Dear MarMamers, My coauthors and I are delighted to share our latest publication "*The legacy and future of multiple anthropogenic stressors: organohalogen compounds in the vulnerable Guiana dolphin (Sotalia guianensis)" * in *Journal of Hazardous Materials*. In this study, we investigated temporal trends in the bioaccumulation of persistent organic pollutants (POPs) and natural organobromine compounds (MeO-BDEs) in a population of vulnerable Guiana dolphins (*Sotalia guianensis*). Our work highlights how these contaminants responded to the largest environmental disaster in the Southeastern Atlantic and to their subsequent remobilization driven by global change and other anthropogenic pressures. *You can find the article here:* Link for our research paper in HazMat! <https://kwnsfk27.r.eu-west-1.awstrack.me/L0/https:%2F%2Fauthors.elsevier.com%2Fa%2F1lnTm15DSlZLeO/1/01020199532b7f7b-e816076c-8959-4596-9925-0c2224fd4e51-000000/SA6fFCEX0WRyv_xfRSkfh4P7Y5o=444> *Abstract:* Chemical pollution is one of the main threats to cetaceans, such as the coastal Guiana dolphin (*Sotalia guianensis*), a vulnerable species exposed to multiple anthropogenic stressors. Events related to climate change may exacerbate pollution, adding complexity to an already concerning scenario. This study aimed to assess the levels of both anthropogenic and biosynthesized organohalogens (PCBs, DDTs, HCB, HCHs, mirex, PBDEs, PBEB, HBB, and the natural MeO-BDEs) in the blubber of 73 Guiana dolphins from Southeastern Brazil, using gas chromatography coupled with mass spectrometry, and investigate their accumulation trends between 2009 and 2024. PCB concentrations ranged from 0.067 to 241 µg.g−1, DDTs from 0.023 to 651 µg.g−1, Mirex from < 0.003–97 µg.g−1, HCB from < 0.002–1.9 µg.g−1, HCHs from < 0.004–0.13 µg.g−1, PBDEs < 0.0002–3.4 µg.g−1, PBEB from < 0.0004–0.086 µg.g−1, and MeO-BDEs from 0.5 to 184.3 µg.g−1. Bioaccumulation of organochlorine pesticides and PCBs increased after the collapse of Fundão mining dam in 2015, peaking again after 2019 post extreme meteorological events. MeO-BDEs decreased from 2009 to 2020 and then increase, which was associated with alterations in the Abrolhos Bank community. Long-term monitoring of sentinel species, such as cetaceans, contributes to understanding the impacts of climate change in tropical environments and can help guide conservation policies. We welcome any thoughts and questions! *Warm regards,* -- *Profa. Dra. Nara de Oliveira-Ferreira* _____________________________________________________________ *Laboratório de Mamíferos Aquáticos e Bioindicadores (MAQUA -UERJ)* Mestre em Ecologia e Evolução - Universidade do Estado do Rio de Janeiro Doutora em Biofísica - Universidade Federal do Rio de Janeiro Contato: + 55 21 98585.9916