Первый слайд презентации: COLEOPTERA
Saint-Petersburg State University Institute of Earth sciences CORELIS Saint-Petersburg 2018 Volkova D.D, student of 1 master course
Слайд 2: Subject
Coleopteran - any member of the insect order Coleoptera, consisting of the beetles and weevils. It is the largest order of insects.
Слайд 3: Type of sediments
Generally coleopteras yield more terrestrial than aquatic specimens. This is probably due to a combination of factors, including greater species diversity in terrestrial habitats, and the concentration of wind-blown specimens in catchment basins. The ground beatle, showing parts of exoskeleton commonly used for fossil indication
Слайд 4: Time period
The remains of beetles are often abundant and well-preserved in Quaternary lacustrine sediments.
Слайд 5: What could be defined
- ancient substrates - water temperature - air temperature - regional vegetation (both aquatic and terrestrial ) - sensitive to the trophic status and pH of the water
Слайд 6: Reconstructions
The principal method of paleotemperature estimation from fossil beetle MCR method (Atkinson et al., 1986). Geographical overlap method (Atkinson et al., 1986). R egional examples from Europe serve to illustrate the quality and kinds of paleoenvironmental reconstructions that have been drawn from fossil insect assemblages from lake sediments.