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| Pierini,Sandra Andréa; Thomaz,Sidinei Magela. |
| In this work, regression analyses were used to test the effects of fetch, littoral slope and Secchi disk depth upon the stand width (Wi) and maximum (Zmax) and minimum (Zmin) colonization depths of Egeria spp in a large tropical reservoir (Rosana Reservoir). Littoral slope was the only variable correlated with Wi, which was larger in locations with lower slopes. The higher Wi values (up to 260m) were found in locations where slopes were lower than 0.05 m.m-1. Zmin and Zmax were correlated positively with fetch. Nevertheless, different relationships were found at lower and higher fetch values observed in the arms and in the main body of the reservoir, respectively. At lower values, Secchi disk depth was the main variable explaining Egeria Zmax. On the other... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egeria; Fetch; Littoral slope; Secchi disk. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200016 |
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| Mori,Edson S; Martins,Dagoberto; Velini,Edivaldo D; Marino,Celso L; Gouvêa,Cantídio F; Leite,Suzi M.M; Camacho,Edwin; Guries,Raymond P. |
| The aquatic plant species Egeria densa (Planch.) Casp and E. najas Planchon occur naturally in the Paraná River Basin of southeastern Brazil. Hydroelectric dam construction in the river basin has created several lakes, changing the ecology of the river and altering the population ecology of Egeria. Large, dense populations of Egeria now grow in Jupiá Lake and its tributaries, occasionally blocking hydroelectric turbines. This study is part of a larger project examining environmental changes associated with large dam projects; the research objective of this study was to assess patterns of genetic diversity in Egeria populations growing in Jupiá and Três Irmãos Lakes and their Paraná River tributaries using genetic markers. Forty-two plants of E. najas and... |
| Tipo: Journal article |
Palavras-chave: Egeria; Dam; Isoenzyme; Genetic distance; RAPD; Reservoir. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200008 |
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