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Low feeding preference of native herbivores for the successful non-native seaweed Heterosiphonia japonica
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Low feeding preference of native herbivores for the successful non-native seaweed Heterosiphonia japonica
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Journal Article
Low feeding preference of native herbivores for the successful non-native seaweed Heterosiphonia japonica
2015
Overview
Non-native seaweeds constitute a conspicuous component of many benthic coastal communities. Seaweed invaders are known to significantly affect invaded communities, but relatively little is known about the mechanisms underlying their success. In this study, we explored the feeding preferences of three generalist herbivores for the successful non-native red alga
Heterosiphonia japonica
and native seaweed competitors. The experiments were conducted on the Swedish Skagerrak coast (58°52′N, 11°08′E) from July to August. Additionally, chemical and physical traits of the seaweeds were assessed to mechanistically explain herbivore preferences. The results showed that
H. japonica
was of low preference to native herbivores and that this was most likely explained by chemical properties of the invader. We were, however, not able to determine whether the low preference was caused by deterrent metabolites or low nutritional quality. We conclude that herbivore avoidance may be important for the survival and success of
H. japonica
in the introduced range and that efficient means of escaping herbivory may be a common feature of invaders in seaweed communities.
Publisher
Springer Berlin Heidelberg,Springer,Springer Nature B.V
