Ccessibility of this major field of conservation biology.Aija Kukkala and Atte Moilanenwere retrieved inside the limits with the library access permissions with the University of Helsinki. We had been in a position to access around 90 of your 1834 publications found by this targeted search, providing us using a database of 1659 PDFs, covering years from 1980 to June, 2011. These publications consisted mainly of principal analysis papers, but also of testimonials, opinion pieces, and, to a lesser extent, book chapters and conference papers. Upon inspection, it was found that all except 1 of those research were relevant to spatial conservation in the broad sense, demonstrating a very good specificity of the search phrase. The targeted search was utilised as a beginning point for our investigation. A full text search was applied utilizing the Adobe Acrobat X and PowerGREP tools (Powergrep, 2011), and each and every mention of the core terms inside these 1659 PDFs was investigated. Therefore, we can be confident that a pretty broad literature base was covered completely. Literature chains had been followed outdoors the basic set when acceptable. Older articles and books not accessible in electronic text kind had been investigated manually. Known prior summaries into SCP or spatial conservation prioritisation were also integrated as starting points (Margules Pressey, 2000; Justus Sarkar, 2002; Sarkar et al., 2006; Margules Sarkar, 2007; Moilanen, 2008; Moilanen, Wilson Possingham, 2009d; Linke et al., 2011). We investigated each and every term by reviewing its historical heritage, when the term was initially mentioned, how it has been defined and discussed, and how definitions and usage have changed via time. This evaluation consists of verbatim quotes from original key publications to prevent errors in interpretation regarding the original definition. We have divided our timeline into three phases: (i) the historical period; (ii) the classical period; and (iii) the period of expansion. By the historical period we imply the period in the 1950s towards the end of the 1980s when the ideas underlying SCP concepts were forming however the present concepts had not yet been explicitly named and defined. By our definition, the classical period (1990s) was when most SCP concepts became firmly named and their early definitions have been discussed. The period from 2000 for the present is described as a period of expansion, reflecting consolidation from the field, a rapidly increasing publication count, in addition to a tendency of strategies to become far more inclusive of new evaluation attributes. This period starts from the influential work of Margules Pressey (2000), who formulated an early operational model of SCP, successfully bringing wide recognition to the field.II. Strategies We selected 12 main SCP terms to concentrate on: adequacy, comprehensiveness, representativeness, representation, (+)-Viroallosecurinine cost complementarity, threat, vulnerability, effectiveness, efficiency, irreplaceability, flexibility, and replacement expense. These are PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21337810 all ideas that show prominently within the literature on SCP and spatial prioritisation, but which might have variable definitions. We started our critique by collating comprehensive literature about SCP, spatial conservation prioritisation, spatial optimisation, as well as other topics connected to spatial allocation of conservation effort. We searched for citations from Thomson Reuters’ Web of Science by using the search: topic = [`reserve network’ OR (`reserve design’ AND conservation) OR `reserve selection’ OR `site choice algorithm’ OR ((.