Insect Population

Debate between Bill Grant and Alex Sobel

Wednesday 20th March 2019 Westminster Hall

[Alex Sobel]

The hon. Gentleman will be unsurprised to hear that I absolutely agree, and I would like that to be legislated for in the environment Bill, particularly as he lost his piece of legislation on that proviso.

I will move on to ecosystem services. On top of the loss of invertebrates, the loss of species generally means that we do not have a lot of other services, such as natural pest control, natural decomposition of pollutants and natural nutrient cycling. Without those, we will increasingly have to intervene in ecosystems to provide them. A good example is that trees draw carbon down from the atmosphere really well, and have done forever, but because we have lost the part of the ecosystem that does that, we are now talking about engineering artificial means of carbon drawdown.

[Bill Grant (Ayr, Carrick and Cumnock) (Con)]

I am of an age to remember the windshield being covered in insects, and the number plate, which was particularly hard to clean. Does the hon. Gentleman think that initiatives such as the healthy bees plan and the National Bee Unit should be extended to protect other species of insects—or, as we say in Scotland, beasties?

[Alex Sobel]

It is always good to have an intervention about beasties. I absolutely agree with the hon. Gentleman. That harks back to my point about abundance and variety. We cannot protect only the bees, because they will not survive on their own without the abundance and variety of insects.

If we projected existing trends downwards, we would end up solving problems caused by the loss of natural systems one by one, which would be a much less efficient way to solve the problems of ecosystems than treating the root cause of the problems. If we look at the trends over the past 30 years, we see that that means not solving the problems but exacerbating them. The most shocking evidence that the Environmental Audit Committee heard came from Matt Shardlow, who said:

“In Germany, what they are looking at is nature reserves and a long-term decline, a 76% decline in the abundance of flying things on those nature reserves”.

Let that just sink in—a 76% decline in flying insects in nature reserves, not urban environments.

There is so much that English research does not yet know, but researchers looking at the swallowtail butterfly—again, this is the work of Professor Hill—found that as fenland habitats decreased in size, slowly the swallowtail became extinct, but before it became extinct it shrunk in size, because there was no point in it flying away from where it was as it would die anyway, because of urban encroachment. Our habitats are becoming fragile and we need to reverse that trend.

The UK does not have the sort of resilience that is needed to assist insects in weathering the storm of climate change. In a global assessment, the UK came 189th out of 218 countries for “biodiversity intactness”.