Actuopaleontological characterization and molluscan biodiversity of a protected tidal flat and shallow subtidal at the northern Red Sea

Zuschin, Martin; Ebner, Claudia

doi:10.1007/s10347-015-0428-6

Cited by 13 publications

(6 citation statements)

References 39 publications

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“…Brachidontes pharaonis , a mytilid bivalve, is often associated with Pirenella conica in intertidal settings but is also frequently found in hypersaline lakes in the Mediterranean and the Red Sea region (Safriel et al ., ; Gianguzza et al ., ). Brachidontes is known to survive in a wide range of temperature and salinity (Sarà et al ., ; Zuschin & Ebner, ) and thrives in salt ponds in the Mediterranean, which display salinities as high as 40‰ in winter and 53‰ in summer, and temperature fluctuations between 9°C in December and 30°C in August (Sarà et al ., ). The disappearance of stenohaline marine fauna and the coeval occurrence of accumulations of Brachidontes and Pirenella is interpreted to indicate the initiation of hypersaline conditions.…”

Section: Discussion and Interpretationmentioning

confidence: 99%

“…The sediments associated with the crusts and spherules on top of both marine successions are characterized by accumulations of Pirenella conica and Brachidontes pharaonis . Pirenella conica , a potamidid gastropod, is a euryhaline species that is usually found in mangrove habitats and tidal flats along the Red Sea coast (Zuschin & Ebner, ). Brachidontes pharaonis , a mytilid bivalve, is often associated with Pirenella conica in intertidal settings but is also frequently found in hypersaline lakes in the Mediterranean and the Red Sea region (Safriel et al ., ; Gianguzza et al ., ).…”

Section: Discussion and Interpretationmentioning

confidence: 99%

“…The disappearance of stenohaline marine fauna and the coeval occurrence of accumulations of Brachidontes and Pirenella is interpreted to indicate the initiation of hypersaline conditions. Brachidontes pharaonis is a nestling bivalve that byssally attaches to hard substrates and may form dense clusters in tidal flat settings (Zuschin & Ebner, 2015). After death, clusters can be reworked and transported to form shell accumulations or can be buried and preserved in situ.…”

Section: Depositional Environment and Depth Distributionmentioning

confidence: 99%

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Pleistocene sea‐floor fibrous crusts and spherulites in the Danakil Depression (Afar, Ethiopia)

et al. 2018

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Pleistocene fibrous aragonite fabrics, including crusts and spherules, occur in the Danakil Depression (Afar, Ethiopia) following the deposition of two distinctive Middle and Late Pleistocene coralgal reef units and pre‐dating the precipitation of evaporites. Crusts on top of the oldest reef unit (Marine Isotope Stage 7) cover and fill cavities within a red algal framework. The younger aragonite crusts directly cover coralgal bioherms (Marine Isotope Stage 5) and associated deposits. Their stratigraphic position between marine and evaporitic deposits, and their association to euryhaline molluscs, suggest that the crusts and spherules formed in restricted semi‐enclosed conditions. The availability of hard substrate controls crust formation with crusts more often found on steep palaeo‐slopes, from sea level up to at least 80 m depth, while spherules mainly occur associated with mobile substrate. Crusts reach up to 30 cm in thickness and can be microdigitate, columnar (branching and non‐branching) or non‐columnar, with laminated and non‐laminated fabrics. Two different lamination types are found within the crystalline fabrics: (i) isopachous lamination; and (ii) irregular lamination. These two types of lamination can be distinguished by the organization of the aragonite fibres, as well as the lateral continuity of the laminae. Scanning electron microscopy with energy dispersive X‐ray spectroscopy analyses on well‐preserved samples revealed the presence of Mg‐silicate laminae intercalated with fibrous aragonite, as well as Mg‐silicate aggregates closely associated with the fibrous aragonite crusts and spherules. The variety of observed fabrics results from a continuum of abiotic and microbial processes and, thus, reflects the tight interaction between microbially mediated and abiotic mineralization mechanisms. These are the youngest known isopachously laminated, digitate and columnar branching fibrous crusts associated with a transition from marine to evaporitic conditions. Understanding the context of formation of these deposits in Afar can help to better interpret the depositional environment of the widespread Precambrian sea‐floor precipitates.

