Two newly discovered <i>Grateloupia</i> (Halymeniaceae, Rhodophyta) species on aquaculture rafts on the west coast of South Africa, including the widely introduced <i>Grateloupia turuturu</i>

Bolton, John J.; Clerck, Olivier De; Francis, Caitlynne Melanie; Siyanga-Tembo, Fridah

doi:10.2216/15-104.1

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…This led Ardré & Gayral (1961), and subsequently Dawson et al (1964), to synonymise a number of Atlantic species (G. lanceola complex) with G. doryphora. Several studies have since demonstrated that the global invasion of foliose Grateloupia can be largely ascribed to G. turuturu (Saunders & Withall 2006;D'Archino et al 2007;Aguilar-Rosas et al 2012;Araújo de Azevedo et al 2015;Bolton et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Morphological and molecular assessment of Grateloupia (Halymeniales, Rhodophyta) from Egypt revealed a new introduced species in the Mediterranean Sea, Grateloupia gibbesii

et al. 2021

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The Mediterranean Sea is a hotspot for introduced marine species, including seaweeds. Among red algae, Grateloupia, with no less than eight introduced species, occupies a prominent position. Here, we report a large foliose Grateloupia species collected in Eastern Harbour, Alexandria, Egypt, which had previously been reported as G. acuminata and G. doryphora. Comparison of rbcL gene sequences revealed that the specimens represent G. gibbesii, a species originally described from Charleston, South Carolina, USA and potentially distributed in the warm temperate and tropical western Atlantic Ocean. The species has been known only from a single location in Alexandria since the early 1990s, it has not been reported in extensive surveys prior to that date, and there are no reports from other Mediterranean sites. This indicates a recent introduction, with shipping the likely vector. We describe the vegetative and reproductive morphology of G. gibbesii as the basis for evaluating variation in female reproductive structures and generic concepts in Grateloupia.

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Section: Introductionmentioning

confidence: 99%

Morphological and molecular assessment of Grateloupia (Halymeniales, Rhodophyta) from Egypt revealed a new introduced species in the Mediterranean Sea, Grateloupia gibbesii

et al. 2021

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“…The vector for establishment of Grateloupia turuturu in the Damariscotta Estuary is unknown. Globally, G. turuturu's introduction is associated with shellfish aquaculture (Verlaque et al 2005, Bolton et al 2016, and there are many shellfish aquaculture lease sites along the Damariscotta estuary, as well as historical experiments with imported oysters (Packie et al 1976). However, there are numerous other possible vectors including hull-fouling of boats that move between the Damariscotta and areas south of Maine where G. turuturu is common.…”

Section: Discussionmentioning

confidence: 99%

“…A common invader is Grateloupia turuturu Yamada, a low to subtidal red alga originally described from Japan (Yamada 1941) that now has a nearly global distribution after primary and secondary introductions (e.g. Marston and Villalard-Bohnsack 2002, Verlaque et al 2005, Saunders and Withall 2006, D'Archino et al 2007, Bolton et al 2016, Brodie et al 2016. Following introduction to the Northwestern Atlantic (Rhode Island) in 1994 (Villalard-Bohnsack and Harlin 1997, Gavio andFredericq 2002, Marston andVillalard-Bohnsack 2002), G. turuturu spread north into the Gulf of Maine ( Figure 1) and south into Long Island Sound (Mathieson et al 2008, Macroalgal Herbarium Consortium 2018.…”

Section: Introductionmentioning

confidence: 99%

Unexpected reproductive traits of Grateloupia turuturu revealed by its resistance to bleach-based biosecurity protocols

Capistrant-Fossa

Brawley

2019

Botanica Marina

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A non-indigenous alga, Grateloupia turuturu (Halymeniales, Rhodophyta), was discovered in the Damariscotta Estuary (Maine, USA) in 2017, over 200 km north of its last reported location. Because of the presence of coastal facilities (aquaculture, marine laboratories) among potential vectors, we evaluated a mandated biosecurity protocol, namely, seawater treated with bleach at 50 ppm (50 mg l−1) free chlorine for ≥2 h and measured using test strips, for lethality against G. turuturu and several native algae. We report unexpected resilience to bleach-treatment (Mastocarpus > Grateloupia > Palmaria). Holdfasts of G. turuturu and Mastocarpus stellatus survived 50 and 1000 ppm free chlorine, respectively. Cystocarps on cultured blades of G. turuturu were particularly resistant to bleach-treatment; they produced outgrowths on fragmenting blades that became fertile tetrasporophytes in culture, suggesting reproductive adaptations of cystocarps to stressful conditions that may have broader evolutionary significance. Juvenile, microscopic crusts of G. turuturu were also bleach-resistant if covered by diatoms, and developed upright axes. Free chlorine test strips were inaccurate in seawater, and their use could increase the risk of failed biosecurity as a vector for invasion. Because chlorination at economic and environmentally safe levels is insufficient, we recommend a combination of treatments for comprehensive biosecurity.

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“…5) are con-specific with G. orientalis as mentioned by Wolf et al (2014). Considering the generally limited distribution of the G. filicina-like species in the Northwest Pacific (refer to Figs 3 & 4) and the many species introduction reports from the Northwest Pacific to worldwide (e.g., Verlaque et al 2005, Bolton et al 2016, it is highly probable that this species was also introduced to the USA and Brazil from the Northwest Pacific as a cryptic introduction.…”

Section: Numerous Misidentifications Of Grateloupia Filicina-like Spe...mentioning

confidence: 94%

Insight into the species identification and distribution of Grateloupiaceae (Halymeniales, Rhodophyta) having Grateloupia filicina-like morphology in the Northwest Pacific

Kim¹,

Boo²,

Yoon³

et al. 2023

Algae

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Accurately identifying species is the basis of all biological studies. There has been much confusion in the identification of Grateloupiacean species, which have finely pinnate gross morphology similar to Grateloupia filicina (the type species of the family). The objective of this study was to comprehensively investigate species identification and distribution of G. filicina-like species in the Northwest Pacific, based on the rbcL sequences. A total of 118 specimens from 78 sites in Korea and Japan were collected from 2001 to 2021 and analyzed for their rbcL sequences. Additional 341 sequences downloaded from the GenBank were included in our comprehensive dataset. Based on these sequences, we documented the nomenclatural history and geographical distribution of the species, and commented on the application of species name. G. asiatica was the most abundant G. filicina-like species in the Northwest Pacific, and its high degree of morphological variation caused many misidentifications. In particular, G. dalianensis, G. serra and G. variata require reconsideration of their conspecificity with G. asiatica using more specimens from China. By contrast, G. oligoclora was presumed to be a heterotypic synonym of G. subpectinata. The occurrence of G. acuminata, G. ramosissima, and G. livida in Korea resulted from misidentifications with other species.

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Two newly discovered Grateloupia (Halymeniaceae, Rhodophyta) species on aquaculture rafts on the west coast of South Africa, including the widely introduced Grateloupia turuturu

Cited by 9 publications

References 39 publications

Morphological and molecular assessment of Grateloupia (Halymeniales, Rhodophyta) from Egypt revealed a new introduced species in the Mediterranean Sea, Grateloupia gibbesii

Morphological and molecular assessment of Grateloupia (Halymeniales, Rhodophyta) from Egypt revealed a new introduced species in the Mediterranean Sea, Grateloupia gibbesii

Unexpected reproductive traits of Grateloupia turuturu revealed by its resistance to bleach-based biosecurity protocols

Insight into the species identification and distribution of Grateloupiaceae (Halymeniales, Rhodophyta) having Grateloupia filicina-like morphology in the Northwest Pacific

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