Macroborings, their tracemakers and nestlers in clasts of a fan delta: the Savignone Conglomerate (Lower Oligocene), Northern Apennines, Italy

Uchman, Alfred; Kleemann, Karl; Rattazzi, Bruno

doi:10.1127/njgpa/2017/0625

Cited by 14 publications

(13 citation statements)

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“…However, the composition of macroborer organisms, dominance and boring patterns differed between corals and CCA, with serpulids and bryozoans being the primary bioeroding groups colonizing dead coral blocks (Davis and Hutchings 1983). The presence of sponges and bivalves is evidence of a multiphase and prolonged colonization (Uchman et al 2017), because these organisms require more than four years to penetrate a substrate (Tribollet 2010). Corals with advanced degrees of bioerosion are characterized by the dominance of sponges in the substrate, which replace short-lived bioeroder groups such as polychaetes (Davies and Hutchings 1983;Hutchings 2008).…”

Section: Taxonomic Composition and Abundance Of Macroboring Organisms...mentioning

confidence: 99%

Bioerosion of reef-building crustose coralline algae by endolithic invertebrates in an upwelling-influenced reef

2021

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Coral reef growth is primarily determined by constructive and bioerosive processes acting on key reef-building organisms. Among them, corals are major contributors to the construction of reef frameworks, while crustose coralline algae (CCA) primarily take part in reef cementation. Despite the significance of CCA for reef ecology and functioning, there is very little information on CCA bioerosion rates, in particular in reefs influenced by coastal upwelling. Therefore, the aim of this study was to examine the percentage and rates of internal bioerosion by macroborer invertebrates in two dominant CCA species and to explore whether the oceanographic variability influences the nature of bioerosion in coral reefs of the Tayrona Natural National Park (Colombian Caribbean). Annual rates of gross calcium carbonate production for Lithoplyllum cf. kaiseri and Porolithon antillarum were 0.556 (±0.38) and 0.883 (± 1.0) g CaCO3 cm -2 year -1 respectively, and estimates of percent area covered by macroborer boreholes showed values of 29.7 % for L. kaiseri and 18.0 % for P. antillarum. Rates of calcium carbonate removal by internal macroborers in L. kaiseri (0.19 ± 0.17 g CaCO3 cm -2 year -1 ) were higher than those in P. antillarum (0.14 ± 0.17 g CaCO3 cm -2 year -1 ). The percentage of internal bioerosion did not vary significantly across climatic/oceanographic seasons. Boreholes produced by mollusks, polychaetes, sponges and sipunculids were identified, with mollusks having the highest erosion activity. A total of 2,095 individuals of boring and opportunistic organisms were identified and grouped into 29 families (17 polychaetes, 4 mollusks, 2 sipunculids and 6 crustaceans). The composition of the macroborer invertebrate community also varied between CCA species, with higher boreholes attributed to vermetids in L. kaiseri than in P. antillarum. Although 3 there is no clear influence of climatic seasons on internal bioerosion, the high rates of CCA bioerosion may reduce reef consolidation in the region.

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Section: Taxonomic Composition and Abundance Of Macroboring Organisms...mentioning

confidence: 99%

Bioerosion of reef-building crustose coralline algae by endolithic invertebrates in an upwelling-influenced reef

2021

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“…Remarks: Renichnus was formed as the etching trace of vermetid gastropods (Mayoral, 1987;Uchman et al, 2017).…”

Section: Systematic Paleoichnologymentioning

confidence: 99%

Bioerosional structures from the Late Pleistocene coral reef, Red Sea coast, northwest Saudi Arabia

Demírcan¹,

El‐Sorogy²,

Alharbi³

2021

Turkish J Earth Sci

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Herein, 20 ichnospecies belonging to 8 ichnogenera were identified in bivalves, gastropods, and corals (n = 701) from the Late Pleistocene coral reef along the Red Sea coast, northwest Saudi Arabia. The trace fossils were produced by clionid sponges (47.39%), endolithic bivalves (42.17%), polychaete annelids (5.42%), vermetid gastropods (3.81%), and acrothoracican barnacles (1.21%). The recognized ichnotaxa were Entobia geometrica, E. ovula, E. cf. goniodes, E. cf. retiformis, E. cretacea, Entobia isp., Gastrochaenolites torpedo, G. lapidicus, G. cf. dijugus, Gastrochaenolites isp., Oichnus paraboloides, O. simplex, Oichnus isp., Caulostrepsis taeniola, Caulostrepsis isp., Maeandropolydora cf. sulcans, Maeandropolydora isp., Renichnus isp., Centrichnus isp., and cf. Rogerella isp., Most bivalves and gastropods contain Entobia rather than Gastrochaenolites, which is commonly found in the larger and thicker corals. The content of the trace fossils indicated an Entobia ichnofacies formed in the coral reef during transgression. The habitat conditions changed gradually, from well-oxygenated, shallow, high-energy back-reef and reef crest bioeroding polychaetes and bivalves, to deep, low-energy reef slope dominated by boring sponges.

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“…Gastrochaenolites lapidicus is produced by the bivalves Lithophaga , Hiatella (Kelly and Bromley, 1984), Rocellaria ( Gastrochaena ) dubia Pennant, 1777 (Bromley and Asgaard, 1993a), and possibly by Parapholas (Uchman, Kleemann, and Rattazzi, 2017). Radwański (1964, 1965, 1969) referred such borings to Aspidopholas .…”

Section: Systematic Paleontologymentioning

confidence: 99%

“…Nevertheless, this ichnospecies is present in the quarry. Gastrochaenolites orbicularis is produced by the bivalve Jouannetia (Radwański, 1969; Kelly and Bromley, 1984; Uchman et al, 2017).…”

Section: Systematic Paleontologymentioning

confidence: 99%

Spirolites radwanskiin. igen. n. isp.: vermetid gastropod attachment etching trace from the middle Miocene rocky coast of the Paratethys, Poland

2018

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A new ichnogenus and ichnospecies, Spirolites radwanskii, is a spiral boring recognized in large limestone clasts deposited in a Miocene cliff-foot ramp. It is characterized by a semi-circular or inverted Ω-shaped cross section, gradually increasing width, gradual entrenching in the rock from the narrower side, consistent coiling direction, steep margin from the wider side, two-order annuli, and occasional truncation of the narrower side by the wider part. It is interpreted as a boring of vermetid gastropods, similar to the recent Dendropoma. Spirolites co-occurs with the bivalve borings Gastrochaenolites, mostly G. torpedo, sponge borings Entobia, and the spionid polychaete boring Caulostrepsis, which are typical of the Entobia ichnofacies. Spirolites was produced in very shallow, clean and warm sea waters.

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Macroborings, their tracemakers and nestlers in clasts of a fan delta: the Savignone Conglomerate (Lower Oligocene), Northern Apennines, Italy

Cited by 14 publications

References 0 publications

Bioerosion of reef-building crustose coralline algae by endolithic invertebrates in an upwelling-influenced reef

Bioerosion of reef-building crustose coralline algae by endolithic invertebrates in an upwelling-influenced reef

Bioerosional structures from the Late Pleistocene coral reef, Red Sea coast, northwest Saudi Arabia

Spirolites radwanskiin. igen. n. isp.: vermetid gastropod attachment etching trace from the middle Miocene rocky coast of the Paratethys, Poland

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