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Slåtterängar i Västra Götalands län: Resultat av övervakning 2000-2006
2009 (Swedish)Report (Other academic)
Abstract [sv]

Följande rapport är en sammanställning av återkommande vegetationsanalysersom genomförts i ett urval av slåtterängar i Västra Götalands län under 2000,2003, 2004, 2005 och 2006. Under 2004-2006 undersöktes 10 fasta objektårligen och ytterligare 20 objekt årligen som slumpvis valdes ut ur befintligdatabas över länets slåttermarker. I varje objekt placerades sedan en kvadratiskprovruta om 10x10 meter ut i ett för ängen "representativt avsnitt". I dennaruta lades sedan 10 mindre provrutor om 1 m2 ut enligt ett på förhand utslumpatmönster. Vegetationen i dessa provrutor dokumenterades sedan med hjälp avart-area analys. I varje provruta om 1 m2 bedömdes också mängden förna i enfyragradig skala efter täckningsgrad.Vid analysen delades de noterade växterna in i de ekologiska grupperingarnapollineringssätt, livsform och växtform. Artnoteringarna behandlades somförekomst/icke förekomst per provruta om 1 m2. Analys av artrikedom gjordesgenom att jämföra medelvärde (antal arter/m2) per provruta för respektiveobjekt. Som jämförelse gjordes även analys av ekologiska grupperingar av dearter som tas upp i Ekstam 1992. Förändringen över tid analyserades med linjärregressionsanalys. Skillnader mellan hävdade och ohävdade ängar analyseradesmed 2-vägs ANOVA, med hävd och fuktighet som faktorer.

Abstract [en]

The following report is a compilation of the vegetation analysis whichhas been carried out in a selection of traditionally cut hay meadows in theCounty of Västra Götaland in 2000, 2003, 2004, 2005 and 2006. In theyears 2004 to 2006, 10 permanent plots and an additional 20 sites randomlyselected from the existing County database of meadows were surveyedannually. In each site a quadrat 10m x 10m was placed in an area that wasconsidered to be "representative" for that meadow. In this larger quadrat,10 smaller quadrats 1 m2 were marked out according to a pre-preparedrandom pattern. The vegetation in these smaller squares was recorded usingthe sampling method known as the species-area method or relevé method.In each quadrat of 1 m2 the coverage of dead plant material was recordedaccording to scale of four.For the analysis, the plants recorded were divided into the followingecological groups: method of pollination, life form (according to Raunkier)and plant type (herb, grass, sedge etc.). The species recorded were treated aspresence/absence per small quadrat (1 m2). Analysis of species richness wascarried out by comparing the average (number of species/m2) per quadratfor each site. As a comparison, analysis of the ecological grouping of speciesaccording to Ekstam, 1992 was also carried out. Changes over time wereanalysed using linear regression analysis. The differences between managedand unmanaged meadows were analysed using 2-way ANOVA, withmanagement and soil moisture as factors.

Place, publisher, year, edition, pages
Länsstyrelsen Västra Götalands län , 2009. , p. 66
Series
Publikation / Länsstyrelsen Västra Götaland, ISSN 1403-168X ; 2009:82
National Category
Environmental Sciences
Research subject
Miljöövervakning, Agriculture
Identifiers
URN: urn:nbn:se:naturvardsverket:diva-7918OAI: oai:DiVA.org:naturvardsverket-7918DiVA, id: diva2:1263414
Available from: 2018-11-15 Created: 2018-11-15 Last updated: 2018-11-16Bibliographically approved

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Environmental Sciences

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