, 1998, cf. also Petit and Hampe, 2006). How many of these species are used by humans, or how many LDN193189 may become useful to human societies in the future remains an open question (Dawson et al., 2014, this issue). Some 2500–3500 tree species have been registered as forestry or agroforestry species (Burley and von Carlowitz, 1984 and Simons and Leakey, 2004). Many of them are used largely in their wild state with relatively few brought into cultivation. Even
fewer of them have ever been tested for population-level performance across different environments and very little is known about their genetic variation at any level; even their geographic distributions are often poorly documented
(Feeley and Silman, 2011). In addition, many of them are considered threatened. The International Panel on Climate Change (IPCC) estimates that 20–30% of plant and animal species will be at risk of extinction if temperatures climb more than 1.5 to 2.5 °C (IPCC, 2007, cf. also Ruhl, 2008). However, by the number of species alone, designing surveys to reveal intra-specific variation is obviously not an easy task. The most recent global survey on forest genetic resources has been prepared in connection with the preparation of the State of the World’s Forest Genetic Resources (FAO, 2010b and FAO, find more 2014). The Guidelines for the preparation of Country Reports for the State of the World’s Forest Genetic Resources Report (FAO, 2010b) include an Annex 2, which consists of table templates to assist the organization and presentation of information. We compared the set of indicators in our Table 2 (cf. also Table 5, later) with these templates to evaluate the degree to which data would have been collected to inform the indicators if all of the templates were completed
in the Annex 2 of FAO (2010b). Most of the requested data must be considered as input to response indicators, while one table can be seen as providing a state/pressure indicator. This is a table based on information requested on tree and other woody forest species considered to be threatened in all or part of their range from a genetic conservation perspective [Table Telomerase 7 in Annex 2 of the Guidelines document (FAO, 2010b)]. This set of information is relevant for the present review, because it can provide a set of verifiable indicators likely to be associated with the state indicators on species distribution and genetic diversity in Table 2 (cf. also Table 5: Trends in species and population distribution pattern of selected species). None of the table templates required genetic data that could show trends over time, for example population genetic parameters that could indicate gene flow trends, or quantitative trait variances that could indicate trends in the potential for adaptation.