Abstract On coral reefs, some of the most aggressive calcium carbonate eroders are dinoflagellate-hosting sponges genus Cliona . Like in other marine taxa, influence these symbiotic microorganisms on metabolism host sponge, and thereby erosion surrounding ecosystem, is increasingly acknowledged. Despite elevating pH (and hence saturation state), dinoflagellate photosynthesis promotes bioerosion...

Abstract Breakdown of skeletal and lithic hard substrates by organisms, a process referred to as bioerosion, is part the global carbon cycle receives increased attention, but little known about bioerosion in polar environments. Here, we study traces (addressed their respective ichnotaxa) recorded barnacle Bathylasma corolliforme from Ross Sea, Antarctica. Traces were visualized via scanning ele...

The genesis and distribution of marine notches around the microtidal Mediterranean basin has been widely debated in recent years. Here we provide new climate geomorphological insights into factors controlling notch formation based on bathymetric found Marseille Bay (NW Mediterranean). In this area, exist (i) either near present Mean Sea Level (MSL); or (ii) at ∼35 cm below MSL, but with no high...

Bioerosion, resulting from microbioerosion or biogenic dissolution, macrobioerosion and grazing, is one the main processes involved in reef carbonate budget functioning. On healthy reefs, most of produced carbonates are preserved accumulate. But context global change, reefs increasingly degraded as environmental factors such ocean warming acidification affect negatively accretion positively bio...

Experiments have demonstrated that ocean acidification (OA) conditions projected to occur by the end of the century will slow the calcification of numerous coral species and accelerate the biological erosion of reef habitats (bioerosion). Microborers, which bore holes less than 100 μm diameter, are one of the most pervasive agents of bioerosion and are present throughout all calcium carbonate s...

Coral reefs are increasingly in jeopardy due to global changes affecting both reef accretion and bioerosion processes. Bioerosion processes dynamics dead carbonates under various environmental conditions relatively well understood but only over a short-term limiting projections of coral evolution by 2100. It is thus essential monitor understand the long term. Here we studied assemblage traces m...