Absolutely. Actually, in the California process, you'll see that some of the marine protected areas are adjacent to land protected areas so that you maintain the quality of the environment and the connection.
The poster child for that is the Great Barrier Reef in Australia, where there's an awful lot of sediment discharge and eutrophication from terrestrial influx that's having an impact on coral reef systems within protected areas. That's an example where by not protecting the quality of the land environment, and its influence on the marine environment, you jeopardize the conservation value of the protected area.