SPATIAL DYNAMICS OF ATLANTIC FOREST FRAGMENTS IN A RIVER BASIN

Autores

  • Elfany Reis do Nascimento Lopes Federal University of the South of Bahia. Environmental Science Formation Center, Porto Seguro, Brazil. Science Enviromental Postgraduate Degree. Highway BR 367. KM 31. Rural Area. ZIP code 45810000. Porto Seguro, Bahia, Brazil. E-mail: elfany@ufsb.edu.br
  • Jocy Ana Paixão de Sousa Sorocaba São Paulo State University (UNESP), Institute of Science and Technology, Sorocaba. Geoprocessing and Environmental Mathematical Modeling Laboratory. 711, Three March Avenue. ZIP Code 18087-180. Sorocaba, São Paulo, Brazil. E-mail: jocy.sousa@unesp.br
  • José Carlos de Souza State Goiás University. HighWay BR153. Area Block. 199 Km. Anapólis, Goiás, Brazil. E-mail: jose.souza@ueg.com.br.
  • José Luiz Albuquerque Filho Technological Research Institute of São Paulo (IPT). 532, Prof. Almeida Prado. University City. ZIP Code 05508-901. São Paulo, São Paulo, Brazil.
  • Roberto Wagner Lourenço Sorocaba São Paulo State University (UNESP), Institute of Science and Technology, Sorocaba. Geoprocessing and Environmental Mathematical Modeling Laboratory. E-mail: roberto.lourenco@unesp.br

DOI:

https://doi.org/10.5380/rf.v50i1.61076

Palavras-chave:

Fragmentation. Water resources. Vegetation indices. Atlantic Forest.

Resumo

Considering the intrinsic relationship between vegetation and conservation of water resources, we evaluated the natural vegetation of an Atlantic Forest fragment through landscape metrics and spectral vegetation indices, indicating ways for its conservation in the Una river basin, Ibiúna, São Paulo, Brazil. We analyzed landscape metrics and the extraction of mean altitude, slope, and distance from the drainage network for each fragment based on the vectors of forest fragments in the river basin, using ArcGis 10.3. Normalized difference vegetation indices, photochemical production, and carbon flux were estimated by combining red, green, blue, and infrared spectral bands near the RapidEye satellite image. The results showed 197 fragments with sizes ranging from 1 to 306 hectares and irregularly shaped. The largest fragments are few in number, but account for 52% of the river basin's vegetation cover area. The vegetation presented high levels of biomass but moderate photosynthetic production, coinciding for a moderate carbon flux. The best scores were related to fragments at higher altitudes, in sloping areas next to drainage sites. Actions to conserve the fragments of larger areas and draw up environmental awareness measures should be encouraged, since high agricultural vocation may incite the reduction of these areas to increase economic production.

 

Biografia do Autor

Elfany Reis do Nascimento Lopes, Federal University of the South of Bahia. Environmental Science Formation Center, Porto Seguro, Brazil. Science Enviromental Postgraduate Degree. Highway BR 367. KM 31. Rural Area. ZIP code 45810000. Porto Seguro, Bahia, Brazil. E-mail: elfany@ufsb.edu.br

Doutor em Ciências Ambientais
Universidade Estadual Paulista Júlio de Mesquita Filho - Campus Sorocaba

José Carlos de Souza, State Goiás University. HighWay BR153. Area Block. 199 Km. Anapólis, Goiás, Brazil. E-mail: jose.souza@ueg.com.br.

Universidade Estadual de Goiás.

José Luiz Albuquerque Filho, Technological Research Institute of São Paulo (IPT). 532, Prof. Almeida Prado. University City. ZIP Code 05508-901. São Paulo, São Paulo, Brazil.

Instituto de Pesquisas Tecnológicas de São Paulo.

Roberto Wagner Lourenço, Sorocaba São Paulo State University (UNESP), Institute of Science and Technology, Sorocaba. Geoprocessing and Environmental Mathematical Modeling Laboratory. E-mail: roberto.lourenco@unesp.br

Universidade Estadual Paulista Júlio de Mesquita Filho - Campus Sorocaba.

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Publicado

20-12-2019

Como Citar

Lopes, E. R. do N., de Sousa, J. A. P., de Souza, J. C., Albuquerque Filho, J. L., & Lourenço, R. W. (2019). SPATIAL DYNAMICS OF ATLANTIC FOREST FRAGMENTS IN A RIVER BASIN. FLORESTA, 50(1), 1053–1062. https://doi.org/10.5380/rf.v50i1.61076

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