The Current: Riparian habitats for birds at risk along Colorado River (column)
October 6, 2017
In the arid West, we often hear how the Colorado River supports people — it provides drinking water to nearly 40 million in seven states, irrigates 5.5 million acres of farmland and ranches, supports 16 million jobs and has an annual economic impact of $1.4 trillion.
We also hear about in-stream flows necessary to support our beloved fish populations and summer recreation adventures. We hear less about our avian friends — the 400-some species of birds that depend on riparian habitats such as wetlands and marshes that dot the Colorado River. Even lesser known are the network of western saline lakes that provide critical habitat for global migratory birds — populations that are drastically dwindling due to climate change as well as dams, diversions and increasing water demand.
bursts of life
Whether stopping along Gore Creek in Vail, Nottingham Lake in Avon or at Gypsum Ponds and Dotsero, you will likely hear the song of one of our local birds. In the springtime, their return from the south signals the coming burst of life into our valley.
Eagle County encompasses not only the entire length of the Eagle River, but 55 miles of the Upper Colorado River, as well. Whether yellow warblers, American white pelicans, summer tanagers, sandhill cranes, marsh wrens, grebes, cinnamon teals, willow flycatchers or white-faced ibises, bird songs in our valley uplift spirits, as well as play a critical role in our intricate food webs.
This July, Audubon released the first comprehensive report of climate change's effect on bird populations in the Southwest. According to the Audubon report, although riparian zones make up 5 percent of the Southwest, they support more than 50 percent of all regional breeding bird species, which includes more than 400 species along the entirety of the Colorado River and 250 species of wildlife along the Eagle and Colorado rivers in Eagle County. Commonly seen species such as the yellow warbler and summer tanager have significantly declined with the loss of cottonwood-willow forests and similar habitats.
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The destruction of habitat can be attributed to two main culprits: climate change and changes in water use. Rising temperatures due to climate change increase aridity and evaporation and disturb the natural cycles of flooding and insect hatching. The water diversions along the Colorado River have also invited the spread of invasive plants such as tamarisk, which reduce the overall biodiversity that make up these important riparian habitats.
The lesser-known saline lakes are also being affected. These landlocked saltwater lakes provide birds with a critical network for migratory pathways to and from breeding grounds and winter escapes. Climate change is spurring these lakes to dry up, increasing the salinity and even introducing toxic dust into our air.
not all bad news
The future for Southwestern birds isn't all grim, however. Collaborative and creative multi-stakeholder solutions such as Minute 319 in the Colorado River Delta have been a great start and template for tackling the complex issues that surround the Colorado River basins. For the first time in decades, the sounds of migratory birds can be heard again where the Colorado River meets the Sea of Cortez.
That's because of an experimental pulse flow that released billions of gallons of water for several weeks to the bone-dry delta in 2014. This agreement between the United States and Mexico, called Minute 319, was an effort to begin restoring the delta to the historic ecological function it has provided for tens of thousands of years. A whole generation that had never seen the Colorado River meet the sea was able to play in water and see life spring back to the area.
The Bureau of Reclamation's Conservation Pilot Program, enacted in 2014, is another important example of a collaborative solution. Through a voluntary program incentivizing farmers to utilize innovative agricultural irrigation systems, more than 60,000 acre-feet of water was saved and kept in the river.
As longtime Edwards local Eleanor Finlay puts it, "For me, there is great joy in seeing so many different birds on the river and to greet them like old friends every year. These migratory birds also help me feel a connection with our neighbors to the south and north. Migratory birds do not recognize the artificial boundaries humans have drawn all across the globe. They need to find acceptable habitat all along their journey, which often stretches from South America to Canada."
Take a moment today when you step outside to really listen to the birds around you: What would it mean if you were met instead by silence?
Lizzie Schoder is the education and outreach coordinator for Eagle River Watershed Council. The Watershed Council has a mission to advocate for the health and conservation of the Upper Colorado and Eagle river basins through research, education and projects. Contact the Watershed Council at 970-827-5406, or visit http://www.erwc.org.