scholarly journals POTENTIAL AREAS FOR THE FORMATION OF ECOLOGICAL CORRIDORS BETWEEN REMNANTS OF ATLANTIC FOREST

2016 ◽  
Vol 40 (5) ◽  
pp. 803-813 ◽  
Author(s):  
João Flávio Costa dos Santos ◽  
Bruno Araujo Furtado de Mendonça ◽  
Emanuel José Gomes de Araújo ◽  
Rafael Coll Delgado ◽  
José Marinaldo Gleriani
Keyword(s):  
Solar Radiation ◽  
Atlantic Forest ◽  
Natural Regeneration ◽  
Global Solar Radiation ◽  
Landsat 8 ◽  
Forest Fragments ◽  
Ecological Corridors ◽  
Fuzzy Membership Functions ◽  
Terrain Attributes

ABSTRACT In Brazil, the remaining areas of Atlantic Forest are intensely fragmented. The connection of forest fragments through ecological corridors is an important step in biodiversity conservation. Certain areas are more resilient, and in those areas, natural forest regeneration, for example, can be encouraged. The aim of this study was to identify areas of greater resilience in order to support the connection of Atlantic Forest fragments with ecological corridors. Forest fragments in the municipality of Paraíba do Sul, in the state of Rio de Janeiro, were mapped using the supervised maximum likelihood classification of an Operational Land Imager (OLI)/Landsat-8 sensor image. Next, we analyzed the influence of terrain attributes (aspect, incident solar radiation, slope, and curvature profile) on natural regeneration. The areas with the greatest potential to achieve natural regeneration and to form ecological corridors were indicated through fuzzy membership functions. Within Paraíba do Sul, 31% of the territory is covered by vegetation in different stages of regeneration. Recordings were made of 1,251 forest fragments in a middle or advanced stage of regeneration. These fragments are usually situated in the southeast, south, and southwest aspects, in areas that receive the least amount of global solar radiation (Wh·m-2) per year, and on slopes with an angle of inclination greater than 20%. The adjustment of fuzzy functions identified 17,327.5 ha with a tendency to recover, and which are therefore strategic areas in the development of ecological corridors.

scholarly journals Identificação de Fragmentos Florestais Potencias para a delimitação de Corredores Ecológicos na bacia hidrográfica do Rio Itapemirim, ES por meio técnicas de Sensoriamento Remoto

2020 ◽  
Vol 13 (2) ◽  
pp. 595
Author(s):  
Ivo Augusto Lopes Magalhaes ◽  
Carlos Roberto Lima Thiago ◽  
Alexandre Rosa Dos Santos
Keyword(s):  
River Basin ◽  
Atlantic Forest ◽  
Forest Cover ◽  
Landsat 8 ◽  
Forest Fragments ◽  
Landsat 8 Oli ◽  
Ecological Corridors ◽  
Spatial Attributes ◽  
Remote Sensing Techniques ◽  
High Degree

Os corredores ecológicos surgem como alternativa para mitigar os efeitos da fragmentação florestal permitindo entre eles o fluxo gênico de fauna e flora e a recolonização de áreas degradadas. Diante do exposto o presente estudo teve como objetivo, identificar para a bacia hidrográfica do rio Itapemirim, ES, por meio de metodologia desenvolvida em Sistemas de Informações Geográficas, a delimitação de corredores ecológicos que propiciem a interligação de fragmentos florestais, identificados mediante análise das métricas da paisagem como fragmentos florestais com atributos espaciais, que sugerem maior conservação. A metodologia consistiu no mapeamento dos fragmentos florestais por meio de técnicas de classificação supervisionada utilizando imagem do satélite LANDSAT 8 OLI, obtidas junto ao Instituto Nacional de Pesquisas Espaciais. Realizou-se o cálculo dos índices de ecologia, por meio do software ArcGis 10.2, com a extensão de domínio público V-LATER 2.0. Identificou-se 11.749 fragmentos florestais, que representam 22% de cobertura florestal na bacia hidrográfica. Os fragmentos pequenos (< 5 ha) foram encontrados em maior número, 8.394, seguidos pelos fragmentos de tamanho médio (5 a 50 ha), 2.995, e grandes (> 50 ha), 360. O número de fragmentos apresentaram relação inversa com sua contribuição na área. O bioma Mata Atlântica presente na bacia hidrográfica do rio Itapemirim, é representado, em sua maioria, por fragmentos florestais pequenos, menores que 5 ha, indicando um alto grau de fragmentação.  Identification of Forest Fragments Potential for the delimitation of Ecological Corridors in the Itapemirim, ES River Basin through Remote Sensing techniques A B S T R A C TEcological corridors emerge as an alternative to mitigate the effects of forest fragmentation, allowing for the gene flow of fauna and flora and the recolonization of degraded areas. Given the above, the present study aimed to identify, for the Itapemirim river basin, ES, through a methodology developed in Geographic Information Systems, the delimitation of ecological corridors that allow the interconnection of forest fragments, identified through the analysis of the metrics. landscape as forest fragments with spatial attributes, which suggest greater conservation. The methodology consisted of mapping forest fragments by supervised classification techniques using LANDSAT 8 OLI satellite imagery, obtained from the National Institute for Space Research. Ecology indices were calculated using the ArcGis 10.2 software, with the public domain extension V-LATER 2.0. A total of 11,749 forest fragments were identified, representing 22% of forest cover in the watershed. Smaller fragments (<5 ha) were found in larger numbers, 8,394, followed by medium sized fragments (5 to 50 ha), 2,995, and large fragments (> 50 ha), 360. The number of fragments was inversely related to their size. contribution in the area. The Atlantic Forest biome present in the Itapemirim river basin is mostly represented by small forest fragments, smaller than 5 ha, indicating a high degree of fragmentation.Keywords: Indexes of landscape ecology, Atlantic Forest, Geoprocessing.

