Soft-bottom polychaetes from the Brazilian harbors of Mucuripe and Pecém (state of Ceará) and Santos (state of São Paulo)

Context The polychaetes are the major benthos in the soft bottom of the eutrophic Eastern Harbour of Alexandria, Egypt. Aim Investigate the quantitative and qualitative dynamics of polychaete community in the Harbour. Methods Polychaetes were collected bimonthly from August 2018 to June 2019, by using a 29- × 16-cm grab. Key results In total, 54 polychaete species were identified, belonging to 27 families and 51 genera. The family Syllidae was represented by eight species, Spionidae by five species, and Cirratulidae by five species, against one to three species from all other families. Eleven alien species were recorded, including four new to the Mediterranean Sea (Caulleriella cristata, Armandia casuarina, Spio blakei and Prionospio lighti). The polychaete community displayed pronounced temporal variations in both species diversity and numerical abundance at the two sampled sites. Conclusion This study showed high diversity and abundance of polychaetes in such eutrophic basin. Implications The eutrophication may play a role in the structure and count of polychaetes in the Eastern Harbour.

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Natural factors and chemical contamination control the structure of macrobenthic communities in the Santos Estuarine System (SP, Brazil)

Abessa

Rachid²,

Zaroni³

et al. 2019

Community Ecology

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The Santos Estuarine System (SES) is a complex of bays, islands, estuarine channels, and rivers located on the Southeast coast of Brazil, in which multiple contaminant sources are situated in close proximity to mangroves and other protected areas. In this study, the composition and structure of the macrobenthic communities of SES were described and ninetynine species were identified, with the predominance of polychaetes and bivalve mollusks. The benthic assemblages also showed strong signs of stress, as indicated by the low abundance, richness and diversity, and the dominance of opportunistic species. Integrated analysis including sediment characteristics related to natural and anthropogenic factors (e.g., sediment chemistry, and toxicity) indicated that benthic fauna from the inner portions of the SES and vicinities of the SSOS diffusers as Santos Bay were affected. Some locations at the mouths of Santos and Sao Vicente estuaries exhibited moderate disturbance. In other sites from the mouth of São Vicente and Bertioga channels, and Santos Bay, the benthic fauna were considered not degraded. Our results suggest that a combination of both environmental factors and contaminants were responsible for the benthic community structure.

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Soft-bottom polychaetes from the Brazilian harbors of Mucuripe and Pecém (state of Ceará) and Santos (state of São Paulo)

Cited by 3 publications

References 20 publications

Metagenomic analysis of sediments under seaports influence in the Equatorial Atlantic Ocean

Metagenomic analysis of sediments under seaports influence in the Equatorial Atlantic Ocean

Soft-bottom polychaetes in a chronic eutrophic bay on the coast of Alexandria

Natural factors and chemical contamination control the structure of macrobenthic communities in the Santos Estuarine System (SP, Brazil)

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