Title: Chapter Two – Connecting the Green and Brown Worlds: Allometric and Stoichiometric Predictability of Above- and Below-Ground Networks
Authors: MULDERS ChristianAHRESTANI FarshidBAHN MichaelBOHAN DavidBONKOWSKI MichaelGRIFFITHS BryanGUICHARNAUD RANNVEIG ANNAKATTGE JensKROGH Paul HenningLAVOREL SandraLEWIS OwenMANCINELLI GiogioNAEEM ShahidPENUELAS J.POORTER HendrikREICH PeterROSSI LoretoRUSCH GracielaSARDANS JordiWRIGHT Ian
Citation: ADVANCES IN ECOLOGICAL RESEARCH vol. 49 p. 69-175
Publisher: ELSEVIER ACADEMIC PRESS INC
Publication Year: 2013
JRC N°: JRC85118
ISSN: 0065-2504
URI: http://www.sciencedirect.com/science/article/pii/B9780124200029000020
http://publications.jrc.ec.europa.eu/repository/handle/JRC85118
DOI: 10.1016/B978-0-12-420002-9.00002-0
Type: Articles in periodicals and books
Abstract: We examine the potential of trait-based parameters for linking above-ground and below-ground ecological networks (hereafter ‘green’ and ‘brown’ worlds) to forecast community dynamics. We examine whether the brown and green worlds can be linked into a general model by combining classic allometric scaling and elemental stoichiometry. This synthesis considers carbon, nitrogen and phosphorus-related traits, numerical abundance of component species and size distribution across trophic levels. To realize this synthesis, we have re-analyzed plant, microbial and invertebrate databases that combine physico-chemical and biological information from terrestrial ecosystems spanning the globe. We found (1) indirect evidence to suggest that the traits from above-ground and below-ground systems can be integrated in the same model and (2) strong evidence for a much greater than expected stoichiometrical plasticity of plants and microbes that has implications for the entire food web. Nitrogen and phosphorus are primary basal resource drivers and more retranslocation of P than of N from leaves will lead to higher N:P in the litter. Under nutrient-rich conditions, higher foliar concentrations of N and P are mostly accompanied by lower N:P in the litter, suggesting that less P was retranslocated. This apparent stoichiometric dichotomy could result in shifts in threshold elemental ratios critical for ecosystem functioning and has important implications for a general food-web model, given that resource C:N:P ratios reflect environmental C:N:P ratios. We discuss insights that can be gained from integrating carbon and nitrogen isotope data into trait-based predictions, and address the origin of changes in Δ13C and Δ15N fractionation values as related to consumer–resource body-mass ratios.
JRC Directorate:Sustainable Resources

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.