Thursday, September 20, 2018

An Entomological Who Dunnit

Jeff Lockwood's book, Locust: The Devastating Rise and Mysterious Disappearance of the Insect That Shaped the American Frontier is available on Amazon, where I reviewed it.

Scientific understanding usually shuffles along in the two-to-three-year steps of graduate student research projects. Big, intriguing mysteries take longer to resolve, but are more fun to research—and more interesting to read about.

Jeff Lockwood tackled the mystery of why the Rocky Mountain locust went extinct at the dawn of the 20th century. The species' periodic irruptions rivaled the bison in terms of biomass and the 1875 outbreak still horrifies young readers of Laura Ingles Wilder's, On the Banks of Plum Creek. Then the insects disappeared.

In his book, Lockwood recounts the challenges of sleuthing out a big mystery. Big research projects require new research techniques and years of soul-crushing data collection. Papers describing new research findings are sometimes rejected by academic journals; colleagues sometimes snicker. Unearthing the Rocky Mountain locust's secrets required field work at remote high elevation "grasshopper glaciers" reached by difficult climbs in foul weather.

Big research projects need lots of brains and lots of backs. Lockwood doesn't hog the limelight; he credits his employees, students, and colleagues for their inventions and insights. Field research is carried out by people, so it's a social activity, which Lockwood captures. A twenty-five-mile hike, completed in the dark, isn't quite as bad when you're not suffering alone, and joy shared at discovery is joy multiplied.

Other ecological changes in the late 19th century might have been linked with the locust's disappearance: decline of the bison, changes in climate, or reduced burning by Native Americans. Lockwood guides readers through the possibilities and explains why he rejects each. He focuses instead on the ecological bottleneck of limited egg-laying sites in valleys of the northern Rocky Mountains. Lockwood determines that when settlers plowed and grazed these areas, they destroyed the locust's eggs, and with them, the species. The culprit was settlers, in valleys, with plows, by accident.

Although the Rocky Mountain locust's sky-filling swarms are gone with the thundering bison herds, Lockwood ends his book by wondering if a few individuals may live incognito in less disturbed valleys of the Rockies. Another big, intriguing mystery.

Monday, September 10, 2018

Marathon health, lava stroke, and natural resources

Mike Medberry's book, On the Dark Side of the Moon is available on Amazon, where I recently reviewed it.

Mike Medberry's legs carried him uphill to finish a half marathon the day before a clot in the 44-year-old's brain stopped blood flow, immobilizing his right side and scrambling his speech. His was the kind of stroke you want to have in the ER parking lot. But Medberry was hiking across lava at Craters of the Moon National Monument in Idaho. He spent most of a day waiting to be found and whisked to a hospital.

Medberry "became pure observer" while wounded and waiting on the lava. He describes the stroke clearly enough that I don't have to experience one myself to feel I have a working knowledge of the condition.

Recovering, Medberry learned to brush his teeth, drive, navigate phone trees, speak, and write. His struggles to organize his thoughts are heart-breaking. "…[T]he pieces of [his] brain were a blizzard of blowing pages ripped from a book." Medberry's emotional struggles are inspiring. His falling in love and recovering enough to say, "I do," are triumphs.

Interwoven with Medberry's own story is the story of Craters of the Moon. He was working to expand the national monument when the stroke found him. Even after the stroke, he hiked and found peace on the lava.

I enjoyed Medberry's descriptions of Idaho landscapes, but I wondered about a few points in his discussion of cheatgrass. He's correct that the exotic annual grass fuels wildfires that damage native vegetation and the wildlife habitat it provides. But I cringed when I read that cheatgrass is "[a] poison brought here by cowboys, for cows." In its native range, cheatgrass is an insignificant grass that doesn't inspire purposeful sharing. Researchers understand that the grass was inadvertently introduced to the U.S. West.

The stark black and white cover photo of a hiker leaning against gravity to climb lava echoes the contrast between Medberry's marathon health and lava stroke. Natural resource issues are rarely as clear cut and the actors, both people and plants, are rarely completely good or evil.