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| PEREIRA,NATAN S.; MANSO,VALDIR A.V.; MACEDO,RENÊ J.A.; DIAS,JOÃO M.A.; SILVA,ADRIANA M.C.. |
| Located 266 km offshore Brazilian coast, Rocas Reef complex is the only atoll in the South Atlantic. Two scientific expeditions carried out detailed sedimentological studies of the complex. Sand texture was dominant in the sedimentary environment, although other textures such as gravel, sandy gravel and gravelly sand, were also observed. Mean size ranged from fine sand to coarse sand (-1.23 to 2.34ø), with an average value of 0.69ø (sand fraction), which from a geological perspective represents a high-energy environment. The values of mean size varied in the different geomorphologic compartments, a response to variable hydrodynamics on the reef. Sorting ranged from very well sorted to poorly sorted, with a mean value of 0.97ø (moderately sorted). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogenic particles; Carbonate sediments; Atoll reef; Sedimentological parameters. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100057 |
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| PINHEIRO,BARBARA R.; PEREIRA,NATAN S.; AGOSTINHO,PAULA G.F.; MONTES,MANUEL J.F.. |
| ABSTRACT Coral reefs are one of the most vulnerable ecosystems to ocean warming and acidification, and it is important to determine the role of reef building species in this environment in order to obtain insight into their susceptibility to expected impacts of global changes. Aspects of the life history of a coral population, such as reproduction, growth and size-frequency can contribute to the production of models that are used to estimate impacts and potential recovery of the population, acting as a powerful tool for the conservation and management of those ecosystems. Here, we present the first evidence of Siderastrea stellata planulation, its early growth, population size-frequency distribution and growth rate of adult colonies in Rocas Atoll. Our... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climate change; Coral reefs; Rocas Atoll; Siderastrea stellata; South Atlantic Ocean. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300873 |
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