Full text: Status of migratory wader populations in Africa and western Eurasia in the 1990s
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1 January 04
David A. Stroud, Nick C. Davidson, Rodney West, Derek A. Scott, Lieuwe Haanstra, Ole Thorup, B. Ganter, Simon Delaney
In its role as a global wader expert network for Wetlands International, the International wader Study Group undertakes the compilation and interpretation of wader population estimates (although the responsibility for data collation from the IWC resides with Wetlands International. WSG also acts as the wader Specialist Group for IUCN-The World Conservation Union’s Species Survival Commission.
For some years, the WSG has been involved in re-evaluating population sizes and trends of all species of migratory waders in Africa and Western Eurasia. To this end, technical workshops were held in Belgium in 1996 and in Hungary in 1998 associated with the Group’s annual conference.
The final results (which assessed 131 populations of 55 species) were incorporated into Wetlands International’s third edition of Waterbird Population Estimates – a publication that in November 2002 was launched at and endorsed by the eighth Conference of the Parties to the Ramsar Convention in Spain. Ramsar CoP8 urged governments and others to use these population data and derived 1% thresholds for the identification of sites of international importance. A fourth edition of WPE is due to be presented to Ramsar CoP9 in 2005.
The results were also included in the global; review of wader population status undertaken at WSG’s 2003 annual Conference in Spain, the results of which were summarised in the Cadiz Conclusions .
For the East Atlantic Flyway, this review updates the assessment made by Cor Smit and Theunis Piersma in the 1980s and which was published in 1989. For other flyway systems in Africa and Western Eurasia, there have been no prior systematic population reviews.