Zooplâncton da área costeira o Porto do Recife.

Paranaguá, Maryse Nogueira; Gusmão, Lúcia Maria de Oliveira; Vieira, Dilma Aguiar do Nascimento; Neumann‐Leitão, Sigrid

doi:10.5914/tropocean.v21i1.2640

Cited by 1 publication

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“…PR is inserted in a semi-closed basin, influenced by the coastal dynamics and bounded by a reef line that runs parallel to the littoral (Fig 1) [88]. This reef is a physical barrier capable of constraining the local water turnover ratio, limiting the flow of planktonic organisms outwards the port basin [89]. Additionally, currents as the NBC and NBUC flow along the external shelf of the region, isolating PR from the ocean circulation.…”

Section: Port Of Recifementioning

confidence: 99%

Genetic diversity and connectivity of Flaccisagitta enflata (Chaetognatha: Sagittidae) in the tropical Atlantic ocean (northeastern Brazil)

Melo¹,

Lira²,

Moreira³

et al. 2020

PLoS ONE

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The phylogeography of the holoplanktonic chaetognath Flaccisagitta enflata was investigated in the Tropical Western Atlantic (TWA). Considering the cosmopolitan range of this species and the fact that its entire life cycle is planktonic, the central hypothesis of this study is that F. enflata exhibits connectivity due to its high dispersal capacity, forming a panmictic population among the study sites. The evaluated areas included neritic (Port of Recife-PR, and Tamandaré-TA) and oceanic (Fernando de Noronha Archipelago-FN, Rocas Atoll-RA, Guará seamount-GS and Saint Peter and Saint Paul's Archipelago-SPSPA) locations of the Brazilian Blue Amazon. We used COI gene sequences as molecular marker. Partial sequences (425 bp) were obtained for 116 specimens and employed to reconstruct the phylogeny, build an haplotype network, evaluate gene flow through a migration model, and estimate diversity indices, population structuring and demographic history. High levels of haplotype diversity (mean: 0.98) and moderate to high levels of nucleotide diversity (mean: 0.023) were observed. The phylogeny and the haplotype network topologies showed some geographic clustering, indicating local structuring in GS and PR. This finding was supported by the AMOVA high global Φst (0.033, significant) and some pairwise Φst comparisons (7 out of 15 were significantly >0). Significant differences suggested lower levels of connectivity when GS population was compared to those of FN and SPSPA; as well as when TA was compared to FN. These results might be related to particularities of the oceanic dynamics which rules the TWA, sustaining such dissimilarities. Structuring was also observed between PR and all oceanic locations. We hypothesize that the topography of the port inlet, enclosured by a reef barrier, may constrain the water turnover ratio and thus migration rates of F. enflata in the TWA. Accordingly, Migrate-N yielded a four

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Section: Port Of Recifementioning

confidence: 99%