Episode 31: How Rice Fields may help Salmon Runs

Since fundamental changes were made to the way rice straw is managed following harvest in the early 1990s,  Sacramento Valley rice country has steadily grown as a vital rest and refuel stop for millions of birds.  Local rice fields not only provide habitat for nearly 230 wildlife species, the value of rice fields for the environment is proving to be even greater during drought years, because there is less water on the landscape and fewer habitat options.

What's next for the environmental crop? If promising research by the Rice Commission and UC Davis pays off, Sacramento Valley rice fields may one day help dwindling salmon runs.

The third year of field work for the salmon project has just completed, and the last of the baby salmon raised on Steve Neader's Sutter County rice farm have been released and are heading out to the ocean. Through sophisticated tagging, their journey will be studied. The ultimate hope is that rice fields specifically managed for this purpose will provide an even greater role in preserving and enhancing the California environment.

"I'm extremely optimistic about it," remarked Andrew Rypel, one of the study leaders and professors in the Department of Wildlife, Fish & Conservation Biology at UC Davis. "All of the data we have collected points to the fact these fields are going to be helpful for, not just salmon, but lots of native fishes."

There were new elements in the latest year of the project that will ultimately help researchers adapt the habitat management strategy and understand prospects for future success.

 "This is the first time we've ever done the project on full size rice fields, with about 125 acres devoted to testing the practice at scale, " said  Paul Buttner, Environmental Affairs Manager of the California Rice Commission. "One of the things we needed to make sure is that we could allow the fish to move freely through all of the checks in the field and out of the field when they want to, which is called volitional passage. We put in specialized boards with holes and notches to allow the fish to move through the system entirely."

Buttner stressed the importance of partnerships to make this multi-million dollar project successful, including the scientific research from UC Davis and other technical partners.

"It would not be possible without funding, that comes first and foremost from USDA's Natural Resources Conservation Service," he said. "They provided over half of the funding for the project. All of the funding they provide has to be matched with private sector contributions, both financial and in-kind. Syngenta and State Water Contractors have really stepped up with major contributions, and we have a long list of other sustaining contributors as well.  The full sponsorship list can be seen at http://salmon.calrice.org/#Sponsors."

As the salmon left the rice fields to start their journey to the ocean, it was a somewhat emotional time for researcher Alexandra Wampler of UC Davis.

"I'm very excited," Wampler said. "I can't wait to track their migration to the ocean. We have a very dense receiver array, so we should be able to track each step they take, and it's going to be very exciting."

It will take a while longer to determine the viability of the project, but those involved remain optimistic that, perhaps one day, Sacramento Valley rice fields will add a significant new area to their environmental benefits.

"I think that rice fields have the same opportunities for the salmon as they did for waterfowl," said Carson Jeffres, research ecologist at UC Davis. "It's a little bit different. It takes different opportunities because fish can't fly, so you have to make it available for them, as opposed to having it just available for them to fly to. There's those same possibilities that we have, and I think that we've really turned a big corner in doing that, and we're starting to see those benefits being realized on the landscape right now."

Episode Transcript

Jim Morris: The environment holds special importance in California, and salmon represent one of the most beleaguered species in what now is year three of a major drought. There is a ray of hope in the form of a partnership being lived out in the rice fields of the Sacramento Valley.

Jim Morris: Welcome to Ingrained, the California Rice podcast. I'm your host, Jim Morris, proud to have worked with the state's farmers and ranchers for more than three decades to help tell their stories. Environmental