Citation:

PANGAEA.983895

Name: Chironomid head capsules counts of the MIS-5a sediment sequence from Sokli (Finland) in 2010
Published: 2025-07-18
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Chironomids; diatoms; Finland; LOI; Macro-remains; MIS-5a; non-pollen palynomorphs; Odderade; Pollen; Sokli

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Published: 2025-07-18 • DOI registered: 2025-08-16

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Abstract:

This dataset provides counts of chironomid head capsules for the MIS 5a sediment sequence retrieved from Sokli (Finland) in 2010. Counts per taxon are presented against depth (m). The chironomid dataset provides information on MIS 5a ecosystem dynamics and was used to quantitatively reconstruct climate conditions (Helmens et al., 2021). A total of 43 samples were selected for chironomid analysis. The samples were treated with warm KOH (10%) to de-flocculate the material and subsequently rinsed through a sieve with a 100-µm mesh. Chironomid head capsules (HCs) were hand-picked from the residue using a Bogorov sorting tray and mounted on permanent microscope slides using Euparal mounting medium. HCs were identified using Brooks et al. (2007). The top sample as well as the bottom three samples had very low count sums and these were left out of the dataset prior to further analysis. The final dataset presented here contains 39 samples. The analyses were performed in the laboratories of the University of Helsinki, Finland.

Keyword(s):

Chironomids; diatoms; Finland; LOI; Macro-remains; MIS-5a; non-pollen palynomorphs; Odderade; Pollen; Sokli

Related to:

Helmens, Karin F; Katrantsiotis, Christos; Kuosmanen, Niina; Luoto, Tomi P; Salonen, J Sakari; Väliranta, Minna (2021): Prolonged interglacial warmth during the Last Glacial in northern Europe. Boreas, 50(2), 331-350, https://doi.org/10.1111/bor.12495

References:

Brooks, Steve J; Langdon, Peter G; Heiri, Oliver (2007): The Identification and Use of Palaearctic Chironomidae Larvae in Palaeoecology. Quaternary Research Association, Technical Guide, Quaternary Research Association, London Quaternary Research Association Technical Guide, 10, 276 pp, https://edoc.unibas.ch/entities/publication/8701126d-f70d-4972-ad94-4b59d5cdf706

Coverage:

Latitude: 67.800278 * Longitude: 29.300278

Date/Time Start: 2010-02-15T08:00:00 * Date/Time End: 2010-02-15T17:00:00

Minimum DEPTH, sediment/rock: 9.275 m * Maximum DEPTH, sediment/rock: 11.740 m

Event(s):

Sokli_2010/2 (Borehole Sokli 2/2010) * Latitude: 67.800278 * Longitude: 29.300278 * Date/Time Start: 2010-02-15T08:00:00 * Date/Time End: 2010-02-15T17:00:00 * Elevation: 220.0 m * Location: Finland * Method/Device: Hydraulic piston corer (HPC)

Comment:

