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Tag Archives: EGU 2016

Must vineyard managers choose between bees or worms?

By Liz Kalaugher

Given the option, would you help bees or worms? That’s the choice indicated by initial results presented at the European Geosciences Union General Assembly in Vienna this week by Sophie Kratschmer of the University of Natural Research and Life Sciences in Vienna.

As part of the VineDivers project, Kratschmer found that, contrary to expectations, solitary bees in vineyards in eastern Austria thrived when there was less management of the vegetation between rows of vines. This higher diversity was a surprise as disturbed ground tends to contain more flowers, a food source for bees. Since solitary bees nest underground, however, they may not appreciate tillage. The team did find a link between flower coverage and the number of wild bee species.

Earthworms, in contrast, were more diverse when there was ploughing of the earth between the vines, probably, according to Kratschmer, because it boosts the carbon content and makes the soil less compact. Plant diversity and biomass weren’t affected by the management intensity.

Both bees and worms are useful for viniculture, with bees providing pollination while earthworms help form soil and cycle nutrients.

Fortunately, when it comes to selecting management regimes for vineyards, the findings may not boil down to a difficult choice between bees and worms. Next Kratschmer will investigate a “medium” management intensity, intermediate between the low and high regimes in this study, which may work for both types of animal.

The wider VineDivers project will pool results from France, Romania and Spain and also use GIS analysis to find out the role of landscape diversity.

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