Artikel-Suche

Christen, W.

Die Bedeutung der Aareebene bei Solothurn als Rastplatz für Limikolen.

2011

108

9–36

Key words
(von 1994 bis 2006 vergeben)

Durchzug, Phänologie, Zugintensität, Zugmedian, Bestandesentwicklung, Rastplatz, Rasthabitat, Störungen, Aufenthaltsdauer

Schlagwort_Vogelart
(wissenschaftlich)

Vanellus vanellus, Gallinago gallinago, Philomachus pugnax, Actitis hypoleucos, Tringa glareola, Tringa ochropus, Charadrius dubius, Tringa nebularia, Tringa totanus, Numenius arquata, Pluvialis apricaria, Calidris alpina, Limosa limosa, Charadrius hiaticula, Calidris minuta, Tringa erythropus, Lymnocryptes minimus, Numenius phaeopus, Calidris temminckii, Calidris ferruginea, Pluvialis squatarola, Himantopus himantopus, Burhinus oedicnemus, Limosa lapponica, Arenaria interpres, Calidris alba, Charadrius morinellus, Xenus cinereus, Gallinago media, Scolopax rusticola, Tryngites subruficollis, Recurvirostra avosetta, Calidris canutus, Tringa stagnatilis, Haematopus ostralegus, Charadrius alexandrinus, Glareola sp.

Schlagwort_Vogelart
(deutsch)

Kiebitz, Bekassine, Kampfläufer, Flussuferläufer, Bruchwasserläufer, Waldwasserläufer, Flussregenpfeifer, Grünschenkel, Rotschenkel, Grosser Brachvogel, Goldregenpfeifer, Alpenstrandläufer, Uferschnepfe, Sandregenpfeifer, Zwergstrandläufer, Dunkler Wasserläufer, Zwergschnepfe, Regenbrachvogel, Temminckstrandläufer, Sichelstrandläufer, Kiebitzregenpfeifer, Stelzenläufer, Triel, Pfuhlschnepfe, Steinwälzer, Sanderling, Mornellregenpfeifer, Terekwasserläufer, Doppelschnepfe, Waldschnepfe, Grasläufer, Säbelschnäbler, Knutt, Teichwasserläufer, Austernfischer, Seeregenpfeifer, Unbestimmte Brachschwalbe

Schweiz, Bern, Solothurn, Aare­ebene, Witi

deutsch

Abhandlung

The importance of the Aare plain near Solothurn (Swiss Plateau) as a stop-over site for waders. – The Aare plain between Büren a.A. (canton of Berne) and Solothurn (canton of Solothurn) covers an area of 32 km2 of mainly agricultural land. After snow melt and intensive rainfall patches of land are flooded and attract numerous waders migrating across Switzerland. From 1981 to 2009 an overall number of 23827 individuals from 36 species (excluding Northern Lapwing) were recorded. The occurrence of waders varied greatly between years and across the seasons, depending on the availability of suitable habitats. On average, 17 (11–24) species were recorded per year. The sum of the maximum number of birds per five-day period amounted to 550 (155–2041). During periods of rainfall for several days migratory birds are held up, which results in high numbers of birds interrupting their migration. With 49 % of all observed individuals Common Snipe was by far the most abundant species, followed by Ruff (9 %), Common Sandpiper (8 %), Wood and Green Sandpiper (6 % each). The sums of the maximum numbers per five-day period indicated comparable intensities of spring (first half of the year) and autumn (second half of the year) migration in the long term. The largest numbers of waders were recorded on flooded patches in agricultural land (60 %), followed by the bank and the islands of the river Aare (14 %), agricultural land and other sites (11 %), «air», i.e. birds recorded in flight (7 %), ditches and ponds (6 %), and algal mats on the river (2 %). In the second half of the 1980s the Aare plain was evaluated as the third most important stop-over site for waders in Switzerland. It is doubtful whether this is still the case. Drainage projects in 1989 led to a marked reduction in temporarily flooded areas. When birds are disturbed, alternative refuge sites are lacking and birds leave the area. Out of the 14 most abundant species 9 showed a decrease of over 40 % between the periods 1981–1995 and 1996–2009, namely Black-tailed Godwit (–97 %), Common Redshank (–69 %), Ruff (–68 %), Spotted Redshank, Eurasian Curlew, Common Snipe, Dunlin, Little Stint and Common Ringed Plover.