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| Souza,Shayanna M. A. da R.; Matthews-Cascon,Helena; Couto,Erminda da C. G.. |
| ABSTRACT We investigated the spatial variation of molluscan assemblages with different habitat-forming species and bare rock habitat in a rocky intertidal zone in northeastern Brazil. The high intertidal zone substrate was covered predominantly of barnacles [Chthamalus bisinuatus (Pilsbry, 1916)], the mid-intertidal of mussels [Brachidontes exustus (Linnaeus, 1758)] and the low intertidal of macroalgae chlorophytes [Gayralia oxysperma (Kützing) K. L. Vinogradova ex Scagel et al., 1989 and Ulva lactuca Linnaeus, 1753], phaeophytes [Sargassum vulgare C. Agardh] and rhodophytes [Palisada flagellifera (J.Agardh) K. W. Nam, 2007]. A total of 3,861 mollusks were recorded, belonging to the classes Gastropoda (9 species; 3,800 individuals), Bivalvia (3 spp.; 54... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trophic groups; Benthic ecology; Ecosystem engineers; Biological substrate; Southwestern Atlantic. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100227 |
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| Cuvelier, Daphne; De Busserolles, Fanny; Lavaud, Romain; Floc'H, Estelle; Fabri, Marie-claire; Sarradin, Pierre-marie; Sarrazin, Jozee. |
| In the past few decades, hydrothermal vent research has progressed immensely, resulting in higher-quality samples and long-term studies. With time, scientists are becoming more aware of the impacts of sampling on the faunal communities and are looking for less invasive ways to investigate the vent ecosystems. In this perspective, imagery analysis plays a very important role. With this study, we test which factors can be quantitatively and accurately assessed based on imagery, through comparison with faunal sampling. Twelve instrumented chains were deployed on the Atlantic Eiffel Tower hydrothermal edifice and the corresponding study sites were subsequently sampled. Discrete, quantitative samples were compared to the imagery recorded during the experiment.... |
| Tipo: Text |
Palavras-chave: Hydrothermal vents; Image analyses; Deep ocean; Taxonomic diversity; Mid-Atlantic Ridge; Data processing; Benthic ecology. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00117/22868/21643.pdf |
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| Brandt, Miriam; Trouche, Blandine; Henry, Nicolas; Liautard-haag, Cathy; Maignien, Lois; De Vargas, Colomban; Wincker, Patrick; Poulain, Julie; Zeppilli, Daniela; Arnaud-haond, Sophie. |
| The abyssal seafloor covers more than 50% of planet Earth and is a large reservoir of still mostly undescribed biodiversity. It is increasingly targeted by resource-extraction industries and yet is drastically understudied. In such remote and hard-to-access ecosystems, environmental DNA (eDNA) metabarcoding is a useful and efficient tool for studying biodiversity and implementing environmental impact assessments. Yet, eDNA analysis outcomes may be biased toward describing past rather than present communities as sediments contain both contemporary and ancient DNA. Using commercially available kits, we investigated the impacts of five molecular processing methods on eDNA metabarcoding biodiversity inventories targeting prokaryotes (16S), unicellular... |
| Tipo: Text |
Palavras-chave: Environmental metabarcoding; RNA versus DNA; Extracellular DNA; Deep-sea biodiversity; Benthic ecology; Biomonitoring; Method testing. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00630/74165/73774.pdf |
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| Varotto,Ricardo Silva; Barreto,Cristine Costa. |
| The colonization pattern of wooden panels by teredinid larvae released from a previously infested focus was investigated. Panels were placed at different distances (1, 10, 20m) and in different directions from the focus. The colonization experiment took place at Parcel do Aleijado, Ilha Grande Bay, RJ. The focus remained immersed in nearly surface water, by the coast, during three months for infestation by teredinids. After this period, it was transferred to the study site. The infested focus and colonization panels remained in water, 10m deep, for three months more. Total density and density of the dominant species were considered for each group of panels. Five teredinid species were found: Bankia fimbriatula, Bankia gouldi, Lyrodus floridanus, Lyrodus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teredinidae; Colonization; Benthic ecology; Dispersion. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000400002 |
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