1838-2018

A few years ago I was part of a team doing an environmental assessment for a local road project.  When I saw these giant bur oaks (all around four-and-a-half feet diameter at breast height), I knew I’d be among the last to see them.

The project drew a lot of opposition from local residents and environmental groups. Alignments changed to avoid certain impacts. Wetlands and listed species are regulated. Oak trees such as these are not. To my knowledge, nobody spoke up specifically for this old grove of trees. Nobody chained themselves against their coarse, four-inch thick bark. Nobody called their representative. These trees fell uneventfully and without resistance.

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1941 and 2018 images of old bur oaks. The four oaks that the arrows follow between the two years were felled in September, 2018 to make way for a new road. The three oaks just to their east remain.

It was an imprecise and difficult task due to the roughness of portions of the cuts, the bees swarming from hollows higher up in the fallen trees, and mosquitoes, but on two different trees I counted approximately 180 rings.

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The air was warm and heavy with the sweet, green smell from the fallen bole and broken limbs.

This grove predated Aldo Leopold’s birth by decades, and his “Good Oak” wouldn’t lay down its first ring-wood before these oaks were making acorns. Passenger pigeons still migrated in the billions.

Today the location where these trees grew is buried deep beneath the grade of a four lane bypass. 

Mourn and ponder this tremendous loss with me.

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Posted in biodiversity, Conservation, Forests, Oak opening, oaks, Savanna, Uncategorized | Tagged , , , , | 1 Comment

Whip-poor-wills

Will whip-poor-wills continue to call from the forest edge behind our house or the aspen grove at the cabin up north for long enough for our son to hear them and remember them, so that he might recount them once they are gone, or will last year be the last year we heard them? Spring has become a time of anticipation, but it’s also a time of trepidation. Our landscape has probably already crossed a threshold that dooms these ridiculous gaping-mawed birds, and my hopes are now centered on the lesser goal of projecting their memory a generation or two deeper into posterity. It occurs to me that many of my peers living in eastern North America have never heard a whip-poor-will. Our grandparents have, if they grew up in the humid East outside of the big cities. This brings me sadness, because the whip-poor-will’s call through the afterlight or pre-dawn spring air is truly an earthly delight.

Why are big, insect-eating birds disappearing? Maybe we’re running low on bugs.

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Conserve Plant Diversity First

At least that’s the message I take from a recent study published in Nature Communications entitled Ecological networks are more sensitive to plant than to animal extinction under climate change.

In particular they found a higher risk of animal co-extinction with plant extinction than vice-versa in mutualist networks. This may be because animals often provide redundant services to plants, and plants have alternative pathways (e.g. self-pollination, parthenogenesis, seed banks, clonality, and/or adult plant longevity) for the reproduction services provided by animals.

While this study used data from Europe in its simulations, the mechanisms invoked should apply to terrestrial ecosystems more generally.

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Many insect pollinators depend on a few species of locally occurring early flowering plants like this small white violet (Viola Macloskeyi). The violet has less at stake. Sure, open pollination is good, but it will follow up on this display by producing inconspicuous closed flowers that self-pollinate (cleistogamous), ensuring a means by which to perpetuate itself regardless of insect visitation.

Posted in biodiversity, Conservation, native plants, Weather and Climate | Tagged | 2 Comments