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Vädret på Station Linné

Station Linné har en unik väderstatistik som sträcker sig ända tillbaka till 1964. Uppgifterna i statistiken omfattar flera parametrar, som t ex nederbörd, vind, mark- och lufttemperatur.

För Station Linnés gästforskare ingår detta som en extraresurs. Övriga kan köpa nämnda väderdata för en engångsavgift på 1 500:- och sedan 300:-/månad som önskas. Kontakta oss gärna så berättar vi mer.

The Gall Midge Project... goes on!


Period: 2015–2017
Funding: ArtDatabanken Sweden (3,180,000 SEK)
Project leader: Dr Mathias Jaschhof
Other personnel: Catrin Jaschhof 

 

Why Gall Midges? Cecidomyiidae (gall midges), one of the most biodiverse families of the order Diptera (two-winged insects), contain more than 6,200 described species—mostly plant-feeders, but also fungus-feeders and predators. Cecidomyiids are abundant and ubiquitous in terrestrial ecosystems worldwide. Even so, due to their small size and other difficulties in studying them, they have never attracted much research interest by dipterist-taxonomists and are thus ranked among the least known dipterans. At present only fragments of the world fauna are known and the number of world species is regarded as inestimable. To illustrate these facts, more than 800 species of gall midges, almost all unknown to science, have recently been found within just 4 hectares of tropical cloud forest!

To present knowledge, the Swedish fauna includes 240 plant-feeding species (classified in the subfamily Cecidomyiinae) and 409 fungus-feeding species (Lestremiinae, Micromyinae, Winnertziinae, and Porricondylinae). Only the fungus-feeders are well documented, thanks to two previous projects funded by ArtDatabanken. There are indications that the Swedish fauna actually comprises more than twice as many species as currently known, i.e. 500–600 plant-feeders, 500–600 fungus-feeders, and 100 predators. So there is still a long way to go before we may regard the Swedish Cecidomyiidae as adequately inventoried!

The Gall Midge Project, designed to closing this gap of faunistic and taxonomic knowledge, aims at the identification and documentation of 300+ species new to Sweden and 60+ species new to science. Specimens to study come from the rich Cecidomyiidae material generated by the Swedish Malaise Trap Project as well as from fresh collections (to be made in the course of the project) in Öland, Gotland, and several carefully selected sites on the Swedish mainland. The identification and classification of species will be based on both morphological and molecular evidence. Relevant results, such as new taxa, generic revisions, and identification keys, will be published in peer-reviewed journals, and voucher specimens will be deposited in the Naturhistoriska Riksmuseet Stockholm.

 

Why Station Linné? The Station is the ideal base for studying the biodiversity and taxonomy of Swedish Cecidomyiidae: it ensures closest distance to the Swedish Malaise Trap Project, which is a major source of study material; it provides an adequate environment for rearing gall midges from infested plant material, as the Station maintains a greenhouse facility; and it allows for short distances to the envisaged collecting sites. Moreover, Station Linné is adequately equipped for morpho-taxonomic research, and some of its employees are themselves actively involved in biodiversity research. Altogether, all the Station breathes the animating spirit of discovery.

 

Who is funding this research? The Gall Midge Project is a subproject of, and funded by The Swedish Taxonomy Initiative (STI), which strives to inventory all the multicellular fauna and flora of Sweden. Of 50,000–60,000 multicellular species estimated to occur in Sweden, up to 1,300 might be gall midges. Being an ambitious and unique endeavour in biodiversity research in general, STI has performed as one of the major supporters of particularly cecidomyiid research for many years now. In fact, STI means far more than a regional enterprise for the study of gall midges, especially fungus-feeders. Nowhere else on the planet are fungus-feeding cecidomyiids so intensively studied as in Sweden—thanks to STI.

Figure 1: This is one of three Malaise traps that collected specimens for the Gall Midge Project in Grytsjön Nature Reserve near Bäckebo, Småland, in 2014. Note the abundance of dead aspen and birch wood on the forest floor: the perfect habitat for fungus-feeding gall midges.
Figure 2: One of the objects of desire: the gall midge Clinorhytis flavitarsis, described and named by the French reverend Kieffer, in 1896. This species was rediscovered only in the mid-1980s in Latvia and Ukraine, and first recorded in Sweden in 2010. With a body length of 5 mm it is a large member of the gall midge family.