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Author:
Publisher:
ISBN: 9786165518000
Category :
Languages : en
Pages : 294
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Book Description
Author:
Publisher:
ISBN: 9786165518000
Category :
Languages : en
Pages : 294
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Book Description
Author: Dinarzarde C. Raheem
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: S. C. Mitra
Publisher:
ISBN:
Category : Snails
Languages : en
Pages : 356
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Book Description
Author: Sir John William Dawson
Publisher:
ISBN:
Category : Gastropoda, Fossil
Languages : en
Pages : 415
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Book Description
Author: S. K. Raut
Publisher:
ISBN:
Category : Agricultural pests
Languages : en
Pages : 196
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Book Description
Author: Kazunori Yamazaki
Publisher:
ISBN: 9781775573074
Category : Mesogastropoda
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
Author: David Dudgeon
Publisher: Cambridge University Press
ISBN: 1108882625
Category : Nature
Languages : en
Pages : 517
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Book Description
Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.
Author: Fred Naggs
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251312702
Category : Political Science
Languages : en
Pages : 576
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Book Description
The State of the World's Biodiversity for Food and Agriculture presents the first global assessment of biodiversity for food and agriculture worldwide. Biodiversity for food and agriculture is the diversity of plants, animals and micro-organisms at genetic, species and ecosystem levels, present in and around crop, livestock, forest and aquatic production systems. It is essential to the structure, functions and processes of these systems, to livelihoods and food security, and to the supply of a wide range of ecosystem services. It has been managed or influenced by farmers, livestock keepers, forest dwellers, fish farmers and fisherfolk for hundreds of generations. Prepared through a participatory, country-driven process, the report draws on information from 91 country reports to provide a description of the roles and importance of biodiversity for food and agriculture, the drivers of change affecting it and its current status and trends. It describes the state of efforts to promote the sustainable use and conservation of biodiversity for food and agriculture, including through the development of supporting policies, legal frameworks, institutions and capacities. It concludes with a discussion of needs and challenges in the future management of biodiversity for food and agriculture. The report complements other global assessments prepared under the auspices of the Commission on Genetic Resources for Food and Agriculture, which have focused on the state of genetic resources within particular sectors of food and agriculture.
