chapter two
Source: Lautenbach, S., R. Seppelt, et al. (2012). “Spatial and Temporal Trends of Global Pollination Benefit.� PLoS ONE 7(4): e35954. (Creative Commons Attribution Licence) http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0035954 Values are given as US $ per hectare for the year 2000. The values have been corrected for inflation (to the year 2009) as well as for purchasing power parities. The area yields are related to is the total area of the raster cell.
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