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Helmens, Karin; Engels, Stefan; Katrantsiotis, Christos; Kuosmanen, Niina; Luoto, Tomi P; Salonen, J Sakari; Väliranta, Minna (2025): Chironomid head capsules counts of the MIS-5a sediment sequence from Sokli (Finland) in 2010 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983895

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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):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 DEPTH, sediment/rockDepth sedmLuoto, Tomi PGeocode
2 AblabesmyiaAblabesmyia#Luoto, Tomi Psee description in data abstract
3 ProcladiusProcladius#Luoto, Tomi Psee description in data abstract
4 ThienemannimyiaThienemannimyia#Luoto, Tomi Psee description in data abstract
5 Chironomus anthracinus-typeC. anthracinus-T#Luoto, Tomi Psee description in data abstract
6 Chironomus plumosus-typeC. plumosus-T#Luoto, Tomi Psee description in data abstract
7 Cladopelma lateralis-typeC. lateralis-T#Luoto, Tomi Psee description in data abstract
8 CryptochironomusCryptochironomus#Luoto, Tomi Psee description in data abstract
9 Dicrotendipes nervosus-typeD. nervosus-T#Luoto, Tomi Psee description in data abstract
10 Endochironomus albipennis-typeE. albipennis-T#Luoto, Tomi Psee description in data abstract
11 Endochironomus impar-typeE. impar-T#Luoto, Tomi Psee description in data abstract
12 Endochironomus tendens-typeE. tendens-T#Luoto, Tomi Psee description in data abstract
13 Glyptotendipes barbipes-typeG. barbipes-T#Luoto, Tomi Psee description in data abstract
14 Glyptotendipes pallens-typeG. pallens-T#Luoto, Tomi Psee description in data abstract
15 Microtendipes pedellus-typeM. pedellus-T#Luoto, Tomi Psee description in data abstract
16 Pagastiella orophila-typePagastiella orophila-T#Luoto, Tomi Psee description in data abstract
17 ParacladopelmaParacladopelma#Luoto, Tomi Psee description in data abstract
18 Paratendipes albimanus-typeP. albimannus-T#Luoto, Tomi Psee description in data abstract
19 Polypedilum nubeculosum-typeP. nubeculosum-T#Luoto, Tomi Psee description in data abstract
20 Sergentia coracina-typeS. coracina-T#Luoto, Tomi Psee description in data abstract
21 Stictochironomus rosenschoeldi-typeS. rosenschoeldi-T#Luoto, Tomi Psee description in data abstract
22 Cladotanytarsus mancus-typeC. mancus-T#Luoto, Tomi Psee description in data abstract
23 ConstempellinaConstempellina#Luoto, Tomi Psee description in data abstract
24 Corynocera ambiguaC. ambigua#Luoto, Tomi Psee description in data abstract
25 Corynocera oliveri-typeC. oliveri-T#Luoto, Tomi Psee description in data abstract
26 Micropsectra contracta-typeM. contracta-T#Luoto, Tomi Psee description in data abstract
27 Paratanytarsus penicillatus-typeP. penicillatus-T#Luoto, Tomi Psee description in data abstract
28 Tanytarsus chinyensis-typeT. chinyensis-T#Luoto, Tomi Psee description in data abstract
29 Tanytarsus glabrescens-typeT. glabrescens-T#Luoto, Tomi Psee description in data abstract
30 Tanytarsus lugens-typeT. lugens-T#Luoto, Tomi Psee description in data abstract
31 Tanytarsus mendax-typeT. mendax-T#Luoto, Tomi Psee description in data abstract
32 Tanytarsus pallidicornis-typeT. pallidicornis-T#Luoto, Tomi Psee description in data abstract
33 Tanytarsus indeterminataTanytarsus indet#Luoto, Tomi Psee description in data abstract
34 StempellinaStempellina#Luoto, Tomi Psee description in data abstract
35 PseudochironomusPseudochironomus#Luoto, Tomi Psee description in data abstract
