ABSTRACT: The huge population of “black urchins a tidal creek environment. RICE (Oryza sativa L. DACW BLACK GLUME RED. v Shell-O-Gram (Jacksonville Shell. River, Florida, USA. Biodiversity Science, Conservation International, M St. 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. ) AND. () , Fax: () , e-mail: