Functional redundancy in ecology and conservation

@article{Rosenfeld2002FunctionalRI,
  title={Functional redundancy in ecology and conservation},
  author={Jordan S. Rosenfeld},
  journal={Oikos},
  year={2002},
  volume={98},
  pages={156-162}
}
Multiple studies have shown that biodiversity loss can impair ecosystem processes, providing a sound basis for the general application of a precautionary approach to managing biodiversity. However, mechanistic details of species loss effects and the generality of impacts across ecosystem types are poorly understood. The functional niche is a useful conceptual tool for understanding redundancy, where the functional niche is defined as the area occupied by a species in an n-dimensional functional… 

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References

SHOWING 1-10 OF 36 REFERENCES

Conserving Biological Diversity through Ecosystem Resilience

Ecological redundancy is good because it enhances ecosystem resilience, but functionally important groups that have only one or very few species deserve priority conservation attention because their functions could be quickly lost with species extinctions.

Biodiversity and Ecological Redundancy

This paper addresses the problem of which biota to choose to best satisfy the conservation goals for a particular region in the face of inadequate resources, and asserts that focusing on species is not the best approach.

Biodiversity enhances ecosystem reliability

It is found that as the number of species per functional group increased, replicate communities were more consistent in biomass and density measures, suggesting that redundancy (in the sense of having multiple species perfunctional group) is a valuable commodity, and that the provision of adequate redundancy may be one reason for preserving biodiversity.

Ecosystem functioning and intrinsic value of biodiversity.

It is emphasized that attempts to conserve biodiversity do not need special justification in possible relationships between diversity and ecosystem services and that any decrease in species diversity will be meaningful and any redundancy will be impossible by definition.

Functional redundancy in heterogeneous environments: implications for conservation

It has been argued that one of the best ways to conserve biological diversity is to maintain the integrity of functional processes within communities, and this can be accomplished by assessing how

Expert Estimates about Effects of Biodiversity on Ecosystem Processes and Services

The survey suggests caution in reducing ecosystem-level biodiversity, but it also underscores the opportunities for land management that may arise from the recognition of biodiversity effects in ecosystems.

Plant diversity and ecosystem productivity: theoretical considerations.

Three simple models of interspecific competitive interactions in communities containing various numbers of randomly chosen species predict that, on average, productivity increases asymptotically with the original biodiversity of a community and show that both species identity and biodiversity simultaneously influence ecosystem functioning.

Logical Fallacies in the Assessment of Functional Redundancy

The purpose here is not to argue against the use of ecosystem function as an index of ecosystem health and services, but rather to identify the limitations of the concept and the potential fallacies arising from its misinterpretation.

ECOSYSTEM EFFECTS OF BIODIVERSITY: A CLASSIFICATION OF HYPOTHESES AND EXPLORATION OF EMPIRICAL RESULTS

The increasing evidence for effects of biodiversity on ecosystem properties and processes indicates that effects may vary strongly over the range of studied systems. In order to explore patterns and

Numerical and per capita responses to species loss: mechanisms maintaining ecosystem function in a community of stream insect detritivores

There was no simple relationship between biodiversity and ecosystem functioning, however, when numerical or per capita compensation does occur, stability of function should rise with diversity in such “interactive” assemblages.