New records and range extensions of azooxanthellate scleractinians (Cnidaria: Anthozoa) from Brazil

Cordeiro, Ralf T. S.; Kitahara, Marcelo V.; Amaral, Fernanda Duarte

doi:10.1017/s175526721200019x

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…Finally, we have noticed the occurrence, on both sides of the SAO, of reefs at even greater depths (>150 m depth), reaching below the mesophotic zone. These deeper formations have also received little scientific attention (Soares, Lotufo, et al., ) and are probably distinct and ecologically apart from the shallow and mesophotic ecosystems (Hovland, 2008), being formed by ecosystem engineers, such as corals Lophelia pertusa , Madrepora oculata and Solenosmilia variabilis (Cordeiro, Kitahara, & Amaral, ; Kitahara, ). It is outside the scope of this study to discuss these deeper marine animal forests; however, a review of their distribution and conservation status is urgently needed, since they are also vulnerable to human pressures, such as those caused by the fishing industry (Kitahara, ; Soares, Lotufo, et al., ).…”

Section: South Atlantic Mesophotic Ecosystemsmentioning

confidence: 99%

Mesophotic ecosystems: Distribution, impacts and conservation in the South Atlantic

Soares

Tavares

Carneiro

2018

Diversity and Distributions

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Aim: This study reviews recent research on the South Atlantic Mesophotic ecosystems (MEs) and the pressures threatening them, and offers suggestions for their management and conservation. Location:The South Atlantic Ocean. Methods:A comprehensive compilation of the scientific literature was performed to examine the distribution, human impacts and conservation status of the South Atlantic MEs. Results: Our review indicated that the South Atlantic Ocean (SAO) is one of the majorMEs areas in the world's oceans. The South Atlantic MEs are composed of a mosaic of distinct seascapes, mainly rhodolith beds, mesophotic reefs (i.e., rocky and biogenic) and marine animal forests (e.g., sponge aggregations, octocoral and black coral forests) that occur along the East South American and West African coasts, seamounts and oceanic islands. Throughout the SAO, the distinct seascapes of MEs are usually formed on the middle and outer continental shelves, shelf-edge, seamounts, submarine canyons, incised valleys and paleochannels, reef structures and insular shelves. We highlighted sea temperature anomalies, ocean acidification, extreme floods and droughts, fisheries, invasive species, marine debris, mining, and oil and gas exploitation as major threats to these ecosystems. Main conclusions:Given the threats to the South Atlantic MEs, growing human pressures may degrade these ecosystems in the next years and undermine their unique biodiversity as well as their potential to provide connectivity between regions and depths. Our review revealed the existence of some extensive and unprotected formations, which urgently demand in-depth investigations and conservation action. K E Y W O R D S climate change, coral reef, deep-sea refugia, marine biogeography, marine conservation, rhodolith bed 1 | INTRODUC TI ON Developments in the marine sciences, especially in terms of methodology and equipment, have allowed the exploration of progressively deeper oceanic zones, providing a more detailed picture of the hidden biodiversity in mesophotic ecosystems (MEs; Loya, Eyal, Treibitz, Lesser, & Appeldoorn, 2016). These ecosystems are characterized by the presence of light-dependent corals and associated species (e.g.,

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Section: South Atlantic Mesophotic Ecosystemsmentioning

confidence: 99%

Mesophotic ecosystems: Distribution, impacts and conservation in the South Atlantic

Soares

Tavares

Carneiro

2018

Diversity and Distributions

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“…However, there are fewer studies that have focused on deep-sea corals in the Southern Hemisphere compared to those in the Northern Hemisphere. Although studies have been conducted on the Brazilian coast (Viana et al, 1998;Le Goff-Vitry et al, 2004;Pires et al, 2004;Sumida et al, 2004;Castro et al, 2006;Kitahara, 2007;Pires, 2007;Arantes et al, 2009;Kitahara et al, 2009;Cordeiro et al, 2012;Bahr et al, 2020), most have focused on specific taxa or on a compilation of azooxanthellate stony corals, and no studies have focused on maintaining deep-sea corals in the laboratory and subsequent experimentation.…”

Section: Introductionmentioning

confidence: 99%

Deep-sea coral Lophelia pertusa laboratory maintenance and exposure to barite using water recirculation systems

Rocha¹,

Reis²,

Silva³

et al. 2021

J. Toxicol. Environ. Health Sci.

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Drilling activities usually discharge large quantities of fluids and drill cuttings, which are composed of fine particles, such as barite, that can physically affect Lophelia pertusa. An experiment to assess the effects of barite smothering on L. pertusa was conducted with a water recirculation system. The corals were collected in Santos Basin, Brazil. The experiment was conducted in 23 L cone-shaped aquaria, adapted with an individual water recirculation system. Each exposure to suspended barite particles (50 and 100 mg•L -1 ) plus a control group was maintained in triplicate. Three nubbins were accommodated in the aquaria and acclimated for 7 days. The experimental design simulated two cycles of discharge, followed by a recovery cycle of 7 days each, totaling 35 days. Nine polyps per treatment were monitored twice per day regarding their behavior levels. Time-lapse photographs were also taken during the recovery periods. Total polyp survival in the control was 100%, while those in the 50 and 100 mg•L -1 groups were 94.2 and 93.6%, respectively, with no significant difference between treatments. Polyp activity was different between treatments, with both exposed aquaria displaying higher activity than control. This was probably related to the natural cleaning behavior of L. pertusa.

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Brazilian Deep-Sea Corals

Kitahara

Cordeiro

Barbosa

et al. 2020

Brazilian Marine Biodiversity

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New records and range extensions of azooxanthellate scleractinians (Cnidaria: Anthozoa) from Brazil

Cited by 9 publications

References 14 publications

Mesophotic ecosystems: Distribution, impacts and conservation in the South Atlantic

Mesophotic ecosystems: Distribution, impacts and conservation in the South Atlantic

Deep-sea coral Lophelia pertusa laboratory maintenance and exposure to barite using water recirculation systems

Brazilian Deep-Sea Corals

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