scholarly journals Molecular evidence of Bartonella spp. in free-living opossums (Didelphimorphia: Didelphidae) from peri-urban Atlantic Forest fragments of Brazil

2020 ◽  
Author(s):  
Amanda Alcantara ◽  
Helena Thoma ◽  
Sabrina Campos ◽  
Rosemeri Teixeira ◽  
Hans Lima ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Molecular Evidence ◽  
Forest Fragments ◽  
Free Living

Bird Extinctions in Atlantic Forest Fragments of the Viçosa Region, Southeastern Brazil

2003 ◽  
Vol 17 (6) ◽  
pp. 1827-1839 ◽  
Author(s):  
RÔMULO RIBON ◽  
JOSÉ EDUARDO SIMON ◽  
GERALDO THEODORO DE MATTOS
Keyword(s):  
Atlantic Forest ◽  
Southeastern Brazil ◽  
Forest Fragments

scholarly journals Small mammal glucocorticoid concentrations vary with forest fragment size, trap type, and mammal taxa in the Interior Atlantic Forest

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sarah A. Boyle ◽  
Noé U. de la Sancha ◽  
Pastor Pérez ◽  
David Kabelik
Keyword(s):  
Atlantic Forest ◽  
Small Mammals ◽  
Acute Stress ◽  
Physiological Stress ◽  
Fragment Size ◽  
Hair Shaft ◽  
Forest Fragments ◽  
Forest Fragment ◽  
Trapping Methods ◽  
Free Ranging

AbstractSpecies that live in degraded habitats often show signs of physiological stress. Glucocorticoid hormones (e.g., corticosterone and cortisol) are often assessed as a proxy of the extent of physiological stress an animal has experienced. Our goal was to quantify glucocorticoids in free-ranging small mammals in fragments of Interior Atlantic Forest. We extracted glucocorticoids from fur samples of 106 small mammals (rodent genera Akodon and Oligoryzomys, and marsupial genera Gracilinanus and Marmosa) from six forest fragments (2–1200 ha) in the Reserva Natural Tapytá, Caazapá Department, Paraguay. To our knowledge, this is the first publication of corticosterone and cortisol levels for three of the four sampled genera (Akodon, Oligoryzomys, and Marmosa) in this forest system. We discovered three notable results. First, as predicted, glucocorticoid levels were higher in individuals living withing small forest fragments. Second, animals captured live using restraint trapping methods (Sherman traps) had higher glucocorticoid levels than those animals captured using kill traps (Victor traps), suggesting that hair glucocorticoid measures can reflect acute stress levels in addition to long-term glucocorticoid incorporation. These acute levels are likely due to urinary steroids diffusing into the hair shaft. This finding raises a concern about the use of certain trapping techniques in association with fur hormone analysis. Finally, as expected, we also detected genus-specific differences in glucocorticoid levels, as well as cortisol/corticosterone ratios.

Rickettsia rickettsii infecting Rhipicephalus sanguineus sensu lato (Latreille 1806), in high altitude atlantic forest fragments, Ceara State, Brazil

Acta Tropica ◽  
2017 ◽  
Vol 173 ◽  
pp. 30-33 ◽  
Author(s):  
Arannadia Barbosa Silva ◽  
Myrian Morato Duarte ◽  
Robson da Costa Cavalcante ◽  
Stefan Vilges de Oliveira ◽  
Vinicius Figueiredo Vizzoni ◽  
...  
Keyword(s):  
High Altitude ◽  
Atlantic Forest ◽  
Rhipicephalus Sanguineus ◽  
Forest Fragments ◽  
Rickettsia Rickettsii ◽  
Rhipicephalus Sanguineus Sensu Lato

Random placement models explain species richness and dissimilarity of frog assemblages within Atlantic Forest fragments

2022 ◽  
Author(s):  
Mauricio Almeida‐Gomes ◽  
Nicholas J. Gotelli ◽  
Carlos Frederico Duarte Rocha ◽  
Marcus Vinícius Vieira ◽  
Jayme Augusto Prevedello
Keyword(s):  
Species Richness ◽  
Atlantic Forest ◽  
Forest Fragments ◽  
Random Placement

scholarly journals Ticks infesting birds in Atlantic Forest fragments in Rio Claro, State of Sao Paulo, Brazil

2013 ◽  
Vol 22 (1) ◽  
pp. 6-12 ◽  
Author(s):  
Gustavo Seron Sanches ◽  
Thiago Fernandes Martins ◽  
Ileyne Tenório Lopes ◽  
Luís Flávio da Silva Costa ◽  
Pablo Henrique Nunes ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Tick Species ◽  
Native Species ◽  
Sao Paulo ◽  
Native Forest ◽  
Forest Fragments ◽  
São Paulo ◽  
Eucalyptus Tereticornis ◽  
New Host ◽  
New Host Records

In the present study, we report tick infestations on wild birds in plots of the Atlantic Forest reforested fragments with native species and plots reforested with Eucalyptus tereticornis in the municipality of Rio Claro, State of Sao Paulo, Brazil. A total of 256 birds were captured: 137 individuals of 33 species, in planted native forest; and 128 individuals of 37 species, in planted Eucalyptus tereticornis forest. Nymphs of two tick species were found on the birds: Amblyomma calcaratumand Amblyomma longirostre, the former was more abundant in the fragments reforested with Atlantic forest native species, and the latter in the fragment reforested with E. tereticornis. New host records were presented for A. calcaratum.

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 The effect of fragmentation on spider richness (Arachnida: Araneae) in montane semideciduous seasonal forest

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
Flávio Eduardo Vilas Boas Júnior ◽  
Amanda Da Silva Ferreira ◽  
Marcos Magalhães De Souza
Keyword(s):  
Species Richness ◽  
Atlantic Forest ◽  
Minas Gerais ◽  
Fragmentation Process ◽  
Natural Environments ◽  
Forest Fragments ◽  
Spider Species ◽  
Semideciduous Seasonal Forest ◽  
Agricultural Areas ◽  
Environmental Functions

The fragmentation process that has altered natural environments has been widely discussed, as it causes changes in communities and compromises different environmental functions. In this sense, this study was based on the evaluation of fragmentation on araneofauna of semideciduous seasonal forest fragments, phytophysiognomy belonging to the Atlantic Forest. The study was conducted in three fragments in the municipality of Inconfidentes, southern Minas Gerais, from April 2014 to March 2015. The results showed that there is a similarity in the composition of spider species among the sampled fragments and that the size of the fragment is positively correlated with species richness. Our data show that smaller fragments must be preserved and that agricultural areas maintain the integrity of adjacent forest areas to benefit from the predation dynamics that spiders exert on pests that affect plantations.

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