La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Ornithological comparison of the line transect and point count survey by results of the territory mapping method in the Bienwald forest
Auteurs :	Tobias Wirsing, Auteur
Type de document :	Article
Dans :	Vogelwarte (44(3) AUG 2006)
Article en page(s) :	159-169
Langues:	Allemand
Résumé :	In Germany, bird populations have predominantly been surveyed using the "Territory Mapping Method". Both, expensive and time consuming, this method is not appropriate for all surveys. Where populations dynamics of individual species or whole stocks are to be investigated (e.g. in seasonal or annual monitoring programs), the use of relative methods such as "Line Transect" or "Point Count Surveys" may produce better results while reducing the required time. The improvement is due to the superior standardization of the relative methods for many species and their potential use in large study areas.In 2004, a simultaneous comparison of the three most commonly employed mapping methods was carried out by a single mapper. The evaluation of the methods was based on the following parameters: number of recorded species, abundance, required time, extra observations and the possibility of reducing the number of inspections. Based on the results of the parameter analysis, the "Point Counts" proved to be the more advantageous of the two equally time consuming relative methods. Differences between the conclusions reached in this method comparison and with other studies demonstrate the need for further studies.

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