Understanding the invasion success of Sargassum muticum: herbivore preferences for native and invasive Sargassum spp

Schwartz, Nicole; Rohde, Sven; Shimabukuro, Hiromori; Schupp, Peter J.

doi:10.1007/s00227-016-2953-4

Cited by 16 publications

(20 citation statements)

References 81 publications

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“…muticum (inv.) compared to native Japanese Sargassum species is consistent with our recent study comparing the chemical herbivore deterrence of the same species [ 50 ].…”

Section: Discussionsupporting

confidence: 91%

The role of chemical antifouling defence in the invasion success of Sargassum muticum: A comparison of native and invasive brown algae

et al. 2017

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Competition and fouling defence are important traits that may facilitate invasions by non-indigenous species. The ‘novel weapons hypothesis’ (NWH) predicts that the invasive success of exotic species is closely linked to the possession of chemical defence compounds that the recipient community in the new range is not adapted to. In order to assess whether chemical defence traits contribute to invasion success, anti-bacterial, anti-quorum sensing, anti-diatom, anti-larval and anti-algal properties were investigated for the following algae: a) the invasive brown alga Sargassum muticum from both, its native (Japan) and invasive (Germany) range, b) the two non- or weak invasive species Sargassum fusiforme and Sargassum horneri from Japan, and c) Fucus vesiculosus, a native brown alga from Germany. Crude and surface extracts and lipid fractions of active extracts were tested against common fouling organisms and zygotes of a dominant competing brown alga. Extracts of the native brown alga F. vesiculosus inhibited more bacterial strains (75%) than any of the Sargassum spp. (17 to 29%). However, Sargassum spp. from Japan exhibited the strongest settlement inhibition against the diatom Cylindrotheca closterium, larvae of the bryozoan Bugula neritina and zygotes of the brown alga F. vesiculosus. Overall, extracts of S. muticum from the invasive range were less active compared to those of the native range suggesting an adaptation to lower fouling pressure and competition in the new range resulting in a shift of resource allocation from costly chemical defence to reproduction and growth. Non-invasive Sargassum spp. from Japan was equally defended against fouling and competitors like S. muticum from Japan indicating a necessity to include these species in European monitoring programs. The variable antifouling activity of surface and crude extracts highlights the importance to use both for an initial screening for antifouling activity.

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“…muticum (inv.) compared to native Japanese Sargassum species is consistent with our recent study comparing the chemical herbivore deterrence of the same species [ 50 ].…”

Section: Discussionsupporting

confidence: 91%

The role of chemical antifouling defence in the invasion success of Sargassum muticum: A comparison of native and invasive brown algae

et al. 2017

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“…; Schwartz et al . ). These findings are consistent with the spatial patterns of S. horneri abundance observed here.…”

Section: Discussionmentioning

confidence: 97%

“…However, at intermediate grazer densities, preferential herbivory on native algae may be substantial enough to facilitate S. horneri. Urchins have been shown to graze a non-native alga only in the absence of preferred native kelp (Sumi & Scheibling 2005), and grazer preference studies have also shown that native macroalgae are preferred over Sargassum species in their invasive ranges, which could have major implications for the trajectory of the macroalgal community (Monteiro et al 2009;Schwartz et al 2016). These findings are consistent with the spatial patterns of S. horneri abundance observed here.…”

Section: Discussionmentioning

confidence: 99%

Marine management affects the invasion success of a non‐native species in a temperate reef system in California, USA

2017

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Despite promises that 'healthy' marine systems show increased resilience, the effects of ecosystem management strategies on invasion success in marine systems is still unclear. We show that resistance to the invasive alga, Sargassum horneri, in a temperate reef system occurs through alternate mechanisms in different ecosystem states. In an old marine protected area (MPA), invasion of S. horneri was suppressed, likely due to competitive pressure from native algae, resulting from protection of urchin predators. In a nearby fished urchin barren, invasion of S. horneri was also suppressed, due to herbivory by urchins whose predators are fished. Within newer MPAs with intermediate levels of interacting species, S. horneri was abundant. Here, neither competition from native algae nor herbivory was sufficient to prevent invasion. We confirm that invasion in marine systems is complex and show that multiple mechanisms in single systems must be considered when investigating biotic resistance hypotheses.

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“…These bioactive substances can perform various tasks for their producers and associated organisms; for instance, SMs work as a chemical defense against predators (Pohnert 2004;Kubicek et al 2011;Rasher et al 2013;Rohde et al 2015;Helber et al 2017), function as attractants toward consumers (Sakata 1989), have antimicrobial effects against pathogenic microbes (Goecke et al 2010;Puglisi et al 2014;Helber et al 2018), guide the opposing sex by letting individuals find and evaluate potential mating partners through chemical cues (Lonsdale et al 1998;Li et al 2002), or act as settlement cues for invertebrate larvae to initiate the transformation into a sessile, juvenile form (Morse et al 1988;Heyward and Negri 1999;Negri et al 2001;Kitamura et al 2009;Tebben et al 2011Tebben et al , 2015Sneed et al 2014). For example, different classes of macroalgae defend themselves chemically against herbivores and produce SMs with antimicrobial and antifouling activity (Schupp and Paul 1994;Paul et al 2014;Schwartz et al 2016). Specifically, brown algae of the family Dictyotaceae produce several classes of diterpenes that defend their producers against herbivores but have also shown activity against other competitors.…”

Section: Marine Chemical Ecology: Predator-prey Interactions and Compmentioning

confidence: 99%

Secondary Metabolites of Marine Microbes: From Natural Products Chemistry to Chemical Ecology

Petersen

Kellermann

Schupp

2019

YOUMARES 9 - The Oceans: Our Research, Our Future

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Marine natural products (MNPs) exhibit a wide range of pharmaceutically relevant bioactivities, including antibiotic, antiviral, anticancer, or anti-inflammatory properties. Besides marine macroorganisms such as sponges, algae, or corals, specifically marine bacteria and fungi have shown to produce novel secondary metabolites (SMs) with unique and diverse chemical structures that may hold the key for the development of novel drugs or drug leads. Apart from highlighting their potential benefit to humankind, this review is focusing on the manifold functions of SMs in the marine ecosystem. For example, potent MNPs have the ability to exile predators and competing organisms, act as attractants for mating purposes, or serve as dye for the expulsion or attraction of other organisms. A large compilation of literature on the role of MNPs in marine ecology is available, and several reviews evaluated the function of MNPs for the aforementioned topics. Therefore, we focused the second part of this review on the importance of bioactive compounds from crustose coralline algae (CCA) and their role during coral settlement, a topic that has received less attention. It has been shown that certain SMs derived from CCA and their associated bacteria are able to induce attachment and/or metamorphosis of many benthic invertebrate larvae, including globally threatened reef-building scleractinian corals. This review provides an overview on bioactivities of MNPs from marine microbes and their potential use in medicine as well as on the latest findings of the chemical ecology and settlement process of scleractinian corals and other invertebrate larvae.

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Understanding the invasion success of Sargassum muticum: herbivore preferences for native and invasive Sargassum spp

Cited by 16 publications

References 81 publications

The role of chemical antifouling defence in the invasion success of Sargassum muticum: A comparison of native and invasive brown algae

The role of chemical antifouling defence in the invasion success of Sargassum muticum: A comparison of native and invasive brown algae

Marine management affects the invasion success of a non‐native species in a temperate reef system in California, USA

Secondary Metabolites of Marine Microbes: From Natural Products Chemistry to Chemical Ecology

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