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Loss of intensity and diversity of noises in ecosystems reflects an alarming decline in healthy biodiversity, say sound ecologists
Sounds of the natural world are rapidly falling silent and will become “acoustic fossils” without urgent action to halt environmental destruction, international experts have warned.
As technology develops, sound has become an increasingly important way of measuring the health and biodiversity of ecosystems: our forests, soils and oceans all produce their own acoustic signatures. Scientists who use ecoacoustics to measure habitats and species say that quiet is falling across thousands of habitats, as the planet witnesses extraordinary losses in the density and variety of species. Disappearing or losing volume along with them are many familiar sounds: the morning calls of birds, rustle of mammals through undergrowth and summer hum of insects.
Today, tuning into some ecosystems reveals a “deathly silence”, said Prof Steve Simpson from the University of Bristol. “It is that race against time – we’ve only just discovered that they make such sounds, and yet we hear the sound disappearing.”
“The changes are profound. And they are happening everywhere,” said US soundscape recordist Bernie Krause, who has taken more than 5,000 hours of recordings from seven continents over the past 55 years. He estimates that 70% of his archive is from habitats that no longer exist.
Recently I’ve found that I often get sad listening to wildlife. I’ve got a sense that a lot of what I’ve seen and heard is very soon to be gone. Not like in 1000 years in some hard to imagine future, but rather maybe within my own lifetime. I’m mourning for a dying world.
I sometimes think about this story about a recording of a now extinct bird; and I remember that there are stacks of other examples of species that have recently gone extinct. Too many for people to even talk about each of them. Just a few nice-sounding high-profile cases capture people’s attention every so often.
I do put in a bit of effort in my own lifestyle to not make things worse. But it seems to me that there will be vast damage to the world already before humanity course corrects appropriately. It’s very depressing.
Yeah, me too. I read articles like this and just cry inside (and maybe a little outside) because we are watching our world’s ruin in slow motion, and it seems like so few care. Certainly not enough people care to make changes happen on the scale we need.