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Bacterial and Archaeal Communities Variability Associated with Upwelling and Anthropogenic Pressures in the Protection Area of Arraial do Cabo (Cabo Frio region - RJ) Anais da ABC (AABC)
COELHO-SOUZA,SERGIO A.; ARAÚJO,FÁBIO V.; CURY,JULIANO C.; JESUS,HUGO E.; PEREIRA,GILBERTO C.; GUIMARÃES,JEAN R.D.; PEIXOTO,RAQUEL S.; DÁVILA,ALBERTO M.R.; ROSADO,ALEXANDRE S..
ABSTRACTUpwelling systems contain a high diversity of pelagic microorganisms and their composition and activity are defined by factors like temperature and nutrient concentration. Denaturing gradient gel electrophoresis (DGGE) technique was used to verify the spatial and temporal genetic variability of Bacteria and Archaea in two stations of the Arraial do Cabo coastal region, one under upwelling pressure and another under anthropogenic pressure. In addition, biotic and abiotic variables were measured in surface and deep waters from three other stations between these stations. Six samplings were done during a year and adequately represented the degrees of upwelling and anthropogenic pressures to the system. Principal Component Analysis (PCA) showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial diversity; Leucine incorporation; Flow cytometry; Temperature; Nutrients availability; Brazilian Upwelling System.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401737
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Occurrence of arbuscular mycorrhizal fungi on King George Island, South Shetland Islands, Antarctica Anais da ABC (AABC)
BARBOSA,MARISÂNGELA V.; PEREIRA,ELISMARA A.; CURY,JULIANO C.; CARNEIRO,MARCO A.C..
ABSTRACT Arbuscular mycorrhizal fungi make up an important ecological niche in ecosystems, and knowledge of their diversity in extreme environments is still incipient. The objective of this work was to evaluate the density and diversity of arbuscular mycorrhizal fungi in the soil of King George Island in the South Shetland Islands archipelago, Antarctica. For that, soil and roots of Deschampsia antarctica were collected at the brazilian research station in Antarctica. The spore density, species diversity and mycorrhizal colonization in the roots were evaluated. There was a low density of spores (27.4 ± 17.7) and root mycorrhizal colonization (6 ± 5.1%), which did not present statistical difference. Four species of arbuscular mycorrhizal fungi were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antarctica; Deschampsia antarctica; Low temperatures; Mycorrhizal fungi.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401737
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