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Keyword: recruitment

Granivory of invasive, naturalized, and native plants in communities differentially susceptible to invasion

Publications Posted on: October 01, 2014
Seed predation is an important biotic filter that can influence abundance and spatial distributions of native species through differential effects on recruitment. This filter may also influence the relative abundance of nonnative plants within habitats and the communities' susceptibility to invasion via differences in granivore identity, abundance, and food preference.

Demography of Mexican spotted owls in the Sacramento Mountains, New Mexico

Publications Posted on: January 26, 2014
Information on population dynamics is key to gauging the status of threatened or endangered species. We monitored demography of a population of threatened Mexican spotted owls (Strix occidentalis lucida) in the Sacramento Mountains, New Mexico from 2003 to 2011.

Seed size and provenance mediate the joint effects of disturbance and seed predation on community assembly

Publications Posted on: September 26, 2013
Local plant community assembly is influenced by a series of filters that affect the recruitment and establishment of species. These filters include regional factors that limit seeds of any given species from reaching a local site as well as local interactions such as post-dispersal seed predation and disturbance, which dictate what species actually establish.

Biotic resistance: Exclusion of native rodent consumers releases populations of a weak invader

Publications Posted on: September 26, 2013
Biotic resistance is a commonly invoked hypothesis to explain why most exotic plant species naturalize at low abundance. Although numerous studies have documented negative impacts of native consumers on exotic plant performance, longer-term multi-generation studies are needed to understand how native consumer damage to exotics translates to their population-level suppression over large landscapes.

Biotic resistance via granivory: Establishment by invasive, naturalized, and native asters reflects generalist preference

Publications Posted on: March 20, 2012
Escape from specialist natural enemies is frequently invoked to explain exotic plant invasions, but little attention has been paid to how generalist consumers in the recipient range may influence invasion.

Is fledging success a reliable index of fitness in Northern Goshawks?

Publications Posted on: July 26, 2006
Fledging success is often assumed to be a reliable index of reproductive success (i.e., fitness) in the ornithological literature. We examined the validity of this assumption in a large population of Northern Goshawks (Accipiter gentilis) on the Kaibab Plateau, Arizona, at both the population and individual levels.