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Study Says Loss of Wolves Damaging Olympic National Park's Forest Ecosystem


An over-abundance of elk is damaging the rainforest ecosystem of Olympic National Park, according to an Oregon State University study. OSU photo.

To many, the heart and soul of Olympic National Park is the temperate rainforest. There so much moisture falls that places such as the Hoh Rainforest and the Queets valley feel spongy, the air heavy with humidity.

Indeed, when the park was set aside in 1938, it was done so "to preserve the finest sample of primeval forests in the entire United States."

But there's trouble in this paradise, according to a study from Oregon State University. The loss of wolves from the park's ecosystem is causing a decline in those forests, for the predators are not around to keep Olympic's elk herds in check. As a result, the ungulates are over-grazing the forests.

This recently released study maintains that "the extermination of wolves in the early 1900s set off a 'trophic cascade' of changes that appear to have affected forest vegetation and stream dynamics, with possible impacts on everything from fisheries to birds and insects."

Published in the journal Ecohydrology, the report cites information gathered by the Press Expedition during its exploration of the Olympic peninsula in 1890. That expedition found the banks of the upper Quinault River “so dense with underbrush as to be almost impenetrable,” according to the OSU report. "Logs jammed the rivers, dense tree canopies shaded and cooled the streams, and trout and salmon thrived along with hundreds of species of plants and animals."

Such a scene is hard, if not impossible, to find today.

“Today, you go through the same area and instead of dense vegetation that you have to fight through, it’s a park-like stand of predominantly big trees,” says Bill Ripple, a co-author of the study and forestry professor at Oregon State University. “It’s just a different world.”

Elk, he says, are transforming Olympic's landscape as streamside ecosystems are losing young trees to the voracious animals.

Compounding the problem of wolf eradication was the creation of the national park in that it offered protection to the elk from hunters. As a result, their numbers soared and vegetation tumbled.

“Our study shows that there has been almost no recruitment of new cottonwood and bigleaf maple trees since the wolves disappeared, and also likely impacts on streamside shrubs, which are very important for river stability,” said Robert Beschta, lead author of the study and professor emeritus of forest hydrology at OSU. “Decreases in woody plant communities allow river banks to rapidly erode and river channels to widen.

“Tree and shrub species along stream banks and floodplains started crashing first,” Professor Beschta explains. “Then, apparently, the rivers began to unravel. Now we have large areas where the forest understory vegetation is mostly just grasses and ferns.”

The report notes that streams that once flowed in tight channels held in check by thick vegetation have broadened and become braided. Too, the scientists note that the water is open to the warming sun and less enriched by plants and insects. Nearly half of the terraces along the Queets River have disappeared because of accelerated erosion over a period of multiple decades.

“We’ve seen the impact of wolves on the ecosystem in Yellowstone, the effect of cougars in Yosemite National Park, the same basic story about the importance of key predators being played out in many different places,” Professor Ripple says. “What’s so surprising here is that it’s happening in a temperate rainforest, which is hugely productive and has such high levels of vegetation growth. But even there, when the ecosystem gets overwhelmed with many large herbivores, the vegetation just can’t keep up.”

An effort was considered to restore wolves to the park ecosystem in recent years, but no decision or actions have been undertaken to accomplish that.


you have a couple of valid points but besides the fact that the wolves cant get there on their own everything else is crazy talk.  how do you think your alive today? all of your ansestors for thousands of years made it by eating meat.  not cattle from the store but cattle they raised so it didnt have the preservitives and added chemicals and they hunted!  you would not be here today if they did not eat meat. hunting when dobe correct is a great thing.  i agree that most litter and do not respect the land but not all are like that.  I live in wyoming and hunt and fish.  i have not purchased meat from a store in 10 years.  all i eat meat wise i harvested myself.  I am a much healthier person for that.  i would put my health as a 40 year old p.e/health teacher against anyone!  
Dont assume ALL hunters are bad, and wolves are good.  look at yelowstone in the spring time and tell me what is fair for elk?  hundreds of calves killed and barely touched (extreme suffering) or a bullet to the vitals and a swift kill and the entire animal is used.  Hunting is again good when done right!

Reintroducing wolves to the ecosystem would be best but it is expensive and has politically implications.  Let biologist decide a number of elk to cull from the heard each year and sell permits to hunters.

What we need if I'm following Jennifer's line of reasoning is, with modern science, reintroduce all dinosaurs where they once roamed.  We just need to experience the feeling that we aren't at the top of the food chain, we aren't by the way.  I grew up in the same neighborhood as Jennifer and relate, some.  Is it better for people to not experience the connectedness to nature but looking at their food source as nothing more than packages in a grocery store?  To have someone else actually do the growing and butchering so we can live detached from reality?  Seems LESS responsible to me.  There are some more mature and respectable hunters, scientists, park managers, game managers, environmentalists than others.  I believe there is no difference in the temptations they all face along their chosen paths.  The most fond and emotional pleas that go out still have to live in the realities that have always been.   I, personally, have felt more connected to nature when I've been in a very thick Spruce thicket looking down at a huge Brown Bear footprint in thick moss that is still rising fro the compression seconds before, but I don't think it's a good idea to reintroduce Grizzly Bears to California Middle School playgrounds :).

I have lived on the Olympic Peninsula virtually all my life and seen the horrific effects of logging and hunting over the years.  With virtually no regard for the lives and rights of the forest inhabitants hunters and loggers have forever altered the ecosystem and the losses are beyond calculation.  We will not, within our lifetimes and possibly never, see the magnificence of the forest as I knew it as a child.  My family made its living with logging and milling and were a part of the destruction,. realizing it with regret but feeling trapped by economic need. The agencies in charge let us down greatly by looking at the woods as a commodity to be mined and not a complex and holy thing.  The wolves are part of the mysterious working of the forest as a living entity.  They are clearly needed to help restore the Hoh and other river valleys and if we can only get started the wolves would work magic.  There is no way we as people, no matter how egotistical we are, can know it all. Destroying the wolves and seeing the results proves this, if it needed proving.  But we must not depend on the wolves migrating into these areas on their own.  They cannot swim the Straits of Juan De Fuca nor can they swim Puget Sound, even if they could make it across I-5.  The superhighway, the cities and the suburbs, the railroad and the waterways virtually guarantee they can not repopulate and the barrier, huge and dangerous, exists all the way from deep into Canada down into Mexico.  We must help them and to hell with the hunters who complain.  I eat almost no meat at all and am healthier for it.  Humans don't need it.  For all the gear and ammunition, gas and time off work, not to mention the beer, they could eat domestic cow steak every night if they must eat animals.  Too many of them just enjoy killing and to me that is a disgraceful crime.  There is something wrong with people who enjoy murdering.  I can understand people who are truly poor but there are also now other options for them.  The hunters upset the balance of the ecosystem and it is better left to nature who knows what she is doing.

if we send hunters in in huge numbers, poachers might kill the wolves, and more elk than can be safely killed, possibly causing underpopulation for the elks, and starving the wolves back out

We should use hunting as a tool to get wolves back and nature doing its thing again.

we need to reintroduse wolfs, why? it is because, the elk and deer heards are tearing up our forests! they are eating the plants that contain river banks, they eat the shoots of new trees. if we allow controlled hunting, people from all over the USA will come to Washington, to hunt the elk, and even with the hunting being controlled the elk numbers will still drop like flies.

From Sightline Daily
Bringing Wolves Back to Washington
Posted by Eric de Place
11/21/2008 11:05 AM

"In Washington, state officials are already drafting a Wolf Conservation and Management Plan. (The section on the history of wolves in Washington is especially fascinating.) The plan is undergoing scientific peer review now and will be available for public comment in early 2009. We expect that the plan will develop a management scheme for wolves that have returned to the state on their own; it likely won't have provisions for actively reintroducing them, not even into hard to reach places like Olympic National Park where they would surely thrive. I think that's a shame -- but the public comment period will be an excellent opportunity to offer corrections to the state's plan. Stay tuned."

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