Spatial and temporal variation of Hypnea musciformis carrageenan (Rhodophyta - Gigartinales) from natural beds in Rio de Janeiro State, Brazil

2007 ◽  
Vol 20 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Renata Perpetuo Reis ◽  
Yocie Yoneshigue-Valentin ◽  
César Pereira dos Santos
Keyword(s):  
Temporal Variation ◽  
Rio De Janeiro ◽  
Spatial And Temporal Variation ◽  
Hypnea Musciformis ◽  
Janeiro State

Population structure of the invasive bivalve Isognomon bicolor on rocky shores of Rio de Janeiro State (Brazil)

2009 ◽  
Vol 90 (3) ◽  
pp. 453-459 ◽  
Author(s):  
A. Breves-Ramos ◽  
A.O.R. Junqueira ◽  
H.P. Lavrado ◽  
S.H.G. Silva ◽  
M.A.G. Ferreira-Silva
Keyword(s):  
Population Structure ◽  
Temporal Variation ◽  
Rio De Janeiro ◽  
The Other ◽  
Rocky Shores ◽  
Reef Structure ◽  
Janeiro State

The aim of this study was to compare the population structure of the invasive bivalve Isognomon bicolor in three different areas on the coast of Rio de Janeiro State and to verify its temporal variation. All the areas presented high densities, reaching more than 1000 live individuals per 100 cm2. The number of dead individuals and recruits was higher in Ilha do Brandão (Angra dos Reis) than in the other areas. The individuals sampled at Praia Vermelha (Rio de Janeiro) presented the highest maximum and mean sizes, compared to those found at Ilha do Brandão. In this area, vermetid molluscs are dominant and build a complex reef structure where only a few individuals of I. bicolor can really grow.

scholarly journals High Uranium Concentrations in the Groundwater of the Rio de Janeiro State, Brazil, Mountainous Region

2018 ◽  
Author(s):  
José Godoy ◽  
Paulo Ferreira ◽  
Elder de Souza ◽  
Larisse da Silva ◽  
Isabela Bittencourt ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Mountainous Region ◽  
Janeiro State
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