Karin Helmens
Helmens
Karin
Stefan Engels
Engels
Stefan
Christos Katrantsiotis
Katrantsiotis
Christos
Niina Kuosmanen
Kuosmanen
Niina
Tomi P Luoto
Luoto
Tomi P
J Sakari Salonen
Salonen
J Sakari
Minna Väliranta
Väliranta
Minna
Diatom valve counts of the MIS-5a sediment sequence from Sokli (Finland) in 2010
PANGAEA
Data Publisher for Earth & Environmental Science
dataset
This dataset provides counts of diatom valves for the MIS-5a sediment sequence retrieved from Sokli (Finland) in 2010. Counts per taxon are presented against depth (m); total sums for classes of diatoms (e.g. Sum Benthic Taxa) are presented as well. The diatom dataset provides information on MIS 5a lake ecosystem dynamics (Helmens et al., 2021). A total of 22 samples were selected for diatom analysis. Diatoms were extracted from the sediment following the protocol presented by Battarbee et al. (2003). First, organic matter was oxidized in H2O2 in a water bath (at c. 100 °C). Subsequently, carbonates were removed by 10% HCl treatment (no visible reaction). Clay particles were decanted from 100 ml beakers after sedimentation overnight. Sand grains were removed after five seconds of sedimentation. The residue was mounted in Naphrax® and analysed under a light microscope with X1000 magnification using immersion oil. Flora used for species identification and information on ecological preferences are presented in Helmens et al. (2009). A minimum of 500 diatom valves were identified from each of the samples (average count = 1322, range = 531-2264 valves). All analyses were performed in the laboratories Stockholm University, Sweden.
Karin F Helmens
Karin F
Prolonged interglacial warmth during the Last Glacial in northern Europe
Boreas
journal article
R W Battarbee
Battarbee
R W
Vivienne J Jones
Jones
Vivienne J
R J Flower
Flower
R J
Nigel G Cameron
Cameron
Nigel G
Helen Bennion
Bennion
Helen
L Carvalho
Carvalho
Stephen Juggins
Juggins
Stephen
Diatoms
Smol, JP, Birks, HJB, Last, WM, Bradley, RS, Alverson, K (eds.), Tracking Environmental Change Using Lake Sediments, Developments in Paleoenvironmental Research, 3, Kluwer Academic Publishers, Dordrecht
book chapter
Jan Risberg
Risberg
Jan
Krister N Jansson
Jansson
Krister N
Jan Weckström
Weckström
Annika Berntsson
Berntsson
Annika
Päivi Kaislahti Tillman
Tillman
Päivi Kaislahti
Peter W Johansson
Johansson
Peter W
Stefan Wastegård
Wastegård
Early MIS 3 glacial lake evolution, ice-marginal retreat pattern and climate at Sokli (northeastern Fennoscandia)
Quaternary Science Reviews
data points
DEPTH, sediment/rock
depth
sediment
rock
Length
Achnanthes bioretii
Diatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.)
Abundance or Count
Achnanthes clevei
Achnanthes conspicua
Achnanthes distincta
Achnanthes exigua
Achnanthes flexella
Achnanthes helvetica
Achnanthes holstii
Achnanthes lanceolata
Achnanthes joursacense
Achnanthes minutissima
Achnanthes oestrupii
Anomoeoneis brachysira
Anomoeoneis sphaerophora
Amphora fogediana
Amphora libyca
Amphora ovalis
Amphora pediculus
Caloneis bacillum
Caloneis silicula
Cocconeis placentula
Cymatopleura elliptica
Cymatopleura solea
Cymbella affinis
Cymbella aspera
Cymbella cistula
Cymbella cuspidata
Cymbella cymbiformis
Cymbella ehrenbergii
Cymbella mesiana
Cymbella naviculiformis
Cymbella proxima
Cymbella silesiaca
Cymbella sinuata
Cymbella subaequalis
Cymbella subcuspidata
Cymbella spp.
Cymbella
Denticula kuetzingii
Denticula tenuis
Diploneis elliptica
Diploneis finnica
Epithemia adnata
Epithemia argus
Epithemia sorex
Epithemia turgida
Eunotia spp.
