Schouten, Stan Jonah; Massaferro, Julieta I; Heiri, Oliver; Hächler, Luc; Beffa, Giorgia; Lami, Andrea; Tinner, Willy; Schmidhauser, Noé Raymond Marie Marcel; Vogel, Hendrik; Grosjean, Martin: Chironomid data in Late Glacial sediments, Lago di Mezzano, Central Italy [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.994160 (dataset in review)
Abstract:
This table contains all high-resolution Chironomid data accompanying Schouten et al., 2026 in prep. All analytical data were attained from a sediment core taken in Mezzano (42°36'42'' N, 11°46'12'' E, 452 m.a.s.l.); a small 'maar'-lake (0.5 km2; 31 m deep) lake in Lazio, located in Central Italy. The data was collected to get a comprehensive understanding of the interaction between, anoxia, temperature and total trophic productivity in the timeframe 12 ka BP - 15 ka BP. Data were attained in 2019 and 2020. Sediments were collected using a piston corer in 3m segments (UWITEC - style). The sediment cores were cut in 1m pieces and subsampled. The age-depth relationship is established with a Bayesian model blending 7 14C dates, 3 recalibrated bulk 14C dates, and an ash layer. 6-11 cm3 of wet sediment were treated with 5% KOH and washed through a 200 and 100-µm mesh size sieve. Chironomid head capsules (HC) were picked in a modified Bogorov counting tray under a dissecting microscope at 40× magnification and mounted on permanent slides with Hydro-Matrix® mounting medium. Taxonomic identification was performed under an optical microscope (Carl Zeiss Primo Star iLed) at 400× magnification, A minimum of 50 HC per sample was identified (Heiri and Lotter, 2001), except for two samples from the lowermost part of the core (15.2-14.6 cal ka BP), which contained 23 and 31 HC, respectively. Half of a mentum was counted as one half, and HC with more than half a mentum were counted as one HC. Taxonomic identifications followed Brooks et al. (2007) and Rieradevall and Brooks (2001).
Supplement to:
Schouten, Stan Jonah; Massaferro, Julieta I; Heiri, Oliver; Hächler, Luc; Beffa, Giorgia; Lami, Andrea; Tinner, Willy; Schmidhauser, Noé Raymond Marie Marcel; Vogel, Hendrik; Grosjean, Martin (in review): Late Glacial temperature, anoxia and primary production in Lago di Mezzano Central Italy. Palaeogeography, Palaeoclimatology, Palaeoecology
Related to:
Brooks, Stephen J; Langdon, Pete G; Heiri, Oliver (2007): The Identification and Use of Palaearctic Chironomidae Larvae in Palaeoecology. Quaternary Research Association Technical Guide, 10, 276 pp
References:
Heiri, Oliver; Lotter, André F (2001): Effect of low count sums on quantitative environmental reconstructions: an example using subfossil chironomids. Journal of Paleolimnology, 26(3), 343-350, https://doi.org/10.1023/A:1017568913302
Rieradevall, M; Brooks, Stephen J (2001): An identification guide to subfossil Tanypodinae larvae (Insecta: Diptera: Chrironomidae) based on cephalic setation. Journal of Paleolimnology, 25(1), 81-99, https://doi.org/10.1023/A:1008185517959
Project(s):
Funding:
Swiss National Science Foundation (SNF), grant/award no. 182084: Exploring prehistoric vegetational and agricultural dynamics using annually laminated sediment records from Central and Southern Europe (ECSE)
Swiss National Science Foundation (SNF), grant/award no. 204220: Biochemical responses of lakes to rapid climate transitions across space and time: insights from novel high-resolution analyses of sediments from Europe and Northern China
Coverage:
Latitude: 42.612055 * Longitude: 11.770339
Minimum DEPTH, sediment/rock: 9.0368 m * Maximum DEPTH, sediment/rock: 10.4764 m
Event(s):
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1620 data points