Spatial distribution of butyltins and imposex in eastern Brazilian Amazon

Ribeiro-Brasil, Danielle Regina Gomes; Castro, Ítalo Braga; Petracco, Marcelo; Batista, Rodrigo Moço; Brasil, Leandro Schlemmer; Ferreira, Johnata Azevedo; Borba, Thaís Angélica da Costa; Rollnic, Marcelo; Fillmann, Gilberto; Amado, Lílian Lund

doi:10.1016/j.marpolbul.2021.112155

Cited by 10 publications

(2 citation statements)

References 27 publications

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“…Imposex involves the development of male reproductive organs in female gastropods (particularly those from the Muricidae family), indicating a disruption in normal reproductive processes [90]. Srut et al (2023) reported that genome-wide DNA demethylation related to exposure to tributyltin (TBT) is associated with a higher incidence of imposex in the banded murex, Hexaplex trunculus (Linnaeus, 1758) [91].…”

Section: Dna Methylation Is An Important Player In Reproduction Growt...mentioning

confidence: 99%

DNA Methylation Machinery in Gastropod Mollusks

Haidar,

Georgescu,

Drăghici

et al. 2024

Life

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The role of DNA methylation in mollusks is just beginning to be understood. This review synthesizes current knowledge on this potent molecular hallmark of epigenetic control in gastropods—the largest class of mollusks and ubiquitous inhabitants of diverse habitats. Their DNA methylation machinery shows a high degree of conservation in CG maintenance methylation mechanisms, driven mainly by DNMT1 homologues, and the presence of MBD2 and MBD2/3 proteins as DNA methylation readers. The mosaic-like DNA methylation landscape occurs mainly in a CG context and is primarily confined to gene bodies and housekeeping genes. DNA methylation emerges as a critical regulator of reproduction, development, and adaptation, with tissue-specific patterns being observed in gonadal structures. Its dynamics also serve as an important regulatory mechanism underlying learning and memory processes. DNA methylation can be affected by various environmental stimuli, including as pathogens and abiotic stresses, potentially impacting phenotypic variation and population diversity. Overall, the features of DNA methylation in gastropods are complex, being an essential part of their epigenome. However, comprehensive studies integrating developmental stages, tissues, and environmental conditions, functional annotation of methylated regions, and integrated genomic-epigenomic analyses are lacking. Addressing these knowledge gaps will advance our understanding of gastropod biology, ecology, and evolution.

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Section: Dna Methylation Is An Important Player In Reproduction Growt...mentioning

confidence: 99%

DNA Methylation Machinery in Gastropod Mollusks

Haidar,

Georgescu,

Drăghici

et al. 2024

Life

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“…The Amazon region has been undergoing rapid economic and urban growth in recent decades (Becker, 2005), and despite its singular environmental characteristics and high economic and ecological importance, anthropogenic impacts on the benthic fauna have been poorly studied (Paula et al ., 2007; Morais et al ., 2020; Pinto et al ., 2020; Ribeiro-Brasil et al ., 2021), and studies that evaluate the effect of recreational activities on Amazonian sandy beaches are even more scarce (Santos et al ., 2021 a ). In this context, the present study evaluated, for the first time, the impact of recreational activities on macrobenthic fauna structure and composition of three Amazonian sandy beaches with different levels of recreational activity intensity (high, intermediate and low), before, during and after a period with high tourist occupancy (July – scholar vacation).…”

Section: Introductionmentioning

confidence: 99%

Effects of vehicle traffic and trampling on the macrobenthic community of Amazonian macrotidal sandy beaches

2022

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We report for the first time the effects of vehicle traffic and beachgoer trampling on macrobenthic communities of Amazonian sandy beaches. Sampling was performed during four consecutive months with different beach use intensity in 2017 (before, during vacation, and two months after the vacation period) on three contrasting beaches with regard to disturbance (Urban: Atalaia; Intermediate: Farol-Velho; and Protected: Corvinas) in the intertidal zone along two equidistant transects at seven equidistant sampling stations from the high-tide water mark to the swash zone. At each sampling station, four biological and sediment samples were randomly collected. Also, in each station, the sediment compaction was determined using a manual penetrometer. Physical sediment variables remained constant over time in all beaches, whereas differences were found in sediment compaction over the months. Macrobenthic community differences in density and richness among months were observed at Atalaia and Farol-Velho beaches. In contrast, Corvinas beach remained constant throughout the study period. Furthermore, the vulnerability of the polychaetes Thoracophellia papillata, Scolelepis squamata and Paraonis sp. indicates that they might be potential indicators of recreational activity impact.

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