Seasonal fecundity is not related to geographic position across a species' global range despite a central peak in abundance.

ABSTRACT: The range of a species is determined by the balance of its demographic rates across space. Population growth rates are widely hypothesized to be greatest at the geographic center of the species range, but indirect empirical support for this pattern using abundance as a proxy has been mixed, and demographic rates are rarely quantified on a large spatial scale. Therefore, the texture of how demographic rates of a species vary over its range remains an open question. We quantified seasonal fecundity of populations spanning the majority of the global range of a single species, the saltmarsh sparrow (Ammodramus caudacutus), which demonstrates a peak of abundance at the geographic center of its range. We used a novel, population projection method to estimate seasonal fecundity inclusive of seaso

SUBMITTER: Ruskin KJ 

PROVIDER: S-EPMC11209861 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature