Diversity and Evolution of Living Oysters

Guo, Ximing; Li, Cui; Wang, Haiyan; Xu, Zhe

doi:10.2983/035.037.0407

Cited by 63 publications

(62 citation statements)

References 88 publications

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“…Oysters are marine bivalve mollusks distributed worldwide in intertidal, estuarine, and shallow ocean areas where the environmental conditions are extremely variable, providing a model species for exploring adaptive evolution. Generally, different oyster species inhabit distinct latitudinal or vertical gradients because they have evolved species-specific adaptive capacities in different environments (Wang et al, , 2010Guo et al, 2018). For sympatric oyster species, however, we need to first classify them before conducting subsequent biological examinations.…”

Section: Introductionmentioning

confidence: 99%

“…Oyster classification is always difficult because of their high plasticity in shell morphology, which is sensitive to environmental heterogeneity. Genetic markers such as mitochondrial cytochrome oxidase I (COI) or nuclear 28S ribosomal RNA genes have been developed to identify these oysters in previous studies (Wang et al, 2004;Guo et al, 2018). Moreover, a highthroughput, efficient, and easy to visualize method of highresolution melting (HRM) curve analysis has been applied to taxonomic studies in the classification of Crassostrea oyster species (Wang et al, 2014(Wang et al, , 2015, which can be extensively used to rapidly and reliably identify oysters collected from multiple locations in large sampling size.…”

Section: Introductionmentioning

confidence: 99%

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Molecular and Fitness Data Reveal Local Adaptation of Southern and Northern Estuarine Oysters (Crassostrea ariakensis)

Wang

et al. 2020

Front. Mar. Sci.

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Natural selection and isolation are both important for understanding the geographic distribution of marine species and environmental responses to changing climate. In this study, we revealed distinct genetic variation in Crassostrea ariakensis by comparing the COI gene segment sequence in northern and southern oysters partitioned by the Yangtze River estuary. Reciprocal hybridization and intrapopulation crosses clarified their taxonomic status as the same species. There was no heterosis in the survival and growth of the hybrids, while the maternal effect was observed in larvae from eggs in the native habitat that showed higher fitness. Both the northern and southern F 1 progenies exhibited positive performance in fitness traits, including survivorship, respiration rate, and growth, in their native habitats compared to that in their non-native habitats, indicating a strong signature of local adaptation. The oysters dwelling in the warm/southern habitats evolved a higher thermotolerance of LT 50 , while the oysters inhabiting the high-salinity/northern habitats had a 2.43 higher LS 50 than that of their southern counterparts. After strong natural selection in the northern environments, the higher survival of the F 1 progenies from the southern oysters under heat shock indicates an evolved genetic basis for its higher thermal tolerance. Strong environmental gradients, especially for temperature and salinity, and geographic isolation by the interaction between coastal currents and the Yangtze River estuary potentially contribute to shaping the distribution pattern and adaptive divergence of C. ariakensis in China.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular and Fitness Data Reveal Local Adaptation of Southern and Northern Estuarine Oysters (Crassostrea ariakensis)

Wang

et al. 2020

Front. Mar. Sci.

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“…Oyster reefs best develop at shallow depths in estuarine, bay or lagoonal settings, as well as in marine shallow subtidal situations [2,[13][14][15]. True oysters (Ostreoidea) may have been arisen at the Permian-Triassic boundary (revised in [16]), with families Ostreidae and Gryphaeidae, and their reefs being positively documented in the Mesozoic and Cenozoic [2,[17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Offshore Neopycnodonte Oyster Reefs in the Mediterranean Sea

Angeletti

Taviani

2020

Diversity

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Oysters are important ecosystem engineers best known to produce large bioconstructions at shallow depth, whilst offshore deep-subtidal oyster reefs are less widely known. Oyster reefs engineered by Neopycnodonte cochlear (family Gryphaeidae) occur at various sites in the Mediterranean Sea, between 40 and 130 m water depths. Remotely Operated Vehicle surveys provide new insights on this rather neglected reef types with respect to their shape, dimensions and associated biodiversity. We suggest that these little contemplated reefs should be taken in due consideration for protection.

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“…These were group 1: O. aupouria/stentina from China, Japan, and New Zealand, which was recommended as O. equestris (western Pacific); group 2: O. equestris from Gulf of California, Argentina, Florida, and North Carolina, which was recommended as O. equestris (Americas); group 3: O. stentina from southeastern Spain and eastern Tunisia, which Hu et al (2019) described as a new species, O. neostentina ; and group 4: O. stentina from northern Spain, Portugal, Morocco, and northern Tunisia. Guo et al (2018) also suggested that the O. stentina/aupouria/equestris complex be distinguished as three separate species, one of which was O. equestris . Our phylogenetic analyses placed Hawai’i specimens with the western Pacific O. equestris .…”

Section: Discussionmentioning

confidence: 99%

“…Cryptic morphology within and among oyster species causes taxonomic confusion and may complicate aquaculture and management efforts, however, oyster identities and evolutionary histories are increasingly being resolved using genetic and genomic technologies ( e.g. Guo et al 2018; Hamaguchi et al 2017; Li et al 2017a; Li et al 2017b). In Hawai‘i, resurgence in traditional fishpond aquaculture and an associated interest in farming both native and non-native oysters has spurred recent interests to identify unknown species.…”

Section: Introductionmentioning

confidence: 99%

Genetic analysis identifies theOstrea stentina/aupouria/equestrisoyster species complex in Hawai‘i, and resolves its lineage as the western PacificO. equestris

Sutton

Nishimoto

Schrader

et al. 2020

Preprint

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BackgroundExtensive phenotypic plasticity in oysters makes them difficult to identify based on morphology alone, but their identities can be resolved by applying genetic and genomic technologies. In this study, we collected unknown oyster specimens from Hawaiian waters for genetic identification.MethodsWe sequenced two partial gene fragments, mitochondrial 16S ribosomal RNA (16S) and cytochrome c oxidase subunit I (COI), in 48 samples: 27 unidentified oyster specimens collected from two locations on O‘ahu, 13 known specimens from a hatchery in Hilo, Hawai‘i Island, and 8 known specimens from Hilo Bay, Hawai‘i Island.ResultsMolecular data identified approximately 85% of unknown samples as belonging to the Ostrea stentina/aupouria/equestris species complex, a globally distributed group with a history of uncertain and controversial taxonomic status. The remaining unknown samples were the native Dendostrea sandvichensis (G. B. Sowerby II, 1871), and nonnative Crassostrea gigas (Thunberg, 1793), the latter of which is a commercial species that was introduced to Hawai‘I from multiple sources during the 20th century. Phylogenetic analysis placed Hawai‘i Ostrea alongside samples from China, Japan, and New Zealand, grouping them within the recently classified western Pacific O. equestris. Until now, four extant species of true oyster have been documented in Hawai‘i. This study expands the known range of O. equestris by providing the first verification of its occurrence in Hawai‘i.

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Diversity and Evolution of Living Oysters

Cited by 63 publications

References 88 publications

Molecular and Fitness Data Reveal Local Adaptation of Southern and Northern Estuarine Oysters (Crassostrea ariakensis)

Molecular and Fitness Data Reveal Local Adaptation of Southern and Northern Estuarine Oysters (Crassostrea ariakensis)

Offshore Neopycnodonte Oyster Reefs in the Mediterranean Sea

Genetic analysis identifies theOstrea stentina/aupouria/equestrisoyster species complex in Hawai‘i, and resolves its lineage as the western PacificO. equestris

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