51 research outputs found
Letters from L. L. Lewis, Barton O. Aylesworth, and B. C. Buffum
Letters of recommendation for Elmer D. Ball
Determinants of spread in an urban landscape by an introduced lizard
Context: Urban landscapes are a mixture of built structures, human-altered vegetation, and remnant semi-natural areas. The spatial arrangement of abiotic and biotic conditions resulting from urbanization doubtless influences the establishment and spread of non-native species in a city.
Objectives: We investigated the effects of habitat structure, thermal microclimates, and species coexistence on the spread of a non-native lizard (Anolis cristatellus) in the Miami metropolitan area of South Florida (USA).
Methods: We used transect surveys to estimate lizard occurrence and abundance on trees and to measure vegetation characteristics, and we assessed forest cover and impervious surface using GIS. We sampled lizard body temperatures, habitat use, and relative abundance at multiple sites.
Results: At least one of five Anolis species occupied 79 % of the 1035 trees surveyed in primarily residential areas, and non-native A. cristatellus occupied 25 % of trees. Presence and abundance of A. cristatellus were strongly associated with forest patches, dense vegetation, and high canopy cover, which produced cooler microclimates suitable for this species. Presence of A. cristatellus was negatively associated with the ecologically similar non-native A. sagrei, resulting in reduced abundance and a shift in perch use of A. cristatellus.
Conclusions: The limited spread of A. cristatellus in Miami over 35 years is due to the patchy, low-density distribution of wooded habitat, which limits dispersal by diffusion. The presence of congeners may also limit spread. Open habitats—some parks, yards and roadsides—contain few if any A. cristatellus, and colonization of isolated forest habitat appears to depend on human-mediated dispersal
Association between pain, neuropsychiatric symptoms, and physical function in dementia: a systematic review and meta-analysis
Behaviour of an air-assisted jet submitted to a transverse high-frequency acoustic field
An Analysis of Overstory Tree Canopy Cover in Sites Occupied by Native and Introduced Cottontails in the Northeastern United States with Recommendations for Habitat Management for New England Cottontail
Ecstasy and Sex Among Young Heterosexual Women: A Qualitative Analysis of Sensuality, Sexual Effects, and Sexual Risk Taking
Forest Grazing and Natural Regeneration in a Late Successional Broadleaved Community Forest in Bhutan
The Role of Mental Health Counselors in Promoting School–Family Collaboration Within the Tiered School-Wide Positive Behavioral Intervention and Support (SWPBIS) Model
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