Drought has negative consequences on aphid fitness and plant vigour: insights from a meta-analysis
1. Aphids are abundant in natural and managed vegetation, supporting a diverse community of organisms and causing damage to agricultural crops. Due to a changing climate, periods of drought are anticipated to increase, and the potential consequences of this for aphid-plant interactions are unclear....
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Sprache: | eng |
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Zusammenfassung: | 1. Aphids are abundant in natural and managed vegetation, supporting a
diverse community of organisms and causing damage to agricultural crops.
Due to a changing climate, periods of drought are anticipated to increase,
and the potential consequences of this for aphid-plant interactions are
unclear. 2. Using a meta-analysis and synthesis approach, we aimed to
advance understanding of how increased drought incidence will affect this
ecologically and economically important insect group, and to characterise
any potential underlying mechanisms. We used qualitative and quantitative
synthesis techniques to determine whether drought stress has a negative,
positive, or null effect on aphid fitness and examined these effects in
relation to 1) aphid biology, 2) geographical region, 3) host plant
biology. 3. Across all studies, aphid fitness is typically reduced under
drought. Subgroup analysis detected no difference in relation to aphid
biology, geographical region, or the aphid-plant combination, indicating
the negative effect of drought on aphids is potentially universal.
Furthermore, drought stress had a negative impact on plant vigour and
increased plant concentrations of defensive chemicals, suggesting the
observed response of aphids is associated with reduced plant vigour and
increased chemical defence in drought-stressed plants. 4. We propose a
conceptual model to predict drought effects on aphid fitness in relation
to plant vigour and defence to stimulate further research. |
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DOI: | 10.5061/dryad.jdfn2z3bn |