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Conservationists and biologists often have a hard time explaining their concepts and concerns to politicians and business leaders: our leaders are frequently motivated by political and economic calculations which seem pretty far removed from the living world. One of the ideas which environmentalists have invented in order to rectify this communications problem is “ecosystem services” the concept that there is a real and calculable use value of living organisms and systems. A famous example right now is bees—which pollinate crops and thus provide immediate tangible value to fruit and vegetable farmers. There are all sorts of fruits, nuts, vegetables, and other crops which would not grow without bees. Some other current examples are wetlands—which filter water and provide a sort of storm safety zone around coasts—or fisheries which provided delicious fish. By putting a pricetag on ecosystems and endangered animals, scientists hope to emphasize to leaders how important conservation is.
Eco what? Yeah, that’s great now run along.
Unfortunately this methodology is prone to all sorts of problems, as was demonstrated by a bee study for Nature Communications which was conducted by a team lead by David Kleijn. The survey set about assessing to what extent economically useful crops are pollinated by wild bees. The authors thus hoped to appraise the ultimate value of the native bees. You can look at the actual paper and draw your own conclusions about their assumptions and methods, but the team concluded that wild bees are immensely valuable—with a worth of about $3,251.00 per hectare of agricultural land.
Thanks, bees!
The team however went further and broke down the economically valuable labor all of the different bees by species. This led them to conclude that only 2% of bee species were contributing in a meaningful way to crop pollination (and this hard-working 2% of wild bees are from species which are actually doing pretty well, and seem unlikely to go extinct). All of the remaining bees were deemed worthless shirkers of no economic use to humankind. The paper seemed to suggest that if they all go extinct it won’t take food off the table or money out of anyone’s pockets.
Hmm…
What? Are David Kleijn and his team dangerous hyper-rationalists who belong in an Ayn Rand book? Regular readers of this blog will already be wondering about these conclusions. Aren’t parasitoid wasps critical to protecting crops? What ecological niche do the allegedly valueless species take up? What happens if they die off and there are horrifying consequences which the ecologists, agricultural scientists, and theorists never anticipated? Indeed we have seem such things happen again and again—like Australia’s rabbits or these accursed crown-of-thorns starfish. Life is a web and when you start removing strands the entire edifice begins to flip around and malfunction in unexpected ways.
In fact I believe the paper might be designed to poke some critical holes in the irrational nature of purely economic cost/benefit calculations. The introductory paragraphs seem calculated to stir up the media into asking some important questions about this kind of thinking (and, of course, the paper is also designed to give a PR boost to David Kleijn and co.). However, the fact that the results may have been designed to stir up controversy does not make the fundamental questions less valid. The fundamental calculus behind ecosystem services as a policy tool is inadequate. But what else can we use in a world of ever-growing population and ever-diminishing resources?
Sad news from America’s apiculturists: nearly a third of domestic bees in the United States did not survive the winter of 2012/2013. Before 2005 the winter loss rate was between 5% and 10%, but after that year, colony collapse disorder, a mysterious affliction which caused domestic bees to fly away and never return, ravaged the poor honeybees. Losses of 30% became common. Beekeepers were somewhat hopeful that the worst of the scourge was passing after the winter of 2011/2012 (when losses fell to 22%) however apparently that year was anomalous. At least it seems that this winter’s losses were not the result of classic colony collapse disorder–rather than flying away to nowhere the bees stayed put in their hives. Yet the insects they were sadly weakened and diminished and the attenuated hives proved unable to start new broods in the spring and just withered away.
WHY? (No seriously–why?)
This is a huge and perplexing problem. At least a third of our food supply is dependent on the hard-working yellow and black pollinators. Hundreds of billions of dollars are at stake—as are our favorite fruits, vegetables, and nuts. This past year a number of studies indicated that neonicotinoid insecticides were partly to blame for bee losses (along with vampiric varroa mites, a decline of wild flowering plants, greedy beekeepers who overextend their hives, and a bacterial disease horrifyingly named “European foulbrood”) but the compounds are non-toxic to other animals and immensely lucrative to big chemical companies. In Europe the compounds were banned this year, so comparing European bee hives with American ones in coming years should at least help us understand the problem.
Some scientists have also suggested that a lack of genetic diversity in domestic bee populations is also contributing to the problem. Maybe we need to go online and find some new life partners from around the globe for our hymenopteran friends. The infamous Africanized killer bees seem like they have some immunity to some of the issues behind bee die-offs. Maybe we need to come up with a better name for those guys and see what they are up to this summer.
Sigh…so, um, what do you gentlemen do?
ferrebeekeeper 