Science for Environment Policy features a policy brief explaining the biases around biodiversity databases in their latest issue 331, from 6 June 2013. "Biodiversity databases: language and location help explain biases" features a new study arguing that low numbers of English speakers, large distances from the database host and low security acting as key barriers to data collection and among the main reasons for the underrepresentation of some countries in biodiversity databases.
Source: Amano T., Sutherland W.J. (2013) Four barriers to the global understanding of biodiversity conservation: wealth, language, geographical location and security. Proceedings of the Royal Society B. 280: 20122649. doi: 10.1098/rspb.2012.2649