Breeding Birds in the Wadden Sea in 1996

Wadden Sea Ecosystem No. 10 - 2000

Results of a total survey in 1996 and of numbers of colony breeding species between 1991 and 1996.

Citation: LRasmussen, L.M., D. M. Fleet, B. Hälterlein, B.J. Koks, P. Potel & P. Südbeck 2000. Breeding Birds in the Wadden Sea in 1996 - Results of a total survey in 1996 and of numbers of colony breeding species between 1991 and 1996. Wadden Sea Ecosystem No. 10. Common Wadden Sea Secretariat, Trilateral Monitoring and Assessment Group, Joint Monitoring Group of Breeding Birds in the Wadden Sea. Wilhelmshaven, Germany.


Foreword

With the publication of this report, it is the second time that a complete breeding bird survey in the entire Wadden Sea is presented in the framework of Trilateral Monitoring and Assessment Program (TMAP) by the Joint Monitoring Group of Breeding Birds in the Wadden Sea (JMBB). The results of the first complete survey of breeding birds of the entire Wadden Sea in 1990 were published in 1994 as the first issue of the publication series 'Wadden Sea Ecosystems' edited by the Common Wadden Sea Secretariat (CWSS).

The current report is the tenth issue of the Wadden Sea Ecosystem series and includes the results of the 1996 total survey and the comparisons with the first survey five years ago. Furthermore, for the colony nesting species, changes in distribution and abundance are given for the first time on an annual basis for the period between 1991 and 1996. The report reflects the fact that the joint breeding bird monitoring program has now been operational for a longer period of time, allowing for the analysis of long term-series. The evaluation consists of three main parts: firstly, an overview on the basic information regarding the study area and the methods used in the 1996 survey; secondly, the results, which are given separately for each of the concerned 31 species; and thirdly, the discussion chapter, which confirms the outstanding significance of the breeding bird fauna of the entire Wadden Sea. It is shown that the breeding bird monitoring provides a mechanism for evaluating the nature conservation actions and achievements in the Wadden Sea.

Considering the huge data set and the limited available time for a trilateral evaluation and the compilation of the report by the members of the JMBB, the publication of the results - only four years after the survey - can be seen as a great accomplishment. We would like to thank all those who contributed to the surveys and the report, such as the field workers and organizations involved, the authors and, in particular, Lars Maltha Rasmussen. Only his continuous work input and enormous effort in handling the huge data set, evaluating the data and compiling the numerous figures and most of the text, made this report possible.

Bettina Reineking
Common Wadden Sea Secretariat
June 2000