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to a Research Project Ernest W. Burgess Abstract The aggregation of urban population has been described by Bucher and Weber. A soc- logical study of the growth of the city, however, is concerned with the de nition and description of processes, as those of (a) expansion, (b) metabolism, and (c) mobility. The typical tendency of urban growth is the expansion radially from its central business district by a series of concentric circles, as (a) the central business district, (b) a zone of deterioration, (c) a zone of workingmen s homes, (d)a residential area, and (e) a commuters zone. Urban...

"An ornithologist's personal look at farming practices that finds practical solutions for sustainable food production compatible with bird and wildlife conservation."--Provided by publisher.

One of the most striking and persistent ways humans dominate Earth is by changing land-cover as we settle a region. Much of our ecological understanding about this process comes from studies of birds, yet the existing literature is scattered, mostly decades old, and rarely synthesized or standardized.
The twenty-seven contributions authored by leaders in the fields of avian and urban ecology present a unique summary of current research on birds in settled environments ranging from wildlands to exurban, rural to urban. Ecologists, land managers, wildlife managers, evolutionary...

One of the most striking and persistent ways humans dominate Earth is by changing land-cover as we settle a region. Much of our ecological understanding about this process comes from studies of birds, yet the existing literature is scattered, mostly decades old, and rarely synthesized or standardized.
The twenty-seven contributions authored by leaders in the fields of avian and urban ecology present a unique summary of current research on birds in settled environments ranging from wildlands to exurban, rural to urban. Ecologists, land managers, wildlife managers, evolutionary...