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The transformation ...
The transformation of the forest steppe in the lower Danube Plain of southeastern Europe : 6000 years of vegetation and land use dynamics
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- Feurdean, Angelica (författare)
- Babes Bolyai University,Goethe University,Senckenberg Biodiversity and Climate Research Centre
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- Grindean, Roxana (författare)
- Babes Bolyai University
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- Florescu, Gabriela (författare)
- Babes Bolyai University,Stefan cel Mare University of Suceava,Charles University in Prague
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- Tantǎu, Ioan (författare)
- Babes Bolyai University
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- Niedermeyer, Eva M. (författare)
- Senckenberg Biodiversity and Climate Research Centre
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- Diaconu, Andrei Cosmin (författare)
- Babes Bolyai University
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- Hutchinson, Simon M. (författare)
- University of Salford
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- Nielsen, Anne Brigitte (författare)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kvartärgeologi,Geologiska institutionen,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Quaternary Sciences,Department of Geology,Dept of Physical Geography and Ecosystem Science
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- Sava, Tiberiu (författare)
- Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH)
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- Panait, Andrei (författare)
- Babes Bolyai University
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- Braun, Mihaly (författare)
- Hungarian Academy of Sciences
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- Hickler, Thomas (författare)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Goethe University,Senckenberg Biodiversity and Climate Research Centre
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(creator_code:org_t)
- 2021-02-15
- 2021
- Engelska 23 s.
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Ingår i: Biogeosciences. - : Copernicus GmbH. - 1726-4170 .- 1726-4189. ; 18:3, s. 1081-1103
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://bg.copernicu...
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https://lup.lub.lu.s...
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https://doi.org/10.5...
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Abstract
Ämnesord
Stäng
- Forest steppes are dynamic ecosystems, highly susceptible to changes in climate, disturbances and land use. Here we examine the Holocene history of the European forest steppe ecotone in the lower Danube Plain to better understand its sensitivity to climate fluctuations, fire and human impact, and the timing of its transition into a cultural forest steppe. We used multi-proxy analyses (pollen, n-alkanes, coprophilous fungi, charcoal and geochemistry) of a 6000- year sequence from Lake Oltina (southeastern Romania) combined with a REVEALS (Regional Estimates of Vegetation Abundance from Large Sites) model of quantitative vegetation cover. We found a greater tree cover, composed of xerothermic (Carpinus orientalis and Quercus) and temperate (Carpinus betulus, Tilia, Ulmus and Fraxinus) tree taxa, between 6000 and 2500 cal yr BP. Maximum tree cover (~50 %), dominated by C. orientalis occurred between 4200 and 2500 cal yr BP at a time of wetter climatic conditions and moderate fire activity. Compared to other European forest steppe areas, the dominance of C. orientalis represents the most distinct feature of the woodland's composition at this time. Tree loss was underway by 2500 yr BP (Iron Age), with the REVEALS model indicating a fall to ~20% tree cover from the Late Holocene forest maximum, linked to clearance for agriculture, while climate conditions remained wet. Biomass burning increased markedly at 2500 cal yr BP, suggesting that fire was regularly used as a management tool until 1000 cal yr BP when woody vegetation became scarce. A sparse tree cover, with only weak signs of forest recovery, then became a permanent characteristic of the lower Danube Plain, highlighting more or less continuous anthropogenic pressure. The timing of anthropogenic ecosystem transformation here (2500 cal yr BP) falls between that in centraleastern (between 3700 and 3000 cal yr BP) and eastern (after 2000 cal yr BP) Europe. Our study is the first quantitative land cover estimate at the forest steppe ecotone in southeastern Europe spanning 6000 years. It provides critical empirical evidence that, at a broad spatial scale, the present-day forest steppe and woodlands reflect the potential natural vegetation in this region under current climate conditions. However, the extent of tree cover and its composition have been neither stable in time nor shaped solely by the climate. Consequently, vegetation change must be seen as dynamic and reflecting wider changes in environmental conditions including natural disturbances and human impact.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)
Nyckelord
- Pollen analysis
- landscape reconstruction algorithm
- Forest steppe
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Feurdean, Angeli ...
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Grindean, Roxana
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Florescu, Gabrie ...
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Tantǎu, Ioan
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Niedermeyer, Eva ...
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Diaconu, Andrei ...
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Hutchinson, Simo ...
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Nielsen, Anne Br ...
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Sava, Tiberiu
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Panait, Andrei
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Braun, Mihaly
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Hickler, Thomas
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- NATURVETENSKAP
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Biogeosciences
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