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Previous issue date: 2017-05-15 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / As esp?cies de primata brasileiros Callicebus barbarabrownae, Callicebus coimbrai e
Sapajus xanthosternos est?o amea?adas de extin??o. Uma das causas desse cen?rio ? a
fragmenta??o das ?reas de ocorr?ncia dessas esp?cies na Caatinga e Mata Atl?ntica. Nesse
contexto, o presente estudo objetivou a) caracterizar os fragmentos com ocorr?ncia para
cada uma das tr?s esp?cies; b) comparar os fragmentos da ?rea de ocupa??o com os
demais fragmentos de sua extens?o de ocorr?ncia onde cada esp?cie est? inserida; c)
compar?-los entre si quanto as caracter?sticas dos fragmentos, considerando as diferen?as
inerentes a cada esp?cie e a cada bioma. Para identificar os fragmentos florestais da
extens?o de ocorr?ncia de cada esp?cie e identificar os fragmentos com presen?a
confirmada utilizou-se registros de ocorr?ncias das esp?cies obtidas atrav?s de
levantamento bibliogr?fico e imagens de sat?lite de ?ndice de Vegeta??o da Diferen?a
Normalizada (NDVI) disponibilizadas por Hansen et al (2013). Para caracterizar os
fragmentos foram utilizadas v?rias m?tricas da paisagem de forma e isolamento. As tr?s
esp?cies de primatas ocorreram usualmente em fragmentos pequenos, regulares e com
bordas complexas. Entretanto, quando se comparou com as suas respectivas ?reas de
extens?o de ocorr?ncia, as tr?s esp?cies estudadas usualmente ocorreram em fragmentos
com maior ?rea, forma mais regular, bordas mais complexas e muito isolados,
demonstrando que essas caracter?sticas do fragmento s?o importantes para a ocorr?ncia
desses primatas. Para C. coimbrai o tamanho do fragmento vizinho mais pr?ximo
mostrou-se mais importante que o isolamento. Seus fragmentos com ocorr?ncia tiveram
maior ?ndice de proximidade que os fragmentos de sua extens?o de ocorr?ncia, o que
infere em uma maior presen?a de fragmentos na matriz. Dentre as caracter?sticas
analisadas dos fragmentos a forma (per?metro/?rea e complexidade da borda) foi a mais
determinante na ocorr?ncia dessas tr?s esp?cies de primatas em ambientes fragmentados.
Depois da forma, as vari?veis explicativas mais importantes foram ?rea e isolamento (para
C. coimbrai). Ao comparar as tr?s esp?cies, observou-se que C. barbarabrownae habita
fragmentos menores, mais regulares, com bordas menos complexas e mais isolados que
as outras duas esp?cies, possivelmente por s? habitar um bioma com diferente hist?rico
de ocupa??o e altera??o, a Caatinga, enquanto as outras duas esp?cies que ocorrem
predominantemente ou somente na Mata Atl?ntica. C. coimbrai e S. xanthosternos
apresentaram fragmentos com ocorr?ncia com caracter?sticas de forma e isolamento
semelhantes, possivelmente por habitarem um mesmo bioma altamente fragmentado,
embora tenham diferen?as tanto no uso como em requerimentos de recursos. Portanto,
esses tr?s primatas requerem a cria??o de unidades de conserva??o que protejam
fragmentos que tenham as caracter?sticas de forma, ?rea e isolamento que determinam
suas presen?as e a cria??o de corredores ecol?gicos para aumentar a conectividade entre
os fragmentos, visto o grande isolamento dos fragmentos de suas respectivas ?reas de
ocupa??o. / The species of Brazilian primates Callicebus barbarabrownae, Callicebus coimbrai and
Sapajus xanthosternos are at risk of extinction. One of the causes of this scenario is the
fragmentation of the areas of occurrence of these species in the Caatinga and Mata
Atl?ntica. In this context, the present study has as objective a) characterize the fragments
with occurrence to each one of these three species; b) compare the fragments of the area
of occupation with the other of its extension of occurrence where each specie is covered;
c) compare the three species about the characteristics of the fragments, taking the inherent
differences to each specie and each biome. To identify the forest fragments of the
extension of occurrence of each species and identify the fragments with confirmed
presence it was utilized records of occurrence of the species and images of satellite of the
Normalized Difference Vegetation Index (NDVI) shared by Hansen at al (2013). To
characterize the fragments were utilized several metrics of the landscape, of form and of
isolation. These three species of primates usually occurred in small, regular and with
complex borders fragments. However, when it was compared with their respective
extension of occurrence areas, the three studied species usually occurred in fragments
with bigger area, more regular form and more complex and too isolated borders,
demonstrating that these primates do not occur by coincidence. To C. coimbrai the size
of the nearest neighboring fragment showed as more important than isolation. Their
fragments with occurrence have bigger rate of proximity than the fragments of extension
of occurrence, what infer in a bigger presence of fragments in the matrix. Among the
analyzed characteristics of the fragments, the form (perimeter/area and complexity of the
border) was the most determined in the occurrence of these three species of primates in
fragmented environments. After the form, the most important explanatory variables were
area and isolation (to C. coimbrai). When the there species were compared, it was
observed that C. barbarabrownae had inhabited smaller and more regular areas, with less
complex borders and more isolated than other two species, possibly because of its
inhabitation in Caatinga, when the other two species predominately or just occurred in
Mata Atl?ntica. C. coimbrai and S. xanthosternos showed fragments with similar
occurrence about their characteristics of form and isolation, possibly because they have
inhabited the same over-fragmented habitat despite that they have differences not only in
the use, as in the requirement of resources. Thus, these three primates require require the
creation of unites of conservation that protect fragments that has the characteristics of
form, area and isolation that determine their presences and the creation of ecological
corridors to increase the connectivity among the fragments, that has seen the large
isolation of the fragments in their respective areas of occupation.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23919 |
| Date | 15 May 2017 |
| Creators | Ferreira, Maryane Christina Silva Damasceno |
| Contributors | 01086633709, Jerusalinsky, Leandro, 89121309000, Cardoso, Marcio Zikan, 83953361791, Pinto, Miriam Plaza, Almeida, Adriana Monteiro de |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ECOLOGIA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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