Insectageddon means we are buggered

It was one of those throw-away remarks that stick in the mind. I was at Middlebury College in June when somebody at dinner said, “Funny, I saw more deer on the journey here than insects splattered on my windshield.” He had driven 200 miles through farmlands to Vermont.

It reminded me of a 75% decline of insect populations over the past thirty years in German nature reserves. The news might be welcome if they were only the biting and stinging kinds, but the list included butterflies, wild bees, and dragonflies. The survey was more striking for being in nature reserves! Unfortunately, they are not strictly reserved for nature because pesticides drift from nearby fields, and climate is shifting everywhere. There are also reports that insects are less common in Spain and Britain, and that reminds me of struggles to keep honey bees here in Virginia.

Mountain mint

Discouraged by the loss of two colonies last year, I put my labor into growing more pollinator-friendly plants instead. Mountain mint is currently my favorite. I am happy to see this native plant gradually invade fallow areas of garden because it competes against Japanese stiltgrass that smothers the ground and is inedible to browsing rabbits and deer. The mint has a pleasing odor to attract hundreds of pollinators of many kinds, including bee visitors from an unknown apiary.

I doubt there are many homeowners in the district who are trying to attract bugs. If neighbors knew they might restock their sprays and give their chemical lawns and flower borders an extra coating of toxins to ensure they are sterile. Bugs have few friends, although we make exceptions of butterflies, bees and a few others.

On May 28 the city of Williamsburg recommended a service to residents for fogging their yards, and encouraged the battle by playing up the risk of Zika, malaria, West Nile virus, and Yellow Fever. You might imagine from the announcement we live in a tropical swamp! Meanwhile the US military conducts aerial spraying of its land, sending local beekeepers scurrying to cover their hives. Sprays are no respecters of species; they kill beneficial insects along with mosquitoes.

And yet I hear people ask why friendly insects are less common than in the past. And they wonder about fewer garden birds, bats, and frogs too. Perhaps we can’t have the good without the bad. I will tolerate some bites and stings for the sake of biodiversity, but then what are they to a beekeeper?

It matters if we are facing ‘Insectageddon’ because, at halfway down the food pyramid, many insects provide pollination services. Others eat invertebrates below and/ or provide food for animals and birds above. The environmental writer-activist at the Guardian George Monbiot believes the disappearance of insects caused by modern farming practices and the industrial vacuuming of marine life pose the two greatest existential threats to life on the planet, greater even than climate warming. An alarming warning by Harvard ecologist E.O. Wilson has gone viral: “If all mankind were to disappear, the world would regenerate back to the rich state of equilibrium that existed ten thousand years ago. If insects were to vanish, the environment would collapse into chaos.”

Getting public attention on bugs is an uphill struggle, except to eliminate them. Since people left farming in droves in the last century for sterile condominiums in cities there are fewer people who notice a difference in the air. And even professional ecologists are more detached from nature if they spend time nerdishly in front of screens. That’s why we need more citizen scientists in the community, those amateurs whose passion takes them outdoors to record observations like naturalists of yore.

For my part, I only have anecdotal stories as a gardener-naturalist, not the quantitative data needed to monitor historical changes in insect populations. I notice fewer fireflies and butterflies in my backyard than 17 years ago. What was then semi-rural is now semi-urban, with all that implies.

But when I took an evening drive last month along country roads in the Allegheny Mountains of West Virginia I had an experience I used to take for granted, and the memory came back as a jolt. It was like driving through lightly falling snow. The landscape was filled with moths. Is it a coincidence that the area is thinly populated and old farms that fell on hard times have become fallow meadows? By the time I reached home my car was splattered, and I realized it was something to celebrate instead of grumble. It suggested a new project for amateur naturalists to monitor insects from the comfort of their driving seat. The only effort required will be to wipe license plates clean of corpses after recording data in mph (moths per hour).

About Roger Gosden

British-born scientist specializing in human and animal reproduction & embryology. Academic career spanned from Cambridge and Edinburgh to McGill and Cornell's Weill Medical College in Manhattan where he was Professor & Research Director. Married to Lucinda Veeck Gosden, embryologist for the first successful IVF team in America, he retired early to Williamsburg, Virginia, to write and to recover from 'nature deficit disorder'
This entry was posted in Animalia, Bee-line, Environment, Nature and tagged , , , , , , , . Bookmark the permalink.