The importance of Honeybees
“Through their pollination of crop plants honey bees are the third most valuable domestic animal in Europe” - Jurgen Tautz.
Honeybees and the world
The official version
Honeybees are vital to humans and flowering plants. A little honey is used as medicine, lip salves, polishing furniture, and candles. However, the essential beneficial role of honeybees is pollination. Honey’s global trade is significant (1) Our lives depend on honeybees.
The apocryphal version
Bees are irrelevant to most farmers and essential for a few. Whilst bees’ pollination services are crucial, so is the role of managed bumble bees, leaf-cutter bees and other pollinators. Honeybees pass germs to other arthropods, which almost certainly contribute to insect decline. Also, bees are so efficient they can out-compete other pollinators. Nectar at any site is a free but finite commodity. How can we avoid extracting too much? You won’t notice any obvious signs if you do.
Some Trade Figures
Assuming a world population of 8 billion:
Global annual primary crop commodities (2021) was 9.5 billion tonnes => 1.18 tonnes/person (think waste & meat production).
Global annual honey production (2022) was 1.83 million tonnes (about £2.28/person).
Crop pollination - Borage. © Crown copyright
Examine the pictures below. Many of our foodstuffs depend on pollinators, but our staples don’t.
Many flowering plants self-pollinate like field beans, but cross-pollination produces a larger crop. Other crops, such as cocoa and date palms, require wild pollinators; some crops, such as strawberries, benefit from bumble bees and honey bees. So, a plant’s requirements for honeybee pollination can be hazy.
Crops that need Honey bees
-
Carbohydrates - NO
Corn: wheat, oats and barley
Sorghum
Yams - Cassava
Potato, Maize
Rice, Millet
Lentils, Quinoa
-
Fats and oil - Some
Oil Seed Rape - somewhat
Linseed - no
Sunflowers - yes
Olives - no
Palm oil - no
Avocados - somewhat
-
Protein - Rarely
Pigs and chickens
Alfalfa - Yes.
Grass
Fish
Feed - Corn, Soya/Beans
-
Nuts - somewhat
Hazel - no
Walnut - no
Cashew - no
Brazil - no
Almonds YES!
cocoa - no
-
Vegetables - little
Seed production - YES
beans - somewhat
peas - no
Coffee - somewhat
-
Cucurbita - somewhat
Cucumber (outdoors only)
pumpkins
squash
melons
-
Fruits- mostly YES
Apples
Pears
raspberries
Strawberries
coffee
etc.
-
Legumes - no/some
Most beans
French, runner
Field beans
peas & peanuts
soya
Alfalfa - yes
-
Flowers
? 50%
Conclusion
Honeybees have a small role in providing us with energy rich foods. However, they give us a varied diet.
Honey bees - pros and cons
To avoid confusion, “bee” should always be prefixed by a qualifier, e.g., bumble, solitary, honey. The default meaning of “bee” on this site is honeybee. For scientists, it makes more sense to place a space between the honey and bee; I fancy being a bit of both.
This section could help a school project. It’s a bit of a list, so I’ll forgive you if you hop down the headings.
Honeybees enable monocultures
Only honeybees can provide the massive bursts of pollinators that crops require. Almond growers are entirely dependent on honey bees.
Honey enables a more varied, less healthy, more enjoyable diet.
High-intensity beekeeping negatively impacts wild pollinators.
Any sentiment that managed bees are “good” is suspect from the start. Man upsets the natural balance wherever he lives. Pumping hoards of honeybees into the environment is not natural.
Research in Tenerife found that honey bees shared nectar sources with wild pollinators until the colony populations expanded for the main flow when they almost entirely monopolised it.
Beekeeping “impairs pollination services by wild pollinators by reducing the reproductive success of those plant species highly visited by honeybees. High-density beekeeping in natural areas appears to have lasting, more serious negative impacts on biodiversity than was previously assumed...." Valido et al.
