Assessment of control methods for the invasive seaweed Sargassum horneri in California, USA.
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Marks, Lindsay M.
Reed, Daniel C.
Obaza, Adam K.
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Determining the feasibility of controlling marine invasive algae through removal is critical to developing a strategy to manage their spread and impact. To inform control strategies, we investigated the efficacy and efficiency of removing an invasive seaweed, Sargassum horneri, from rocky reefs in southern California, USA. We tested the efficacy of removal as a means of reducing colonization and survivorship by clearing S. horneri from 60 m2 circular plots. We also examined whether S. horneri is able to regenerate from remnant holdfasts with severed stipes to determine whether efforts to control S. horneri require the complete removal of entire individuals. The experimental removal of S. horneri in early winter, just prior to the onset of reproduction, reduced recruitment in the next generation by an average of 54% and reduced survivorship to adulthood by an average of 25%. However, adult densities one year after clearing averaged 83% higher in removal plots and 115% higher in c.....
JournalManagement of Biological Invasions
Sustainable Development Goals (SDG)14.2
Essential Ocean Variables (EOV)Macroalgal canopy cover and composition
Maturity LevelTRL 8 Actual system completed and "mission qualified" through test and demonstration in an operational environment (ground or space)
Best Practice TypeManual (incl. handbook, guide, cookbook etc)
CitationMarks, L.M.; Reed, D.C. and Obaza. A.K. (2017) Assessment of control methods for the invasive seaweed Sargassum horneri in California, USA. Management of Biological Invasions, 8, pp.205–213. DOI: https://doi.org/10.3391/mbi.2017.8.2.08
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