Diet and physiological responses of Spondyliosoma cantharus (Linnaeus, 1758) to the Caulerpa racemosa var. cylindracea invasion

Box, Antonio; Deudero, Salud; Sureda, Antoni; Blanco, Andreu; Alós, Josep; Terrados, Jorge; Grau, Antoni; Riera, F.

doi:10.1016/j.jembe.2009.08.010

Cited by 37 publications

(47 citation statements)

References 51 publications

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“…Although some fishes and invertebrates assimilate carbon derived from Caulerpa spp. (Box et al 2009;Casu et al 2009), this can be associated with physiological effects, suggesting that ingestion is incidental in some cases (Box et al 2009). Some species (e.g., sea slugs) have mechanisms to avoid effects of, and even exploit, algal toxins (Mollo et al 2008), but colonization by these species may represent a change in community assemblage following Caulerpa spp.…”

Section: Discussionmentioning

confidence: 99%

“…Fish species richness (York et al 2006), abundance, and biomass (Francour et al 1995;Levi and Francour 2004) are often reduced in C. taxifolia beds, reflecting a preference of fish for seagrass (Burfeind et al 2009), and C. taxifolia can alter assemblages of soft-sediment macroinvertebrates (Gribben and Wright 2006;McKinnon et al 2009). Although C. taxifolia produces toxic secondary metabolites (primarily caulerpenyne) to discourage herbivory (Amade and Lemee 1998), there is evidence that it provides nutrition for some biota (Box et al 2009;Casu et al 2009), suggesting that invasion alters trophic relationships. A major influence on the differences in trophic relationships and ecosystem functioning observed in habitats invaded by C. taxifolia is likely to be the altered detritus input to sediments.…”

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confidence: 99%

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Carbon self‐utilization may assist Caulerpa taxifolia invasion

Oakes¹,

Bautista²,

Maher³

et al. 2011

Limnology & Oceanography

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Additions of 13 C-labeled macroalgal detritus (Caulerpa taxifolia) and seagrass detritus (Zostera capricorni) to a vegetated intertidal mudflat in subtropical Australia provided insight into the mechanisms and ecosystem effects of C. taxifolia invasions in seagrass beds. Despite the high lability typical of macroalgae, carbon from seagrass detritus was removed from sediments and transferred to benthic compartments (microphytobenthos, bacteria, mud whelks, and live C. taxifolia and Z. capricorni) at a faster rate than carbon from macroalgal detritus. This preference was more pronounced for live Z. capricorni than live C. taxifolia. Whereas rates of dissolved inorganic carbon production and utilization were similar for seagrass and macroalgal detritus, higher fluxes of dissolved organic carbon (DOC) from macroalgal detritus early in the experiment reflected the lower utilization of this carbon pool. Although both seagrass and algae can use DOC as a source of carbon, caulerpenyne may comprise part of the DOC pool leached from C. taxifolia detritus during early degradation. This compound can have allelopathic effects on seagrass and may, therefore, be inaccessible to Z. capricorni. The availability of an additional carbon source for C. taxifolia, generated from its own detritus, represents a competitive advantage for this invasive macroalga over existing seagrass, particularly because seagrass productivity can be carbon-limited. A similar mechanism may exist for other species of invasive macroalga, particularly those that produce toxic secondary metabolites.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Carbon self‐utilization may assist Caulerpa taxifolia invasion

Oakes¹,

Bautista²,

Maher³

et al. 2011

Limnology & Oceanography

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“…Caulerpa racemosa is eaten by many invertebrates, such as the gastropods Ascobulla fragilis, Lobiger serra difalci and Bittium reticulatum, the echinoid Sphaerechinus granularis and the sparid fish Boops boops, Sarpa salpa, Pagellus acarne and Spondyliosoma cantharus (Klein & Verlaque 2008, Box et al 2009 and references therein). Caulerpales produce secondary metabolites that have been previously investigated for their ecological role both in the chemical defence against herbivores (McConnell et al 1982, Pe san do et al 1996, Lemée et al 1997) and as allelochemicals in in-terspecific competition among marine macrophytes (Raniello et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…More recently, it was revealed that the toxicity of Caulerpales in fish may be related to an increased production of reactive oxygen species (ROS), leading to oxidative damage. The activation of the antioxidant defence systems was evidenced in fish living in Caulerpa mats, namely the labrid Coris julis (Sureda et al 2006) and the sparid Spondyliosoma cantharus (Box et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Detrimental physiological effects of the invasive alga Caulerpa racemosa on the Mediterranean white seabream Diplodus sargus

Terlizzi¹,

Felline²,

Lionetto³

et al. 2011

Aquat. Biol.

