Mount St. Helens eruption: Mount St. Helens eruption: How gophers transformed barren land in 43 years | World News

When Mount St. Helens erupted in 1980, a vibrant green landscape turned into a desolate wasteland of ash and gray. But out in this gray wasteland, scientists conducted a brave 24-hour study: They dropped pocket gophers into the blast zone. More than 40 years later, this brief intervention produced stunning results, and the rodent is credited with reigniting ecological restoration. By churning up the volcanic crust, underground rodents push much-needed nutrients and symbiotic fungi to the surface. These “ecosystem engineers” are now credited with accelerating the recovery of forests from the once barren lunar landscape to the biologically rich habitats they are today. The secret to their success lies in collaboration between animal behavior and soil microbiology.

43 years ago, scientists released gophers at Mount St. Helens to rebuild devastated ecosystem

In 1980, researchers including Dr. Charlie Crisafulli and Dr. James MacMahon flew northern kangaroos (Thomomys talpoides) to the Pumice Plains, according to the UC Riverside School of Natural and Agricultural Sciences. Researchers kept pocket gophers in enclosures and observed their digging behavior for just 24 hours. By moving old, nutrient-rich soil into and over the new sterile volcanic soil, pocket gophers help “re-inoculate” the sterile substrate with beneficial organisms. Six years after the intervention, plots with gophers were filled with more than 40,000 plants, while plots that had not been affected and had no gopher activity had almost nothing.

role Mycorrhizal fungi in volcano soil fertility

The reason pocket gophers are so successful at creating habitat for plants is their role as vectors of mycorrhizal fungi. Mycorrhizal fungi have a mutualistic relationship with the roots of more than 90 percent of plants, but as a journal article published in Nature points out, without this organism to help facilitate nutrient and water uptake from the environment, most plants would struggle to grow in alpine habitats. cutting edge. Explosions from volcanic eruptions buried soil under volcanic ash (ash and rock), but the pocket gophers’ digging allowed fungal spores, as well as beneficial bacteria, to reach the surface, affecting vegetation growth. In 2024, a study analyzing the long-term experiment reported that areas affected by pocket gophers had better fungal networks 43 years after their introduction than similar areas not affected by pocket gophers.

How Barrows Rebuild Soil Structure

Pocket gophers are a classic example of “ecosystem engineers,” organisms that can manipulate their surroundings for the benefit of others. Pocket gophers create burrows that provide suitable conditions for other species and also help increase aeration and infiltration of water in volcanic soils. Data collected over many years show that even short-term biological interventions can determine habitat structure for nearly half a century. Their activity leads to the establishment of complex plant communities much faster than natural processes.