Positive relationship between plant palatability and litter decomposition in meadow plants
- 1 June 2008
- journal article
- Published by Springer Science and Business Media LLC in Community Ecology
- Vol. 9 (1), 17-27
- https://doi.org/10.1556/comec.9.2008.1.3
Abstract
Physical supporting or defense structures of plants, which decrease palatability, remain in plant tissue after a plant’s death and so decrease detritus decomposition rates. Consequently, palatability and detritus decomposition rate are expected to be positively correlated. Carbon is the main component of these restricting structures, whereas nitrogen is expected to increase plant attractiveness for herbivores. In this study, we tried to confirm the expected positive relationship between palatability and detritus decomposition rate and to find the species functional traits that are responsible for this concordant response. Some traits are shared by species as a consequence of their common phylogenetic history; consequently, we also studied the effect of phylogenetic correction on the expected relationships.We assessed the palatability of meadow plant species to a generalist slug Arion lusitanicus in an aquarium grazing experiment and detritus decomposition rate in a field litter-bag test. The two characteristics are positively correlated and the relationship is strengthened by phylogenetic correction. The relationship was strongest for the decomposition rates during the first three months of exposition, but weakened when the exposition period was from six months to a year. Palatability was negatively affected by plant carbon content, but no relationship was found between plant palatability and nitrogen content. Similarly, only the relationship of litter decomposition with litter carbon content was significant. The regression tree method was used to detect the influence of species traits on species palatability and detritus decomposition rate. In general, leaf dry matter content, litter carbon content and seed weight were chosen as the best predictors of plant palatability response. Results for the detritus decomposition rate response mainly reflect supporting or defensive structure contents. Litter carbon content, seed weight and plant height are the most apparent common predictors of these variable responses.In general, our study confirmed the positive relationship between plant palatability and detritus decomposition. Both plant tissue grazing and detritus decomposition are slowed down by plant tissue supportive structures, manifested as high dry matter content or high tissue carbon contentKeywords
This publication has 36 references indexed in Scilit:
- Effects of slug herbivory on the seedling establishment of two montane Asteraceae speciesFlora, 2005
- The effect of slug grazing on vegetation development and plant species diversity in an experimental grasslandFunctional Ecology, 2005
- Seedling resistance to herbivory as a predictor of relative abundance in a synthesised prairie communityOikos, 2003
- Differences in species richness and life‐history traits between grazed and abandoned grasslands in southern SwedenEcography, 2001
- Can grazing response of herbaceous plants be predicted from simple vegetative traits?Journal of Applied Ecology, 2001
- TAXON SAMPLING, CORRELATED EVOLUTION, AND INDEPENDENT CONTRASTSEvolution, 2000
- Comparison of seedling and adult palatability in annual and perennial plantsFunctional Ecology, 1999
- Herbivores, seed banks and seedling recruitment in mesic grasslandJournal of Ecology, 1999
- Variation in species richness: Towards a unification of hypothesesFolia Geobotanica et Phytotaxonomica, 1994
- Interactions Between Woody Plants and Browsing Mammals Mediated by Secondary MetabolitesAnnual Review of Ecology and Systematics, 1991