Caracterização de áreas prioritárias para conservação de Callicebus coimbrai (Primates) na Mata Atlântica nordestina
The objective of the study was to characterize the priority areas for the conservation of Callicebus coimbrai (known in english as Coimbra´s Titi or guigó de Coimbra-Filho in portuguese), an endangered, endemic species of the Northeastern Atlantic Forest. A total of 12 predefined priority areas were...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/43307 |
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| Resumo: | The objective of the study was to characterize the priority areas for the conservation of Callicebus coimbrai (known in english as Coimbra´s Titi or guigó de Coimbra-Filho in portuguese), an endangered, endemic species of the Northeastern Atlantic Forest. A total of 12 predefined priority areas were analyzed for landscape metrics in the RStudio program. The area of the priority areas polygons ranged from 2,192.77 ha to 120,935.43 ha. The dominant land use in all priority areas, with one exception, were agriculture and pasture. Most of the dense forest fragments (87.93%) occurring in the 12 studied areas measure less than 3 ha. Approximately 86.18% of the forest fragments had no core area, containing only border (considering a border width of 90 m). Only three priority areas had a total core area larger than the border area of the fragments. Polygons of larger priority areas showed the highest number of Atlantic Forest remnants (rs = 0.939, gl = 3, p = 0.001), and lower fragment density (rs = -0.664, p = 0.001, gl = 3, result for all the fragments). When analyzing the area of the fragments, both the median (ranging from 0.27 ha to 0.54 ha) and the mean (ranging from 2.28 ha to 13.5 ha) of the size of the fragments were strongly influenced by the large number of fragments smaller than the estimated area of life of the species (9.8 ha and 13.5 ha). After exclusion of the fragments smaller than 3 ha, 97% of the forest remained and both the median (ranged between 6.21 ha and 9.18 ha) and the mean (10.30 ha and 120.99 ha) of fragments sizes increased. Only 23 fragments in the polygons of priority areas are equal to 1,000 ha or larger, and are present in only half of the priority areas. Historically, the areas studied are environmentally impacted and very fragmented when compared to the entire Atlantic Forest. For this reason, it is necessary to take urgent measures to preserve these areas and also to carry out a restoration-oriented management focused on the connection of the large fragments, since these correspond to a small portion in the landscape and are essential for the conservation of Callicebus coimbrai. |
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