Eunotia
Fragilaria capucina
Fragilaria constricta
Fragilaria nitzschioides
Fragilaria parasitica
Fragilaria pseudoconstruens
Fragilaria ulna
Frustulia rhomboides
Gomphonema acuminatum
Gomphonema affine
Gomphonema angustatum
Gomphonema angustum
Gomphonema augur
Gomphonema clavatum
Gomphonema gracile
Gomphonema olivaceum
Gomphonema truncatum
Gomphonema spp.
Gomphonema
Gyrosigma acuminatum
Melosira lineata
Melosira moniliformis
Melosira nummuloides
Navicula bacillum
Navicula capitata
Navicula cari
Navicula crucicula
Navicula cryptocephala
Navicula decussis
Navicula elginensis
Navicula exigua
Navicula exigua var. signata
Navicula gastrum
Navicula jentzschii
Navicula laevissima
Navicula laterostrata
Navicula libonensis
Navicula menisculus
Navicula mutica
Navicula oblonga
Navicula placentula
Navicula protracta
Navicula pupula
Navicula radiosa
Navicula recens
Navicula reinhardtii
Navicula rhynchocephala
Navicula scutelloides
Navicula seibigiana
Navicula similis
Navicula slesvicensis
Navicula striolata
Navicula tuscula
Navicula viridula
Neidium ampliatum
Neidium dubium
Neidium productum
Nitzschia amphibia
Nitzschia angustata
Nitzschia frustulum
Pinnularia gibba
Pinnularia interrupta
Pinnularia maior
Pinnularia microstauron
Pinnularia nodosa
Pinnularia viridis
Pinnularia spp.
Pinnularia
Pseudostaurosira robusta
Rhoicosphenia abbreviata
Rhopalodia gibba
Stauroneis anceps
Stauroneis phoenicenteron
Stauroneis smithii
Staurosira brevistriata
Staurosira construens
Staurosira construens var. binodis
Staurosira construens var. construens
Staurosira construens var. subsalina
Staurosira construens var. venter
Staurosirella lapponica
Staurosira neoproducta
Staurosirella pinnata
Staurosirella leptostauron
Staurosirella martyi
Tetracyclus ellipticus
Tetracyclus emarginatus
Tetracyclus glans
Tetracyclus rupestris
Aulacoseira distans
Aulacoseira lirata
Aulacoseira valida
Cyclotella meneghiniana
Tabellaria fenestrata
Tabellaria flocculosa
Aulacoseira alpigena
Aulacoseira ambigua
Aulacoseira crenulata
Aulacoseira islandica
Aulacoseira granulata
Aulacoseira granulata var. angustissima
Aulacoseira italica
Aulacoseira lacustris
Aulacoseira muzzanensis
Aulacoseira subarctica
Cyclostephanos dubius
Cyclotella radiosa
Cyclotella stelligera
Stephanodiscus alpinus
Stephanodiscus hantzschii
Stephanodiscus medius
Stephanodiscus minutulus
Stephanodiscus neoastraea
Diatoma mesodon
Diatoma vulgaris
Meridion circulare
Hantzschia amphioxys
Orthoseira roeseana
Pinnularia borealis
Pinnularia streptoraphe
Achnanthes spp.
Achnanthes
Amphora spp.
Amphora
Aulacoseira spp.
Aulacoseira
Coscinodiscus spp.
Coscinodiscus
Cyclotella spp.
Cyclotella
Navicula spp.
Navicula
Unknown
Diatoms, tertiary
Diatoma
Diatoms, benthic
benthic
Diatoms, tychoplanktic
Diatoms, planktic
Diatoms, rheophilic
Diatoms, aerophilic
Diatoms indeterminata
Total sum
Chironomids; diatoms; Finland; LOI; Macro-remains; MIS 5a; non-pollen palynomorphs; Odderade; Pollen; Sokli
Further funding was provided by SKB (Swedish Nuclear Fuel and Waste Management Company) and the Bolin Centre for Climate Research.
unrestricted
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