Ecography 25: 616 -- 625, 2002 (2007)
Accounting For Spatial, Timothy H. Keitt
this paper -- the statistical complication is that classical methods used to quantify environment-abundance associations assume independence of observations. However, the distribution or abundance of...
Keitt, Timothy H., Amaral, Luis A. N., Buldyrev, Sergey V., Stanley, H. E.
We consider statistical patterns of variation in growth rates for over 400 species of breeding birds across North America surveyed from 1966 to 1998. We report two results. First, the standard...
Dispersal, Environmental Correlation, and Spatial Synchrony in Population Dynamics. (2000)
Kendall, Bruce E., Bjørnstad, Ottar N., Bascompte, Jordi, Keitt, Timothy H., Fagan, William F.
Many species exhibit widespread spatial synchrony in population fluctuations. This pattern is of great ecological interest and can be a source of concern when the species is rare or endangered. Both...
Spectral representation of neutral landscapes (2000)
Pattern in ecological landscapes is often the result of different processes operating at different scales. Neutral landscape models were introduced in landscape ecology to differentiate patterns that...
Spatial Autocorrelation, Dispersal and the Maintenance of Source-Sink Populations (1997)
Populations may be regulated by both local densitydependent factors and spatial variation in habitat quality. I explore the influence of spatial autocorrelation in habitat quality on the survival of...
The introduced Hawaiian avifauna reconsidered: evidence for self-organized criticality (1996)
Timothy H. Keitt, Pablo A. Marquet
Over the last century, many bird species have been introduced into the Hawaiian islands. The data indicate a scenario in which island communities build up to a critical number of species above which...
Spatial complexity and critical phenomena in ecological systems /--by Timothy H. Keitt. (1995)
Thesis (Ph. D.)--University of New Mexico, 1995.
Keitt, Timothy H, Amaral, Luis A N, Buldyrev, Sergey V, Stanley, H Eugene
We consider statistical patterns of variation in growth rates for over 400 species of breeding birds across North America surveyed from 1966 to 1998. We report two results. First, the standard...
Spatial Autocorrelation, Dispersal, and the Maintenance of Source-Sink Populations
Populations may be regulated by both local density-dependent factors and spatial variation in habitat quality. I explore the influence of spatial autocorrelation in habitat quality on the survival of...
Dynamics of North American Breeding Bird Populations
Timothy H. Keitt, H. Eugene Stanley
The dynamics of biological populations often appear quite complex, exhibiting considerable year-to-year variation in local abundances. One approach to dealing with ecological complexity is to reduce...
Spectral Representation of Neutral Landscapes
Pattern in ecological landscapes is often the result of different processes operating at different scales. Neutral landscape models were introduced in landscape ecology to differentiate patterns that...
Stability and Complexity on a Lattice: Coexistence of Species in an Individual-Based Food Web Model
Theoretical studies of the stability of food webs have generally not incorporated space as a contingency affecting coexistence of species. Here, I considered the importance of spatial heterogeneity...
The Introduced Hawaiian Avifauna Reconsidered: Evidence for Self-Organized Criticality?
Timothy H. Keitt, Pablo A. Marquet
Over the last century, many bird species have been introduced into the Hawaiian islands. The data indicate a scenario in which island communities build up to a critical number of species above which...
Managing Fragmented Landscapes: A Macroscopic Approach
Timothy H. Keitt, Dean L. Urban, Bruce T. Milne
Habitat fragmentation is generally thought to be a leading cause of loss of biodiversity. In fragmented landscapes, maintenance of habitat connectivity is an important consideration in conservation...
Brooks, Christopher P., Holmes, Christopher, Kramer, Karen, Barnett, Barry, Keitt, Timothy H.
The highland forests of Madagascar are home to some of the world's most unique and diverse flora and fauna and to some of its poorest people. This juxtaposition of poverty and biodiversity is...