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  Model-based uncertainty in species range prediction »

  Our analyses show significant differences between predictions from different models, with predicted changes in range size by 2030 differing in both magnitude and direction (e.g. from 92 loss to 322 gain). We explain differences with reference to two characteristics of the modelling techniques: data input requirements (presence/absence vs. presence-only approaches) and assumptions made by each algorithm when extrapolating beyond the range of data used to build the model. The effects of these factors should be carefully considered when using this modelling approach to predict species ranges. Main conclusions We highlight an important source of uncertainty in assessments of the impacts of climate change on biodiversity and emphasize that model predictions should be interpreted in policy-guiding applications along with a full appreciation of uncertainty.

  Resource Type: Journal Papers
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  Patterns of isozyme variation as indicators of biogeographic history in Pilgerodendron uviferum (D. Don) Florin »

  The effects of Pleistocene glaciations on the genetic characteristics of the most austral conifer in the world, Pilgerodendron uviferum, were analysed with specific reference to the hypothesis that the species persisted locally in ice-free areas in temperate South America.

  Results indicated that Pilgerodendron populations are highly monomorphic, probably reflecting past population bottlenecks and reduced gene flow. Southernmost populations tend to be the least genetically variable and were therefore probably more affected by glacial activity than northern ones. Populations located outside ice limits seem to have been isolated during the glacial period. The presence of centres of genetic diversity, together with the lack of a significant correlation between genetic and geographical distances and the absence of geographical patterns of allelic frequencies at most analysed alleles, may indicate that Pilgerodendron did not advance southward after the last glaciation from a unique northern refugium, but spread from several surviving populations in ice-free areas in Patagonia instead.

  Resource Type: Journal Papers
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  CITES and the livelihoods of the poor »

  Recent CITES decisions that accepted an obligation to take into account the impacts of CITES listings on the livelihoods of the poor, have some affinities with the ‘Do no harm’ approach to the livelihoods of the poor. The process will produce guidelines and rapid assessment tools. If these guidelines and tools are to be effective they will need to take account of the context-specific nature of solutions in this area. The CITES case provides lessons for other international conservation institutions whose activities affect the livelihoods of the poor at the local level.

  Resource Type: Journal Papers
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  CITES Review of Significant Trade documents »

  UNEP-WCMC produces regular outputs of net trade in wild-collected fauna and flora listed on CITES Appendix II as part of the CITES Review of Significant Trade process.

   

  For the most recent Animals and Plants Committee meetings (AC25 and PC19), UNEP-WCMC also produced Reviews of Significant Trade for the species selected for review following CoP14.

  Resource Type: Reports
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  Publications »

  UNEP-WCMC produces reports for a number of fora including CITES, the European Commission and the Convention on the Conservation of Migratory Species of Wild Animals (CMS). Recent examples of these reports can be downloaded here in PDF format.

  Resource Type: Reports
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  CITES Listed Trees »

   A list of CITES-listed trees has been compiled by UNEP-WCMC.

  Resource Type: Tools / Applications