NW, Suite , Washington, DC , USA, Tel. Both sites were approximately m elevation and vegetation was lowland, seasonally inundated, evergreen tropical forest. ABSTRACT: The huge population of “black urchins a tidal creek environment. Club), 28,7–9. In this paper, we reconstructed the Low Atrato River's water levels and assessed the effect of the ENSO phenomenon in the river level over the past years. DACW BLACK GLUME RED. ) AND. Braz Arch Biol Tech. RICE (Oryza sativa L. e river was at high. () , Fax: () , e-mail: