Marine chemical ecology in benthic environments

Puglisi, Melany P.; Sneed, Jennifer M.; Sharp, Koty; Ritson‐Williams, Raphael; Paul, Valerie J.

doi:10.1039/c4np00017j

Cited by 65 publications

(52 citation statements)

References 226 publications

(244 reference statements)

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“…which, perhaps not coincidentally, are invasive species along the coast of Rio de Janeiro 45 . Bromoindoles have been shown to be toxic to various organisms, suggesting a role in protecting the host (such as corals, sponges, algae and other invertebrates) from predation and/or disease 5,10,43 . The 2 mixed halogenated MeO-BDEs (MeO-BCDE Br 3 Cl 1 and 2) identified herein were previously found in NW Atlantic dolphin 16 and in NE Pacific bottlenose dolphins 17 .…”

Section: Resultsmentioning

confidence: 99%

Nontargeted Screening of Halogenated Organic Compounds in Bottlenose Dolphins (Tursiops truncatus) from Rio de Janeiro, Brazil

Alonso

Maruya

Dodder

et al. 2017

Environ. Sci. Technol.

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To catalog the diversity and abundance of halogenated organic compounds (HOCs) accumulating in high trophic marine species from the southwestern Atlantic Ocean, tissue from bottlenose dolphins (Tursiops truncatus) stranded or incidentally captured along the coast of Rio de Janeiro, Brazil, were analyzed by a non-targeted approach based on GC×GC/TOF-MS. A total of 158 individual HOCs from 32 different structural classes were detected in the blubber of 4 adult male T. truncatus. Nearly 90 percent of the detected compounds are not routinely monitored in the environment. DDT-related and mirex/dechlorane-related compounds were the most abundant classes of anthropogenic origin. Methoxy-brominated diphenyl ethers and chlorinated methyl- and dimethyl bipyrroles (MBPs and DMBPs) were the most abundant natural products. Reported for the first time in southwestern Atlantic cetaceans and in contrast to North American marine mammals, chlorinated MBPs and DMBPs were more diverse and abundant than their brominated and/or mixed halogenated counterparts. HOC profiles in coastal T. tursiops from Brazil and California revealed a distinct difference, with a higher abundance of mirex/dechloranes and chlorinated bipyrroles in the Brazilian dolphins. Thirty-six percent of the detected HOCs had an unknown structure. These results suggest broad geographical differences in the patterns of bioaccumulative chemicals found in the marine environment, and indicate the need to develop more complete catalogs of HOCs from various marine environments.

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Section: Resultsmentioning

confidence: 99%

Nontargeted Screening of Halogenated Organic Compounds in Bottlenose Dolphins (Tursiops truncatus) from Rio de Janeiro, Brazil

Alonso

Maruya

Dodder

et al. 2017

Environ. Sci. Technol.

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“…It is hypothesized that trophic specialists in marine ecosystems should be selected to use prey-specific secondary metabolites as foraging cues, whereas generalists should track to mixtures of primary metabolites indicative of a variety of prey (9). This hypothesis was untested, because foraging cues have been identified for only a few marine consumers, none of which are specialist herbivores (10). We identified 4-HBA as the chemical cue that Elysia tracks to locate vegetative H. incrassata and HTA as the primary cue that it uses to locate the few reproductive H. incrassata that occur during each spawning event (23).…”

Section: Resultsmentioning

confidence: 99%

“…These volatile compounds involved in insect foraging and plant defense are well described; generally, they are nonpolar secondary compounds (or blends of compounds) that are plantspecific. In contrast, few herbivores in marine ecosystems are trophic specialists (8), and whether they use chemical cues to locate their prey remains poorly understood (9,10). The identities of such foraging cues are unknown but are predicted to be polar compounds that diffuse readily through water (9,10).…”

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confidence: 99%

Marine and terrestrial herbivores display convergent chemical ecology despite 400 million years of independent evolution

