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Nutrient availability and the carnivorous habit in Utricularia vulgaris.

Kibriya, Sadia; Jones, J Iwan. 2007 Nutrient availability and the carnivorous habit in Utricularia vulgaris. Freshwater Biology, 52 (3). 500-509. 10.1111/j.1365-2427.2006.01719.x

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Abstract/Summary

1. Carnivory in plants is thought to enhance growth through an increased supply of nutrients, although there are considerable costs involved. It has been assumed that the relative investment of biomass in traps is inversely proportional to the availability of nutrients from non-carnivorous sources. Our aim was to test the effect of increasing nutrient concentration on investment in carnivory by Utricularia vulgaris. 2. Plants were grown under controlled conditions and nitrogen and phosphorus added at three loadings in a crossed design. Investment in carnivory was assessed as the proportion of (i) leaf biomass and (ii) leaf area comprising traps. 3. There was no effect of nutrient additions on plant growth or periphyton abundance. Investment in carnivory declined with increasing phosphorus loading. There was no effect of nitrogen, despite this being the nutrient commonly thought to be sought by carnivorous plants. Analysis of previously published data also indicated a decline in investment with increasing P availability. 4. Investment in carnivory in U. vulgaris is inversely proportional to the availability of phosphorus from non-carnivorous sources.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1111/j.1365-2427.2006.01719.x
Programmes: CEH Programmes pre-2009 publications > Water > WA02 Quantifying processes that link water quality and quantity, biota and physical environment > WA02.3 Physico-chemical processes and effects on freshwater biot
CEH Programmes pre-2009 publications > Water > WA02 Quantifying processes that link water quality and quantity, biota and physical environment > WA02.4 Biological interactions
CEH Sections: Acreman
ISSN: 0046-5070
Additional Keywords: bladderwort, carnivorous plant, investment, macrophyte, nutrients, prey, traps, Utricularia vulgaris
NORA Subject Terms: Botany
Ecology and Environment
Date made live: 20 Jul 2009 11:32
URI: http://nora.nerc.ac.uk/id/eprint/5436

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