Document Detail


Drought alters interactions between root and foliar herbivores.
MedLine Citation:
PMID:  23292454     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Drought can alter plant quality and the strength of trophic interactions between herbivore groups, and is likely to increase in occurrence and severity under climate change. We hypothesized that changes in plant chemistry due to root herbivory and drought stress would affect the performance of a generalist and a specialist aphid species feeding on a Brassica plant. High drought stress increased the negative effect of root herbivory on the performance of both aphid species (30 % decrease in fecundity and 15 % reduction in intrinsic rate of increase). Aphid performance was greatest at moderate drought stress, though the two species differed in which treatment combination maximized performance. Nitrogen concentration was greatest in high and moderately drought-stressed plants without root herbivores and moderately drought-stressed plants under low root herbivore density, and correlated positively with aphid fecundity for both species. Glucosinolate concentrations increased 62 % under combined drought stress and root herbivory, and were positively correlated with extended aphid development time. Root herbivory did not influence relative water content and foliar biomass under normal water regimes but they decreased 24 and 63 %, respectively, under high drought stress. This study shows that drought can alter the strength of interactions between foliar and root herbivores, and that plant chemistry is key in mediating such interactions. The two aphid species responded in a broadly similar way to root herbivore and drought-stress treatments, which suggests that generalized predictions of the effects of abiotic factors on interactions between above- and below-ground species may be possible.
Authors:
Muhammad Tariq; John T Rossiter; Denis J Wright; Joanna T Staley
Related Documents :
18640704 - Field tests of surface seals and soil treatments to reduce fumigant emissions from shan...
12184874 - Aerosol number concentrations and size distributions at mountain-rural, urban-influence...
17547664 - No evidence for substantial aerobic methane emission by terrestrial plants: a 13c-label...
15092684 - Effects of airborne fluoride emissions near an aluminium works in wales: part 2--saxico...
20002314 - Distribution and abundance of the introduced ectomycorrhizal fungus amanita phalloides ...
21868044 - Impacts of maintenance dredged material disposal on macrobenthic structure and secondar...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-6
Journal Detail:
Title:  Oecologia     Volume:  -     ISSN:  1432-1939     ISO Abbreviation:  Oecologia     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0150372     Medline TA:  Oecologia     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire, SL5 7PY, UK, m.tariq06@imperial.ac.uk.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Food use is affected by the experience of nest predation: implications for indirect predator effects...
Next Document:  Herbivore species richness, composition and community structure mediate predator richness effects an...