Embryonic Development in Marine Mollusks under Environmental Stressors
Summary
Embryonic development in marine mollusks proceeds through a series of highly regulated stages, from fertilisation and cleavage to gastrulation and the formation of the larval shell (the D-veliger stage). During these early phases, precise cellular differentiation, morphogenetic movements and biomineralisation processes establish the basic body plan and protective structures. As benthic organisms with complex life cycles, molluscan embryos and larvae are exceptionally vulnerable to fluctuations in temperature, salinity, pH and exposure to chemical pollutants. Elevated temperatures can accelerate developmental rates but often at the expense of normal morphogenesis, while hypo- or hypersaline conditions may impair osmoregulation and trigger cellular stress pathways. Emerging contaminants such as endocrine-disrupting compounds, heavy metals and hydrocarbon mixtures can interfere with key signalling cascades, disrupt shell formation and induce malformations or mortality. Understanding the mechanistic responses and thresholds of different species under combined stressors is critical for predicting population resilience, guiding aquaculture practices and informing conservation strategies in the face of accelerating climate change and coastal pollution.
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Embryonic Development in Marine Mollusks under Environmental Stressors publication trend
The graph below shows the total number of articles in embryonic development in marine mollusks under environmental stressors across all publications each year (not limited to Nature Index journals).
Technical terms
Biomineralisation: The controlled process by which molluscan embryos deposit calcium carbonate to form a protective shell.
D-veliger stage: A planktonic larval phase characterised by the presence of a two-lobed velum and an initial shell structure.
Endocrine disruptor: A chemical agent that interferes with hormone signalling pathways, potentially altering development and growth.
Water-accommodated fraction (WAF): The portion of an oil or hydrocarbon mixture that dissolves or forms fine droplets in seawater, used in toxicity testing.
References
- The biocide triclosan as a potential developmental disruptor in Mytilus early larvae. Environmental Science and Pollution Research (2023).
- Do Temporal and Spatial Parameters or Lifestyle of the Pacific Oyster Crasssostrea gigas Affect Pollutant Bioaccumulation, Offspring Development, and Tolerance to Pollutants?. Frontiers in Marine Science (2017).
- Effect of WAF crude oil exposure to larvae development of the black-scar oyster Crasosstrea iredalei. IOP Conference Series Earth and Environmental Science (2021).
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