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Impact: Assessing the ecological effects of invasive species

How and when to protect native species from exotic invaders: Lessons from a predictive model, August 1999

Urban ecology and the challenge of integrating social and ecological sciences

An ecosystem approach to understanding cities: Familiar foundations and uncharted frontiers

Regional and landscape-scale nitrogen budgets

Topic: Urban Modeling

Nonparametric spatial covariance functions: Estimation and testing

Spatial autocorrelation techniques are commonly used to describe genetic and ecological patterns. To improve statistical inference about spatial covariance, we propose a continuous nonparametric estimator of the covariance function in place of the spatial correlogram. The spline correlogram is an adaptation of a recent development in spatial statistics and is a generalization of the commonly used correlogram. We propose a bootstrap algorithm to erect a confidence envelope around the entire covariance function. The meaning of this envelope is discussed.

Dispersal, environmental correlation, and spatial synchrony in population dynamics

Stochastic population dynamics and time series analysis of abundance: Two case studies

Population dynamics and recurrent epidemics of the measles