Combining multiple proxies to investigate water table fluctuations in wetlands: A case study from the Rėkyva wetland complex, Lithuania

Research output: Contribution to journalArticle

Abstract

The impact climate and land-use changes have on the hydrological conditions in peat bogs and lakes is often complex, but of great importance for the carbon budget and biodiversity in these ecosystems. Links and feedbacks between raised bog water table depth, lake level, net precipitation, hydrometeorological indices, and radial tree growth have been studied and identified in the Rėkyva wetland complex, Lithuania. Moreover, several statistically significant correlations between raised bog water table depths, lake level, local river runoff, and tree growth were observed. The changes of raised bog water table, lake level, and tree growth show synchronous trends despite variations in the absolute values. Our results show decreasing water table in the Rėkyva wetland complex over the last 100 years, especially in the middle of the 20th century. This study also shows a potential for reconstructing water table fluctuations in wetland complexes using multi-indicator approaches. Our observations and reconstruction show consistency with several regional studies and reconstructions of moisture variations in Baltic raised bogs, at least for periods without strong anthropogenic influences.

Details

Authors
  • Julius Taminskas
  • Johannes Edvardsson
  • Rita Linkevičienė
  • Markus Stoffel
  • Christophe Corona
  • Marija Tamkevičiūtė
Organisations
External organisations
  • Vilnius University
  • University of Geneva
  • Laboratoire de Géographie Physique et Environnementale (GEOLAB)
  • State Scientific Institute Nature Research Centre
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Geology
  • Oceanography, Hydrology, Water Resources

Keywords

  • Climate change, Raised bog water table, Seepage lakes, Tree-ring, Wetland hydrology
Original languageEnglish
Pages (from-to)453-463
Number of pages11
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume514
Publication statusPublished - 2019
Publication categoryResearch
Peer-reviewedYes