Extracting trends from biological recording data

These are the slides of a talk presented at the National Biodiversity Network Conference in London on 23 November 2012.

Please note that results presented near the end of the talk are extremely preliminary and have now been superseded. 

The full version of the talk is available to view at http://www.youtube.com/watch?feature=player_embedded&v=oIiUsyAQfpE from 01:48:03 - 02:23:08