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Stormusslor i Kilaån 2004 och 2005: Utbredning av tjockskalig målarmussla och flat dammussla - hotstatus samt åtgärdsförslag till bevarande i Kilaådalen, Södermanlands län
Stockholm University, Stockholm Resilience Centre.
2005 (Swedish)Report (Other academic)
Abstract [sv]

Mål & syfte

Studien har haft som syfte att på ett mer systematiskt sätt kartlägga förekomst och reel lutbredning av stormusselfaunan i Kilaån med tonvikt på tjockskalig målarmussla och flatdammussla. Dessutom har vi försökt utreda om föryngring sker.

Det inventerade området omfattarca 30 km åsträckor i Ålbergaån, Vretaån, Kilaån samt Hannsjöbäcken. Totalt inventerades 54 lokaler (Figur 3) med en sammanlagd yta om 5770m2.

Resultat

Kilaån har med avseende på stormusselfauna hög artdiversitet. Under inventeringarna påträffades sex av sju i Sverige naturligt förekommande arter (Tabell 1). 

Abstract [en]

Aim of the study

The aim of this study was to investigate the status regarding distribution and species composition of major mussels in the Kilaå River in the Province of Södermanland, Eastern Sweden, with special emphasis on rare and red listed species.

Earlier studies have revealed that all seven naturally occurring species have been found in the Kilaå River System. The findings of the pearl mussel (Margaritifera margaritifera) are only of shells, and the species is probably extinct in the river system. The Kilaå River System thus has an exceptionally rich diversity of major mussels, giving the River System a very high national and international conservation value.

Results

The Kilaå River System was found to have rich mussel species diversity, with findings of six of the seven species naturally occurring in Swedish waters.

These were thick-shelled river mussel (Unio crassus), depressed river mussel (Pseudanodonta complanata), common painter mussel (Unio pictorum), bulbous river mussel (Unio tumidus), larger pond mussel/swan mussel (Anodonta cygnea) and common pond mussel/duck mussel (Anodonta anatina).

Place, publisher, year, edition, pages
Nyköping: Naturvård, Länsstyrelsen i Södermanlands län , 2005. , 29 p.
Series
Rapport / Länsstyrelsen, Södermanlands län, ISSN 1400-0792 ; 2005:8
Keyword [en]
IUCN, red list, freshwater mussel, species diversity, threatened, Natura 2000, reproductive strategy, programme of measures, ecosystem, biota, conversation value
Keyword [sv]
stormussla, utbredning, tjocksksalig målarmussla, flat dammussla, hotstatus, storleksklass, föryngring, population, reproduktion, fridlyst, rödlistad, inventering, artdiversitet, IUCN, biotopkartering
National Category
Ecology Zoology
Research subject
Systems Ecology
Identifiers
URN: urn:nbn:se:su:diva-128721OAI: oai:DiVA.org:su-128721DiVA: diva2:916179
Projects
Åtgärdsprogram för hotade arter
Funder
Swedish Environmental Protection Agency
Available from: 2016-04-01 Created: 2016-04-01 Last updated: 2017-02-03Bibliographically approved

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