Published online by Cambridge University Press: 04 December 2009
INTRODUCTION
Phylogeny affects conservation at multiple levels. At the level of the vision of conservation – of the long-term persistence of the processes that maintain biodiversity – phylogeny informs how we should represent these evolutionary processes (see, for example, Chapter 11). At the level of the goal of conservation – of representing the planet's biodiversity in a comprehensive conservation system – phylogeny reveals the units requiring representation (see, for example, Chapter 2). Finally, at the level of conservation strategies, phylogeny gives an extra dimension of biodiversity value that can be incorporated into conservation prioritisation (see, for example, Chapter 5). Here, we explore this third level.
Efficient biodiversity conservation requires systematic prioritisation of efforts; ad hoc planning has significant economic and societal costs (Pressey 1994). In a major review of systematic conservation planning, Margules & Pressey (2000) conceptualised the framework for conservation strategy as requiring two variables: ‘irreplaceability’ and ‘vulnerability’. Irreplaceability refers to uniqueness, or the extent to which a given biodiversity feature will be needed to contribute to a set of conservation values; vulnerability refers to threat, or probability of loss of biodiversity value (Pressey & Taffs 2001). This framework was originally conceived as operating across geographic space (i.e. applied to the prioritisation of sites, whether specific protected sites or broad biogeographic regions). Here, we extend the concept to application across phylogenetic space: prioritisation between species. Throughout this chapter, ‘irreplaceability’ and ‘uniqueness’ are used interchangeably, as are ‘vulnerability’ and ‘threat’.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.