Analysis of Coleopterans from Late Holocene natural spring deposits in south-central Sweden
2014 (English)In: Quaternary International, ISSN 1040-6182, Vol. 341, 184-194 p.Article in journal (Refereed) Published
The usage history of a natural spring deposit in associated glacial till was investigated via analysis ofcoleopteran remains found in peat. This material was recovered during archaeological excavations in aspring outflow in south central Sweden. The geographical region of southern Sweden has been heavilyaffected by uplift following the terminal glaciation (Weichselian) in Scandinavia, with the study area forthis project having risen above sea level about 1200 BC. The spring was found in connection to thenorthern part of a large settlement and religious area, dating from the Younger Bronze Age and PreRoman Iron Age (1100e300 BC). However, the area has been used for agricultural land up until thepresent day. Sampling was conducted for interpretation of the usage history of the site, with the insectfragments showing exceptional preservation as a result of unusual conditions in the sediments. 14Cdatingfrom the lower to upper part of the spring yielded a stratigraphic range of 670e870 to 660e810AD respectively. A half-circle boulder construction provides clear evidence that the spring was used earlyin prehistory, probably during the Bronze Age, and potentially excavated at irregular periods. Thecoleopteran assemblage was dominated by beetles indicative of open landscapes, grazing land, andforested environments. This closely resembles the vegetation setting of today, in which the spring issituated on the border between arable land and mixed deciduous and coniferous forest. A high frequencyof carabid beetles suggests that the spring may have functioned as a pitfall trap, and correlated well withthe relative inorganic to organic compound composition of the ground conditions. The spring wasprobably abandoned in the late Iron Age (600e800 AD). Identification of two red-listed threatenedspecies that are not present in the current fauna implies that radical change in the agricultural landscapeover the last 1200 years could be negatively affecting diversity dynamics within the local fauna.
Place, publisher, year, edition, pages
Elsevier, 2014. Vol. 341, 184-194 p.
Natural spring, Coleoptera analysis, Late Holocene
Other Earth and Related Environmental Sciences Geology
Research subject Earth Science with specialization in Quaternary Geology
IdentifiersURN: urn:nbn:se:uu:diva-223945DOI: 10.1016/j.quaint.2014.03.035ISI: 000340905800015OAI: oai:DiVA.org:uu-223945DiVA: diva2:714509