Chironomid head capsules for the Holocene sediment sequence retrieved from Lake Loitsana, Finland
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2025
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| _version_ | 1867169165252493312 |
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| author | Shala, Shyhrete Helmens, Karin Engels, Stefan Kuhry, Peter Kylander, Malin E Luoto, Tomi P Salonen, Sakari Väliranta, Minna Weckström, Jan |
| author_facet | Shala, Shyhrete Helmens, Karin Engels, Stefan Kuhry, Peter Kylander, Malin E Luoto, Tomi P Salonen, Sakari Väliranta, Minna Weckström, Jan |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | This dataset provides counts of chironomid head capsules for the Holocene sediment sequence retrieved from Lake Loitsana (Finland) in 2008. Counts per taxon are presented against both depth (m) and age (cal ka. BP). Two age/depths models are presented: the first model represents the original age/depth model applied to the records (Shala et al., 2014b; 2017) and the second age/depth model, which is the author-preferred version, presents updated age-estimates derived using the r package 'Bacon' (Blaauw and Christensen, 2011). The chironomid dataset provides information on Holocene lake ecosystem dynamics and was used to quantitatively reconstruct local climate conditions. A total of 71 samples from the Holocene sediment sequence 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). A minimum of 50 midge individuals was identified from each sample with the exception of the lowermost two samples of the sequence, where head capsule concentrations were extremely low. All analyses were performed in the laboratories of the University of Helsinki, Finland. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_975207 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chironomid head capsules for the Holocene sediment sequence retrieved from Lake Loitsana, Finland Shala, Shyhrete Helmens, Karin Engels, Stefan Kuhry, Peter Kylander, Malin E Luoto, Tomi P Salonen, Sakari Väliranta, Minna Weckström, Jan Ablabesmyia; Acricotopus; Age model; C/N; Calculated, according to Shala et al. (2017); Calculated according to Blaauw and Christen (2011); Chaetocladius; Chironomids; Chironomus anthracinus-type; Chironomus plumosus-type; Cladopelma lateralis-type; Cladotanytarsus mancus-type; Constempellina; Corynocera ambigua; Corynocera oliveri-type; Corynoneura arctica-type; Corynoneura lobata-type; Cricotopus bicinctus-type; Cricotopus cylindraceus-type; Cricotopus indeterminata; Cricotopus intersectus-type; Cricotopus sylvestris-type; Cricotopus trifasciatus-type; Cricotopus-type P; Cryptochironomus; Cryptotendipes; Demicryptochironomus; DEPTH, sediment/rock; Diamesa bertrami-type; diatoms; Dicrotendipes nervosus-type; Einfeldia pagana-type; Endochironomus albipennis-type; Endochironomus impar-type; Endochironomus tendens-type; Eukiefferiella claripennis-type; Eukiefferiella devonica-type; Eukiefferiella fittkaui-type; Finland; Glyptotendipes barbipes-type; Glyptotendipes pallens-type; Harnischia; Heterotrissocladius grimshawi-type; Heterotrissocladius maeaeri-type; Heterotrissocladius marcidus-type; Holocene; Hydrobaenus johannseni-type; Hydrobaenus lugubris-type; Itrax; Krenosmittia; Limnophyes; LL; LOI; Loitsana_Lake; Macro-remains; Mesocricotopus; Micropsectra contracta-type; Micropsectra insignilobus-type; Micropsectra pallidula-type; Micropsectra radialis-type; Microtendipes pedellus-type; Monodiamesa; Nanocladius branchicolus-type; Nanocladius rectinervis-type; Orthocladius consobrinus-type; Orthocladius oliveri-type; Orthocladius sp.; Orthocladius trigonolabris-type; Orthocladius-type I; Pagastiella; Parachironomus varus-type; Paracladius; Paracricotopus; Parakiefferiella bathophila-type; Parakiefferiella triquetra-type; Paraphaenocladius; Paratanytarsus austriacus-type; Paratanytarsus indeterminata; Paratanytarsus penicillatus-type; Paratendipes albimanus-type; Pollen; Polypedilum nubeculosum-type; Procladius; Propsilocerus-type N; Protanypus; Psectrocladius calcaratus-type; Psectrocladius flavus-type; Psectrocladius septentrionalis-type; Psectrocladius sordidellus-type; Pseudochironomus; Pseudosmittia; Rheocricotopus chalybeatus-type; Rheocricotopus effusus-type; Rheocricotopus fuscipes-type; Rheotanytarsus; RPC; Russian peat corer; Sergentia coracina-type; Smittia foliacea-type; Sokli; Stable isotopes; Stempellina; Stempellinella; Stictochironomus rosenschoeldi-type; Symposiocladius; Synorthocladius; Tanytarsus chinyensis-type; Tanytarsus glabrescens-type; Tanytarsus