The author traces the development of low-incoming housing zones in the city of Nairobi (Kenya), which were initially shaped by the exclusive urban policies of the British Colonial Government, and further influenced by minimum standards codes established after Independence. Using a random sample of 1,480 heads of households, the author examines zones of entry into the city, with a view to identi...

Animal dispersal is usually studied with capture-mark-reencounter data, which provide information on realized dispersal but rarely on underlying processes. In this context, the unreliable assumption of all habitat being available is usually made when describing and analysing dispersal patterns. However, actual settlement options may be constrained by the spatial distribution of appropriate patc...

Dispersal of propagules from fertile thalli of Sargassum spinuligerum was measured in situ using a novel technique. Propagules were stained with Toluidine Blue while still attached to parent thalli. After 24 h, the density of settled propagules was determined at different distances from the stained thalli with a venturi suction sampler Previous measurements of propagule or spore dispersal have ...

We use a central place forager model for shellfish processing to understand Middle Holocene (7550– 3600 cal BP) human settlement patterns on California’s Northern Channel Islands. This period was associated with increasing sedentism and special purpose sites. We examine the processing and transport costs of two high-ranked shellfish species collected during the Middle Holocene, red abalone (Hal...

Investigating Settlement Patterns in Silveh Region of Piranshahr, South Lake Urmia based GIS analysis

Edge effects are a dominant subject in landscape ecology literature, yet they are highly variable and poorly understood. Often, the literature suggests simple models for edge effects-positive (enhancement at the edge), negative (enhancement at the interior), or no effect (neutral)--on a variety of metrics, including abundance, diversity, and mortality. In the marine realm, much of this work has...

Settlement and growth of quagga mussels Dreissena rostriformis bugensis were monitored in Lake Mead, NV, USA, where the first dreissenid occurrence was confirmed in the western United States. To measure the settlement rate of these invasive mussels, seven acrylonitrile butadiene styrene (ABS) pipes were attached to a line in shallow water (7.7 m below the surface) since November 23, 2007; eight...