Fish in Northwest have new hopes for home In this undated photo provided by NOAA Fisheries, underwater antennas are visible stretching across the Little River, a tributary of the Elwha River in Washington state, where they track fish as part of intensively monitored watershed studies to determine how the fish respond to habitat restoration. (John McMillan/NOAA Fisheries/Thinkstock)
Fish in Northwest have new hopes for home
Lexile

Scientists in the Pacific Northwest are studying more than a dozen watersheds to develop templates on habitat restoration. The templates could be used in similar streams to bolster struggling fish populations.
 
The federal government lists 28 populations of salmon and steelhead on the West Coast that need protections due to low numbers. This is despite spending millions of dollars every year on restoration efforts.
 
The studies aim to make those efforts more successful. They focus on 17 watersheds in Washington, Oregon, Idaho, Northern California and British Columbia.  They examine the benefit of everything from dam removal to building artificial beaver dams in tributaries.
 
Creating templates for habitat restoration could save time and money by using strategies known to produce good results in similar habitats in the region, said George Pess.  He is a research fisheries biologist for the National Oceanic and Atmospheric Administration.
 
"The overall goal is to learn enough to be smart about our restoration," he said, noting that the studies will offer recommendations to private, tribal and government entities but won't produce any legally binding regulations.
 
Most of the studies began in the 2000s. Pess said scientists are still discovering what works and the program will require years of monitoring. They are examining how fish use waterways and the challenges salmon and steelhead face throughout their lives in the different watersheds.
 
In previous restoration efforts, officials have taken out barriers such as dams. That opens up spawning habitat. The studies go further, as well.  They try to determine whether removing the barriers leads fish to change when they go to the ocean and return as adults, Pess said. That would mean restoration efforts need to ensure enough water flows through streams at critical times.
 
"It's a terrific and much-needed project - getting a scientific basis for really teasing out the factors preventing the recovery of wild steelhead and salmon," said Guido Rahr.  He is president of the Wild Salmon Center.  It works to protect rivers and wild salmon populations. "They've chosen watersheds with diverse and different geographies. It's really going to be helpful."
 
In northern Idaho's Potlatch River, a tributary of the Clearwater River, monitoring started in 2005. Restoration work began in 2009. About 1,000 wild steelhead use the Potlatch.
 
Last year, state workers for the first time counted steelhead-spawning beds above an area where a dam had been removed, said Brian Knoth. He is a fisheries biologist with the Idaho Department of Fish and Game.
 
Whether opening new habitat increases fish numbers or simply causes the existing population to spread out is a frequent question in the 17 study areas.
 
To get an answer, scientists place small tags in fish that give off a signal when passing through an electronic field. That allows young fish leaving and then returning as adults to be counted.
 
On central Oregon's Bridge Creek, workers have built artificial beaver dams as part of the study, discovering that the real animals moved in to expand on human efforts.
 
"It's OK if natural beavers join in on the fun," said Stephen Bennett, a research associate of watershed sciences at Utah State University. He is involved with that and other studies.
 
Of the 17 studies, nine are in Washington state. Perhaps the most ambitious involves the Elwha River and the 2012 removal of a 100-foot dam that increased habitat by 300 percent. It more than a doubled spawning beds for Chinook salmon and steelhead above the dam site.

Filed Under:  
Assigned 56 times
CRITICAL THINKING QUESTION
How do dams help the fish?
Write your answers in the comments section below


COMMENTS (31)
  • taylorl-3-bar
    2/22/2016 - 11:39 a.m.

    The dams help the fish because of the water, they need to drink it. I chose this article because I also wanted to know how the fish survived.

  • nariahb-
    2/22/2016 - 02:02 p.m.

    Dams help the fish by giving them a new area to spawn in. It gives the fish a wider area to live. It helps the scientists by giving them new reasons to study how fish live.

  • lilyg-2-bar
    2/22/2016 - 10:20 p.m.

    Dams help the fish by opening up new homes and areas for them to live with more water to help them survive. "That opens up spawning habitat." I always looked at dams as a dangerous thing, but they can, also help fish find more places to live and they prove to actually be very helpful.

  • miriamu-sch
    2/26/2016 - 01:41 p.m.

    Who:Salmon and Steelhead fish
    What:Salmon and Steelhead fish dying
    When:2\18\16 (now)
    Where:In Northwest of California
    Why:Beaver dams are covering the stream to go up because the dams block the water so fish can't go up stream
    How:Removing beaver dams and placing/making beaver dams someplace else helping by letting the fish go up stream and into new parts of the world/river

  • miriamu-sch
    2/26/2016 - 01:45 p.m.

    Critical question:

    Dams help fish by giving them a new area to live and repopulate in.It also helps them by helping them to not get eaten by other predators such as Grizzly bears and people.

  • Steve0620-yyca
    3/09/2016 - 03:07 a.m.

    I think that the people are doing a good job to help the species of fish that are low or endangered. Some people are removing dams or tracking fish down to see what strategy works and what don't. Some have also built artificial dams which some animals come out and expand. I hope that the people will be successful and help the species of the fish or animals to grow and prosper. It will be bad if a species of animals go extinct. Many people are still researching and trying to find different ways to help.

  • jacih-fel
    3/16/2016 - 02:12 p.m.

    Dams help the fish by giving them a new area to spawn in. It gives the fish a wider area to live. It helps the scientists by giving them new reasons to study how fish live.

  • victoriae-fel
    3/16/2016 - 02:12 p.m.

    Dams help fish because it opens up a new spawning habitat.

  • haleyd1-fel
    3/16/2016 - 02:13 p.m.

    Dams help the fish by opening up new homes and areas for them to live with more water to help them survive.

  • coled-fel
    3/16/2016 - 02:13 p.m.

    CTQ: Dams help fish by making a blockade so fish do not swim to far up or down stream.

Take the Quiz Leave a comment
ADVERTISEMENT