Monitoring of ichthyoplanktonic community at the Doce River mouth and adjacent marine region in Southeast Brazil after Fundão dam collapse

Bonecker, Ana Cristina Teixeira; Castro, Márcia Salustiano de; Dias, Cristina de Oliveira; Sá, Fabian; Mill, Guilherme Nogueira; Ghisolfi, Renato David; Bonecker, Sérgio Luiz Costa

doi:10.1016/j.seares.2022.102284

Cited by 2 publications

(1 citation statement)

References 49 publications

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“…far. Plankton and benthic communities were altered due to dissolved and particulate iron ore tailings input (Bonecker et al, 2022;Nascimento et al, 2022;Rocha et al, 2022), levels of toxicity in fish were high during the first years until a better condition was reached (Bevitoŕio et al, 2022), and water and sediment quality were found to be as highly contaminated during the first 3 to 4 years and after that (Orlando et al, 2020;Quaresma et al, 2021), a variation on the environmental quality status is influenced by prevailing seasonal hydrological and meteo-oceanographic conditions (Longhini et al, 2022).…”

Section: Benthic Habitat Mapping Guidance For Marine Management and C...mentioning

confidence: 99%

The role of benthic habitat mapping for science and managers: A multi-design approach in the Southeast Brazilian Shelf after a major man-induced disaster

Menandro

Lavagnino²,

Vieira³

et al. 2022

Front. Mar. Sci.

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Seabed mapping is currently the baseline information for ocean management and conservation, and is an indispensable item within research and Marine Spatial Planning. Here, we use a case study and published data along the southeast Brazilian continental shelf to illustrate the concepts and ideas of potential benthic habitat mapping and the importance of having maps on different scales and the potential for using a multi-design approach. The case analysis presented here uses a regional map and distinct criteria (seabed geodiversity and biodiversity, and potential influence of a tailings plume) to define three areas along the continental shelf to be mapped in a high-resolution, as part of a marine monitoring program. The background of the case study is a tailing dam failure disaster that led to the input of iron ore tailings in the ocean, leading to a major environmental disaster. Three areas were chosen, including: a Marine Protected Area (MPA Costa das Algas), a major fishing ground (the Doce River prodelta/depocenter), and an understudied reef area (Forgotten Reefs). Potential benthic habitat mapping was carried out using acoustic surveys (multibeam echosounder acquiring bathymetry and backscatter) and ground-truthing (sediment samples and seafloor image). Results detailed the potential habitats throughout the three areas, providing primary information for the study of benthic habitats and their distribution. The multi-design approach indicated that although a regional analysis can indicate potential vulnerability as a first assessment approach, high-resolution potential habitat mapping (herein, 20 m or finer) is beneficial to evaluate and produce a higher-confidence level for decision-makers. Having an overall view of what and where to collect new and finer data would be best to identify vulnerable areas that, in this case study, could be threatened by plume dispersion and tailings accumulation. Our results support the delineation of priority areas aiming for monitoring, protection and guiding for other studies, besides the consolidation of habitat importance and the integration of various datasets through a hierarchical classification scheme. Although Brazil has never produced a regional or national habitat map for the entire continental margin, there are already conditions to plan, execute and maintain a habitat mapping program, partnering with Universities, Government Institutions (e.g., the Brazilian Navy), and the private sector. In the context of the UN Decade of Ocean Science targets, it is urgent to plan and implement a national database capable of supporting a habitat classification effort on a broader national scale, with the flexibility to support a multi-design or a multi-scale approach.

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Section: Benthic Habitat Mapping Guidance For Marine Management and C...mentioning

confidence: 99%

The role of benthic habitat mapping for science and managers: A multi-design approach in the Southeast Brazilian Shelf after a major man-induced disaster

Menandro

Lavagnino²,

Vieira³

et al. 2022

Front. Mar. Sci.

View full text Add to dashboard Cite

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Organic Matter Changes at the Doce River Mouth Caused by the Fundão Dam Mine Tailing Collapse

Resende

Pereira

Bernardino

et al. 2023

Water Air Soil Pollut

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Monitoring of ichthyoplanktonic community at the Doce River mouth and adjacent marine region in Southeast Brazil after Fundão dam collapse

Cited by 2 publications

References 49 publications

The role of benthic habitat mapping for science and managers: A multi-design approach in the Southeast Brazilian Shelf after a major man-induced disaster

The role of benthic habitat mapping for science and managers: A multi-design approach in the Southeast Brazilian Shelf after a major man-induced disaster

Organic Matter Changes at the Doce River Mouth Caused by the Fundão Dam Mine Tailing Collapse

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