Download Aboveground-Belowground Linkages: Biotic Interactions, by Richard D. Bardgett PDF

By Richard D. Bardgett

Aboveground-Belowground Linkages presents the main updated and entire synthesis of modern advances in our figuring out of the jobs that interactions among aboveground and belowground groups play in regulating the constitution and serve as of terrestrial ecosystems, and their responses to worldwide switch. It charts the old improvement of this box of ecology and evaluates what could be realized from the new proliferation of stories at the ecological and biogeochemical importance of aboveground-belowground linkages. The e-book is dependent round 4 key issues: biotic interactions within the soil; plant neighborhood results; the function of aboveground shoppers; and the impression of species profits and losses. A concluding bankruptcy attracts jointly this knowledge and identifies a few cross-cutting topics, together with attention of aboveground-belowground feedbacks that take place at varied spatial and temporal scales, the results of those feedbacks for environment tactics, and the way aboveground-belowground interactions hyperlink to human-induced international switch.

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Extra info for Aboveground-Belowground Linkages: Biotic Interactions, Ecosystem Processes, and Global Change (Oxford Series in Ecology and Evolution)

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1998b) found that plant diversity and productivity were positively related to arbuscular mycorrhizal fungal diversity in experimental grassland, a response that was attributed to more efficient exploitation and partitioning of soil phosphorus reserves in high arbuscular mycorrhizal diversity treatments. In support, Maherali and Klironomos (2007) discovered that there is much functional complementarity between coexisting arbuscular mycorrhizal fungal taxa, which acts to enhance plant production.

2008) found that the fungal-rich soil was better able to retain nutrients under drying/wetting disturbance than was the soil with a greater bacterial contribution. Moreover, the increased nutrient loss from improved soils was associated with a marked decline (45% relative to control) in microbial biomass nitrogen, suggesting that bacterial-dominated communities are more sensitive to disturbance than are their fungal-rich counterparts. Other evidence that shifts in microbial composition relate to changes in nutrient cycling at the field scale comes from the study by de Vries et al.

For instance, microcosm studies show that root-feeding nematodes and foliar herbivory can enhance root exudation, which in turn stimulates rhizosphere microbial growth and activity, and alters microbial community composition (Denton et al. 1999; Guitian and Bardgett 2000; Ayres et al. 2007), with likely consequences for nutrient availability. However, De Deyn et al. (2007) found no effects of aboveground and belowground herbivory 40 • 2 Biotic interactions as ecosystem drivers by wireworms on decomposer nematodes, although the wireworms did facilitate root-feeding nematode, which was thought to be driven by shifts in plant species composition.

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