The biggest news story in the world would be its end.
So is the end of the world nigh? No is the short and reassuring answer.
It is about 5 billion years before the sun turns into a red giant and consumes the planet and before then, perhaps 1 billion years or so, the sun will have increased its radiation levels enough to evaporate the oceans on earth. Homo sapiens will be long gone before then so no worries there either.
|Careful observation of the fossil record suggests that a typical mammal species persists for about 1 million years, although it can be as long as 10 million years. Suppose that Homo sapiens makes it as an outlier it would mean we have roughly 9,650,000 years to go. Even as an average mammal we have 650,000 years to go, more than enough time to figure out how to mess up other planets.|
So the world will end but not anytime soon and even then we will not be around. Not such big news then, the end of the world, unless it comes early.
Is the world changing? Yes and a lot faster than is healthy for human beings. But we know this already, there is no need to keep banging on about how different it was in Grandad’s day. Change is a given.
Only the changes we are seeing are big news, at least they should be.
A year ago I posted a comment on a truly scary percentage; namely the 75% decline in the biomass of flying insects in Europe.
And whilst I know that fewer yucky critters in the world might sound wonderful; picnics in the park without flies, moonlit strolls on the beach without sandflies, barbecues without mozzies and oh the joy of not getting stung by a wasp or bitten by an ant… surely these are all benefits to send us into rapture.
Well yes, some activities will be more pleasant for us.
Farmers are less upbeat.
A few things must happen before a crop makes it to the packaging facility. Farmers must prepare the ground, plant, nurture the plants as the grow, protect them and then harvest the part of the plant that people eat or use. The seed comes in big packets and the seed spreader or direct drilling machine helps the farmer avoid stony ground. He can rely on ever more reliable weather forecasting and turn on the irrigation just at the right time and use growth models to apply fertilizers just when the plants need it. All sophisticated and controlled stuff.
There is one key process that the farmer relies on nature to deliver. Most fruit, vegetable and nut crops (the foods that give us most of our essential vitamins and minerals) do not pollinate themselves, they rely on animals to transfer pollen.
Some greenhouse crops are pollinated by hand. Easy enough but still labour intensive. Outside it’s the flying insects that do the bulk of the heavy lifting. Beekeeping sounds like a honey-making business, but it became that way because bees are great pollinators, especially of fruiting trees and shrubs.
In natural habitats over 80% of the plant species rely on animal pollinators for fertilization.
So the loss of insects should be the biggest news story in the world; just ask the First Dog on the Moon.
Only there is more…
A 75% loss of flying insects is serious business. There will be a direct link to pollination and profitability whenever this happens and the suggestion is that is is a global pattern.
As I write this post I am on the outside deck at home. We are privileged to live in the Blue Mountains of NSW and surrounded by nature I expect a few insects to alight on the screen, perhaps buzz around my ear. Nothing, nada. Same on a recent camping trip to the NSW north coast. Anecdotal but notable for someone with an eye for this kind of thing.
Only there is more.
What if this loss of insects applies to those that live in the soil?
Many of the flying types have larval or pupal life stages in the soil, but there are also plenty of permanent soil dwellers. If worms, mites, springtails, woodlice, millipedes and the many other types of invertebrates in the soil food web have declined by 75% too, then the world will be fine but we are all in serious trouble.
These soil animals are essential to decomposition and nutrient transfer to plant roots as well as much of the physical structure of soil that we recognise as essential for plant growth.
I’ll leave the details for later as this post is already too long but the link between soil biology and soil fertility is established through research and known to every farmer who runs soil through his fingers.
However, we don’t know the extent of soil animal numbers or diversity so it is impossible for us to know if they are in decline.
It should be a Kardashian sized news story if they are.
Nearly 20 years ago I co-authored an article about how to measure the diversity of invertebrates in an academic volume entitled “The other 99% The conservation and Biodiversity of Invertebrates”. Our paper was moot, the ‘yet more’ point here is that most of the non-microbial biodiversity on earth is invertebrate.
There are more species of creepy crawly critters than there are birds, mammals and reptiles put together, and then some.
So if soil animals are in decline in the way that their flying brethren are, then species loss rates are going to be through the roof. Saving the koala will be the least of the conservation issues if we are serious about saving species.
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