https://www.whoi.edu/fileserver.do?id=24744&pt=2&p=28442 https://www.whoi.edu/fileserver.do?id=24744&pt=2&p=28442 is specifically on the deliberate introduction

https://www.whoi.edu/fileserver.do?id=24744&pt=2&p=28442 https://www.whoi.edu/fileserver.do?id=24744&pt=2&p=28442 is specifically on the deliberate introduction of iron into the ocean ecology to stimulate plankton growth.