دانلود کتاب A Resource-Based Habitat View for Conservation: Butterflies in the British Landscape

Winner of the Marsh Book of the Year Award 2012 by the British Ecological Society.In A Resource-Based Habitat View for Conservation Roger Dennis introduces a novel approach to the understanding of habitats based on resources and conditions required by organisms and their access to them,  a quantum shift from simplistic and ineffectual notions of habitats as vegetation units or biotopes. In drawing attention to what organisms actually use and need in landscapes, it focuses on resource composition, structure and connectedness, all of which describe habitat quality and underpin landscape heterogeneity. This contrasts with the current bipolar view of landscapes made up of habitat patches and empty matrix but illustrates how such a metapopulation approach of isolated patchworks can grow by adopting the new habitat viewpoint. The book explores principles underlying this new definition of habitat, and the impact of habitat components on populations, species’ distributions, geographical ranges and range changes, with a view to conserving resources in landscapes for whole communities. It does this using the example of butterflies - the most alluring of insects, flagship organisms and key indicators of environmental health - in the British Isles, where they have been studied most intensively. The book forms essential reading for students, researchers and practitioners in ecology and conservation, particularly those concerned with managing sites and landscapes for wildlife. Content: Chapter 1 What is a Habitat? An Awkward Question (pages 1–8): Chapter 2 A Simple Model for Butterfly Habitats (pages 9–52): Chapter 3 Basic Principles for Butterfly Habitats (pages 53–78): Chapter 4 Exploiting Individual Resources (pages 79–99): Chapter 5 Butterfly Habitats: Searching for Order (pages 100–128): Chapter 6 The Habitat Context for Butterfly Populations (pages 129–164): Chapter 7 Landscape Influences on Butterfly Habitats (pages 165–210): Chapter 8 Habitat Issues in Butterfly Geographical Ranges (pages 211–255): Chapter 9 Habitats in Butterfly Conservation (pages 256–294):