by Schneider, F. D., Brose, U., Rall, B. C., Guill, C.
Published: 05 October 2016
Species diversity is changing globally and locally, but the complexity of ecological communities hampers a general understanding of the consequences of animal species loss on ecosystem functioning. High animal diversity increases complementarity of herbivores but also increases feeding rates within the consumer guild. Depending on the balance of these counteracting mechanisms, species-rich animal communities may put plants under top-down control or may release them from grazing pressure. Using a dynamic food-web model with body-mass constraints, we simulate ecosystem functions of 20,000 communities of varying animal diversity. We show that diverse animal communities accumulate more biomass and are more exploitative on plants, despite their higher rates of intra-guild predation. However, they do not reduce plant biomass because the communities are composed of larger, and thus energetically more efficient, plant and animal species. This plasticity of community body-size structure reconciles the debate on the consequences of animal species loss for primary productivity.
Biodiversity; Ecological networks; Food webs; Theoretical ecology
- Brose, U., Blanchard, J. L., Eklöf, A., Galiana, N., Hartvig, M., R. Hirt, M., Kalinkat, G., Nordström, M. C., O'Gorman, E. J., Rall, B. C., Schneider, F. D., Thébault, E. and Jacob, U. (2016), Predicting the consequences of species loss using size-structured biodiversity approaches, Biological Reviews, :
- Kalinkat, G., Schneider, F.D., Digel, C., Guill, C., Rall, B. C., Brose, U. (2013), Body masses, functional responses and predator–prey stability, Ecology Letters, 16:1126–-1134
- Schneider, F.D., Scheu, S. & Brose, U. (2012), Body mass constraints on feeding rates determine the consequences of predator loss, Ecology Letters, 15:436–443
- Schneider, F.D., Brose, U. (2013), Beyond diversity: how nested predator effects control ecosystem functions, Journal of Animal Ecology, 82:64–71 (pdf)
- Schneider, F.D., Scheu, S. & Brose, U. (2014), Corrigendum to Schneider, Scheu & Brose (2012) DOI: 10.1111/j.1461-0248.2012.01750.x, Ecology Letters, 17:1339–1340 (pdf)
- Code release for Schneider et al. "Animal diversity and ecosystem functioning in dynamic food webs" , by Florian D. Schneider & Christian Guill