A conference to explore the effects of building a Puerto Rican superport to accomodate transatlantic oil shipments in mega-tankers will be held today at 4 p.m. in Longfellow 100.

Among the problems the conference will discuss are the threat of an increasing domination of the Caribbean economy by the United States and by multinational oil cartels and the ecological threat posed by the oil tankers to Puerto Rico's coastal waters and residential areas.

Jose Garcia, professor of Medicine at the University of Puerto Rico, economist Pablo Rivera, and Ramon Arbona, secretary-general of the Puerto Rican Socialist Party (U.S. Zone) will be the featured speakers. "Denuncia un Embeleco," a videotaped collection of interviews with fishermen whose jobs would be affected by the superport will be shown.

The conference is sponsored by La Organizacion, a union of Puerto Rican students attending Harvard University.