Search results
Results from the WOW.Com Content Network
Urbanization over the past 500 years [13] A global map illustrating the first onset and spread of urban centres around the world, based on. [14]From the development of the earliest cities in Indus valley civilization, Mesopotamia and Egypt until the 18th century, an equilibrium existed between the vast majority of the population who were engaged in subsistence agriculture in a rural context ...
Urban evolution refers to the heritable genetic changes of populations in response to urban development and anthropogenic activities in urban areas. Urban evolution can be caused by non-random mating, mutation , genetic drift , gene flow , or evolution by natural selection . [ 1 ]
Urban ecology is the scientific study of the relation of living organisms with each other and their surroundings in an urban environment. An urban environment refers to environments dominated by high-density residential and commercial buildings, paved surfaces, and other urban-related factors that create a unique landscape. The goal of urban ...
There are two measures of the degree of urbanization of a population. The first, urban population, describes the percentage of the total population living in urban areas , as defined by the country. The second measure, rate of urbanization, describes the projected average rate of change of the size of the urban population over the given period ...
Urban history is a field of history that examines the historical nature of cities and towns, and the process of urbanization. The approach is often multidisciplinary, crossing boundaries into fields like social history , architectural history , urban sociology , urban geography , business history , and archaeology .
An urban area [a] is a human settlement with a high population density and an infrastructure of built environment. This is the core of a metropolitan statistical area in the United States, if it contains a population of more than 50,000. [2] Urban areas originate through urbanization, and researchers categorize them as cities, towns ...
This page was last edited on 22 December 2022, at 09:15 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
In biodiversity, the rural-urban gradient is sometimes also used to describe the species richness distribution along the gradient. It is known that for most groups of organisms when urbanization is high, species richness decreases. [7] However, when urbanization is at a low to medium level, species richness tends to increase. [7]