1. Department of Microbiology Oregon State University Corvallis Oregon USA
2. College of Earth, Ocean, and Atmospheric Sciences Oregon State University Corvallis Oregon USA
3. Marine Biology Research Division, Scripps Institution of Oceanography University of California San Diego California 92093‐0202 USA
4. Centre for Arctic Gas Hydrate, Environment and Climate (CAGE), Department of Geosciences UiT The Arctic University of Norway N‐9037 Tromsø Norway