LATITUDINAL PATTERNS IN RANGE SIZES OF NEW WORLD WOODPECKERS

摘要: Abstract We used 4 analyses to examine latitudinal patterns in geographical range sizes of New World woodpeckers and test for the occurrence Rapoport's rule, which predicts an increase size ranges species with increasing latitude. Although details results varied among analyses, general were same. Smallest average occurred near 20°N, at more northerly (25°N 60°N) southerly (15°N 0°) latitudes. Trends less obvious within southern hemisphere, but generally, had larger between 0° 30°S than higher Therefore, although there is a positive gradient portion northern data do not support rule.