| 1. |
- Serge, M. A., et al.
(author)
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Testing the Effect of Relative Pollen Productivity on the REVEALS Model : A Validated Reconstruction of Europe-Wide Holocene Vegetation
- 2023
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In: Land. - : MDPI. - 2073-445X. ; 12:5
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Journal article (peer-reviewed)abstract
- Reliable quantitative vegetation reconstructions for Europe during the Holocene are crucial to improving our understanding of landscape dynamics, making it possible to assess the past effects of environmental variables and land-use change on ecosystems and biodiversity, and mitigating their effects in the future. We present here the most spatially extensive and temporally continuous pollen-based reconstructions of plant cover in Europe (at a spatial resolution of 1 degrees x 1 degrees) over the Holocene (last 11.7 ka BP) using the 'Regional Estimates of VEgetation Abundance from Large Sites' (REVEALS) model. This study has three main aims. First, to present the most accurate and reliable generation of REVEALS reconstructions across Europe so far. This has been achieved by including a larger number of pollen records compared to former analyses, in particular from the Mediterranean area. Second, to discuss methodological issues in the quantification of past land cover by using alternative datasets of relative pollen productivities (RPPs), one of the key input parameters of REVEALS, to test model sensitivity. Finally, to validate our reconstructions with the global forest change dataset. The results suggest that the RPPs.st1 (31 taxa) dataset is best suited to producing regional vegetation cover estimates for Europe. These reconstructions offer a long-term perspective providing unique possibilities to explore spatial-temporal changes in past land cover and biodiversity.
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| 2. |
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| 3. |
- Lazarova, M., et al.
(author)
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Late pleistocene and holocene history of genus isoetes L. (Lycopodiophyta) in the Western Rhodope Mountains, Bulgaria. New palynological and palaeoecological data
- 2012
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In: Comptes Rendus de l'Academie Bulgare des Sciences / Proceedings of the Bulgarian Academy of Sciences. - 1310-1331 .- 2367-5535. ; 65:10, s. 1405-1410
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Journal article (peer-reviewed)abstract
- The genus Isoetes is represented in Bulgaria by one species I. lacustris L. (lake quillwort). It inhabits the littoral areas of some lakes in the Pirin Mountain range. Fossil records of Isoetes in Bulgaria are very scarce. A new palynological study was conducted on sediments collected from Kupena Mire in the Western Rhodope Mountains. The results indicated that lake quillwort was abundant 30 000 years ago and its growth was associated with the presence of shallow lake basins. The species disappeared from the composition of the local flora as the sedimentation regime changed from lacustrine to marsh after the warming of the climate at the onset of the Holocene. This study confirmed the existence of refugial areas during the last glaciation in the mountains of Southeastern Europe, where a number of glacial relics had survived.
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| 4. |
- Tonkov, S., et al.
(author)
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On the Holocene history of sweet chestnut forests in Belasitsa mountain, Southwestern Bulgaria
- 2012
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In: Comptes Rendus de l'Academie Bulgare des Sciences / Proceedings of the Bulgarian Academy of Sciences. - 1310-1331 .- 2367-5535. ; 65:11, s. 1549-1554
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Journal article (peer-reviewed)abstract
- The Holocene history of sweet chestnut (Castanea sativa Mill.) on the northern slopes of Belasitsa Mountain was studied by pollen analysis and radiocarbon dating of a core collected from a small mire. The results showed that more than 8000 years ago this tree was spontaneously growing in the mountain before the first Neolithic inhabitants settled in the Struma River Valley and its tributaries. The enlargement of the areas occupied by sweet chestnut started with its wide cultivation since the time of the Roman colonization. The new palynological information supports the hypothesis for possible existence of refugia for Castanea sativa in Southwestern Bulgaria.
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