Specific bottom-up effects of arbuscular mycorrhizal fungi across a plant-herbivore-parasitoid system

被引:80
作者
Hempel, Stefan [1 ]
Stein, Claudia [2 ]
Unsicker, Sybille B. [3 ]
Renker, Carsten [1 ]
Auge, Harald [2 ]
Weisser, Wolfgang W. [4 ]
Buscot, Francois [1 ]
机构
[1] UFZ Helmholtz Ctr Environm Res, Dept Soil Ecol, D-06120 Halle, Germany
[2] UFZ Helmholtz Ctr Environm Res, Dept Community Ecol, D-06120 Halle, Germany
[3] Max Planck Inst Chem Ecol, Dept Biochem, D-07745 Jena, Germany
[4] Univ Jena, Inst Ecol, D-07743 Jena, Germany
关键词
Aphidius rhopalosiphi; Insect herbivory; Multitrophic interactions; Parasitoid performance; Rhopalosiphum padi; LIFE-HISTORY TRAITS; COMMUNITY COMPOSITION; TROPHIC INTERACTIONS; SOIL; ROOT; ECOSYSTEM; COLONIZATION; RESPONSES; FERTILIZATION; BIODIVERSITY;
D O I
10.1007/s00442-009-1294-0
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
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.
引用
收藏
页码:267 / 277
页数:11
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