Category Archives: Food

Almost half of Britain’s natural biodiversity has disappeared.

Report in the Guardian newspaper:- ” Almost half of Britain’s natural biodiversity has disappeared over the centuries, with farming and urban spread triggered by the industrial and agricultural revolutions being blamed as major factors for this loss.

Britain has lost more of its natural biodiversity than almost anywhere else in western Europe, the most of all the G7 nations and more than many other nations such as China,

The world’s overall biodiversity intactness is estimated at 75%, which is significantly lower than the 90% average considered to be a safe limit for ensuring the planet does not tip into an ecological recession that could result in widespread starvation. On this scale, the UK’s index reading was 53%.”

https://www.theguardian.com/environment/2021/oct/10/nearly-half-of-britains-biodiversity-has-gone-since-industrial-revolution

Why do we need insects?

  1. To pollinate 87% of plants. 75% crops need insect pollination.
  2. Recycle dung, leaves, corpses.
  3. Keep soils healthy.
  4. Control pests, though they can also be pests.
  5. Food for larger animals eg. fish. Crickets are 12 times more efficient than cows in converting vegetation into digestible body mass, produce little or no methane and use 55 times less water.
  6. Insects are in all food chains.

Problems –

German nature reserve studies – over 27 years the insect biomass has dropped by 75%. Forest and grassland had a 40% drop over 10 years.
UK butterflies – over 41 years a 46% drop in common species numbers. 77% drop in rare species numbers.
US studies – 70% drop in insectivorous birds in 20 years.

Source:- Dave Goulson “Silent Earth” 2021

Loss of bees causes crop shortage

A Guardian newspaper report:-

“A lack of bees in agricultural areas is limiting the supply of some food crops, a new US-based study has found, suggesting that declines in the pollinators may have serious ramifications for global food security.

Species of wild bees, such as bumblebees, are suffering from a loss of flowering habitat, the use of toxic pesticides and, increasingly, the climate crisis. Managed honeybees, meanwhile, are tended to by beekeepers, but have still been assailed by disease, leading to concerns that the three-quarters of the world’s food crops dependent upon pollinators could falter due to a lack of bees.

Of seven studied crops grown in 13 states across America, five showed evidence that a lack of bees is hampering the amount of food that can be grown, including apples, blueberries and cherries. A total of 131 crop fields were surveyed for bee activity and crop abundance by a coalition of scientists from the US, Canada and Sweden.  …. ”

Read more :-

https://www.theguardian.com/environment/2020/jul/29/bees-food-crops-shortage-study

https://royalsocietypublishing.org/doi/10.1098/rspb.2020.0922


 

Moths have ‘secret role’ as crucial pollinators

BBC Report:-   “Dr Walton from University College London and colleagues monitored moth activity around ponds in agricultural areas of Norfolk.

They found that 45% of the moths they tested were transporting pollen, which originated from 47 different plant species, including several that were rarely visited by bees, hoverflies and butterflies.

The scientists found that while bumblebees and honeybees are critically important, they tended to target the most prolific nectar and pollen sources. Not so with moths.

“From what we see from our work, moths tend to be generalists, meaning they’re not specifically visiting a narrow group of flowers,” said Dr Walton. … ”

https://www.bbc.co.uk/news/science-environment-52630991

https://royalsocietypublishing.org/doi/10.1098/rsbl.2019.0877

Buy organic to help curb global insect collapse.

A Guardian newspaper article ,,,  “Buying organic food is among the actions people can take to curb the global decline in insects, according to leading scientists. Urging political action to slash pesticide use on conventional farms is another, say environmentalists.”

https://www.theguardian.com/environment/2019/feb/13/buy-organic-food-to-help-curb-global-insect-collapse-say-scientists