36 Corynoneura arctica-typeC. arctica-T#Luoto, Tomi Psee description in data abstract
37 Cricotopus cylindraecus-typeC. cylindraecus-T#Luoto, Tomi Psee description in data abstract
38 Cricotopus intersectus-typeC. intersectus-T#Luoto, Tomi Psee description in data abstract
39 Cricotopus-type PCricotopus-T P#Luoto, Tomi Psee description in data abstract
40 Eukiefferiella claripennis-typeE. claripennis-T#Luoto, Tomi Psee description in data abstract
41 Heterotrissocladius marcidus-typeH. marcidus-T#Luoto, Tomi Psee description in data abstract
42 KrenosmittiaKrenosmittia#Luoto, Tomi Psee description in data abstract
43 LimnophyesLimnophyes#Luoto, Tomi Psee description in data abstract
44 Metriocnemus fuscipes-typeM. fuscipes-T#Luoto, Tomi Psee description in data abstract
45 Nanocladius rectinervis-typeN. rectinervis-T#Luoto, Tomi Psee description in data abstract
46 Nanocladius branchicolus-typeN. branchicolus-T#Luoto, Tomi Psee description in data abstract
47 Orthocladius consobrinus-typeO. consobrinus-T#Luoto, Tomi Psee description in data abstract
48 Orthocladius oliveri-typeO. oliveri-T#Luoto, Tomi Psee description in data abstract
49 Orthocladius-type IOrthocladius-T I#Luoto, Tomi Psee description in data abstract
50 ParachaetocladiusParachaetocladius#Luoto, Tomi Psee description in data abstract
51 Parakiefferiella bathophila-typeP. bathophila-T#Luoto, Tomi Psee description in data abstract
52 Parakiefferiella triquetra-typeP. triquetra-T#Luoto, Tomi Psee description in data abstract
53 Propsilocerus lacustris-TypeP. lacustris-T#Luoto, Tomi Psee description in data abstract
54 Psectrocladius flavus-typeP. flavus-T#Luoto, Tomi Psee description in data abstract
55 Psectrocladius barbatipes-typeP. barbatipes-T#Luoto, Tomi Psee description in data abstract
56 Psectrocladius septentrionalis-typeP. septentrionalis-T#Luoto, Tomi Psee description in data abstract
57 Psectrocladius sordidellus-typeP.sordidellus-T#Luoto, Tomi Psee description in data abstract
58 PseudodiamesaPseudodiamesa#Luoto, Tomi Psee description in data abstract
59 PseudosmittiaPseudosmittia#Luoto, Tomi Psee description in data abstract
60 SynorthocladiusSynorthocladius#Luoto, Tomi Psee description in data abstract
61 Thienemanniella clavicornis-typeT. clavicornis-T#Luoto, Tomi Psee description in data abstract
62 Zalutschia-type AZalutschia-T A#Luoto, Tomi Psee description in data abstract
63 Zalutschia zalutschicola-typeZ. zalutschicola-T#Luoto, Tomi Psee description in data abstract
64 Diamesa zernyi/cinerella-typeD. zernyi/cinerella-T#Luoto, Tomi Psee 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

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Depth sed [m]		2 
Ablabesmyia [#]		3 
Procladius [#]		4 
Thienemannimyia [#]		5 
C. anthracinus-T [#]		6 
C. plumosus-T [#]		7 
C. lateralis-T [#]		8 
Cryptochironomus [#]		9 
D. nervosus-T [#]		10 
E. albipennis-T [#]		11 
E. impar-T [#]		12 
E. tendens-T [#]		13 
G. barbipes-T [#]		14 
G. pallens-T [#]		15 
M. pedellus-T [#]		16 
Pagastiella orophila-T [#]		17 
Paracladopelma [#]		18 
P. albimannus-T [#]		19 
P. nubeculosum-T [#]		20 
S. coracina-T [#]		21 
S. rosenschoeldi-T [#]		22 
C. mancus-T [#]		23 
Constempellina [#]		24 
C. ambigua [#]		25 
C. oliveri-T [#]		26 
M. contracta-T [#]		27 
P. penicillatus-T [#]		28 
T. chinyensis-T [#]		29 
T. glabrescens-T [#]		30 
T. lugens-T [#]		31 
T. mendax-T [#]		32 
T. pallidicornis-T [#]		33 
Tanytarsus indet [#]		34 
