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Species richness enhances natural enemy biomass stability by decreasing their temporal turnover in agricultural landscapes
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While the temporal stability of communities of natural enemies in
agroecosystems is crucial to sustain pest control services over time,
little is known about what drives this stability. Using a 6-year dataset
composed of carabid collections, together with local and landscape-level
management descriptors from 57 arable fields in France, we examined the
abiotic and biotic drivers of mean carabid biomass and its inter-annual
variation in each field. We show that mean α-richness increases the mean
and stability of carabid biomass by decreasing the temporal turnover of
the community. Surprisingly, carabid asynchrony and evenness had no
influence on either stability or mean carabid biomass. At the landscape
level, diversifying crop phenology appears to be the most efficient way
to support carabid biomass stability. The stability of agrosystem
functioning requires further analysis because the mechanisms operating
in such habitats may be totally different from those operating in
natural or experimental grasslands.
Title: Species richness enhances natural enemy biomass stability by decreasing their temporal turnover in agricultural landscapes
Description:
While the temporal stability of communities of natural enemies in
agroecosystems is crucial to sustain pest control services over time,
little is known about what drives this stability.
Using a 6-year dataset
composed of carabid collections, together with local and landscape-level
management descriptors from 57 arable fields in France, we examined the
abiotic and biotic drivers of mean carabid biomass and its inter-annual
variation in each field.
We show that mean α-richness increases the mean
and stability of carabid biomass by decreasing the temporal turnover of
the community.
Surprisingly, carabid asynchrony and evenness had no
influence on either stability or mean carabid biomass.
At the landscape
level, diversifying crop phenology appears to be the most efficient way
to support carabid biomass stability.
The stability of agrosystem
functioning requires further analysis because the mechanisms operating
in such habitats may be totally different from those operating in
natural or experimental grasslands.
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