Holocene environmental evolution of the southern brazilian shelf: comparison between two high-productivity, upwelling and non-upwelling areas - Sousa, Silvia Helena de Mello e; Nagai, Renata Hanae; Andrade, P C; Mahiques, Michel Michaelovitch de; Burone, Leticia; Alves, D P (Joint IMBER / LOICZ Continental Margins Open Science Conference, 2007)