The chemical defences of the invasive alga Sargassum muticum (Yendo) Fensholt correlate to mesoherbivore diversity, but not to time-since-invasion

Kurr, Martyn; Davies, Andrew J.

doi:10.1007/s10750-019-3939-2

Cited by 7 publications

(1 citation statement)

References 96 publications

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“…These communities can also be significantly different even over relatively small spatial scales, such as less than 10 km in some cases [ 31 , 32 , 33 , 34 ]. Photophysiological and biochemical heterogeneity between structures has been documented for Sargassum spp., with differences in photosynthetic rates [ 35 ], phlorotannin content [ 36 ] and C:N ratios [ 37 ] being reported. The chemical microenvironment found in different structures could thus play a role in shaping microbial community composition and regulating host–microbe interactions.…”

Section: Introductionmentioning

confidence: 99%

The Microbiome of the Reef Macroalga Sargassum ilicifolium in Singapore

Bollati

Maithani

et al. 2021

Microorganisms

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The large canopy-forming macroalga, Sargassum ilicifolium, provides shelter and food for numerous coral reef species, but it can also be detrimental at high abundances where it outcompetes other benthic organisms for light and space. Here, we investigate the microbial communities associated with S. ilicifolium in Singapore, where it is an abundant and important member of coral reef communities. We collected eight complete S. ilicifolium thalli from eight island locations along an approximate 14 km east-to-west transect. Each thallus was dissected into three separate parts: holdfast, vesicles, and leaves. We then characterized the bacterial communities associated with each part via polymerase chain reaction (PCR) amplification of the 16S rRNA gene V4 region. We then inferred predicted metagenome functions using METAGENassist. Despite the comparatively short distances between sample sites, we show significant differences in microbial community composition, with communities further differentiated by part sampled. Holdfast, vesicles and leaves all harbor distinct microbial communities. Functional predictions reveal some separation between holdfast and leaf communities, with higher representation of sulphur cycling taxa in the holdfast and higher representation of nitrogen cycling taxa in the leaves. This study provides valuable baseline data that can be used to monitor microbial change, and helps lay the foundation upon which we can begin to understand the complexities of reef-associated microbial communities and the roles they play in the functioning and diversity of marine ecosystems.

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Section: Introductionmentioning

confidence: 99%

The Microbiome of the Reef Macroalga Sargassum ilicifolium in Singapore

Bollati

Maithani

et al. 2021

Microorganisms

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Formulated algae-based feed with low polyphenol content and its effect on the feeding preference of juvenile blue abalone Haliotis fulgens

et al. 2023

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Shifting chemical defence or novel weapons? A review of defence traits in Agarophyton vermiculophyllum and other invasive seaweeds

Wang

Ren

Wang

et al. 2021

Mar Life Sci Technol

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Seaweed bioinvasions increasingly affect coastal environments around the world, which increases the need for predictive models and mitigation strategies. The biotic interactions between seaweed invaders and invaded communities are often considered a key determinant of invasion success and failure and we here revise the current evidence that the capacity of seaweed invaders to deter enemies in newly reached environments correlates with their invasion success. Particularly efficient chemical defences have been described for several of the more problematic seaweed invaders during the last decades. However, confirmed cases in which seaweed invaders confronted un-adapted enemies in newly gained environments with deterrents that were absent from these environments prior to the invasion (so-called “novel weapons”) are scarce, although an increasing number of invasive and non-invasive seaweeds are screened for defence compounds. More evidence exists that seaweeds may adapt defence intensities to changing pressure by biological enemies in newly invaded habitats. However, most of this evidence of shifting defence was gathered with only one particular model seaweed, the Asia-endemic red alga Agarophyton vermiculophyllum, which is particularly accessible for direct comparisons of native and non-native populations in common garden experiments. A. vermiculophyllum interacts with consumers, epibionts and bacterial pathogens and in most of these interactions, non-native populations have rather gained than lost defensive capacity relative to native conspecifics. The increases in the few examined cases were due to an increased production of broad-spectrum deterrents and the relative scarcity of specialized deterrents perhaps reflects the circumstance that seaweed consumers and epibionts are overwhelmingly generalists.

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The chemical defences of the invasive alga Sargassum muticum (Yendo) Fensholt correlate to mesoherbivore diversity, but not to time-since-invasion

Cited by 7 publications

References 96 publications

The Microbiome of the Reef Macroalga Sargassum ilicifolium in Singapore

The Microbiome of the Reef Macroalga Sargassum ilicifolium in Singapore

Formulated algae-based feed with low polyphenol content and its effect on the feeding preference of juvenile blue abalone Haliotis fulgens

Shifting chemical defence or novel weapons? A review of defence traits in Agarophyton vermiculophyllum and other invasive seaweeds

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