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Grazing slugs hinder grassland restoration
Date:7/13/2013

Selective grazing by slugs may prevent key grassland species from taking hold and hampers efforts to restore our hay meadows, new research has shown.

Work by scientists at Newcastle University, UK, has looked at the impact slugs have on grassland biodiversity and how this might inform future restoration work.

Although renowned for their ability to chew through a gardener's prize petunias or strawberry patch, still relatively little is known about the effect these munching molluscs have on large scale grassland conservation projects.

But for the first time this latest research shows that some of the most ecologically important species such as the red clover are particularly tasty to slugs, which may reduce the number of seedlings becoming established and overall plant diversity.

Publishing their results next month in the academic journal Annals of Botany, the research team has shown the impact of Deroceras reticulatum otherwise known as the field slug may need to be managed in order to help seedlings establish and contribute towards successful restoration.

"Herbivory is a fundamental driver of plant diversity," explains Dr Sarah Barlow, who carried out the work while at Newcastle University and is now based at the Royal Botanic Gardens, Kew.

"We know a lot about the benefits and drawbacks - of grazing by larger vertebrates such as cows and sheep but we haven't studied in detail the impact slugs might have, particularly on very young plants in meadows that we are trying to restore.

"What these initial studies have shown is that Deroceras reticulatum may actually be very damaging in this situation due to it finding some key species particularly tasty.

"One of these, red clover, is particularly important due to the symbiotic bacteria which live in its roots and help to fix Nitrogen into the soil, benefitting not just the clover but all the meadow seedlings."

Only around 5% of the slug population is actu
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Contact: Dr. Gordon Port
gordon.port@ncl.ac.uk
44-019-122-26894
Newcastle University
Source:Eurekalert

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