worst-case scenario for the maintenance of native forests occurred in 1989, where the reduction of continuous forest areas had 10.87 ha for forest area average, being spaced in 327 fragments. In the period 1986 and 1996, there was a decrease in fragmentation, reaching 200 fragments. In 1996 and 1997, there was an imbalance in forest maintenance, again increasing the number of fragments to 250 areas, and being explained by the loosening of surveillance in previous years, followed by deforestation.

scholarly journals Puma (Puma concolor) predation on tapir (Tapirus terrestris)

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Fernando Cesar Cascelli Azevedo ◽  
Vagner Canuto ◽  
Fernanda Souza ◽  
Cynthia Elisa Widmer
Keyword(s):  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Prey Species ◽  
Puma Concolor ◽  
Anthropogenic Habitats ◽  
First Report ◽  
Top Predators ◽  
Tapirus Terrestris ◽  
Generalist Diet ◽  
Different Levels

The process of forest fragmentation affects mostly top predators, which are more prone to first disappear. Pumas, Puma concolor, are known to have a generalist diet that includes a wide variety of wild and domestic prey species. The capacity of adapting their diet to consuming prey in anthropogenic habitats may be the reason for this species' success in incorporating anthropogenic areas with different levels of fragmentation as part of its habitat. Here we report a case of puma consumption of a large wild prey species, the tapir, Tapirus terrestris. From March 2012 to October 2013 we collected 85 puma's scats opportunistically inside fragments of the Atlantic Forest in the Parana state, Brazil. In one of the scats we found hairs and some hooves of a tapir, as well as puma hairs. We propose two hypotheses that may explain the occurrence of tapir in a pumás scat: (1) an event of scavenging or (2) an event of predation on a juvenile tapir. The most likely explanation for this event may be the predation of a juvenile in response to a possible abundant presence of tapirs in the study area. This event adds to our understanding of the great plasticity of this species to adapt to an altered landscape. To our knowledge, this is the first report of a puma scavenging or predation event on a tapir.

scholarly journals Quantitative Analysis of Forest Fragmentation in the Atlantic Forest Reveals More Threatened Bird Species than the Current Red List

PLoS ONE ◽  
2013 ◽  
Vol 8 (5) ◽  
pp. e65357 ◽  
Author(s):  
Jessica K. Schnell ◽  
Grant M. Harris ◽  
Stuart L. Pimm ◽  
Gareth J. Russell
Keyword(s):  
Quantitative Analysis ◽  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Bird Species ◽  
Red List

scholarly journals Spatial Analysis of Forest Fragmentation in the Atlantic Forest Bioma Areas

2018 ◽  
Vol 10 (12) ◽  
pp. 294
Author(s):  
Juliana Marchesan ◽  
Rudiney Soares Pereira ◽  
Elisiane Alba ◽  
Letícia Daiane Pedrali
Keyword(s):  
Spatial Analysis ◽  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Matrix Effects ◽  
Rio Grande ◽  
Area Ratio ◽  
Native Forest ◽  
Forest Fragments ◽  
Rio Grande Do Sul ◽  
R Language

The goal of this work was to calculate landscape ecology metrics using the R language, allowing the analysis of forest fragments under the Atlantic Forest domain located in the sub-basin of Arroio Jaquirana, Rio Grande do Sul, Brazil. For the mapping of the forest fragments, we used images from the REIS/RapidEye sensor dated 2016, and the classification was supervised through the Bhattacharya algorithm. The fragments were analyzed in seven size classes, to separate them and to calculate the landscape metrics it was used R language. The results attained demonstrated that the native forest occupied 34.01% of the study area, covering a total of 1,995 fragments, of which 93.43% were less than 5 ha. The highest values of edge and perimeter-area ratio were found in the small fragments indicating a greater edge effect, with the central areas of these remnants being exposed to the external matrix effects. Thus, it is concluded that the Atlantic Forest is highly fragmented and is extremely important to establish measures to minimize the effects and/or increase the connectivity between the fragments through ecological corridors using the smaller fragments, in addition, it makes necessary the development of public policies and research for the management of the region in order to preserve the remnants.

scholarly journals Analysis of Forest Fragmentation in Areas of the Atlantic Forest Biome from Various Sensor Systems