Rasher

Stout

Engel

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Chemical cues regulate key ecological interactions in marine and terrestrial ecosystems. They are particularly important in terrestrial plant-herbivore interactions, where they mediate both herbivore foraging and plant defense. Although well described for terrestrial interactions, the identity and ecological importance of herbivore foraging cues in marine ecosystems remain unknown. Here we show that the specialist gastropod Elysia tuca hunts its seaweed prey, Halimeda incrassata, by tracking 4-hydroxybenzoic acid to find vegetative prey and the defensive metabolite halimedatetraacetate to find reproductive prey. Foraging cues were predicted to be polar compounds but instead were nonpolar secondary metabolites similar to those used by specialist terrestrial insects. Tracking halimedatetraacetate enables Elysia to increase in abundance by 12-to 18-fold on reproductive Halimeda, despite reproduction in Halimeda being rare and lasting for only ∼36 h. Elysia swarm to reproductive Halimeda where they consume the alga's gametes, which are resource rich but are chemically defended from most consumers. Elysia sequester functional chloroplasts and halimedatetraacetate from Halimeda to become photosynthetic and chemically defended. Feeding by Elysia suppresses the growth of vegetative Halimeda by ∼50%. Halimeda responds by dropping branches occupied by Elysia, apparently to prevent fungal infection associated with Elysia feeding. Elysia is remarkably similar to some terrestrial insects, not only in its hunting strategy, but also its feeding method, defense tactics, and effects on prey behavior and performance. Such striking parallels indicate that specialist herbivores in marine and terrestrial systems can evolve convergent ecological strategies despite 400 million years of independent evolution in vastly different habitats.C hemical cues and signals govern the processes that shape species demography, community structure, and ecosystem function in both terrestrial and marine ecosystems. However, the chemicals regulating these processes are better known for terrestrial systems, especially with regard to plant-herbivore interactions (1, 2). Terrestrial insect herbivores, most of which are trophic specialists (3), commonly locate prey by tracking plant volatiles (4). In response, plants induce chemical defenses both to reduce herbivory and to limit the spread of pathogens introduced by herbivore feeding (5); some also release volatile compounds that attract predators of their herbivores (6, 7). These volatile compounds involved in insect foraging and plant defense are well described; generally, they are nonpolar secondary compounds (or blends of compounds) that are plantspecific. In contrast, few herbivores in marine ecosystems are trophic specialists (8), and whether they use chemical cues to locate their prey remains poorly understood (9, 10). The identities of such foraging cues are unknown but are predicted to be polar compounds that diffuse readily through water (9, 10).Halimeda incrassata is the dominant seaweed within ...

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“…In addition, the results of the Microtox® analyses, used as a proxy of the production of chemical defenses, are not in accordance with the Latitudinal Gradient Hypothesis (LGH) used on land where plants allocate more in defensive traits under lower latitudes. It also shows that environmental factors are driving-forces that can strongly influence the specialized metabolism and its related bioactivity or putative ecological function (Pelletreau and Targett 2008;Puglisi et al 2014;Putz and Proksch 2010). A higher herbivory pressure in tropical ecosystems than in temperate ones can rely on the species richness and biomass of tropical ecosystems (Brown 2014;González-Bergonzoni et al 2012), but also to a stronger resistance of herbivores to plant metabolites (Craft et al 2013).…”

Section: Relationship Between Metabotypes and Bioactivitiesmentioning

confidence: 99%

Chemogeography of the red macroalgae Asparagopsis: metabolomics, bioactivity, and relation to invasiveness

et al. 2017

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Results Metabotypes showed a low divergence between tropical and temperate populations, while bioactivities were higher in temperate populations. However, these phenotypes varied significantly in time, with a higher variability in tropical regions. Bioactivities were high and stable in temperate regions, whereas they were low and much variable in tropical regions. Although the introduced lineage two exhibited the highest bioactivities, this lineage could also present variable proliferation fates. Conclusion The metabolomic approach partly discriminates macroalgal populations from various geographic origins. The production of chemical defenses assessed by the bioactivity assay does not match the macroalgal genetic lineage and seems more driven by the environment. The higher content of chemical defenses in temperate versus tropical populations is not in accordance with the LGH and cannot be related to the invasiveness of the macroalgae. AbstractIntroduction The Latitudinal Gradient Hypothesis (LGH) foresees that specialized metabolites are overexpressed under low latitudes, where organisms are subjected to higher herbivory pressure. The widespread macroalga Asparagopsis taxiformis is composed of six distinct genetic lineages, some of them being introduced in many regions. Objectives To study (i) metabolic fingerprints of the macroalga and (ii) its bioactivity in space and time, both as proxies of its investment in defensive traits, in order to assess links between bioactivities and metabotypes with macroalgal invasiveness. Methods 289 macroalgal individuals, from four tropical and three temperate regions, were analyzed using untargeted metabolomics and the standardized Microtox® assay.

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Marine chemical ecology in benthic environments

Abstract: This review covers the recent marine chemical ecology literature for benthic bacteria and cyanobacteria, macroalgae, sponges, cnidarians, molluscs, other benthic invertebrates, and fish.

Cited by 65 publications

References 226 publications

Nontargeted Screening of Halogenated Organic Compounds in Bottlenose Dolphins (Tursiops truncatus) from Rio de Janeiro, Brazil

Nontargeted Screening of Halogenated Organic Compounds in Bottlenose Dolphins (Tursiops truncatus) from Rio de Janeiro, Brazil

Marine and terrestrial herbivores display convergent chemical ecology despite 400 million years of independent evolution

Chemogeography of the red macroalgae Asparagopsis: metabolomics, bioactivity, and relation to invasiveness

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