Why would a midge influence climate, even if there are billions of them? What I did not read in Wikipedia were recent results of a research by teams of the Universities of Geneva, Swansea and Potsdam. The scientists confirmed that during two years the larvae of Chaoboridae live in muddy pools and ponds preferring eutrophic waters where they will reach densities of up to 130,000 larvae per square meter. They feed on waterflies, springtails, and other mini beasties but only during night hours. During the day the larvae hide from their predators by diving up to 70 meters deep into the muddy bottom of the water.
|Chaoborida larva or glassworm (©Wikipedia)|
|Büschelmücke (Chaoborida). Note the Büschel (tufts) (©Wikipedia)|
Shall the community sponsor further research on Chaoboridae? Here on the Upper Rhine Freiburg's authorities are instead quarrelling about the financing of a campaign against the tiger mosquito. It came in lorries from the south of Europe and hibernated in our region. So globalization paired with climate change is stimulating the Asian mosquito to move farther north spreading angst about new diseases.
|Tiger mosquito (©dpa)|
Why do the Freiburg authorities hesitate to spend 50,000 euros? Well, fighting the tiger mosquito with a chemical mace would result in collateral damage to other insects, but who likes to see the birds starve? In fact, a recent census in Freiburg has shown that the population of birds within the city boundaries has dramatically decreased over the last years, a trend due to a more and more restricted habitat for birds in combination with less food.
Another circulus vitiosus.