{"id":25927,"date":"2021-10-27T15:00:11","date_gmt":"2021-10-27T22:00:11","guid":{"rendered":"http:\/\/community.nrs.com\/?p=25927"},"modified":"2022-07-06T16:13:26","modified_gmt":"2022-07-06T23:13:26","slug":"boaters-without-a-river-anglers-without-a-fish","status":"publish","type":"post","link":"https:\/\/community.nrs.com\/duct-tape\/2021\/10\/27\/boaters-without-a-river-anglers-without-a-fish\/","title":{"rendered":"Boaters without a River, Anglers without a Fish"},"content":{"rendered":"

Climate change brings fishing closures and historic drought to a river near you.<\/em><\/p>\n

River trips are often a welcome respite from an arduous daily life. We anticipate them with glee, and they can often pull us through those more stressful times in our lives. The light at the end of the tunnel. But what if that light is slowly dimming to the point that you can hardly see it? What if river trips are becoming a thing of a healthy ecology of the past?<\/p>\n

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Middle Fork of the Salmon, Photo: Ashley Peel<\/figcaption><\/figure>\n

Nick Braun and Laura Gaylord, two on-and-off raft guides and general river lovers from Jackson Hole, experienced such a scenario when they began a Desolation\/Gray trip earlier this summer. Shortly after launching from Sand Wash, they noticed something out of the ordinary. The water was not only more turbid than usual, but it was also sprinkled with floating dead fish. As their trip progressed, the river slowly filled with the carcasses to the point that it was impossible to sneak a cooling dip in the river.<\/p>\n

\u201cI\u2019m a far cry from a biologist, but it seemed to me to be a mass mortality type of event,\u201d Nick told me. \u201cTwenty to thirty bloated, dead fish recirculated in the eddies.\u201d The light was dimming for them. Heavy smoke in the air and a typically clean river full of dead fish tainted the relief that they had long looked forward to on this river getaway. They wondered what had caused such destruction.<\/p>\n

The problem doesn\u2019t lie in this one-off mortality event, however. This is, in fact, part of a larger issue that lies in bodies of water across the West, from Colorado to Idaho and Wyoming to Washington, on the Colorado River, the Yampa, the Snake, and countless other rivers. I wanted to look into the science behind these events because I had my own awakening this summer as well.<\/p>\n

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Unnaturally higher than average flows on the Snake River in Wyoming. Photo: Float-O-Graph<\/figcaption><\/figure>\n

I traveled to Colorado for a rugby tournament and some of us were hoping to fish the Yampa. It was closed. Back in Jackson, we enjoyed higher than average flows for most of the summer, despite enduring one of the worst droughts in history. A friend who often kayaks the Columbia noticed more dead fish this summer than ever before. Nothing as significant as these events could be a coincidence, I thought, and I wanted to do some research. I owed it to my nerdy high school self.<\/p>\n

The intermountain west saw a tumultuous summer. We have all probably experienced that in some form or another. More than 60% of the western United States continues to suffer some of the worst drought conditions ever. As of August 19, well over three million acres have burned in unprecedented wildfires<\/a>. For the first time in history, the Bureau of Reclamation officially declared a water shortage<\/a> at Lake Mead, affecting the entire Colorado River Basin for the foreseeable future. This declaration and following action will inevitably lead to water supply reductions for the nearly 40 million people that rely on this water source farther downstream. The lake is predicted to hit its lowest level since the construction of the Hoover Dam that began slowly halting the mighty river\u2019s meandering progress toward the Gulf of Mexico in 1936\u2014nearly a century ago.<\/p>\n

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Hoover Dam, Photo: Creative Commons<\/figcaption><\/figure>\n

Farther north, both boaters and anglers felt the burning sting of worsening climate change this past summer. The Yampa River<\/a>, which flows through Steamboat Springs, Colorado, restricted all commercial activity starting on May 24. This included boating and fishing as well as a voluntary closure for all recreational activities. In Colorado alone, the Upper Colorado, Snake, Eagle, Dolores, Animas, Elk, and Roaring Fork Rivers all experienced varying degrees of restrictions throughout the summer.<\/p>\n

One effect of a warming climate and air temperatures is that they closely correlate with rising river water temperatures and lower flows. The warmer a river’s water, the less dissolved oxygen is present, and this inflicts more stress on the local fish populations. Fish are naturally cold-blooded, which means their core temperatures are directly related to the temperature of the water around them. When this temperature rises beyond their tolerated thresholds, they become sluggish, have faster metabolisms, yet won’t eat; they can\u2019t migrate successfully, have lower reproductive rates, can suffocate, and can even develop severe diseases not found in cooler environments<\/a>.<\/p>\n

For example, Rainbow Trout favor temperatures between 50- and 65-degrees Fahrenheit, Browns prefer between 52 and 73, and Brookies thrive in water temperatures between 48- and 65-degrees Fahrenheit. Anglers can find all three of these species in the Green River where our friends Nick and Laura were dodging bodies. The average summer water temperature for the Green is between 60 and 75 degrees. In July and into August of this year, the Green climbed as high as 84 degrees Fahrenheit.<\/p>\n

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Photo: Creative Commons<\/figcaption><\/figure>\n

Moving on to another seemingly isolated incident: the Shoshone section of the Colorado River near Glenwood Springs, Colorado, sustained a devastating wildfire in Glenwood Canyon last summer, as Lindsay DeFrates chronicled in “Floating Through Fire.<\/a>” This summer, the burn scar left in the canyon has led to multiple destructive mudslides that continuously close the highway. In addition to the inconvenience posed to motorists, this closure has all but stymied local whitewater activity, forcing companies onto other, smaller volume rivers or farther down on the Colorado. The reduced visibility and increased turbidity that the mudslides introduce to the river also heavily impact the fish.<\/p>\n

Even farther north, near Jackson Hole, Wyoming, the Snake River experienced historic flows as well, but not in the ways you might expect from all this doomsday speak. As I mentioned in the beginning, boaters there enjoyed higher than average levels throughout the summer\u2026but don\u2019t pack up your mambas or Maravias yet. Despite a decent 2019\/2020 snowpack, the Snake River was actually higher because dam operators at Jackson Lake Dam were releasing unprecedented amounts of water to the drought-stricken farmers and reservoirs farther downstream in Idaho, according to the Jackson Hole News & Guide.<\/p>\n

Continuing downstream on the Snake and onto the Columbia River, which the Snake empties into, temperatures have been so high that sores, caused by a fungus that only thrives at high water temps, riddle sockeye salmon,<\/a> the likes of which they often can\u2019t survive. Salmon thrive in water that is well below 68 degrees, however, the reservoirs on these two rivers all reached temperatures above 70 toward the end of the summer, according to the Natural Resource Defense Council. One focal reason for these detrimentally high-water temperatures is obviously the changing climate. Another factor that contributes are the dams themselves.<\/p>\n