Comparing functional similarity between a native and an alien slug in temperate rain forests of British Columbia

By

Rodriguez-Cabal, Mariano
Gibbons, Taylor
Schulte, Patricia
Barrios-Garcia, M. Noelia
Crutsinger, Gregory

Type

Article

Date of Publication

2015

Original Publication

NeoBiota : advancing research on alien species and biological invasions

Volume

25

Pages

1-14

Subjects

European black slug , Gastropoda , generalist herbivores , invasive species , metabolic rate , Pacific banana slug

Contributed by

Pensoft Publishers

Language

English

Published by

Sophia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/neobiota.25.8316

 

Abstract

The impacts of invasive alien species are greatest when they become dominant members of a community, introduce novel traits, and displace native species. Invasions by alien mollusks represent a novel context by which to compare trait differences between generalist native and introduced herbivores in terrestrial ecosystems. Here, we determined the abundance, habitat, feeding preferences, as well as the metabolic rate of the native Pacific banana slug (Ariolimax columbianus) and the alien black slug (Arion rufus) in the coastal forests of British Columbia, Canada. Through a series of observational and experimental studies, we found that alien slugs are more abundant, differ in their habitat preferences, and consumed more fungi (mushrooms) than native banana slugs. Conversely, in an enclosures experiment we found that herbivory damage by native slugs was higher compared to enclosures with alien only and control enclosures. Finally, metabolic rates were similar for both slug species. These results suggest that alien black slugs possess a suite of traits that make them functionally different from native banana slugs.