Testate amoebae in an ombrotrophic bog reconcile equivocal palaeoclimate reconstructions for the Western Carpathians

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F25%3A00605105" target="_blank" >RIV/67985939:_____/25:00605105 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00142338

Výsledek na webu

<a href="https://doi.org/10.1016/j.quascirev.2024.109062" target="_blank" >https://doi.org/10.1016/j.quascirev.2024.109062</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.quascirev.2024.109062" target="_blank" >10.1016/j.quascirev.2024.109062</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Testate amoebae in an ombrotrophic bog reconcile equivocal palaeoclimate reconstructions for the Western Carpathians

Popis výsledku v původním jazyce

Knowledge about climate changes is crucial for understanding past and current anthropogenic ecosystemchanges, but individual palaeoclimate proxies involve different habitat-dependent confounding factors. Continuously ombrotrophic bogs are an excellent system for palaeoclimate reconstructions because their functioning depends tightly on water table depth (WTD), which varies exclusively with the balance between precipitation and temperature. In the paper, we investigate a 7000-year-long record from the Puscizna Wielka bog (Poland). We focused on developing the first palaeoclimatological reconstruction for the Western Carpathians, which together includes testate amoebae (TA), the isotopic signal in Sphagnum stems (δ13C and δ18O), and plant macrofossils (PM), the latter enabling to trace micro-topographical changes and assess if the consistent ombrotrophic conditions needed for unbiased reconstruction were met. Our WTD reconstructions were compared with the downscaled CCSM3 simulations. Pollen data provided information on the surrounding vegetation. Reconstructed pH and species composition of PM confirmed continual ombrotrophy. At the Middle-Late Holocene boundary (ca 4300–4200 cal yr BP), the TA-rich lawn phase with Sphagnum magellanicum and Eriophorum vaginatum replaced the initial hollow-like phase with Scheuchzeria, Sphagnum sec. Cuspidata and Archerella flavum. The climate driver of this change (decreased humidity) is also suggested by a increase in fir pollen at the expense of spruce. For the last ca 230 years, δ13C and TA suggest that the bog had experienced unprecedented drought. The bog was dominated by Sphagnum rubellum-dwarf shrub hummocks with Alabasta militaris, Assulina muscorum and Hyalosphenia elegans at this time. Apart from these major changes, we identified several other events that are otherwise documented only by individual studies across Europe for the Late Holocene, especially for the Little Ice Age. Six distinctly wet and five distinctly dry periods were consistent among at least two proxies, with a conspicuously warm and dry climate at thebeginning of the Bronze Age, allowing human colonisation of previously harsh mountain areas.

Název v anglickém jazyce

Testate amoebae in an ombrotrophic bog reconcile equivocal palaeoclimate reconstructions for the Western Carpathians

Popis výsledku anglicky

Knowledge about climate changes is crucial for understanding past and current anthropogenic ecosystemchanges, but individual palaeoclimate proxies involve different habitat-dependent confounding factors. Continuously ombrotrophic bogs are an excellent system for palaeoclimate reconstructions because their functioning depends tightly on water table depth (WTD), which varies exclusively with the balance between precipitation and temperature. In the paper, we investigate a 7000-year-long record from the Puscizna Wielka bog (Poland). We focused on developing the first palaeoclimatological reconstruction for the Western Carpathians, which together includes testate amoebae (TA), the isotopic signal in Sphagnum stems (δ13C and δ18O), and plant macrofossils (PM), the latter enabling to trace micro-topographical changes and assess if the consistent ombrotrophic conditions needed for unbiased reconstruction were met. Our WTD reconstructions were compared with the downscaled CCSM3 simulations. Pollen data provided information on the surrounding vegetation. Reconstructed pH and species composition of PM confirmed continual ombrotrophy. At the Middle-Late Holocene boundary (ca 4300–4200 cal yr BP), the TA-rich lawn phase with Sphagnum magellanicum and Eriophorum vaginatum replaced the initial hollow-like phase with Scheuchzeria, Sphagnum sec. Cuspidata and Archerella flavum. The climate driver of this change (decreased humidity) is also suggested by a increase in fir pollen at the expense of spruce. For the last ca 230 years, δ13C and TA suggest that the bog had experienced unprecedented drought. The bog was dominated by Sphagnum rubellum-dwarf shrub hummocks with Alabasta militaris, Assulina muscorum and Hyalosphenia elegans at this time. Apart from these major changes, we identified several other events that are otherwise documented only by individual studies across Europe for the Late Holocene, especially for the Little Ice Age. Six distinctly wet and five distinctly dry periods were consistent among at least two proxies, with a conspicuously warm and dry climate at thebeginning of the Bronze Age, allowing human colonisation of previously harsh mountain areas.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Quaternary Science Reviews

ISSN

0277-3791

e-ISSN

1873-457X

Svazek periodika

349

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

19

Strana od-do

109062

Kód UT WoS článku

001388765000001

EID výsledku v databázi Scopus

2-s2.0-85211972513