Coastal marine ecosystems are recognized as highly productive systems, but their potential to store and sequester organic carbon, known as blue carbon, has largely been overlooked on the Pacific Coast of North America (Nellemann et al. 2009; McLeod et al. 2011). Vegetated coastal ecosystems, such as mangroves, salt marshes, seagrass meadows, and kelp forests are estimated to store carbon up to 12 times faster than terrestrial forests (Fourqurean et al. 2012).