masterThesis
Taxonomia e biogeografia da espécie politípica Herpsilochmus rufimarginatus (TEMMINCK, 1822) (Aves: THAMNOPHILIDAE)
Fecha
2013-06-28Registro en:
SILVA, Marcelo da. Taxonomia e biogeografia da espécie politípica Herpsilochmus rufimarginatus (TEMMINCK, 1822) (Aves: THAMNOPHILIDAE). 2013. 97 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal do Rio Grande do Norte, Natal, 2013.
Autor
Silva, Marcelo da
Resumen
The genus Herpsilochmus is composed mainly of cryptic species, among them is
Herpsilochmus rufimarginatus, which is currently represented by four subspecies: H. r.
rufimarginatus, H. r. frater, H. r. scapularis and H. r. exiguus. Differences in plumage and
vocalization suggest that there are more than one species involved in this complex. Thus this
and other subspecific taxa need urgent revision, the disjunct distribution of this species also
allows us to infer the relationship between birds that occur in this biome and / or different
centers of endemism. This study aims to make a taxonomic revision of the taxa included in
the complex time Herpsilochmus rufimarginatus based on morphological, morphometric,
vocals and geographical distribution of this bird. Besides creating distribution models current
potential and make the reconstruction of the distribution bygone using ecological niche
modeling, and testing the niche conservatism and divergence between different subspecies.
Consultations for examination of the skins of specimens of the museums: Museum of
Zoology, University of São Paulo (MZUSP), National Museum of Rio de Janeiro (MN) and
Emilio Goeldi Museum of Pará (MPEG), and the skins deposited at the collection of
Ornithological Federal University of Rio Grande do Norte (COUFRN). We studied the
following measures length of specimens: exposed culmen, culmen and total culmen nostril,
tarsus, wing and tail flattened. The voice analysis was performed with vocalizations banks
and / or digital banks people where 17 voice parameters were measured. This information and
more available in the literature were used to assemble a bunch of data under the limit
distribution of taxa and generate ecological niche models. This analyzes carried out in the
program Maxent, having as model selection criterion the AUC, and the models were greater
than 0.80 are considered good models. Environmental data for the realization of the modeling
were downloaded on the website of Worldclim. The morphometric information, vocals and
geographic distribution point for the separation of these taxa to be considering various uni and
multivariate analyzes. The potential distribution models performed well (AUC> 0.80), and its
distribution associated with environmental characteristics of the Amazon forest and Atlantic
forest (forests of south and southeast, northeast and forest). The reconstruction of the
distribution indicates a possible contact between the southern part of the Atlantic forest in the
northern part of the Amazon. The analysis of niche overlap showed a low overlap between
taxa and comparisons between the null model and the generated overlay link probably
occurring niche conservatism. The data suggest that the taxa that occur in the Amazon and
Atlantic forest represent three distinct species