Fuzzy concept applied in determining potential forest fragments for deployment of a network of ecological corridors in the Brazilian Atlantic Forest

2020 ◽  
Vol 115 ◽  
pp. 106423 ◽  
Author(s):  
Alexandre Rosa dos Santos ◽  
Emanuel França Araújo ◽  
Quétila Souza Barros ◽  
Milton Marques Fernandes ◽  
Márcia Rodrigues de Moura Fernandes ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Forest Fragments ◽  
Brazilian Atlantic Forest ◽  
Ecological Corridors ◽  
Fuzzy Concept

Classification of solar radiation zones and general models for estimating the daily global solar radiation on horizontal surfaces in China

2017 ◽  
Vol 154 ◽  
pp. 168-179 ◽  
Author(s):  
Yanfeng Liu ◽  
Yong Zhou ◽  
Dengjia Wang ◽  
Yingying Wang ◽  
Yong Li ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Global Solar Radiation

Structure and Successional Classification of the Shrub-Arboreal Component in a Remnant of Atlantic Forest, Northeastern Brazil

2019 ◽  
pp. 1-16
Author(s):  
Nelio Domingos da Silva ◽  
Luiz Carlos Marangon ◽  
Ana Lícia Patriota Feliciano Marangon ◽  
José Antônio Aleixo da Silva
Keyword(s):  
Atlantic Forest ◽  
Natural Regeneration ◽  
Northeastern Brazil ◽  
Distribution Analysis ◽  
Secondary Species ◽  
Height Class ◽  
Forest Interior ◽  
Absolute Density ◽  
Interior Environments

Aims: We aimed to evaluate the structure and successional classification of component shrub-arboreal in the edge and interior environments in a remnant of Tropical Forest in Pernambuco, Brazil. Place and Duration of Study: The study was conducted in a remnant of the Lowland Ombrophilous Dense Forest categorized as Urban Forest Reserve named Mata of Manassu, with an area approximately 264.24 ha and located in Jaboatao dos Guararapes, Pernambuco. The data were registered between March 2017 and September 2017. Methodology: The data were collected in 40 100 m2 plots, 20 plots in each environment: edge and forest interior. The ‘‘edge’’ was considered to comprise a 100-m strip at the border of the forest and the ‘‘interior’’ at least 300 m in from this strip. In all plots, were cataloged, identified and measured the circumferences at height of the base at 30 cm from the soil of all shrub-arboreal individuals whose height were equal or greater than 1.0 meter and circumference at breast height at 1.30 m of soil, less than 15.0 cm. For the communities on the edge and forest interior were estimated: total density (TD), absolute density (AD), relative density (RD), total frequency (TF), absolute frequency (AF), relative frequency (RF), total dominance (TDo), absolute dominance (ADo), relative dominance (RDo), relative natural regeneration by height class (RNRij), total natural regeneration by height class (TNR), importance value index (IVI) and was performed the distribution analysis of individuals in three height classes using the Chi-square test with 95% significance. The sampled individuals were classified into family, genus, and species, and the species classified for the successional group (pioneers, initial secondary, late secondary or uncharacterized). Results: The environment of the edge showed the highest absolute density (10.240 ind.haˉ¹) to the forest interior (9.805 ind.haˉ¹). In both environments, it was found the high representativity of initial and late secondary species. The structural distributions of individuals by height class at the edge and interior environments showed curves shaped as inverted "J" indicating "dynamic balance" of the forest. Conclusion: The higher representativity of initial and late secondary species probably is due to the forest being in an advanced successional stage, having a structure with well-defined stratum. Among the shrub-arboreal species sampled which presented higher total natural regeneration per height class to both in the edge and forest interior and that can be used for the enrichment of areas in the recovery process of Atlantic Forest are Miconia prasina e Eschweilera ovata.

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