indeterminata; Tanytarsus lactescens-type; Tanytarsus lugens-type; Tanytarsus mendax-type; Tanytarsus pallidicornis-type; Thienemanniella indeterminata; Thienemannimyia-type; Tribelos; Unidentified; Wet sieved (100 µm) followed by hand picking from Bogorov sorting tray, mounted on permanent microscope slides, Euparal mounting medium; Zalutschia-type A; Zalutschia-type B; Zalutschia zalutschicola; Zavrelimyia This dataset provides counts of chironomid head capsules for the Holocene sediment sequence retrieved from Lake Loitsana (Finland) in 2008. Counts per taxon are presented against both depth (m) and age (cal ka. BP). Two age/depths models are presented: the first model represents the original age/depth model applied to the records (Shala et al., 2014b; 2017) and the second age/depth model, which is the author-preferred version, presents updated age-estimates derived using the r package 'Bacon' (Blaauw and Christensen, 2011). The chironomid dataset provides information on Holocene lake ecosystem dynamics and was used to quantitatively reconstruct local climate conditions. A total of 71 samples from the Holocene sediment sequence 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). A minimum of 50 midge individuals was identified from each sample with the exception of the lowermost two samples of the sequence, where head capsule concentrations were extremely low. All analyses were performed in the laboratories of the University of Helsinki, Finland. |
| title | Chironomid head capsules for the Holocene sediment sequence retrieved from Lake Loitsana, Finland |
| topic | Ablabesmyia; Acricotopus; Age model; C/N; Calculated, according to Shala et al. (2017); Calculated according to Blaauw and Christen (2011); Chaetocladius; Chironomids; Chironomus anthracinus-type; Chironomus plumosus-type; Cladopelma lateralis-type; Cladotanytarsus mancus-type; Constempellina; Corynocera ambigua; Corynocera oliveri-type; Corynoneura arctica-type; Corynoneura lobata-type; Cricotopus bicinctus-type; Cricotopus cylindraceus-type; Cricotopus indeterminata; Cricotopus intersectus-type; Cricotopus sylvestris-type; Cricotopus trifasciatus-type; Cricotopus-type P; Cryptochironomus; Cryptotendipes; Demicryptochironomus; DEPTH, sediment/rock; Diamesa bertrami-type; diatoms; Dicrotendipes nervosus-type; Einfeldia pagana-type; Endochironomus albipennis-type; Endochironomus impar-type; Endochironomus tendens-type; Eukiefferiella claripennis-type; Eukiefferiella devonica-type; Eukiefferiella fittkaui-type; Finland; Glyptotendipes barbipes-type; Glyptotendipes pallens-type; Harnischia; Heterotrissocladius grimshawi-type; Heterotrissocladius maeaeri-type; Heterotrissocladius marcidus-type; Holocene; Hydrobaenus johannseni-type; Hydrobaenus lugubris-type; Itrax; Krenosmittia; Limnophyes; LL; LOI; Loitsana_Lake; Macro-remains; Mesocricotopus; Micropsectra contracta-type; Micropsectra insignilobus-type; Micropsectra pallidula-type; Micropsectra radialis-type; Microtendipes pedellus-type; Monodiamesa; Nanocladius branchicolus-type; Nanocladius rectinervis-type; Orthocladius consobrinus-type; Orthocladius oliveri-type; Orthocladius sp.; Orthocladius trigonolabris-type; Orthocladius-type I; Pagastiella; Parachironomus varus-type; Paracladius; Paracricotopus; Parakiefferiella bathophila-type; Parakiefferiella triquetra-type; Paraphaenocladius; Paratanytarsus austriacus-type; Paratanytarsus indeterminata; Paratanytarsus penicillatus-type; Paratendipes albimanus-type; Pollen; Polypedilum nubeculosum-type; Procladius; Propsilocerus-type N; Protanypus; Psectrocladius calcaratus-type; Psectrocladius flavus-type; Psectrocladius septentrionalis-type; Psectrocladius sordidellus-type; Pseudochironomus; Pseudosmittia; Rheocricotopus chalybeatus-type; Rheocricotopus effusus-type; Rheocricotopus fuscipes-type; Rheotanytarsus; RPC; Russian peat corer; Sergentia coracina-type; Smittia foliacea-type; Sokli; Stable isotopes; Stempellina; Stempellinella; Stictochironomus rosenschoeldi-type; Symposiocladius; Synorthocladius; Tanytarsus chinyensis-type; Tanytarsus glabrescens-type; Tanytarsus indeterminata; Tanytarsus lactescens-type; Tanytarsus lugens-type; Tanytarsus mendax-type; Tanytarsus pallidicornis-type; Thienemanniella indeterminata; Thienemannimyia-type; Tribelos; Unidentified; Wet sieved (100 µm) followed by hand picking from Bogorov sorting tray, mounted on permanent microscope slides, Euparal mounting medium; Zalutschia-type A; Zalutschia-type B; Zalutschia zalutschicola; Zavrelimyia |
| url | https://doi.org/10.1594/PANGAEA.975207 |