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Contrasting changes in palatability following senescence of the lichenized fungi Lobaria pulmonaria and L. scrobiculata

Asplund, Johan and Wardle, David A. (2012). Contrasting changes in palatability following senescence of the lichenized fungi Lobaria pulmonaria and L. scrobiculata. Fungal Ecology. 5, 710–713
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Official URL: http://dx.doi.org/10.1016/j.funeco.2012.06.004

Abstract

Epiphytic lichens can contribute significantly to ecosystem nutrient input because they efficiently accumulate atmospheric mineral nutrients and, in the case of cyanolichens, also fix nitrogen. The rate at which carbon and other nutrients gained by lichens enters the ecosystem is determined by lichen litter decomposability and by invertebrate consumption of lichen litter. In turn, these processes are driven by the secondary compounds present in senesced lichens. Therefore, we explored how lichen palatability and concentrations of secondary compounds change with tissue senescence for Lobaria pulmonaria, a green algal lichen with cyanobacterial cephalodia, and L. scrobiculata, a cyanobacterial lichen. During senescence both lichens lost 38-48% of their stictic acid chemosyndrome, while m-scrobiculin and usnic acid in L. scrobiculata remained unchanged. Snails preferred senesced rather than fresh L. pulmonaria, while senesced L. scrobiculata were avoided. This provides evidence that species with labile secondary compounds will have higher turnover rates, through consumption and decomposition, than those producing more stable secondary compounds.

Authors/Creators:Asplund, Johan and Wardle, David A.
Title:Contrasting changes in palatability following senescence of the lichenized fungi Lobaria pulmonaria and L. scrobiculata
Series/Journal:Fungal Ecology (1754-5048)
Year of publishing :2 September 2012
Volume:5
Page range:710–713
Publisher:Elsevier
ISSN:1754-5048
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:F Plant production > F40 Plant ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Cepea hortensis, decomposition, gastropods, herbivory, secondary compounds, snails
URN:NBN:urn:nbn:se:slu:epsilon-e-645
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-645
Additional ID:
Type of IDID
DOI10.1016/j.funeco.2012.06.004
ID Code:9112
Department:(S) > Dept. of Forest Ecology and Management
External funders:Swedish Research Council
Deposited By: Dr Johan Asplund
Deposited On:04 Oct 2012 08:48
Metadata Last Modified:02 Dec 2014 10:52

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