Due to man, honeybees are the most common pollinators in natural habitats
In one study, “they averaged 13% of floral visits across all networks (range 0–85%), with 5% of plant species recorded as being exclusively visited by A. mellifera. For 33% of the networks and 49% of plant species, A. mellifera visitation was never observed. ” Keng-Lou James Hung et al. discuss the complexity of the interaction between bees, plants, and other pollinators.
We could manage if there were few honeybees, so long as the change was gradual.
Some people contest this. However, with suitable habitat provision and a variety of crops rather than monocultures, wild pollinators could do the work of honeybees. The caveat is that only honey bees can provide bursts of pollinators early in the season. Entirely self-fertile fruit like Granny Smith, Braeburn apples and conference pears would still be available. There are self-fertile varieties of Almonds, Chestnuts and Cob nuts
“For one of every three bites you eat, you should thank a bee, butterfly, bat, bird, or other pollinator.” No! It depends on your diet!
Note that honeybees are not the only animal pollinators mentioned here. Various iterations are widely cited. The following version was produced to gain a better perspective: “Out of the 115 crops studied, 87 depend to some degree upon animal pollination, accounting for one-third of crop production globally. Of those crops, 13 rely entirely upon animal pollinators, 30 are greatly dependent, and 27 are moderately dependent.” This version has not caught on! If only people would listen, we could put a stake in the heart of this misinformation, at least in America, May Baumhaun explains.
The numbers depicting how vital pollinators are for crops vary from 30 - 84%.
Hannah Ritchie explains: The figures say nothing about the nutritional content of foods and how much they are included in our diet. Imagine the diet of people living on less than two dollars a day compared with healthy Mormons.
Somehow, a belief that we need to save honey bees is perpetuated in the UK.
Beekeepers have been happy to ride the wave. Britain's current number of honey bee hives is the same as in 1956.
“So the answer to the question, ‘Have honey bees declined in Britain?’ is a resounding NO! …. So, if you want to “Save the Bees” or otherwise support pollinators, please focus on the wild, unmanaged species, e.g., bumble, solitary bees, and hoverflies rather than the managed Western Honeybee." Prof Jeff Ollerton.
@ Prof Ollerton. Hive numbers versus years. The different coloured lines represent data sources.
Note how bees were decimated by the Isle of Wight disease in 1920
9. Disease Spillover
There is circumstantial but compelling evidence that diseases are passed from honey bees to other bees and arthropods. Honeybees may drive wild pollinators to decline, and you’ll never know. Reports are increasing. Review the evidence: look at the diagram below and Antonio Nanetti et al.
10. Bacteria in wounds are destroyed by medical-grade Manuka honey
Besides that proven benefit, a mixture of honey and lemon makes a sore throat feel tolerable.
Berries are extremely dependent on pollinators.
Examples of when Honey bees are reluctant/poor pollinators
Buckwheat produces two types of flowers (pin and thrum) to promote cross-pollination. However, bees predominantly visit the type with the most nectar.
Avocados produce a large number of flowers, which are female one day and male the next.
Alfalfa because bees are averse to being struck forcefully under the head with the stamens of the flowers.
Lists of Pollinators - beware
Although they are mostly correct, lists compiled by people, including me, contain errors. For example, some lists include items potatoes and other carbohydrate staples that are wind-pollinated or propagated vegetatively. Cocoa is high up on the lists. Its natural pollinator, a midge called Theobroma, does a poor job. The flowers are small and complicated; however, after training, wingless humans are very effective pollinators: video demonstration.
Disease spillover - honeybees to arthropods
This diagram shows transmission from Apis mellifera on the right to other species on the left.
We depend on animal pollinators
@ Greenpeace. These pictures demonstrate what would happen with NO animal pollinators - not the absence of honey bees.
Summary
The necessity for honey bees as pollinators depends on agricultural practices and the availability of wild pollinators, and that depends on how humans manage the landscape. Honeybees may give us more than fruits and nuts, but our lives depend on the ecosystem, which relies on a myriad of insects, not honeybees.
Fantastic, spooky dragonfly
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