Tag Archives: biogeography

Burning Desires and Incendiary Thoughts

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Horseshoe Two Fire, Chiricahuas

Hot winds batter the landscape, sucking whatever moisture they can coax from desiccated plants.  Record-breaking temperatures challenge the survival skills of wildlife, as they and we wait for the merciful monsoonal rains, should they come in a month.  We wait and watch, knowing that the first plume of smoke to rise skyward could create a blazing inferno defying our feeble but expensive efforts to limit the damage.

Arizona has endured droughts and heat waves before, but there are strong signs that human activities are exacerbating the challenges faced by the more-than-human world.   The summer of 2011 saw huge tracts of forest burn up in the Southwest.  I witnessed the dramatic Horseshoe Two Fire in the Chiricahuas, but in a summer of exceptional fires in both Arizona and New Mexico, that one was just the tip of the melting iceberg.  That was the summer of the Wallow Fire in Arizona (largest in history), the Conchos Fire in New Mexico (also the largest recorded there), the Monument Fire in the Huachucas (which consumed the home and irreplaceable insect collections of one of my friends), and many fires in northern Mexico, where suppression was not even attempted.  More than 2.1 million acres burned, over twice the previous record set in 2006 for these two states.  Megafires.  Unprecedented.  Shocking. Continue reading →

Where do Toe-biters go when it Rains?

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Where Do Toe-biters Go When It Rains?

Floodbug

Curiosity is a well-known field mark of a naturalist, and I have learned to indulge my curiosity when an opportunity arises.  Some years ago, I stayed with friends in the Chiricahua Mountains of SE Arizona, one of the dramatic “sky islands” of the Southwest.  Back in the cooler, wetter Pleistocene, the forests marched across the valleys, allowing free commerce for animals and plants among the ranges.  As conditions warmed and dried, the forests retreated to higher elevations, trapping survivors on habitat islands.  Continue reading →

When Resignation Means Renewal

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Autumn light, Granite Creek

A blustery stranger arrived unannounced on Friday.  The day dawned clear like so many others.  By 11 as I drove home from the college for a quick lunch, the unexpected guest had arrived, leaving the door open so that its forceful breath whipped up whitecaps on Watson Lake.  Dust and leaves swirled in its powerful exhalations.  Low clouds streamed over the rounded crests of the Bradshaw Mountains.  Winter had suddenly returned to Arizona.    Continue reading →

Megadiversity of Moths

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Oculea Moth up close. Photo by Quill Anderson

The scene:  The Madrean Sky Islands, an archipelago of dozens of mountain ranges that unify the spirits of the Rockies and the Sierra Madre, the Sonoran and Chihuahuan Deserts.  This is a land of astonishing diversity by almost any measure.  The following story is based on a visit more than a decade ago to the Ash Canyon property of Noel McFarland in the SE part of the Huachucas, a range noted for abundant and varied birds, mammals, and reptiles.

But birds, mammals, and herps are not why I came to see Noel McFarland.  He is a collector of diversity with a twist all his own.  McFarland knows moths.  I follow him through several rooms where he works.  Noel collects more than moths, it seems, and twenty years’ accumulation of boxes, books, papers, and other memorabilia fills his spaces the way floral diversity fills a rainforest.  Continue reading →

Deepening the Time Scale: A Puzzle in Sycamore Canyon

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Though each organism is inherently a time traveler, its genes a partial chronicle of its evolutionary history, we may be the sole species to be able to reflect on that deeper history.  People with deep imaginations can visualize the ape in our behaviors, the prototypical vertebrate in our embryos, the symbiotic merger reflected in our mitochondria.  Some can look at a hillside and envision it as a product of tectonic upheavals, erosional incisions and depositions, the lithification that turned sediment into rock that has weathered into a substrate supporting juniper, cactus, and spiny lizard.  With some training, there is hope for those of us who don’t normally see so well.  Our temporal blinders may be lifted, our spirits uplifted by the joys of discovery and insight.  Informed imagination – that greatest of time machines – can take us further toward understanding the Sky Islands than mere physical descriptions ever will.  Join me, then, for a little time travel, not to see it all (who has time?), but for a sample of how informed imagination works.            Continue reading →