Delaying conservation actions for improved knowledge: how long should we wait?
Article first published online: 20 FEB 2009
© 2009 Blackwell Publishing Ltd/CNRS
Volume 12, Issue 4, pages 293–301, April 2009
How to Cite
Grantham, H. S., Wilson, K. A., Moilanen, A., Rebelo, T. and Possingham, H. P. (2009), Delaying conservation actions for improved knowledge: how long should we wait?. Ecology Letters, 12: 293–301. doi: 10.1111/j.1461-0248.2009.01287.x
- Issue published online: 10 MAR 2009
- Article first published online: 20 FEB 2009
- Editor, Tim Benton Manuscript received 14 December 2008 First decision made 14 January 2009 Manuscript accepted 28 January 2009
- Biodiversity data;
- dynamic conservation planning;
- resource allocation;
Decisions about where conservation actions are implemented are based on incomplete knowledge about biodiversity. The Protea Atlas is a comprehensive database, containing information collated over a decade. Using this data set in a series of retrospective simulations, we compared the outcome from different scenarios of information gain, and habitat protection and loss, over a 20-year period. We assumed that there was no information on proteas at the beginning of the simulation but knowledge improved each year. Our aim was to find out how much time we should spend collecting data before protecting habitat when there is ongoing loss of habitat. We found that, in this case, surveying for more than 2 years rarely increased the effectiveness of conservation decisions in terms of representation of proteas in protected areas and retention within the landscape. If the delay is too long, it can sometimes be more effective just using a readily available habitat map. These results reveal the opportunity costs of delaying conservation action to improve knowledge.