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Section: Discussion and Interpretationmentioning

confidence: 99%

Section: Discussion and Interpretationmentioning

confidence: 99%

Section: Depositional Environment and Depth Distributionmentioning

confidence: 99%

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Pleistocene sea‐floor fibrous crusts and spherulites in the Danakil Depression (Afar, Ethiopia)

et al. 2018

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“…Data were collected from primary literature, major monographs and museum collections (see Appendix S2). Substantial information was derived from Oliver (), Dekker & Orlin (), Huber () and from our own field studies (Zuschin & Oliver, , ; Zuschin & Ebner, ). Taxonomic nomenclature was primarily based on the World Register of Marine Species (WoRMS Editorial Board, ).…”

Section: Methodsmentioning

confidence: 99%

What guides invasion success? Ecological correlates of arrival, establishment and spread of Red Sea bivalves in the Mediterranean Sea

Nawrot

Chattopadhyay²,

Zuschin

2015

Diversity and Distributions

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Aim The opening of the Suez Canal in 1869 re‐established the direct link between long‐separated biogeographic realms, allowing hundreds of marine species to spread from the Red Sea to the Mediterranean. We use marine bivalves to relate species‐level attributes to successful transition through successive stages of the invasion process. Location Mediterranean and Red Sea. Methods We compiled data on taxonomic composition, body size, life habit and geographic distribution of the Red Sea bivalve fauna from published literature, museum collections and our own field surveys. Using multimodel inference, we examined selectivity of the Lessepsian invasion and identify traits that distinguish successful species at three major stages of invasion: arrival, establishment and spread. Results The upper limit of bathymetric range and occurrence outside the tropical zone in other regions are the strongest predictors of successful transition through the Suez Canal. Establishment in the Mediterranean is positively correlated with earlier arrival and association with hard‐bottom habitats. Preference for hard substrates together with large body size is the primary factor distinguishing invasive aliens representing a significant threat to recipient ecosystems from other established species. Main conclusions The relative strength of abiotic and biotic filters changes along the course of the invasion: environmental affinity and climate match constrain the pool of potential invaders, while the establishment in the new region and invasive status depend on the habitat preferences and life history traits of aliens, affecting their interactions with resident species. Our results together with previous studies suggest that the eastern Mediterranean rocky shores are more susceptible to the establishment of Lessepsian species, many of which may induce strong pressure on recipient communities as ecosystems engineers and competitors of native species.

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“…The species Pirenella conica is a small Potamidid gastropod (common shell length 2.3 mm) with an interesting ecology. It occupies littoral to upper littoral zones within euryhaline marine lagoons and mangrove estuaries (Taraschewski and Paperna, 1981;Zuschin and Ebner, 2015). Modern observations demonstrate this species can occur with high abundance in the low intertidal in modern Red Sea habitats, with their shell valves deposited in the upper tidal zone via low energy wave action (Zushin and Ebner, 2015a, b).…”

Section: Case Study One: Wp-sm72 Wathaynmentioning

confidence: 99%

Beyond consumption and discard: A comparative sedimentological analysis of two shell deposits from Albatross Bay, Australia, and the Farasan Islands, Saudi Arabia

Allely¹,

Holdaway

Fanning

et al. 2021

Quaternary International

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Actuopaleontological characterization and molluscan biodiversity of a protected tidal flat and shallow subtidal at the northern Red Sea

Cited by 13 publications

References 39 publications

Pleistocene sea‐floor fibrous crusts and spherulites in the Danakil Depression (Afar, Ethiopia)

Pleistocene sea‐floor fibrous crusts and spherulites in the Danakil Depression (Afar, Ethiopia)

What guides invasion success? Ecological correlates of arrival, establishment and spread of Red Sea bivalves in the Mediterranean Sea

Beyond consumption and discard: A comparative sedimentological analysis of two shell deposits from Albatross Bay, Australia, and the Farasan Islands, Saudi Arabia

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