This dataset provides chironomid percent-abundance data for an Early Weichselian sediment sequence retrieved from the Nochten mine (Niederlausitz area, Germany) in 2004. Percent-abundances of individual chironomid taxa are presented against relative core depth (m). The lake deposit was encountered in an exposure of Weichselian sediments and was sampled using a box core. The material was dated to the Early Weichselian (ca 80ka BP) using a combination of OSL and 14C dating. A total of 13 samples were analysed for their chironomid content. Samples were taken from the box core, weighted, and subsequently processed in the laboratory (Vrije Universiteit Amsterdam, the Netherlands) using standard protocols – this involved 20min treatment with warm KOH (10%) and sieving over a 100µm mesh. Chironomid head capsules were subsequently handpicked from the residue, mounted on permanent microscope slides, and identified using the literature. This dataset provides chironomid percent-abundances relative to the total count of chironomid head capsules per sample. The chironomid dataset provides insight in the natural evolution of the lake ecosystem and was used to produce a chironomid-inferred July air temperature record.
This dataset provides chironomid abundance data for a Mid Weichselian sediment sequence retrieved from the Reichwalde mine situated in the Niederlausitz area (Germany) in 1999. Percent-abundances of individual chironomid taxa are presented against relative core depth (m). The lake deposit was encountered in an exposure of Weichselian sediments and was sampled using a box core. The material was dated to the early Mid Weichselian (ca 50ka BP) using 14C dating. A total of 18 samples were analysed for their chironomid content. Samples were taken from the box core, weighted, and subsequently processed in the laboratory (Vrije Universiteit Amsterdam, the Netherlands) using standard protocols - this involved 20min treatment with warm KOH (10%) and sieving over a 100µm mesh. Chironomid head capsules were subsequently handpicked from the residue, mounted on permanent microscope slides, and identified using the literature. This dataset provides chironomid percent-abundances relative to the total count of chironomid head capsules per sample. The chironomid dataset provides insight in the natural evolution of the lake ecosystem and was used to produce a chironomid-inferred July air temperature record.
Etude de la composition faunistique des larves de Chironomides (dipteres) des lacs de Suisse romande, de la repartition bathymetrique, de l'evolution des peuplements depuis le debut du siecle et de l'utilisation de ces larves comme bioindicateurs. (FRA)
'- Study of relationship between climate records for mountain weather stations with those for lowland stations, - assessment of the physical, chemical, and biological seasonal variabbility of non-polluted remote lakes by intensive sampling and analysis - study of the relationship between the distribution of the primary biological constituents of mountain lake ecosystems that form the most important groups in the sediment cores (i.e. diatoms. chrysophytes, cladocera, chironomids and measured environmental summary variables, - study underlying trends and natural variability in climate from the fine-detail analysis of the uppermost sediment (last 200 years), - comparison of the sediment record with instrumental records of temperature and precipitation, - calibrate and validate the DYRESM and AQUASIM models and run these models using alternative scenarios for future climate.