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Article
Bernd-Olaf Flore, AuteurAt the artificial lake Alfsee (SW Lower Saxony, Germany; protected by EC Bird Directive) waterbirds are counted three times per month throughout the year. Numbers of resting Black-necked Grebes have increased since 1990, especially in some years[...]
Article
Stefan Garthe, Auteur ; Bernd-Olaf Flore, Auteur ; Bernd Haelterlein, Auteur ; Ommo Hueppop, Auteur ; Ulrike Kubetzki, Auteur ; Peter Suedbeck, AuteurBased on published literature and unpublished data for the second half of the 20th century, the population development of all gull species breeding at the German North Sea coast is described and analysed. Breeding populations of all gull species[...]
Article
Bernd-Olaf Flore, AuteurResults of long-term counts of gulls at an inland roost on Lake Alfsee, northwestern Germany (52 degrees 30'N, 7 degrees 59'E), are presented. Lake Alfsee is a flood detention basin of about 210 ha, the building was completed in 1982. It is loca[...]
Article
Stefan Garthe, Auteur ; Bernd-Olaf Flore, AuteurThe breeding population of the sandwich tern (Sterna sandvicensis) on the German North Sea coast has undergone substantial fluctuations throughout the last 100 years. Numbers of breeding birds were fluctuating quite strongly in the first 30 year[...]
