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Monitoring of butterflies within a landscape context

Jonason, Dennis (2007). Monitoring of butterflies within a landscape context. Umeå: (S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
, Sveriges lantbruksuniversitet. Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik ; 192
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Abstract

Monitoring of butterflies is most often only directed towards the grassland fauna.
Species associated with other vegetation types, as well as the impact of the surrounding
landscape, often become neglected. The aim with this study was, in contrast, to
perform a novel landscape-based monitoring method for butterflies in diverse
vegetation types and more specifically
(i) evaluate the impact of environmental variables on butterfly abundance, (ii) compare
the distribution of butterflies in different vegetation types and (iii) analyse and improve
the monitoring method. Eight randomly placed study sites (750 m x 750 m) located in
south eastern Sweden were used. The vegetation composition inside the squares had
been assessed using aerial photos. Tree cover had largest impact on butterfly
abundance with a negative linear relationship between abundance and increasing tree
cover. Clear-cuts were the vegetation type harbouring the overall highest abundance
and diversity of butterflies. In semi-natural grasslands, where the nationally-based
monitoring of butterflies in Sweden currently is being performed, only 42% of the
species were found, indicating a bias directed towards only a part of the species pool.
The novel kind of monitoring presented here, using a landscape context, can, if
performed regularly, increase our knowledge of how structural changes at landscape
level affect butterflies and thereby improve the conservation efforts.

Authors/Creators:Jonason, Dennis
Title:Monitoring of butterflies within a landscape context
Series/Journal:Arbetsrapport / Sveriges lantbruksuniversitet, Institutionen för skoglig resurshushållning och geomatik (1401-1204)
Year of publishing :2007
Number:192
Number of Pages:23
Place of Publication:Umeå
Publisher:Instutionen för skoglig resurshushållning, Sveriges lantbruksuniversitet
ISSN:1401-1204
Language:English
Publication Type:Report
Full Text Status:Public
Agris subject categories.:L Animal production > L20 Animal ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Zoology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Agrovoc terms:lepidoptera, landscape, monitoring, nature conservation
Keywords:conservation, semi-natural grasslands, landscape perspective, Lepidoptera, rarefaction, vegetation type
URN:NBN:urn:nbn:se:slu:epsilon-e-663
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-663
ID Code:9148
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
Deposited By: Bo Jonsson
Deposited On:23 Oct 2012 12:45
Metadata Last Modified:06 Nov 2014 08:20

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