Devil's tongue weed (Grateloupia turuturu Yamada) in northern Portugal: Passenger or driver of change in native biodiversity?

Mulas, Martina; Bertocci, Iacopo

doi:10.1016/j.marenvres.2016.04.007

Cited by 16 publications

(8 citation statements)

References 63 publications

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“…The ability of fragments of the invasive seaweed, C. taxifolia , to establish and grow was markedly lower in seagrass control and partial removal (SC and SPR) than in unvegetated plots (BS and STR), suggesting that both above‐ and below‐ground seagrass biomass sustain resistance to invasion. These results are in accordance with previous studies from marine (Ceccherelli et al, ; Glasby, ; Mulas & Bertocci, ; Scheibling & Gagnon, ; South & Thomsen, ; Thomsen et al, ; Valentine & Johnson, ) and terrestrial habitats (D'Antonio & Vitousek, ; Diez et al, ; Hobbs & Huenneke, ) showing that invasive macrophytes are often opportunistic species that rely on native community disruption for establishment and spread. Such opportunistic behaviour of invaders does not imply weak effects on natives; in fact, once established, invasive species can trigger novel positive feedback mechanisms that facilitate their persistence at the expense of native habitat‐formers and associated species (Bauer, ; Bulleri, Benedetti‐Cecchi, Ceccherelli, & Tamburello, ; Gaertner et al, ).…”

Section: Discussionsupporting

confidence: 92%

Propagule composition regulates the success of an invasive seaweed across a heterogeneous seascape

et al. 2019

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1. Propagule pressure is acknowledged as a key determinant of invasion success.Nonetheless, the role of morphological or physiological attributes of propagules (i.e. their quality) in regulating invader establishment has been little explored. In particular, no study has investigated how the presence of propagules differing in quality within an inoculum influences establishment across heterogeneous landscapes.2. We experimentally tested the hypothesis that the quality (+Fronds+Rhizoids; +Fronds−Rhizoids; −Fronds+Rhizoids) and the diversity (1, 2 and 3 fragment types) of vegetative fragments of the seaweed Caulerpa taxifolia determine their establishment success across seascapes consisting of bare sediments and patches of the seagrass Zostera muelleri exposed to different disturbance intensities (control, seagrass canopy clipping and total removal).3. After 6 weeks, seaweed biomass, stolon and frond length, frond and rhizoid number were generally greater in unvegetated habitats (bare sediments and total seagrass removal) than full or reduced seagrass canopies. The type and the diversity of types of fragments inoculated had significant effects on the final biomass and morphological features of C. taxifolia only in vegetated habitats. In control plots, inocula of fragments retaining both fronds and rhizoids achieved higher biomass, developed longer stolons and more fronds. In canopy clipping plots, mixed inocula of +Fronds+Rhizoids and −Fronds+Rhizoids fragments had the greatest biomass and stolon length. Synthesis.Assessing how propagules differing in quality perform in different habitats might be not sufficient to draw a comprehensive picture of invasion risk, as their establishment can be modulated by both negative and positive interactions among them. Propagule composition should be, therefore, considered as a further dimension of propagule pressure. Our results also suggest that the relevance of specific propagule traits for invader establishment decreases from intact to degraded habitats. Considering propagule size in terms of amount of competent propagules, rather than an absolute measure, would refine our ability of predicting invasion risk across habitats differing in biotic or abiotic conditions.

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Section: Discussionsupporting

confidence: 92%

Propagule composition regulates the success of an invasive seaweed across a heterogeneous seascape

et al. 2019

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“…In recent decades, this seaweed was recorded on the Atlantic Coast of Europe [ 9 ], likely originating from aquaculture activities related to oyster farming and/or global shipping [ 10 ]. Although G. turuturu is non-native species to the Atlantic and may have been erroneously labelled as an invasive species [ 11 ], it does not seem to have any negative impacts in coastal environments. In fact, G. turuturu seems to contribute to the maintenance of autochthonous seaweed species and to preserve natural biodiversity [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Polar Lipids Composition, Antioxidant and Anti-Inflammatory Activities of the Atlantic Red Seaweed Grateloupia turuturu

