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)
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)