Sequoia

European awareness of giant sequoias began in 1852, when a hunter named Augustus Dowd stumbled into a grove near the Calaveras River while chasing a wounded bear. The trees he described seemed impossible to people who had never seen them. Newspapers called them a hoax. Within a year, expeditions had confirmed their existence, and within two, the first sequoias had been cut down for bark exhibitions that toured Eastern cities. One tree, dubbed the Mother of the Forest, was stripped of its bark in sections that were reassembled in New York as a demonstration specimen. The tree itself died.

That exhibition was the beginning of roughly sixty years in which sequoias and coast redwoods were logged at industrial scale. The wood turned out to be, relative to expectations, commercially disappointing — it was soft, brittle, and often shattered when trees fell. Giant sequoias in particular tended to break into pieces on impact, wasting much of their volume. But the scale of the trees meant that even half-usable timber produced enormous amounts of lumber, and the logging industry of northern and central California was soon cutting the oldest, biggest trees at a rate that would have exhausted the species within a few decades.

For most of the twentieth century, the sequoia conservation story was told as a clean victory. The big trees were saved; the groves were protected; the parks were visited by millions every year. The story was about rescuing individual trees from commercial destruction, and on that metric the story worked. What it didn't account for was the second order problem — what happens to a fire-dependent species when you put fire management around it.

Throughout the twentieth century, the National Park Service and the Forest Service aggressively suppressed all fires in sequoia groves. This was the received ecological wisdom of the era — fire was bad, fire destroyed forests, fire had to be stopped. In practice, a century of fire suppression meant that sequoia cones weren't opening, seedlings weren't germinating, and fuel loads on the forest floor were accumulating to levels the ecosystem had never seen before. By the 1960s, researchers were noticing that new sequoias weren't establishing. The existing giants were doing fine. There were no replacements.

The sequoia is a useful case for thinking about deep time and the limits of human perception. We evolved to operate on timescales measured in seasons and generations. The sequoia operates on a timescale measured in millennia. Standing under a 2,500-year-old tree does a thing to one's sense of duration that almost nothing else in ordinary experience does — it makes the span of one human life feel very small, and it makes the span of civilizations feel less stable than usual. The tree's presence is a physical reminder that there are living things for which most of recorded human history is a brief window.

It is also a useful case for thinking about what it means to be an individual versus a species. A single giant sequoia, standing alone in a clearing, will die. Its root system is too shallow, its lifespan too long, its reproductive cycle too dependent on fire and soil conditions. What survives deep time is not the individual tree but the grove — the fused root systems, the cone storage across multiple trees, the genetic population spread across slopes and river valleys. The sequoia is as much a collective organism as an individual one. Its deep-time survival depends on the network.

Eighty individual sequoias alive today were seedlings when Jesus was born. General Sherman has been alive for 2,200 years. In the last three years, thirteen to nineteen percent of all giant sequoias on Earth have been killed by fires that a century of well-intended fire suppression made possible. The species is older than every human institution and more fragile than any of them.