| Titre : | Vogelwelt (Die) 126(3) - 2005 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Jan van der Winden, Auteur
The strong decline of Black Terns breeding in oligotrophic mires is in some areas attributed to the lack of calcium in the chick period due to absence of fish in acidificated soft waters. The comparable strong decline in the South of The Netherl[...]
Article
Hermann Hoetker, Auteur ;
Claus Ivens, Auteur ;
Heike Koester, Auteur
The last stronghold of the breeding Population of Black Terns in Schleswig-Holstein (Germany) is the marshlands of the peninsula of Eiderstedt. The Black Tern population, however, is threatened there. In the breeding seasons of 2002 and 2003 we [...]
Article
Wilhelm Meier-Peithmann, Auteur
The population of Black Terns breeding in the Hannover Wendland (NE Lower Saxony) continuously decreased from (40-)50-60 pairs in the second half of the 1960s and tile beginning of the 1970s to an all time low of five pairs in 1996. Since then t[...]
Article
Wilfried Knief, Auteur ;
Olaf Ekeloef, Auteur ;
Claus Ivens, Auteur ;
Walther Petersen-Andresen, Auteur
Like in other parts of western central Europe populations of Black Terns breeding in Schleswig-Holstein decreased by 90% during the past 50 years, the present population being 100-120 pairs. The range of Black Terns in Schleswig-Holstein also de[...]
Article
Hermann Hoetker, Auteur ;
Jan van der Winden, Auteur
After a strong decline the size of the population of Black Terns breeding in Germany and the Netherlands remained stable between 1990 and 2003. The number of breeding pairs in Germany fluctuated between 832 and 1002 without any apparent trend. T[...]
Article
Jan van der Winden, Auteur
The Dutch Black Tern breeding population decline was more than 90% since 1950. This paper reviews the most important causes for decline in the Netherlands. These are deterioration of nesting substrate, increased human disturbance and related chi[...]
Article
Peter Suedbeck, Auteur ;
Dieter Wendt, Auteur
In 2004, Black Terns in Lower Saxony occurred at only four sites. Altogether, 132 pairs nested on shallow lakes, oxbows and peat bogs. The SPAs Ewiges Meer, Dummer, and Elbeniederung, designated in 2002, hosted 95% of the present population. Pro[...]
Article
Helmut Kruckenberg, Auteur
We investigated the period of time colour-marked juveniles spent with the parental European White-fronted Geese. The families stayed together as units, sometimes Lip to the 2(nd) or 3(rd) winter. First familiy bonds started separating from each [...]
Article
Ortwin Elle, Auteur
The slope of a location is an important factor in the habitat selection of the Skylark that modifies the effect of other habitat factors. Over a period of two years the influence of slope was quantitatively analysed on two farmland study plots i[...]
Article
Frank Koerner, Auteur ;
Ulrike Marxmeier, Auteur
Between 1950 and 1980 the breeding population of the Black Tern at the hypertrophic shallow Lake Dummer decreased from almost 200-250 pairs to about 20-30 pairs. Tile main reason for this decline was the continuous decrease of proper nesting sit[...]
