Get Aboveground-Belowground Linkages: Biotic Interactions, PDF

By Richard D. Bardgett

ISBN-10: 0199546878

ISBN-13: 9780199546879

ISBN-10: 0199546886

ISBN-13: 9780199546886

Aboveground-Belowground Linkages presents the main up to date and accomplished 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 international swap. It charts the old improvement of this box of ecology and evaluates what may be realized from the hot proliferation of experiences at the ecological and biogeochemical importance of aboveground-belowground linkages. The publication is established round 4 key themes: biotic interactions within the soil; plant group results; the function of aboveground shoppers; and the impact of species earnings and losses. A concluding bankruptcy attracts jointly this data and identifies a couple of cross-cutting issues, together with attention of aboveground-belowground feedbacks that happen at diverse spatial and temporal scales, the implications of those feedbacks for environment tactics, and the way aboveground-belowground interactions hyperlink to human-induced international switch.

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

Example text

A fungal:bacterial ratio of 1 means that fungal and bacterial rRNA gene copies are in equal abundance. The bar chart in the insert shows averages and standard errors of the fungal:bacterial ratios determined for each of the five biomes. From Fierer et al. (2009), with permission from Wiley-Blackwell. Consistent with this, Högberg et al. (2007) studied a range of boreal forests of contrasting nitrogen availability and nitrogen-loading, and found a strong negative correlation between gross nitrogen mineralization and the fungal-to-bacterial biomass ratio.

These predators can induce trophic cascades through changing the density of prey fauna, and thereby indirectly influence the abundance of bacteria and fungi (Fig. 6). Trophic cascades have long been recognized by soil ecologists to indirectly influence soil processes driven by soil microorganisms. For instance, Santos et al. (1981) showed that experimental reduction of predatory tydeid mites enhanced densities of bacterial feeding nematodes (their main prey source), which in turn reduced rates of microbial decomposition of plant litter.

2006) of a range of grassland sites in The Netherlands. These authors found that a higher fungal biomass in soil was associated with reduced nitrogen leaching and improved nitrogen balance in soil, suggesting a positive effect of fungi on nutrient retention. While other soil physicochemical factors might contribute to the patterns explained above, these studies collectively point to grassland soils with fungal-dominated microbial communities being more efficient in retaining nutrients than are their bacterial-dominated counterparts.

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Aboveground-Belowground Linkages: Biotic Interactions, Ecosystem Processes, and Global Change (Oxford Series in Ecology and Evolution) by Richard D. Bardgett


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