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Biodiversity effects on soil processes explained by interspecific functional dissimilarity.

D A Heemsbergen¹, M P Berg, M Loreau

¹Vrije Universiteit, Institute of Ecological Science, Department of Animal Ecology, de Boelelaan 1085, 1081 HV Amsterdam, Netherlands.

Science (New York, N.Y.)

|November 6, 2004

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Biodiversity loss impacts ecosystems, but how is unclear. Experiments show that the functional differences between detritivorous species, not just their numbers, drive ecosystem processes like decomposition and respiration.

Area of Science:

Ecology
Soil Science
Biodiversity Research

Background:

Biodiversity loss poses risks to ecosystem functioning.
The precise mechanisms linking biodiversity to ecosystem processes remain under-investigated.
Empirical evidence for biodiversity's role in ecosystem functioning is crucial.

Purpose of the Study:

To experimentally test the role of functional dissimilarity versus species richness in driving ecosystem functioning.
To confirm theoretical predictions regarding biodiversity effects on ecosystem processes.
To elucidate the mechanisms by which detritivore communities influence soil ecosystem functions.

Main Methods:

Utilized controlled soil microcosms for experimental manipulation.
Investigated the effects of detritivorous species composition on key soil ecosystem processes.

Related Experiment Videos

Quantified leaf litter mass loss and soil respiration rates.

Main Results:

Functional dissimilarity among detritivorous species significantly influenced leaf litter mass loss.
Functional dissimilarity, rather than species number, was the primary driver of soil respiration.
Experimental results align with theoretical predictions on biodiversity and ecosystem functioning.

Conclusions:

The functional differences among species are key drivers of ecosystem functioning.
Biodiversity effects on ecosystem processes are predictable based on species' functional traits.
This study provides empirical support for the functional basis of biodiversity-ecosystem functioning relationships.