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Sothönans ( Fulica atra ) miljökrav vid häckning i utbredningsområdets randzon
Högskolan Dalarna, Akademin Utbildning och humaniora, Biologi.
2006 (svensk)Independent thesis Basic level (degree of Bachelor)Oppgave
Abstract [sv]

In Sweden you will find the coot chiefly in the southern parts. The species winters in the southern part of the Baltic Sea and along the coasts of northern Europe. The number of coots is heavily decreased by harsh winters. The population of the coots in Sweden is estimated to 20 000 to 30 000 pairs. The region of Dalarna is the random zone for the breeding of coots in Sweden . During the summer of 2006 the coot was reported to reproduce in at least 31 lakes and rivers preferably in the southern part of the Dalarna region. From Lake Brunnsjön at least 50 pairs of coots were reported. Lake Brunnsjön is by far the most nutrient rich lake in Dalarna. From the three lakes that are included in the study, namely Lake Glistjärn, Lake Limsjön and Lake Kyrkbytjärn, the water analysis shows high pH values, well-buffered waters and meso- trophic waters. The number of successful breedings was eleven. Lake Glistjärn zero breeding, Lake Limsjön four and Lake Kyrkbytjärn seven breedings. The northernmost lake in Dalarna where breeding occurred is Lake Limsjön.

sted, utgiver, år, opplag, sider
Falun, 2006. , s. 34
Emneord [sv]
Sothöna, Fulica atra, häckning, vegetationsrika sjöar, algblomning, essentiella fettsyror.
Identifikatorer
URN: urn:nbn:se:du-2497OAI: oai:dalea.du.se:2497DiVA, id: diva2:518186
Uppsök
Life Earth Science
Veileder
Tilgjengelig fra: 2007-02-12 Laget: 2007-02-12 Sist oppdatert: 2012-04-24bibliografisk kontrollert

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