2018 ◽  
Vol 41 (2) ◽  
pp. 390-396
Author(s):  
R. R. SILVA ◽  
E. ALBA ◽  
J. MARCHESAN ◽  
M. M. ZIEMBOWICZ ◽  
R. S. PEREIRA
Keyword(s):  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Sensor Systems ◽  
Forest Biome

scholarly journals INFLUÊNCIA DA PRECIPITAÇÃO E TEMPERATURA DO AR NA PRODUÇÃO DE SERAPILHEIRA EM TRECHO DE FLORESTA ESTACIONAL EM SOROCABA, SP

FLORESTA ◽  
2014 ◽  
Vol 44 (4) ◽  
pp. 687 ◽  
Author(s):  
Rafael Nogueira Scoriza ◽  
Fatima Conceição Márquez Piña-Rodrigues
Keyword(s):  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Air Temperature ◽  
Environmental Changes ◽  
Atlantic Rainforest ◽  
Forest Fragment ◽  
Mata Atlântica ◽  
Paulo State ◽  
Mata Atlantica ◽  
Average Contribution

A fragmentação e destruição da Mata Atlântica tornam a sua conservação fundamental. A serapilheira é um importante componente desse sistema e apresenta diferenças na deposição nos diferentes ecossistemas brasileiros. Com isso, o objetivo deste estudo foi avaliar o efeito da precipitação e da temperatura do ar no aporte de serapilheira em fragmentos florestais localizados em Sorocaba, SP. A quantidade média de serapilheira aportada foi de 6,9 ± 0,4 mg.ha-1.ano-1, formada por 65% de folhas. Houve diferenças entre as deposições nas estações do ano, sendo que a menor quantidade foi depositada no período seco. A correlação da serapilheira e suas frações não foram significativas quando analisada para o mesmo mês da avaliação da temperatura do ar e precipitação. Porém, quando se relacionam meses anteriores, a correlação é mais expressiva, demonstrando que a resposta da vegetação a variações ambientais não é imediata.Palavras-chave: Clima; sazonalidade; Mata Atlântica. AbstractInfluence of precipitation and air temperature in production of litterfall in stretch of seasonal forest. Fragmentation and destruction of the Atlantic Rainforest make its conservation essential. The litter is an important component of this system, and reveals differences in deposition in the different Brazilian ecosystems. This research aims to evaluate the effect of rainfall and air temperature on litterfall input in a forest fragment at the municipality of Sorocaba, São Paulo State, Brazil. The average contribution of litterfall was 6.9±0.4Mg ha-1 yr-1, comprising 65% of leaves. There were differences between the seasons, with the less amount in the dry season. The correlation of litter and its fractions was not relevant for the same month of air temperature and rainfall measurement. However, the correlation is significant when related to the previous month, demonstrating that the response of vegetation to environmental changes is not immediate.Keywords: Climate; seasonality; Atlantic forest.

scholarly journals Effects of forest fragmentation on dipterofauna (Calliphoridae) at the Reserva Biológica do Tinguá, Nova Iguaçu, RJ

2010 ◽  
Vol 70 (1) ◽  
pp. 55-63 ◽  
Author(s):  
ACP. Ferraz ◽  
BQ. Gadelha ◽  
MMC. Queiroz ◽  
GE. Moya-Borja ◽  
VM. Aguiar-Coelho
Keyword(s):  
Species Richness ◽  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Edge Effects ◽  
Canopy Openness ◽  
Forest Interior

Samples were collected every month in three different sites of the Reserva Biológica do Tinguá, Brazil: site A was located on the border of the forest and sites B and C were located 1,000 and 500 m, respectively, towards the forest interior. The objective was to determine edge effects on a fragment of the Atlantic Forest. The greatest species richness was observed in sites A and B (23 species), compared with site C (16 species). Site A showed the greatest abundance and constancy, independent of the degree of synanthropy. Asynanthropic species were more abundant and constant in sites B and C. Site B showed the greatest diversity; and sites A and B showed the greatest similarity of populations. There was no significant correlation between Calliphoridae richness and canopy openness except in site C. Richness and abundance were positively correlated with subwood density, except for richness in site B.

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