Shell mineralogy and chemistry – Arctic bivalves in a global context

Iglikowska, Anna; Przytarska, Joanna; Humphreys‐Williams, Emma; Najorka, Jens; Chełchowski, Maciej; Sowa, A.; Hop, Haakon; Włodarska‐Kowalczuk, Maria; Kukliński, Piotr

doi:10.1016/j.marpolbul.2023.114759

Cited by 5 publications

(1 citation statement)

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“…Shells with a higher calcite content are typically more robust and less soluble [ 64 ], which could potentially explain the lower growth and decalcification rates observed in the temperate Penetrantia sp. However, bivalve shells from the Arctic Ocean were recently discovered to be primarily composed of aragonite, contradicting the previously observed latitudinal gradient [ 66 ]. Additionally, the bivalve shell was already deceased and more porous than the live tropical gastropod shell, which should have increased the growth rates of Penetrantia sp.…”

Section: Discussionmentioning

confidence: 94%

Boring life: early colony formation and growth in the endolithic bryozoan genus Penetrantia Silén, 1946

Decker,

Lemer,

Decker

et al. 2024

Zoological Lett

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As in most colonial and sessile marine invertebrates, bryozoan life history is characterized by asexual propagation of zooids for colonial growth and by sexual production of larvae for dispersal. However, comprehensive life histories, particularly in cryptic species such as endolithic (boring) bryozoans, remain poorly understood. The ctenostome family Penetrantiidae is widespread from temperate to tropical waters and often found in molluscan shells, offering an opportunity to study the boring lifestyle and its potential impact on bioerosion through growth and settlement experiments. Our research focused on Penetrantia clionoides from Guam in the Pacific Ocean, Penetrantia japonica from Japan, and a Penetrantia species from France in the Atlantic Ocean. We found distinct life histories and reproductive patterns potentially influenced by environmental factors such as temperature and food availability. The tropical P. clionoides displayed higher rates of larval production and growth compared to its temperate counterpart. For instance, the mean stolon extension was 335.2 μm/week in P. clionoides versus 232.1 μm/week in Penetrantia sp. Autozooid development took 13 days in P. clionoides and 31 days in Penetrantia sp. Anatomical features like apertural rims aided in species identification and in understanding larval settlement preferences, suggesting a tendency for philopatric settlement behavior. The bioerosional impact of penetrantiids remains little understood, but we generated first projections of bioerosion rates and a protocol for keeping Penetrantia under laboratory conditions, laying a foundation for further research in this field.

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Section: Discussionmentioning

confidence: 94%