Biodiversity data obsolescence and land uses changes.

摘要: BACKGROUND Primary biodiversity records (PBR) are essential in many areas of scientific research as they document the through time and space. However, concerns about PBR quality fitness-for-use have grown, especially derived from taxonomical, geographical sampling effort biases. Nonetheless, temporal bias stemming data ageing has received less attention. We examine effect changes land use information currentness, therefore obsolescence, databases. METHODS created maps for three periods (1956-1985, 1985-2000 2000-2012) at 5-kilometres resolution. For each cell we calculated percentage change within period. then overlaid distribution small mammals, classified 'non-obsolete or 'obsolete,' depending on both amount cell, whether occurred after sampling's date. RESULTS A total 14,528 out initial 59,677 turned to be non-obsolete taking into account uses Navarra. These obsolete existed 115 156 cells analysed. Furthermore, more than one half remaining holding had not been visited least last fifteen years. CONCLUSION Land challenge actual obtainable datasets its potential uses. With passage time, can expect a steady increase availability biological records-but without them becoming older likely by changes. Therefore, it becomes necessary assess records' may jeopardize knowledge perception patterns.