et al. 2021

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Grateloupia turuturu Yamada, 1941, is a red seaweed widely used for food in Japan and Korea which was recorded on the Atlantic Coast of Europe about twenty years ago. This seaweed presents eicosapentaenoic acid (EPA) and other polyunsaturated fatty acids (PUFAs) in its lipid fraction, a feature that sparked the interest on its potential applications. In seaweeds, PUFAs are mostly esterified to polar lipids, emerging as healthy phytochemicals. However, to date, these biomolecules are still unknown for G. turuturu. The present work aimed to identify the polar lipid profile of G. turuturu, using modern lipidomics approaches based on high performance liquid chromatography coupled to high resolution mass spectrometry (LC–MS) and gas chromatography coupled to mass spectrometry (GC–MS). The health benefits of polar lipids were identified by health lipid indices and the assessment of antioxidant and anti-inflammatory activities. The polar lipids profile identified from G. turuturu included 205 lipid species distributed over glycolipids, phospholipids, betaine lipids and phosphosphingolipids, which featured a high number of lipid species with EPA and PUFAs. The nutritional value of G. turuturu has been shown by its protein content, fatty acyl composition and health lipid indices, thus confirming G. turuturu as an alternative source of protein and lipids. Some of the lipid species assigned were associated to biological activity, as polar lipid extracts showed antioxidant activity evidenced by free radical scavenging potential for the 2,2′-azino-bis-3-ethyl benzothiazoline-6-sulfonic acid (ABTS●+) radical (IC50 ca. 130.4 μg mL−1) and for the 2,2-diphenyl-1-picrylhydrazyl (DPPH●) radical (IC25 ca. 129.1 μg mL−1) and anti-inflammatory activity by inhibition of the COX-2 enzyme (IC50 ca. 33 µg mL−1). Both antioxidant and anti-inflammatory activities were detected using a low concentration of extracts. This integrative approach contributes to increase the knowledge of G. turuturu as a species capable of providing nutrients and bioactive molecules with potential applications in the nutraceutical, pharmaceutical and cosmeceutical industries.

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“…It should be noted that the models are not mutually exclusive, and intermediate situations may occur. However, this bipartition enabled the researchers to conclude that G. turuturu did not have an invasive character as they did not detect any ecological changes caused by its presence, but rather a temporary character, not damaging the ecosystem (taking advantage of only one already fragile) [5].…”

Section: Introductionmentioning

confidence: 99%

Extraction and Analysis of Compounds with Antibacterial Potential from the Red Alga Grateloupia turuturu

Cardoso

Cotas

Rodrigues

et al. 2019

JMSE

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Nowadays, the development of new drugs only relies on a small number of molecules and 50% of all existent drugs are extracted or synthetically obtained. This work intends to evaluate the antibacterial potential of the ethanolic and polysaccharide extracts obtained from Grateloupia turuturu and to characterize the composition of the alga’s polysaccharides by FTIR-ATR. We used sequential extraction to obtain the extracts that were tested against S. aureus and E. coli. The ethanolic extracts in E. coli, at the highest concentration used (15 mg mL−1) showed 45.7% (Tetrasporophyte extract) and 55.1% (Carposporophyte extract) of growth reduction and in S. aureus 56.2% (T extract) and 51.8% (C extract). Polysaccharide extracts started showing significant reduction effect on E. coli and S. aureus growth at 7.5 mg mL−1 with a reduction of 54.9% and 39.5%, respectively. At 15 mg mL−1 the reduction observed was 88.5% and 85.4%. The FTIR-ATR allowed to characterize G. turuturu’s polysaccharides concluding that it is composed by a hybrid kappa/iota carrageenan with traces of agar, in both phases of the life cycle. This work allows us to conclude about the antibacterial properties of this alga and the compounds that might be behind this activity, showing that there’s a lot more than a small number of molecules that can be used as natural drugs.

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Devil's tongue weed (Grateloupia turuturu Yamada) in northern Portugal: Passenger or driver of change in native biodiversity?

Cited by 16 publications

References 63 publications

Propagule composition regulates the success of an invasive seaweed across a heterogeneous seascape

Propagule composition regulates the success of an invasive seaweed across a heterogeneous seascape

Polar Lipids Composition, Antioxidant and Anti-Inflammatory Activities of the Atlantic Red Seaweed Grateloupia turuturu

Extraction and Analysis of Compounds with Antibacterial Potential from the Red Alga Grateloupia turuturu

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