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

J 2025

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

ŠÍMOVÁ, Anna; Petra HÁJKOVÁ; Libor PETR; Jan DIVÍŠEK; Kateřina KINTROVÁ et al.

Základní údaje

Originální název

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

Autoři

ŠÍMOVÁ, Anna ; Petra HÁJKOVÁ; Libor PETR; Jan DIVÍŠEK; Kateřina KINTROVÁ a Michal HÁJEK

Vydání

Quaternary Science Reviews, Elsevier, 2025, 0277-3791

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10508 Physical geography

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.300 v roce 2024

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/25:00142338

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Plant macrofossils; Pollen; Quantitative reconstructions; Stable isotopes; Testate amoebae; Transfer functions

Štítky

14314020, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 10. 11. 2025 09:19, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Knowledge about climate changes is crucial for understanding past and current anthropogenic ecosystem changes, 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. Here, 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 (513C and 518O), 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. Both the regional (TAREG, PM) and continental (TAEU) calibration training sets were used for quantitative WTD reconstructions. 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 100-200 years delayed increase in fir pollen at the expense of spruce. For the last ca 230 years, 513C and TA suggest that the bog had experienced unprecedented drought. The bog was dominated by Sphagnum rubellumdwarf 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 the beginning of the Bronze Age, allowing human colonisation of previously harsh mountain areas. The consistency with CCSM3 was the highest for TAREG-inferred WTD and lowest for 518O. The temperature and precipitation of the warmest quarter were the most influential explanatory variables in multiple regression. Additively to CCSM3, isotopes in Sphagnum stems explained some WTD variation reconstructed by TAEU and PM, suggesting a more critical role of the microtopographic position for these proxies. Our results suggest that TA reconcile multiple equivocal reconstructions, reveal subtle fluctuations only occasionally reported by other proxies, and are less affected by climate-independent microtopography. However, the inclusion of PM in palaeoclimatic studies is essential to verify the continuous ombrotrophy of recent bogs.

Návaznosti

CZ.02.01.01/00/22_008/0004593, interní kód MU

Název: Připraveni na budoucnost: porozumění dlouhodobé odolnosti lidské kultury (RES-HUM)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Připraveni na budoucnost: porozumění dlouhodobé odolnosti lidské kultury (RES-HUM), Priorita 1 - Výzkum a vývoj

EH22_008/0004593, projekt VaV

Název: Připraveni na budoucnost: porozumění dlouhodobé odolnosti lidské kultury (RES-HUM)

GA23-05132S, projekt VaV

Název: Nové kalibrační a indikační systémy pro rekonstrukci holocenního klimatu zohledňující lokální vývoj

Investor: Grantová agentura ČR, Nové kalibrační a indikační systémy pro rekonstrukci holocenního klimatu zohledňující lokální vývoj

Citovat

ŠÍMOVÁ, Anna; Petra HÁJKOVÁ; Libor PETR; Jan DIVÍŠEK; Kateřina KINTROVÁ a Michal HÁJEK. Testate amoebae in an ombrotrophic bog reconcile equivocal palaeoclimate reconstructions for the Western Carpathians. Quaternary Science Reviews. Elsevier, 2025, roč. 349, February, s. 1-19. ISSN 0277-3791. Dostupné z: https://doi.org/10.1016/j.quascirev.2024.109062.

@article{2527817,
   author = {Šímová, Anna and Hájková, Petra and Petr, Libor and Divíšek, Jan and Kintrová, Kateřina and Hájek, Michal},
   article_number = {February},
   doi = {https://doi.org/10.1016/j.quascirev.2024.109062},
   keywords = {Plant macrofossils; Pollen; Quantitative reconstructions; Stable isotopes; Testate amoebae; Transfer functions},
   language = {eng},
   issn = {0277-3791},
   journal = {Quaternary Science Reviews},
   title = {Testate amoebae in an ombrotrophic bog reconcile equivocal palaeoclimate reconstructions for the Western Carpathians},
   url = {https://doi.org/10.1016/j.quascirev.2024.109062},
   volume = {349},
   year = {2025}
}

TY  - JOUR
ID  - 2527817
AU  - Šímová, Anna - Hájková, Petra - Petr, Libor - Divíšek, Jan - Kintrová, Kateřina - Hájek, Michal
PY  - 2025
TI  - Testate amoebae in an ombrotrophic bog reconcile equivocal palaeoclimate reconstructions for the Western Carpathians
JF  - Quaternary Science Reviews
VL  - 349
IS  - February
SP  - 1-19
EP  - 1-19
PB  - Elsevier
SN  - 02773791
KW  - Plant macrofossils
KW  - Pollen
KW  - Quantitative reconstructions
KW  - Stable isotopes
KW  - Testate amoebae
KW  - Transfer functions
UR  - https://doi.org/10.1016/j.quascirev.2024.109062
N2  - Knowledge about climate changes is crucial for understanding past and current anthropogenic ecosystem changes, 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. Here, 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 (513C and 518O), 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. Both the regional (TAREG, PM) and continental (TAEU) calibration training sets were used for quantitative WTD reconstructions. 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 100-200 years delayed increase in fir pollen at the expense of spruce. For the last ca 230 years, 513C and TA suggest that the bog had experienced unprecedented drought. The bog was dominated by Sphagnum rubellumdwarf 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 the beginning of the Bronze Age, allowing human colonisation of previously harsh mountain areas. The consistency with CCSM3 was the highest for TAREG-inferred WTD and lowest for 518O. The temperature and precipitation of the warmest quarter were the most influential explanatory variables in multiple regression. Additively to CCSM3, isotopes in Sphagnum stems explained some WTD variation reconstructed by TAEU and PM, suggesting a more critical role of the microtopographic position for these proxies. Our results suggest that TA reconcile multiple equivocal reconstructions, reveal subtle fluctuations only occasionally reported by other proxies, and are less affected by climate-independent microtopography. However, the inclusion of PM in palaeoclimatic studies is essential to verify the continuous ombrotrophy of recent bogs.
ER  -

ŠÍMOVÁ, Anna; Petra HÁJKOVÁ; Libor PETR; Jan DIVÍŠEK; Kateřina KINTROVÁ a Michal HÁJEK. Testate amoebae in an ombrotrophic bog reconcile equivocal palaeoclimate reconstructions for the Western Carpathians. \textit{Quaternary Science Reviews}. Elsevier, 2025, roč.~349, February, s.~1-19. ISSN~0277-3791. Dostupné z: https://doi.org/10.1016/j.quascirev.2024.109062.

Přehled o publikaci