Cities and towns are complex ecosystems with features that can vary dramatically in space time. Our knowledge of the spatial structure urban land ecological systems is expanding. These have been investigated across scales, to rural gradients, networks macrosystems, global megalopolises. However, temporal dimensions – such as those related cycles historical legacies far less understood investiga...

Campylobacter is a leading cause of diarrhoea, and its presence in chickens is a significant risk for zoonotic infection. Poultry production is becoming increasingly intensive in Ethiopia and is incorporating more high-producing breeds into traditionally managed smallholdings, especially in peri-urban areas. This cross-sectional study sampled 219 household environments in one peri-urban and two...

The analyses substantially delineating “integrative studies of large urban areas as biophysical-social complexes” and the suggestions by Pickett et al. in “Beyond Urban Legends” (Bioscience 2008 58 139-150) provide an initial framework for a theory of urban ecology. This article intends to contribute to the project by: 1) improving the philosophical rigor of critical concepts and epistemologies...

Urban agglomerations are places of increased emissions of anthropogenic pollutants into the atmosphere. Since most of these pollutants are harmful to humans, reduction of their ambient concentrations is a major issue of environmental policy on international, national, and local levels. According to Wiederkehr and Yoon (1998), air pollutants can be grouped into major and trace or hazardous air p...

0