The sediment sequence from Budzewo (Skaliska Basin, north-eastern Poland) contains cladoceran
records beginning from the early Holocene. A total of 33 Cladocera taxa were identifi ed in the entire sequence.
The cladoceran fauna of the initial stage of palaeolake history in the Preboreal shows high similarity to early
Holocene Estonian and Scandinavian records. Benthic Alonella nana was dominant at that time. After that,
probably during the Boreal and early Atlantic periods, Cladocera species diversity increased and planktonic
forms (bosminas) became dominant, pointing to a rise of water level. The species composition indicates that the
lake was meso- to eutrophic. The lake began to shallow during the middle Atlantic. The process was completed
in the Subboreal and the lake transformed into a bog. The fall in water level and fi nally the terrestrialization of
the lake is correlated with similar processes recorded in other sediment sequences in northern Poland, suggesting
that this event may have been driven by regional factors such as lower precipitation.
CITATIONS(2):
1.
Regional and local changes inferred from lacustrine organic matter deposited between the Late Glacial and mid-Holocene in the Skaliska Basin (north-eastern Poland) Piotr Kołaczek, Joanna Mirosław-Grabowska, Monika Karpińska-Kołaczek, Renata Stachowicz-Rybka Quaternary International
Natural transformation of the Romoty paleolake (NE Poland) during the Late Glacial and Holocene based on isotopic, pollen, cladoceran and geochemical data Joanna Mirosław-Grabowska, Edyta Zawisza, Agata Jaskółka, Milena Obremska Quaternary International
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