Download Conserving Bird Biodiversity: General Principles and their by Ken Norris, Deborah J. Pain PDF

By Ken Norris, Deborah J. Pain

Trustworthy details is the root upon which neighborhood, nationwide and overseas conservation efforts are dependent, putting learn on the center of biodiversity conservation. the basic position of study is different and contains knowing the significance of biodiversity, defining 'units' of biodiversity, priority-setting for species and websites, dealing with endangered and declining populations, knowing large-scale approaches, making predictions in regards to the destiny, and interfacing with education, schooling, public expertise and coverage projects. utilizing actual examples, researchers give some thought to the rules underlying those manifold concerns and illustrate how those ideas were utilized to deal with real conservation difficulties.

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Extra resources for Conserving Bird Biodiversity: General Principles and their Application

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Valuing ecosystem services The need for evaluation of ecosystem services derives from the need to make choices about change. The voice for change will generally be based on a market assessment that the change will be beneficial. Net future gains will exceed costs. A mangrove forest will be cleared to develop a profitable shrimp farm. A cost--benefit analysis can show whether or not costs, including loss of ecosystem function, exceed benefits in terms of profit. Ethical values cannot be quantified and are thus difficult to argue for.

Predators regulate numbers of potential pests but they have become scarcer where, for instance, their field margin refuges have been removed to make more cropland, or pesticides have killed them. Though pesticides cost some US$25 billion per annum, and have such side effects as killing 220,000 people per annum, the same proportion of crops is lost as in pre-pesticide times (Naylor & Ehrlich 1997). Production of food and raw materials: Food gathered from the wild is still important to much of humanity, provided by biodiversity as a free good.

Should the views of experts be weighted more heavily? In spite of all the criticisms, contingent valuation is often the only way of measuring value so the pragmatist would argue for better development and understanding of this approach. For non-consumptive use values such as birdwatching, the travel cost method can be used. The idea is that you can interview visitors to a birdwatching site and find out what they paid to make their visit. Their costs will have been travelling, accommodation and entry fees.

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