Stempellina [#]		35 
Pseudochironomus [#]		36 
C. arctica-T [#]		37 
C. cylindraecus-T [#]		38 
C. intersectus-T [#]		39 
Cricotopus-T P [#]		40 
E. claripennis-T [#]		41 
H. marcidus-T [#]		42 
Krenosmittia [#]		43 
Limnophyes [#]		44 
M. fuscipes-T [#]		45 
N. rectinervis-T [#]		46 
N. branchicolus-T [#]		47 
O. consobrinus-T [#]		48 
O. oliveri-T [#]		49 
Orthocladius-T I [#]		50 
Parachaetocladius [#]		51 
P. bathophila-T [#]		52 
P. triquetra-T [#]		53 
P. lacustris-T [#]		54 
P. flavus-T [#]		55 
P. barbatipes-T [#]		56 
P. septentrionalis-T [#]		57 
P.sordidellus-T [#]		58 
Pseudodiamesa [#]		59 
Pseudosmittia [#]		60 
Synorthocladius [#]		61 
T. clavicornis-T [#]		62 
Zalutschia-T A [#]		63 
Z. zalutschicola-T [#]		64 
D. zernyi/cinerella-T [#]
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9.3251001002010000030031003030020230400002400201020000000000030000010
9.375110402030000040030003040060120900011300000010100100000030000000
9.425100303010000030030004250090120400011400000010000010000040010000
9.475100201010000010000001060070200400002500000030020000010080020020
9.525200600060100060000002060030100100002200003000010000000050000030
9.575400300040000060001003080010020300002600000000010000001030000020
9.625210403030000060010002040050010400002600000000010000000040000020
9.6750009000300000100100000100030040410011601000000110000000010000030
9.7250204200200000200100000140060140500001300001000010010000010000010
9.7752102020500100300100020100060150100003100000000010000000050000010
9.825100601020000040010004050020030010002900000020010010000070000010
9.8751006010400000100000020160060000000025200000000010000000020000010
10.025100301000000020000105080040200400022500000001010000002030010020
10.0782101010400000110000040100020110800034200000000010000001020000000
10.1311101001202000110000030160010130300021410000000020110001020000000
10.1841104000100000210000010121060110200001210000010040000001080000000
10.2370104100400200200000010140000010300003810000000030000000030000000
10.2900314100100100200000010160020010100006500000000020000000150000000
10.34311010100100100200000000900100104000111200000000000000000050000000
10.396110510020040020000201080030140100122600000000000000001020000000
10.4493106000201000200000000100070000200010500000000000010003060000000
10.50214020000000001000020201020400004000106000000020000000000100000000
10.555240400002000020002200042000240200020620000002000002020030000000
10.6081101000000000400011000700000333000307000000000000000000150000000
10.6611104020100100700011010100011010400030300000000000300000040000000
10.7141204002040000200000010210000010600022100000000000000000010000000
10.7672102000032000200000020190000040400020400000000000000000040000000
10.8204402600042000400000020120000240100000200000000000000000010000000
10.87301000100111001000200501810000130100000000000100000000000050000000
10.92601011200110023000600301010000110100100000000000000010001020010000
10.9790101010130000300050060102010070100100300000000000000000040010000
11.050010400010002060006001037000120300102100100000000000100040120000
11.165000521120000100002005076200230100011100200000000000000040000001
11.28004015000000000000050040212000020300001000000000000010000041000000
11.395181300005100130006004018000010100200200000000001000000030010000
11.5100311100025001000002000007000002702001300000000000010000040000110
11.6251304010040000000060030016000003700000210000000000000000010000000
11.7400207020011000200020020022000000000000000020000000000000070000010