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| Muresan Paslaru, Bogdan; Cossa, Daniel; Richard, S; Burban, B. |
| The distribution and speciation of mercury (Hg) in air, rain, and surface waters from the artificial tropical lake of Petit-Saut in French Guiana were investigated during the 2003/04 period. In the air, total gaseous mercury (TGM) at the dam station averaged 12 +/- 2 pmol m(-3) of which > 98% was gaseous elemental mercury (GEM). GEM distribution depicted a day-night cycling with high concentrations (up to 15 pmol m(-3)) at dawn and low concentrations (down to 5 pmol m(-3)) at nightfall. Reactive gaseous mercury (RGM) represented < 1% of the GEM with a mean concentration of 4 3 fmol m(-3). Diel RGM variations were negatively related to GEM. In the rain, the sum of all Hg species in the unfiltered (HgTUNF) averaged 16 +/- 112 pmol L-1. Temporal... |
| Tipo: Text |
Palavras-chave: Fluxes; Speciation; Mercury; Artificial reservoir; Atmosphere. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3329.pdf |
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| Muresan, B; Cossa, Daniel; Richard, Sophie; Dominique, Y. |
| The distribution and speciation of mercury (Hg) in the water column, the inputs (wet deposition and tributaries) and the outputs (atmospheric evasion and outlet) of an artificial partially anoxic tropical lake (Petit-Sa-Lit reservoir, French Guiana) were investigated oil a seasonal basis in order to appraise the cycling and transformations of this metal. The total mercury (HgT) concentrations in the oxygenated epilimnetic waters averaged 5 +/- 3 pmol L-1 in the unfiltered samples (HgTUNF) and 4 +/- 2 pmol L-1 in the dissolved (HgTD) phase (< 0.45 mu m). On average, the monomethylmercury (MMHg) constituted 8%, 40%, and 18% of the HgT in the dissolved phase, tile particulate suspended matter and in tile unfiltered samples, respectively. Covariant elevated... |
| Tipo: Text |
Palavras-chave: Tropical environment; Artificial reservoir; Methylmercury; Mercury. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4198.pdf |
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| Laloe, Francis; Rey, Hélène; Durand, Jean-louis. |
| Whether what is at stake is land-use management and stabilising the economy of the shoreline areas for a good number of developed countries or involvement in food self-sufficiency, contributing to the balance of payments and stabilising employment for developing countries, in every instance, the economic and/or political importance of fisheries management as a business sector is far from being marginal in most of the countries concerned. Thus, from the moment the question of the inexhaustibility of the resources was posed, the desire to manage them manifested itself by the emergence of social demand, peculiarly at around the same time as research, due to the involvement of the researchers in the decision-making bodies of land-use and business management... |
| Tipo: Text |
Palavras-chave: Tropical environment; Artificial reservoir; Methymercury; Mercury; SEM. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/2006/acte-2081.pdf |
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| Colonetti, Sinara; Programa de Pós-Graduação em Ciências Ambientais, Universidade do Extremo Sul Catarinense, Criciúma, Santa Catarina; Citadini-Zanette, Vanilde; Programa de Pós-Graduação em Ciências Ambientais, Universidade do Extremo Sul Catarinense, Criciúma, Santa Catarina; Martins, Rafael; Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Porto Alegre; Santos, Robson dos; Programa de Pós-Graduação em Ciências Ambientais, Universidade do Extremo Sul Catarinense, Criciúma, Santa Catarina; Rocha, Edilane; Programa de Pós-Graduação em Ciências Ambientais, Universidade do Ex; Jarenkow, João André; Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Porto Alegre. |
| Apresentam-se os resultados de levantamentos florístico e fitossociológico em remanescente de Floresta Ombrófila Densa Submontana circunjacente à barragem do rio São Bento, objetivando fornecer dados primários para ações de restauração e conservação desta formação. A área está localizada no Sul de Santa Catarina, município de Siderópolis. Utilizou-se como área amostral um hectare e foram registrados indivíduos com DAP ≥ 5 cm e quantificados seus descritores estruturais. Foram identificadas 107 espécies, pertencentes a 42 famílias botânicas, totalizando 1.715 indivíduos. As espécies com maiores valores de importância (VI) foram Euterpe edulis Mart., Casearia sylvestris Sw. e Bathysa australis (St.-Hil.) K. Schum. Entre as espécies identificadas,... |
| Tipo: Fitossociologia |
Palavras-chave: Botânica riqueza específica; Descritores estruturais; Reservatório artificial; Mata Atlântica; Restauração 2.03.00.00-0 species richness; Community descriptors; Artificial reservoir; Atlantic Forest; Restoration. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/3345 |
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