ANALYSIS OF FOREST FRAGMENTATION IN THE JI-PARANÁ WATERSHED, WESTERN AMAZON

Authors

DOI:

https://doi.org/10.5016/geografia.v47i1.16224

Abstract

This study analyzed the forest fragmentation through landscape ecology metrics in the Ji-Paraná watershed, Rondônia State. Data from classification of land use and occupation were provided by MapBiomas. Landscape ecology metrics were calculated using FRAGSTATS software. The analysed forest fragmentation consisted of four classes according to fragmente sizes, namely: less than 5 ha, between 5 and 10 ha, between 10 and 100 ha and larger than 100 ha, comparing the years 1985 and 2019. Furthermore, the men annual NDVI for each fragment size class was observed from Moderate Resolution Image Spectroradiometer data with a 500-m space resolution and a 16-day revisit using the Google Earth Engine platform. The analysis of landscape fragmentation showed an increase in the number of fragments smaller than 5 ha from 1985 to 2019, as well as an increase in the number of disjoint nuclear areas for all fragment classes. Moreover, it showed an increase in the distance between fragments larger than 100 ha. Regarding the NDVI, all fragment sizes showed significant differences when compared to fragments larger than 100 ha, which presented the highest values.

Author Biographies

Rodrigo Martins Moreira, Universidade Federal de Rondônia (UNIR)

Professor do Departamento de Engenharia Ambiental da UNIR. Doutor em Ciências da Engenharia Ambiental pela USP, com pós-doutorado em Recursos Naturais pela UFMS. 

Jéssica Lauany dos Santos Cesconetto, Universidade Federal de Rondônia (UNIR)

Engenheira Ambiental e Sanitarista - Universidade Federal de Rondônia.   

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Published

2022-07-18

Issue

Vol. 47 No. 1 (2022)

Section

Article

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The authors maintain the copyright and grant GEOGRAFIA the right of first publication, with the articles simultaneously licensed under the Creative Commons BY 4.0 License, which allows sharing and adapting the articles for any purpose, as long as appropriate credits and provisions of image rights, privacy or moral rights. Other legal attributions can be accessed at: https://creativecommons.org/licenses/by/4.0/legalcode.en.

 

Geography, Rio Claro, SP, Brazil - eISSN 1983-8700 is licensed under the Creative Commons BY 4.0 License.