These are good sources for peer-reviewed articles in marine and environmental sciences. Over 90% of what is found here will be peer-reviewed (scholarly). To learn more about how to identify peer-reviewed articles, see the tutorials on this page.
BIOSIS (primary article database for biology)
GeoRef (primary article database for earth sciences)
GreenFile (environmental articles covering many disciplines)
ScienceDirect (articles from all aspects of science)
SpringerLINK (selected-not all- journal titles available from this major publisher in science)
Web of Science (articles from the most important journals in all disciplines)