Further funding was provided by SKB (Swedish Nuclear Fuel and Waste Management Company) and the Bolin Centre for Climate Research.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Luoto, Tomi P		Geocode
2	Ablabesmyia	Ablabesmyia	#	Luoto, Tomi P	see description in data abstract
3	Procladius	Procladius	#	Luoto, Tomi P	see description in data abstract
4	Thienemannimyia	Thienemannimyia	#	Luoto, Tomi P	see description in data abstract
5	Chironomus anthracinus-type	C. anthracinus-T	#	Luoto, Tomi P	see description in data abstract
6	Chironomus plumosus-type	C. plumosus-T	#	Luoto, Tomi P	see description in data abstract
7	Cladopelma lateralis-type	C. lateralis-T	#	Luoto, Tomi P	see description in data abstract
8	Cryptochironomus	Cryptochironomus	#	Luoto, Tomi P	see description in data abstract
9	Dicrotendipes nervosus-type	D. nervosus-T	#	Luoto, Tomi P	see description in data abstract
10	Endochironomus albipennis-type	E. albipennis-T	#	Luoto, Tomi P	see description in data abstract
11	Endochironomus impar-type	E. impar-T	#	Luoto, Tomi P	see description in data abstract
12	Endochironomus tendens-type	E. tendens-T	#	Luoto, Tomi P	see description in data abstract
13	Glyptotendipes barbipes-type	G. barbipes-T	#	Luoto, Tomi P	see description in data abstract
14	Glyptotendipes pallens-type	G. pallens-T	#	Luoto, Tomi P	see description in data abstract
15	Microtendipes pedellus-type	M. pedellus-T	#	Luoto, Tomi P	see description in data abstract
16	Pagastiella orophila-type	Pagastiella orophila-T	#	Luoto, Tomi P	see description in data abstract
17	Paracladopelma	Paracladopelma	#	Luoto, Tomi P	see description in data abstract
18	Paratendipes albimanus-type	P. albimannus-T	#	Luoto, Tomi P	see description in data abstract
19	Polypedilum nubeculosum-type	P. nubeculosum-T	#	Luoto, Tomi P	see description in data abstract
20	Sergentia coracina-type	S. coracina-T	#	Luoto, Tomi P	see description in data abstract
21	Stictochironomus rosenschoeldi-type	S. rosenschoeldi-T	#	Luoto, Tomi P	see description in data abstract
22	Cladotanytarsus mancus-type	C. mancus-T	#	Luoto, Tomi P	see description in data abstract
23	Constempellina	Constempellina	#	Luoto, Tomi P	see description in data abstract
24	Corynocera ambigua	C. ambigua	#	Luoto, Tomi P	see description in data abstract
25	Corynocera oliveri-type	C. oliveri-T	#	Luoto, Tomi P	see description in data abstract
26	Micropsectra contracta-type	M. contracta-T	#	Luoto, Tomi P	see description in data abstract
27	Paratanytarsus penicillatus-type	P. penicillatus-T	#	Luoto, Tomi P	see description in data abstract
28	Tanytarsus chinyensis-type	T. chinyensis-T	#	Luoto, Tomi P	see description in data abstract
29	Tanytarsus glabrescens-type	T. glabrescens-T	#	Luoto, Tomi P	see description in data abstract
30	Tanytarsus lugens-type	T. lugens-T	#	Luoto, Tomi P	see description in data abstract
31	Tanytarsus mendax-type	T. mendax-T	#	Luoto, Tomi P	see description in data abstract
32	Tanytarsus pallidicornis-type	T. pallidicornis-T	#	Luoto, Tomi P	see description in data abstract
33	Tanytarsus indeterminata	Tanytarsus indet	#	Luoto, Tomi P	see description in data abstract
34	Stempellina	Stempellina	#	Luoto, Tomi P	see description in data abstract
35	Pseudochironomus	Pseudochironomus	#	Luoto, Tomi P	see description in data abstract
36	Corynoneura arctica-type	C. arctica-T	#	Luoto, Tomi P	see description in data abstract
37	Cricotopus cylindraecus-type	C. cylindraecus-T	#	Luoto, Tomi P	see description in data abstract
38	Cricotopus intersectus-type	C. intersectus-T	#	Luoto, Tomi P	see description in data abstract
39	Cricotopus-type P	Cricotopus-T P	#	Luoto, Tomi P	see description in data abstract
40	Eukiefferiella claripennis-type	E. claripennis-T	#	Luoto, Tomi P	see description in data abstract
41	Heterotrissocladius marcidus-type	H. marcidus-T	#	Luoto, Tomi P	see description in data abstract
42	Krenosmittia	Krenosmittia	#	Luoto, Tomi P	see description in data abstract
43	Limnophyes	Limnophyes	#	Luoto, Tomi P	see description in data abstract
44	Metriocnemus fuscipes-type	M. fuscipes-T	#	Luoto, Tomi P	see description in data abstract
45	Nanocladius rectinervis-type	N. rectinervis-T	#	Luoto, Tomi P	see description in data abstract
46	Nanocladius branchicolus-type	N. branchicolus-T	#	Luoto, Tomi P	see description in data abstract
47	Orthocladius consobrinus-type	O. consobrinus-T	#	Luoto, Tomi P	see description in data abstract
48	Orthocladius oliveri-type	O. oliveri-T	#	Luoto, Tomi P	see description in data abstract
49	Orthocladius-type I	Orthocladius-T I	#	Luoto, Tomi P	see description in data abstract
50	Parachaetocladius	Parachaetocladius	#	Luoto, Tomi P	see description in data abstract
51	Parakiefferiella bathophila-type	P. bathophila-T	#	Luoto, Tomi P	see description in data abstract
52	Parakiefferiella triquetra-type	P. triquetra-T	#	Luoto, Tomi P	see description in data abstract
53	Propsilocerus lacustris-Type	P. lacustris-T	#	Luoto, Tomi P	see description in data abstract
54	Psectrocladius flavus-type	P. flavus-T	#	Luoto, Tomi P	see description in data abstract
55	Psectrocladius barbatipes-type	P. barbatipes-T	#	Luoto, Tomi P	see description in data abstract
56	Psectrocladius septentrionalis-type	P. septentrionalis-T	#	Luoto, Tomi P	see description in data abstract
57	Psectrocladius sordidellus-type	P.sordidellus-T	#	Luoto, Tomi P	see description in data abstract
58	Pseudodiamesa	Pseudodiamesa	#	Luoto, Tomi P	see description in data abstract
59	Pseudosmittia	Pseudosmittia	#	Luoto, Tomi P	see description in data abstract
60	Synorthocladius	Synorthocladius	#	Luoto, Tomi P	see description in data abstract
61	Thienemanniella clavicornis-type	T. clavicornis-T	#	Luoto, Tomi P	see description in data abstract
62	Zalutschia-type A	Zalutschia-T A	#	Luoto, Tomi P	see description in data abstract
63	Zalutschia zalutschicola-type	Z. zalutschicola-T	#	Luoto, Tomi P	see description in data abstract
64	Diamesa zernyi/cinerella-type	D. zernyi/cinerella-T	#	Luoto, Tomi P	see description in data abstract

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2457 data points

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