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Yuri E. Mikhailov, Dept. of Botany and Forest
Protection, Urals State Forestry-Engineering University,
Yekaterinburg, Russia
Poster Title: Alpine
insects of Northern Eurasia: faunistic connections and history
Poster Abstract: The short history of regular studies of
the insect faunas of the alpine life zone in the Urals and Siberia
as specific units still leaves numerous gaps in our knowledge of
their biodiversity and ecology. This fact and the relatively low
diversity of alpine faunas is compensated by high rate of endemic
and relict forms. Such forms are useful in restoring former
faunistic connections dated back to the glacial period or even
Tertiary. Coleopterans, mostly wingless and limited in
distribution, are the best objects here, especially herbivorous
groups connected with plants. Such species prove well the
subdivision of the alpine vegetation of Northern Eurasia between
the true alpine type and the mountain tundra type. Leaf beetles
show connections between European mountains and Altai-Sayan region
in Siberia while the Urals are mostly connected with the mountains
of Eastern Siberia. The role of the Arctic tundra zonobiome as a
corridor between very distant mountain systems and interrelations
between arctic-alpine insect groups still need further studies.
Glacial tundra-steppe left isolated populations of a few insect
groups and some of them found refuges in the mountains. Several
forms in South Ural and Siberia are related to exact Mediterranean
forms - both used refugia for survival.
The finding of species new to science in the mountains,
clarifying of distributions and ecology of known species are still
in progress and these progressively help to clarify the whole
picture.
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