Chemical ecology of marine plankton

Schwartz, Emily; Poulin, Remington X.; Mojib, Nazia; Kubanek, Julia

doi:10.1039/c6np00015k

Cited by 38 publications

(31 citation statements)

References 119 publications

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“…Natural plankton communities may include multiple diatom and non-diatom populations producing a variety of bioactive secondary metabolites (e.g., Strom 2008;Ianora et al 2012;Schwartz et al 2016). For example, S. marinoi growth was inhibited in the presence of a domoic acid-producing strain of P. delicatissima (Prince et al 2013).…”

Section: Mesozooplankton Responsementioning

confidence: 99%

Diatom‐produced allelochemicals trigger trophic cascades in the planktonic food web

Franzè

Pierson

Stoecker

et al. 2017

Limnology & Oceanography

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Diatoms produce a series of cytotoxic secondary metabolites such as polyunsaturated aldehydes (PUA) in response to cell injury or stress. However, little information exists on the PUA effects on the pelagic food web. A set of experiments was conducted in the Chesapeake Bay and the coastal Atlantic waters using dissolved PUA (2E,4E-octadienal and 2E,4E-heptadienal), natural assemblages of phytoplankton and microzooplankton, and the copepod Acartia tonsa. The results demonstrate that PUA primarily acts as deterrent for microzooplankton herbivory on diatoms, while enhancing herbivory on picophytoplankton. This switch should favor PUA-producing diatoms by simultaneously reducing direct grazing losses and competition. Additionally, PUA stimulated copepod predation on microzooplankton, particularly on ciliates. Combined, these effects have the potential to disrupt growth-grazing equilibrium in the pelagic food web and create an opportunity for bloom development.

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Section: Mesozooplankton Responsementioning

confidence: 99%

Diatom‐produced allelochemicals trigger trophic cascades in the planktonic food web

Franzè

Pierson

Stoecker

et al. 2017

Limnology & Oceanography

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“…Nevertheless, based on the extremely complex symbiotic relationship between plants and microbes, more work is still needed in order to better understand the important interactions between the inter- or intra-players of ecosystem function, plants and their associated microorganisms. Recent evidence showed that chemical ecology is a robust and efficient methodology to uncover the behavior and ecological functions of microbes (Schwartz et al, 2016). …”

Section: Introductionmentioning

confidence: 99%

Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove (Kandelia obovata) Rhizosphere Environment

Lao

Jin

et al. 2016

Front. Microbiol.

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Mangrove rhizosphere environment harbors diverse populations of microbes, and some evidence showed that rhizobacteria behavior was regulated by quorum sensing (QS). Investigating the diverse profiles of QS molecules in mangrove ecosystems may shed light on the bacterial roles and lead to a better understanding of the symbiotic interactions between plants and microbes. The aims of the current study focus on identifying AI-1 type QS signals, i.e., acyl homoserine lactones (AHLs), in Kandelia obovata rhizosphere environment. Approximately 1200 rhizobacteria were screened and 184 strains (15.3%) tested were positive. Subsequent 16s rRNA gene sequencing and dereplication analyses identified 24 species from the positive isolates, which were affiliated to three different phyla, including Proteobacteria, Firmicutes, and Actinobacteria. Thin-layer chromatography separation of extracts revealed diverse AHL profiles and detected at least one active compound in the supernatant of these 24 cultivable AHL-producers. The active extracts from these bacterial isolates were further evaluated by ultra performance liquid chromatography-mass spectrometry, and the carbon side chain length ranged from C4 to C14. This is the first report on the diversity of AI-1 type auto-inducers in the mangrove plant K. obovata, and it is imperative to expand our knowledge of plant-bacteria interactions with respect to the maintenance of wetland ecosystem health.

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“…This study emphasises that the environment within which the animal lives is central to the cues received to inform the behavioural trade-offs that balance risk and vigilance against other fitness promoting activities. Recent research emphasises the importance of water-borne chemicals for aquatic organisms, and that chemical information can play a central role in key behavioural decisions associated with antipredator responses 56 , 57 . Chemicals that are passively or actively released into the surrounding water contain ecologically relevant information that includes reproductive state 58 , 59 , stress 60 , disturbance 61 , habitat suitability and availability 62 , 63 , and the type, size and quality of a prey item 64 .…”

Section: Discussionmentioning

confidence: 99%

Algae associated with coral degradation affects risk assessment in coral reef fishes

McCormick

Barry

Allan

2017

Sci Rep

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Habitat degradation alters the chemical landscape through which information about community dynamics is transmitted. Olfactory information is crucial for risk assessment in aquatic organisms as predators release odours when they capture prey that lead to an alarm response in conspecific prey. Recent studies show some coral reef fishes are unable to use alarm odours when surrounded by dead-degraded coral. Our study examines the spatial and temporal dynamics of this alarm odour-nullifying effect, and which substratum types may be responsible. Field experiments showed that settlement-stage damselfish were not able to detect alarm odours within 2 m downcurrent of degraded coral, and that the antipredator response was re-established 20–40 min after transferral to live coral. Laboratory experiments indicate that the chemicals from common components of the degraded habitats, the cyanobacteria, Okeania sp., and diatom, Pseudo-nitzschia sp.prevented an alarm odour response. The same nullifying effect was found for the common red algae, Galaxauria robusta, suggesting that the problem is of a broader nature than previously realised. Those fish species best able to compensate for a lack of olfactory risk information at key times will be those potentially most resilient to the effects of coral degradation that operate through this mechanism.

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Chemical ecology of marine plankton

Cited by 38 publications

References 119 publications

Diatom‐produced allelochemicals trigger trophic cascades in the planktonic food web

Diatom‐produced allelochemicals trigger trophic cascades in the planktonic food web

Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove (Kandelia obovata) Rhizosphere Environment

Algae associated with coral degradation affects risk assessment in coral reef fishes

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