NDLI: How do extreme drought and plant community composition affect host plant metabolites and herbivore performance?

Content Provider	Springer Nature Link
Author	Walter, Julia Hein, Roman Auge, Harald Beierkuhnlein, Carl Löffler, Sonja Reifenrath, Kerstin Schädler, Martin Weber, Michael Jentsch, Anke
Copyright Year	2011
Abstract	Water availability and plant community composition alter plant nutrient availability and the accumulation of plant defence compounds therefore having an impact on herbivore performance. Combined effects of drought stress and plant community composition on leaf chemicals and herbivore performance are largely unexplored. The objective of our study was, therefore, to find out the impact of extreme drought and of plant community composition on plant–herbivore interactions. Larvae of the generalist butterfly Spodoptera littoralis were reared on leaves of the grass Holcus lanatus which was grown in experimental communities, differing in species- and functional group richness. These communities were either subjected to extreme drought or remained under ambient climatic conditions. Drought decreased relative water content, soluble protein content, nitrogen and total phenol content and increased the content of carbohydrates in the grass. As a consequence, the larvae feeding on drought-exposed plants revealed a longer larval stage, increased pupal weight and higher adult eclosion rates. Plant community composition mainly caused changes to the defensive compounds of the grass, but also marginally affected protein and carbohydrate content. Larvae feeding on species-richest communities without legumes showed the highest mortality. Our findings imply that climate change that is projected to increase the frequency of severe droughts, as well as alter plant community compositions, is likely to affect arthropod–plant interactions through an alteration of leaf chemicals.
Starting Page	15
Ending Page	25
Page Count	11
File Format	PDF
ISSN	18728855
Journal	Arthropod-Plant Interactions
Volume Number	6
Issue Number	1
e-ISSN	18728847
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-10-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Climate change EVENT-experiments Drought Diversity Legume Behavioural Sciences Plant Sciences Entomology Invertebrates Plant Pathology Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Insect Science Agronomy and Crop Science

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