. Coast watch. Marine resources; Oceanography; Coastal zone management; Coastal ecology. On the lower Columbia River, a natural boundary between the states of Oregon and Washington, at least 61 of the 292 known plant and animal species are non-native. Some, such as the Asian clam (Corbiculaflumine, so thoroughly dominate the sediment in some stretches of the Columbia that little else can survive. If that's not bad enough, these dumped. For nearly two years, Herwig's crew has been testing the new equipment in the field, working aboard the oil tanker S/T Tonsina. It is one of a fleet of tankers
. Coast watch. Marine resources; Oceanography; Coastal zone management; Coastal ecology. On the lower Columbia River, a natural boundary between the states of Oregon and Washington, at least 61 of the 292 known plant and animal species are non-native. Some, such as the Asian clam (Corbiculaflumine, so thoroughly dominate the sediment in some stretches of the Columbia that little else can survive. If that's not bad enough, these dumped. For nearly two years, Herwig's crew has been testing the new equipment in the field, working aboard the oil tanker S/T Tonsina. It is one of a fleet of tankers that carries oil — and ballast water — from the Port of Valdez in Southeast Alaska, to Long Beach, Calif., Puget Sound, Wash., and other destinations along the Pacific Ocean coast. ballast water — and the Tonsina would provide a demonstration opportunity to evaluate how the ozone theories would translate to real shipboard experiences. HARMLESS, HI-TECH FIX Ozone gas is produced when an electrical impulse is shot through air that is rich ir. LEFT TO RIGHT TOP TO BOTTOM: The deck of the Tonsina — note ballast tanks along the sides and bottom of the tanker. Ballast water-sampling equipment at the ready. Filling a sample bottle with water pumped from one of the Tonsina's 12 ballast tanks. Fine-meshed zooplankton nets capture ballast water organisms. Zooplankton samples are concentrated in the plankton net and placed in a plastic container. introduced pests can proliferate to such a degree that, like zebra mussels, they will eventually clog irrigation ditches and fish screens. With funding from a National Sea Grant initiative and other sources, Cooper and his West Coast counterpart, Russ Herwig, with the Washington Sea Grant Program in Seattle, are looking at ways to curb future introductions of ballast water organisms along the nation's coasts. For the past three years, Cooper has been working with a team of scientists to develop the technology to treat ballast water before
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Keywords: ., bookcentury1900, bookcollectionunclibra, booksubjectoceanography
