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The Influence of Functional Diversity and Composition on Ecosystem Processes
Functional composition and functional diversity were the principal factors explaining plant productivity, plant percent nitrogen, plant total nitrogen, and light penetration in grassland plots.
Productivity and sustainability influenced by biodiversity in grassland ecosystems
THE functioning and sustainability of ecosystems may depend on their biological diversity1–8. Elton's9 hypothesis that more diverse ecosystems are more stable has received much…
Diversity and Productivity in a Long-Term Grassland Experiment
- D. Tilman, P. Reich, J. Knops, D. Wedin, T. Mielke, C. Lehman
- Environmental ScienceScience
- 26 October 2001
These results help resolve debate over biodiversity and ecosystem functioning, show effects at higher than expected diversity levels, and demonstrate, for these ecosystems, that even the best-chosen monocultures cannot achieve greater productivity or carbon stores than higher-diversity sites.
Biodiversity and ecosystem stability in a decade-long grassland experiment
It is found that greater numbers of plant species led to greater temporal stability of ecosystem annual aboveground plant production and the reliable, efficient and sustainable supply of some foods, fuels and ecosystem services can be enhanced by the use of biodiversity.
Biodiversity as a barrier to ecological invasion
It is shown that species diversity in small experimental grassland plots enhances invasion resistance by increasing crowding and species richness in localized plant neighbourhoods, and suggests that local biodiversity represents an important line of defence against the spread of invaders.
Nitrogen limitation constrains sustainability of ecosystem response to CO2
It is shown, after a six-year field study of perennial grassland species grown under ambient and elevated levels of CO2 and N, that low availability of N progressively suppresses the positive response of plant biomass to elevated CO2.
Plant diversity increases resistance to invasion in the absence of covarying extrinsic factors
A strong inverse association between resident diversity and invader performance is found as predicted by Elton's hypothesis, and covarying extrinsic factors may obscure the negative impact of diversity on invader success.
Herbivore effects on plant and nitrogen dynamics in oak Savanna
The hypothesis that herbivores indirectly decelerate N cycling by decreasing the abundance of plant species with nitrogen-rich tissues is supported, however, other factors, such as disturbance from fire, may mediate herbivore effects on long-term changes in N and C pools.
Plant species loss decreases arthropod diversity and shifts trophic structure.
- N. Haddad, G. Crutsinger, K. Gross, J. Haarstad, J. Knops, D. Tilman
- Environmental ScienceEcology letters
- 1 October 2009
The results demonstrate that, over the long term, the loss of plant species propagates through food webs, greatly decreasing arthropod species richness, shifting a predator-dominated trophic structure to being herbivore dominated, and likely impacting ecosystem functioning and services.