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Simulated nitrogen ...
Simulated nitrogen deposition influences gastropod grazing in lichens
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Asplund, Johan (author)
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- Johansson, Otilia (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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Nybakken, Line (author)
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- Palmqvist, Kristin (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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Gauslaa, Yngvar (author)
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(creator_code:org_t)
- 2015-12-03
- 2010
- English.
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In: Ecoscience. - : Informa UK Limited. - 1195-6860. ; 17:1, s. 83-89
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.2...
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Abstract
Subject headings
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- Lichens are often important photosynthetic organisms in oligotrophic environments where high-quality fodder plants are rare. A strong herbivore defence and/or low nutritional quality allows the accumulation of a high lichen biomass in such areas. However, it is not known how N deposition influences lichen palatability. This study analyzes possible changes in gastropod grazing preference after 3 months simulated N deposition on 3 foliose (Lobaria scrobiculata, Platismatia glauca, and Xanthoria aureola) and 1 pendulous lichen species (Alectoria sarmentosa). Lichens were daily irrigated in the field with rainwater containing 1.625 mM NH4NO3 from June to September, equivalent to a deposition of 50 kg N·ha-1·y-1. Irrigations applied at night, morning, or noon simulated different C-gain regimes. Afterwards in the lab, we offered 2 common lichen-feeding gastropods the choice between N-fertilized thalli and control thalli irrigated with artificial rainwater. The gastropods clearly preferred the unfertilized thalli of the 3 foliose species. For the pendulous A. sarmentosa, the gastropods preferred N-enriched thalli (irrigated at night) to controls. In conclusion, N-enrichment changes the palatability of lichens in species-specific ways.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- Alectoria sarmentosa
- herbivory
- Lobaria scrobiculata
- mollusc
- Platismatia glauca
- Xanthoria aureola
- Alectoria sarmentosa
- herbivorie
- Lobaria scrobiculata
- mollusque
- Platismatia glauca
- Xanthoria aureola
Publication and Content Type
- ref (subject category)
- art (subject category)
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