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Toxic effects linger.
To the naked eye, Prince William Sound may appear “normal.” But if you look beneath the surface, oil continues to contaminate beaches, national parks, and designated wilderness. In fact, the Office of Technology Assessment estimated beach cleanup and oil skinning only recovered 3-4% of the Exxon Valdez oil and studies by government scientists estimated that only 14% of the oil was removed during cleanup operations.
A decade later, the ecosystem still suffers. Substantial contamination of mussel beds persists and this remarkably unweathered oil is a continuing source of toxic hydrocarbons. Sea otters, river otters, Barrow’s goldeneyes, and harlequin ducks have showed evidence of continued hydrocarbon exposure in the past few years.
The depressed population of Pacific herring – a critical source of food for over 40 predators including seabirds, harbor seals and Steller sea lions – is having severe impacts up the food chain. Wildlife population declines continue for harbor seal, killer whales, harlequin ducks, common loon, pigeon guillemot, and pelagic, red-faced cormorant, and double-crested cormorants.
Exxon-funded scientists have repeatedly dismissed evidence of on-going effects to wildlife from the massive 1989 oil spill by claiming that oil seeps contribute a bigger background source of hydrocarbons in bottom sediments in Prince William Sound.[18] Yet, they dismiss coal as a possible source due to ignoring location of known deposits and other factors about its “fingerprint.” A new study by the National Marine Fisheries Service concluded that the source is coal, and that coal hydrocarbons are not chemically available to impact wildlife.
Oil is more toxic than thought.
Even before the spill, scientists knew that a drop of oil could kill a bird’s egg. But after studying the impact of the Valdez spill, they now believe oil pollution is at least 100 times more toxic to fish than previously known. It is also more persistent.
In Katmai National Park wilderness, oil remained along the rocky coast with only slight weathering compared to freshly spilled oil after more than 5 years. Chemically, it was like 11-day old Exxon Valdez crude, with high concentrations of toxic polynuclear aromatic hydrocarbons (PAH’s).[20] In the past, it was presumed that wave action would have rapidly removed oil in such areas. Future releases of toxic oil can still affect wildlife.
New studies by the National Marine Fisheries Service show that even very low levels of weathered Exxon Valdez oil (0.5 to 1 part per billion PAH’s) are toxic at the early life stages of salmon and herring.[21] This data on toxicity to salmon eggs shows that current Alaska water quality standards allow hydrocarbon levels that can impair reproduction.
Exxon Valdez spill resulted in profound physiological effects to fish and wildlife. These included reproductive failure, genetic damage, curved spines, lowered growth and body weights, altered feeding habits, reduced egg volume, liver damage, eye tumors, and debilitating brain lesions.
MARINE MAMMALS
Sea otters -- 3,500 to 5,500 died. Continued exposure to hydrocarbons in 1998. Populations in heavily oiled bays not recovered.
Harbor seals -- 300 died. Most seals and pups oiled at contaminated haulouts. From 1989 to 1997, the population has declined 35% and continues downward.
Killer whales – Up to 22 died. Unprecedented mortality of females with calves. Males with collapsed dorsal fins subsequently died. Not recovered.
BIRDS
Common murres -- 175,000-300,000 killed. Minimum of 300,000 chicks lost, complete breeding failures at several large colonies from 1989 to 1991. El nino has set back recovery that was occurring.
Other seabirds -- 375,000 to 435,000 died. Declines of 16 species compared with earlier baseline surveys, including loons, black oystercatchers, pigeon guillemots, pelagic and red-faced cormorants, scoters, Barrow’s goldeneye, mergansers. Not recovered.
Harlequin ducks -- 400-1,000 died. Decreased molting populations and wintering survival for females in oiled areas, and evidence of exposure to hydrocarbons in tissues through 1998. Not recovered.
Marbled murrelets – 12,800 to 14,800 died. A large part of the world’s population at risk from the spill; Prince William Sound numbers declined 67% since the 1970’s. Population continued to decline to 1991. Not recovered.
Loons - 395 carcasses, 4 loon species. Common loons have small, slow reproducing populations. Not recovering.
FISH
Pacific herring -- Most salmon spawning and feeding habitats in Prince William Sound were oiled, causing egg and larval mortality and physical deformities. Unprecedented population crash in 1993, first year eggs laid in 1989 should have returned. Not recovered.
Pink salmon -- Increased mortality of eggs in oiled streams. Lower adult survival and juvenile growth rates and gross abnormalities in young fish in oiled streams. Oil-spill related collapses in pink salmon populations in 1992 and 1993. Some spawning streams still oiled. Not recovered.
Dolly varden -- Lower adult survival through 1991 in oiled areas. Rate of recovery unknown.
Cutthroat trout – At its northwest limit in Prince William Sound, its isolated ranges are highly vulnerable to pollution. Lower rates of growth persisted through 1991. Recovery rate unknown.
Rockfish, other marine fish -- Rockfish died from ingestion of oil and had sublethal injuries. Hydrocarbons were found in halibut; pollack; rock, yellowfin, Dover, and flathead sole; Pacific cod; and sablefish. Recovery rates unknown.
HABITAT
National Parks -- Oiled Kenai Fiords, Katmai, and Aniakchak National Park and Preserve. Buried oil remains in park beaches.
National Wildlife Refuges -- Kodiak, Alaska Peninsula/ Becharof, Alaska Maritime refuges oiled. Resources not recovered.
Chugach National Forest -- Wilderness study area oiled. Forest resources still injured.
Designated Wilderness -- Oiled Katmai National Park, Becharof National Wildlife Refuge, Kenai Fiords National Park wilderness study area, and Kachemak Bay State Wilderness Park. Invasion of more than 11,000 clean up workers, boats, and helicopters on remote beaches harmed wilderness values throughout spill area. Permanent loss.
Intertidal Communities – 1,500 miles of beaches harmed. Recent studies revealed that even on “cleaned-up” washed beaches, mollusks and other invertebrates were far less abundant than on comparable unspoiled beaches. Not recovered.
Subtidal Communities – Habitats providing shelter and food for an array of fishes, birds, and marine mammals were oiled, killing snails, clams, sea urchins, and invertebrates. Evidence of oil contamination in sediments, reduced abundance of clams and altered community composition persists. Not recovered.
Archeological Sites -- 24 sites were damaged by the spill and cleanup. Permanent injury.
America’s Public Lands – American’s were outraged and saddened by the Exxon Valdez spill. A study of the lost aesthetic and intrinsic values derived simply from knowing that the resources exist (“passive use”) estimated the damage to Americans at $2.8 billion.[26] Permanent loss to a priceless place.
I am not going to talk about the health concerns that affected the workers at the Exxon Valdez spill. We are (for the most part) very intelligent individuals here on ATS that realize that this Gulf Crises is very toxic not to mention what BP is dumping to disperse the oil as reported.
Our best case scenario as evident from this report 10 years after of the Valdez event brings a very grim picture to the gulf coastline due to the magnitude of oil being dumped. It’s interesting that our Government is more concerned about using this event to push an agenda then to realize the importance of what we are about to loose. ATS is just full of conspiracies on why, just pick one………..
I will end this post by wishing the best of luck to everyone. Hopefully our worst is the best case scenario...........
[edit on 16-6-2010 by Cloudsinthesky]
[edit on 16-6-2010 by Cloudsinthesky]
[edit on 16-6-2010 by Cloudsinthesky]
[edit on 16-6-2010 by Cloudsinthesky]