LATITUDINAL PATTERNS IN RANGE SIZES OF NEW WORLD WOODPECKERS
- 1 March 2003
- journal article
- Published by Southwestern Association of Naturalists in The Southwestern Naturalist
- Vol. 48 (1), 61-69
- https://doi.org/10.1894/0038-4909(2003)048<0061:lpirso>2.0.co;2
Abstract
We used 4 analyses to examine latitudinal patterns in geographical range sizes of New World woodpeckers and to test for the occurrence of Rapoport's rule, which predicts an increase in size of geographical ranges of species with increasing latitude. Although details of results varied among analyses, general patterns were the same. Smallest average range sizes occurred near 20°N, increasing in average size at more northerly (25°N to 60°N) and southerly (15°N to 0°) latitudes. Trends were less obvious within the southern hemisphere, but generally, species had larger average range sizes between 0° and 30°S than at higher latitudes. Therefore, although there is a positive latitudinal gradient for a portion of the northern hemisphere, data in general do not support Rapoport's rule. Usamos 4 análisis para examinar los patrones latitudinales del tamaño de las distribuciones geográficas de pájaros carpinteros del Nuevo Mundo para probar la regla de Rapoport, que predice el incremento del tamaño de las distribuciones geográficas de especies con un incremento de latitud. Aunque los detalles de los resultados variaron entre los analisis, los patrones generales fueron iguales. Los tamaños promedio más pequeños de distribución se encontraron cerca a 20°N, aumentando el tamaño promedio hacia latitudes más al norte (25°N a 60°N) y al sur (15°N a 0°). Las tendencies fueron menos obvias en el hemisferio sur, pero en general, las especies tuvieron tamaños promedios de distribución más grandes entre 0° y 30°S que en latitudes más altas. Aunque existe un incremento de tamaño asociado positivamente a la latitud para una porción del hemisferio norte, en general los datos no apoyan la regla de Rapoport.Keywords
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