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Observational data suggest that the white seabream Diplodus sargus, a sparid fish of economic and ecological relevance in the Mediterranean Sea, has included the invasive green alga Caulerpa racemosa in its diet. Here we adopted a chemoecological approach to study the trophic relationship between the fish and the exotic pest. We demonstrated that the red pigment caulerpin, the most abundant secondary metabolite of C. racemosa, enters food chains and accumulates in the fish tissues. General biological condition markers associated with fish health and reproductive development were measured and correlated with the caulerpin levels in the fish tissues. Significant correlations among caulerpin tissue load (determined by liquid chromatography-mass spectrometry analysis) and fish condition factor and hepatosomatic index were obtained, suggesting a possible detrimental effect of the dietary exposure to C. racemosa on D. sargus. Glutathione peroxidase and catalase activity were also significantly correlated with caulerpin concentrations in the liver, suggesting a possible interaction between algal metabolites and liver antioxidant mechanisms. Studies on the impact of invasive macroalgae on marine assemblages have been almost exclusively focused on the structural modification of benthic assemblages, through the alteration of the relative importance of some endemic species and the modification of habitat complexity. Here we propose a new mechanism by which invasive algae can impact marine systems, namely the entry of pest metabolites in food webs, with potential detrimental effects on the population dynamics of a single species, alteration of trophic webs and changes in the functioning of coastal ecosystems.

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“…For instance, consumption of C. racemosa by fish (i.e. Spondyliosoma cantharus, Boops boops, Sarpa salpa and Diplodus sargus) (Ruitton et al 2006, Box et al 2009, Terlezzi et al 2011, Tomas et al 2011) and sea urchins has been widely documented (Ruitton et al 2006, Bulleri et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Determinants of Caulerpa racemosa distribution in the north-western Mediterranean

Bulleri¹,

Alestra²,

Ceccherelli³

et al. 2011

Mar. Ecol. Prog. Ser.

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Predicting community susceptibility to invasion has become a priority for preserving biodiversity. We tested the hypothesis that the occurrence and abundance of the seaweed Caulerpa racemosa in the north-western (NW) Mediterranean would increase with increasing levels of human disturbance. Data from a survey encompassing areas subjected to different human influences (i.e. from urbanized to protected areas) were fitted by means of generalized linear mixed models, including descriptors of habitats and communities. The incidence of occurrence of C. racemosa was greater on urban than extra-urban or protected reefs, along the coast of Tuscany and NW Sardinia, respectively. Within the Marine Protected Area of Capraia Island (Tuscan Archipelago), the probability of detecting C. racemosa did not vary according to the degree of protection (partial versus total). Human influence was, however, a poor predictor of the seaweed cover. At the seascape level, C. racemosa was more widely spread within degraded (i.e. Posidonia oceanica dead matte or algal turfs) than in better preserved habitats (i.e. canopy-forming macroalgae or P. oceanica seagrass meadows). At a smaller spatial scale, the presence of the seaweed was positively correlated to the diversity of macroalgae and negatively to that of sessile invertebrates. These results suggest that C. racemosa can take advantage of habitat degradation. Thus, predicting invasion scenarios requires a thorough knowledge of ecosystem structure, at a hierarchy of levels of biological organization (from the landscape to the assemblage) and detailed information on the nature and intensity of sources of disturbance and spatial scales at which they operate.

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Diet and physiological responses of Spondyliosoma cantharus (Linnaeus, 1758) to the Caulerpa racemosa var. cylindracea invasion

Cited by 37 publications

References 51 publications

Carbon self‐utilization may assist Caulerpa taxifolia invasion

Carbon self‐utilization may assist Caulerpa taxifolia invasion

Detrimental physiological effects of the invasive alga Caulerpa racemosa on the Mediterranean white seabream Diplodus sargus

Determinants of Caulerpa racemosa distribution in the north-western Mediterranean

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