Similar regional-scale survival of tropical and southern temperate birds from the New World

FRANÇA, F.L.; C.C. DE OLIVEIRA E SILVA,; J.B. DE PINHO; N.P. PRESTES; CUETO, V.R.; M.A.S. ALVES; F. SCHUNCK; C. SUERTEGARAY FONTANA; C. LUGARINI; J. MARTINEZ; M.C. SAGARIO; J. LOPEZ DE CASENAVE; M.B. VECCHI; M. REPENNING; R.I. DIAS; D. CUNHA PASSOS

Oecologia

Springer Science and Business Media Deutschland GmbH

Año: 2023 vol. 202 p. 239 - 250

The general assumption that the survival patterns of tropical and southern temperate birds are similar lacks empirical datafrom higher latitudes. Regional comparisons of New World species are rare, and this assumption has been based on datafrom African studies. Here, we estimate the survival rates of 88 tropical and southern temperate bird populations (69 species) from eight localities in South America to evaluate the hypothesis that the survival of these populations is homogeneousat the regional scale. We estimated survival based on the Cormack-Jolly-Seber model and compared values from diferentenvironments. The survival estimates ranged from 0.30 to 0.80 (0.56 ± 0.12). Apparent survival did not difer signifcantlybetween low-latitude tropical environments (03°S) and the other sites from high-latitudes (between 22° and 34°S). Despitea predicted positive trend, body size was not signifcantly related to survival among passerines. On the other hand, phylogenetic relationships explained more than a third of the variation in bird survival. Based on the largest available database onSouth American bird species, our fndings support the hypothesis that bird survival is homogeneous, at the regional scale,along the southern hemisphere. In particular, we reinforce the hypothesis that climatic variation has a limited infuence onbird survival in the southern hemisphere