Specific bottom–up effects of arbuscular mycorrhizal fungi across a plant–herbivore–parasitoid system
Open Access
- 14 February 2009
- journal article
- research article
- Published by Springer Science and Business Media LLC in Oecologia
- Vol. 160 (2), 267-277
- https://doi.org/10.1007/s00442-009-1294-0
Abstract
The majority of plants are involved in symbioses with arbuscular mycorrhizal fungi (AMF), and these associations are known to have a strong influence on the performance of both plants and insect herbivores. Little is known about the impact of AMF on complex trophic chains, although such effects are conceivable. In a greenhouse study we examined the effects of two AMF species, Glomus intraradices and G. mosseae on trophic interactions between the grass Phleum pratense, the aphid Rhopalosiphum padi, and the parasitic wasp Aphidius rhopalosiphi. Inoculation with AMF in our study system generally enhanced plant biomass (+5.2%) and decreased aphid population growth (−47%), but there were no fungal species-specific effects. When plants were infested with G. intraradices, the rate of parasitism in aphids increased by 140% relative to the G. mosseae and control treatment. When plants were associated with AMF, the developmental time of the parasitoids decreased by 4.3% and weight at eclosion increased by 23.8%. There were no clear effects of AMF on the concentration of nitrogen and phosphorus in plant foliage. Our study demonstrates that the effects of AMF go beyond a simple amelioration of the plants’ nutritional status and involve rather more complex species-specific cascading effects of AMF in the food chain that have a strong impact not only on the performance of plants but also on higher trophic levels, such as herbivores and parasitoids.Keywords
This publication has 48 references indexed in Scilit:
- Three‐Way Interactions among Mutualistic Mycorrhizal Fungi, Plants, and Plant Enemies: Hypotheses and SynthesisThe American Naturalist, 2006
- Linking aboveground and belowground interactions via induced plant defensesTrends in Ecology & Evolution, 2005
- Biodiversity and ecosystem function in soilFunctional Ecology, 2005
- Soil community composition drives aboveground plant–herbivore–parasitoid interactionsEcology Letters, 2005
- Multitrophic links between arbuscular mycorrhizal fungi and insect parasitoidsEcology Letters, 2003
- Mycorrhizae-Herbivore Interactions: Population and Community ConsequencesEcological Studies, 2002
- Species‐specific responses of a root‐ and shoot‐feeding insect to arbuscular mycorrhizal colonization of its host plantNew Phytologist, 2001
- Arbuscular mycorrhizal fungi, Collembola and plant growthTrends in Ecology & Evolution, 2000
- Positive effects of an arbuscular mycorrhizal fungus on aphid life history traitsOecologia, 1999
- Interactions between arbuscular mycorrhizal fungi and foliar‐feeding insects inPlantago lanceolataL.New Phytologist, 1994