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Author: Ma. Carmen Ruiz de Villa Jubany
Publisher:
ISBN:
Category :
Languages : es
Pages : 95
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Book Description
Author: Ma. Carmen Ruiz de Villa Jubany
Publisher:
ISBN:
Category :
Languages : es
Pages : 95
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Book Description
Author: Sergi Sabater
Publisher: Springer
ISBN: 3642309399
Category : Science
Languages : en
Pages : 381
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Book Description
The Llobregat belongs to the most thoroughly studied rivers in Europe and is a paradigm of the confluence of human and natural disturbances in a single basin. Because of its location in a very densely populated region and its Mediterranean character, the Llobregat supports a mixture of irregular flow, water abstraction, excess nutrients, mining debris, and a wide array of pollutants. The aquatic organisms strive to survive in a dramatically changing river that passes through a succession of dams, weirs and channels. The long-term river monitoring as well as the research that has been carried out in the river for a long time have provided an extensive knowledge of these disturbances and their effects on the biological communities. This book highlights the available information, with emphasis on the hydrological, chemical and biological elements interspersed in the river. Experts in the field discuss the main nutrient patterns and pollutant occurrence and the responses of the biological quality elements as well as the river ecosystem to the overall natural and man-made influences.
Author:
Publisher:
ISBN:
Category : Entomology
Languages : es
Pages : 812
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Book Description
Author: David L. Hawksworth
Publisher: Springer Science & Business Media
ISBN: 1402064446
Category : Science
Languages : en
Pages : 421
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Book Description
Original studies address key aspects of the conservation and biodiversity of plants. Articles are all peer-reviewed primary research papers, contributed by leading biodiversity researchers from around the world. Collectively, these articles provide a snapshot of the major issues and activities in global plant conservation. Many of the articles can serve as excellent case studies for courses in ecology, restoration, biodiversity, and conservation.
Author: Fernando Collantes
Publisher: Cambridge Scholars Publishing
ISBN: 1443831360
Category : Business & Economics
Languages : en
Pages : 215
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Book Description
Migration to the cities had been a part of European rural life long before the start of modern industrialisation and urbanisation. In the era of modern development, however, rural-urban migration intensified in an unprecedented way and many rural communities depopulated. While during the pre-industrial period migration had contributed to the economic and social reproduction of rural communities, it now challenged the continuity of the rural lifestyle. This book analyses the topic for the case of Spain, which in the twentieth century experienced one of the most intense processes of rural depopulation in modern Europe. The interaction between Spanish industrialisation and rural migration, the demographic implications of agrarian change, the obstacles to the development of rural non-farm activities, the rural problems of access to infrastructures and services, the role of public policy, and the consequences of depopulation for the rural community are the central elements of this study, which inserts the Spanish case within its European context. Distanced from both the anti-modern stance that idealises paradise lost and the Panglossian mood that welcomes anything that came with modernisation, the book explains how the adaptive strategies put into practice by rural populations led to a “peaceful surrender” of traditional rural society.
Author: Sven Björk
Publisher:
ISBN: 9783510652921
Category : Aquatic ecology
Languages : en
Pages : 381
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Author: Mayra Montero
Publisher:
ISBN:
Category : Fiction
Languages : en
Pages : 200
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Book Description
"In the Palm of Darkness" tells the story of American herpetologist Victor Griggs and Haitian guide Thierry Adrien, who are searching for an amphibian known as the blood frog in the mountains of violence-torn Haiti. The rich and tragic tale of Thierry's family, his life and loves, and his curious destiny, forms a backdrop for the obsessive search of the two men from different cultures and opens a window onto another way of understanding the world.
Author: Albert Schwartz
Publisher: Society for the Study of Amphibians & Reptiles
ISBN: 9780916984373
Category : Amphibians
Languages : en
Pages : 0
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Author: Howard Barnum
Publisher: Johns Hopkins University Press
ISBN:
Category : Business & Economics
Languages : en
Pages : 134
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Book Description
A model addressing agricultural responses to public interventions is described. The model is confined to the short run, and it allows an assessment of the policy significance of changes in five variables that are exogenous to the household. The first variable is the price of the main agricultural output, emphasizing the elasticities of both output and market surplus; the second is the wage rate for agricultural labor, focusing on the elasticities of household labor supply and demand for hired labor; the third is the size of the family labor force, which is essential for estimating shadow wage rates; the fourth is the number of dependents, in order to permit an assessment of family planning policies; and the final variable is technology. The main features of the model are the role of the labor market, household production, household consumption, and the aggregate effect of household responses. Applicaton of the model to the Muda River Valley demonstrates that it is appropriate to a number of policy isues ranging from output price intervention to technological innovaton. Specifically, the model indicates that the economic cost of rural to urban migration is small when compared to the marginal productivity of the migrant before his departure.
Author: Dietrich Darr
Publisher:
ISBN: 9783823615545
Category : Agricultural extension work
Languages : en
Pages : 163
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Book Description
