Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Impacts of The Invasive Seaweed Asparagopsis armata Exudate on Rockpool Invertebrates

Version 1 : Received: 8 August 2020 / Approved: 10 August 2020 / Online: 10 August 2020 (05:02:51 CEST)

How to cite: Silva, C.O.; Novais, S.C.; Soares, A.M.; Barata, C.; Lemos, M.F. Impacts of The Invasive Seaweed Asparagopsis armata Exudate on Rockpool Invertebrates. Preprints 2020, 2020080236 (doi: 10.20944/preprints202008.0236.v1). Silva, C.O.; Novais, S.C.; Soares, A.M.; Barata, C.; Lemos, M.F. Impacts of The Invasive Seaweed Asparagopsis armata Exudate on Rockpool Invertebrates. Preprints 2020, 2020080236 (doi: 10.20944/preprints202008.0236.v1).

Abstract

The marine red algae Asparagopsis armata is an invasive species which competitive advantage arises from the production and release of large amounts of toxic compounds to the surrounding invaded area, reducing the abundance of native species. The main objective of this study was to evaluate the effects of this invasive seaweed on marine invertebrates by exposing the common prawn Palaemon elegans and the marine snail Gibbula umbilicalis to the exudate of this macroalgae. The seaweed was collected and placed in tanks, for 12 hours, in the dark in a 1:10 ratio. Afterwards the media containing its secondary metabolites was collected for further testing. Lethal and sublethal effects of A. armata were investigated. Biochemical biomarkers responses associated with energy metabolism (lactate dehydrogenase, LDH; electron transport system activity, ETS; content in lipids, proteins and carbohydrates) were analysed. The biomarker responses showed invertebrates’ physiological status impairment after exposure to low concentrations of this algae exudate. Highest concentrations of exudate significantly increased lipid content in both organisms. In the shrimp, protein content, ETS, and LDH were also significantly increased. On the contrary, these parameters were significantly decreased in G. umbilicalis. A behavioural impairment was also observed in G. umbilicalis exposed to A. armata exudate, with reduction in feeding consumption. These results represent an important step in the research of natural toxic exudates released to the environment and prospective effects of this seaweed in invaded communities under increasing global change scenarios.

Subject Areas

Behaviour; Ecotoxicology; Invasive Species; Gibbula Umbilicalis; Palaemon Elegans; Tidal Pools

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.