A5060294656- Geology and Paleoclimatology Research
- Tree-ring climate responses
- Plant Ecology and Soil Science
- Archaeology and ancient environmental studies
- Pleistocene-Era Hominins and Archaeology
- Lichen and fungal ecology
- Botany and Plant Ecology Studies
- Peatlands and Wetlands Ecology
- Ecology and Vegetation Dynamics Studies
- Image Processing and 3D Reconstruction
- Fire effects on ecosystems
- Scientific Research and Discoveries
- Isotope Analysis in Ecology
- Historical and Archaeological Studies
- Forest Ecology and Biodiversity Studies
- Geological formations and processes
- Geochemistry and Geologic Mapping
- Aeolian processes and effects
- Marine and environmental studies
- Species Distribution and Climate Change
- African Botany and Ecology Studies
- Geomagnetism and Paleomagnetism Studies
- Land Use and Ecosystem Services
- Landslides and related hazards
- Paleontology and Stratigraphy of Fossils
Linnaeus University
2015-2024
Lund University
1984-2021
RMIT University
2009
International Union for Pure and Applied Biophysics
2008
Växjö Kommun
1999-2002
Quantitative reconstruction of the area cleared forest in past is essential to assess possible indirect anthropogenic impacts on environment Europe, including climate. We apply a simul ation model pollen dispersal and deposition (1) re-examine relationship between landscape openness, often uncritically inferred from non-arboreal (NAP) percentages alone, (2) predict relevant source pollen, smallest spatial scale vegetation that can be reconstructed records. The simulations use landscapes...
Abstract. The major objectives of this paper are: (1) to review the pros and cons scenarios past anthropogenic land cover change (ALCC) developed during last ten years, (2) discuss issues related pollen-based reconstruction land-cover introduce a new method, REVEALS (Regional Estimates VEgetation Abundance from Large Sites), infer long-term records pollen data, (3) present project (LANDCLIM: LAND – CLIMate interactions in NW Europe Holocene) currently underway, show preliminary results...
Abstract We present quantitative reconstructions of regional vegetation cover in north‐western Europe, western Europe north the Alps, and eastern for five time windows Holocene [around 6k, 3k, 0.5k, 0.2k, 0.05k calendar years before ( bp )] at a 1° × spatial scale with objective producing descriptions suitable climate modelling. The REVEALS model was applied on 636 pollen records from lakes bogs to reconstruct past 25 plant taxa grouped into 10 plant‐functional types three land‐cover...
8000 years ago, prior to Neolithic agriculture, Europe was mostly a wooded continent. Since then, its forest cover has been progressively fragmented, so that today it covers less than half of Europe's land area, in many cases having cleared make way for fields and pasture-land. Establishing the origin current, more open land-cover mosaic requires long-term perspective, which pollen analysis offers key tool. In this study we utilise compare three numerical approaches transforming data into...
Abstract The REVEALS model was developed to reconstruct quantitatively regional vegetation abundance (in a 10 4 –10 5 km 2 area) from pollen assemblages in large lakes (≥100–500 ha). This corrects for biases percentages caused by inter‐taxonomic differences productivity and dispersal. paper presents the first case study validate REVEALS, using empirical data southern Sweden. Percentage cover of modern Skåne Småland, two contrasting regions, predicted with 26 key taxa, surface sediments...
Anthropogenic land cover change (ALCC) is the most important transformation of Earth system that occurred in preindustrial Holocene, with implications for carbon, water and sediment cycles, biodiversity provision ecosystem services regional global climate. For example, anthropogenic deforestation Eurasia may have led to feedbacks climate system: both biogeophysical, regionally amplifying winter cold summer warm temperatures, biogeochemical, stabilizing atmospheric CO 2 concentrations thus...
Abstract. This study aims to evaluate the direct effects of anthropogenic deforestation on simulated climate at two contrasting periods in Holocene, ~6 and ~0.2 k BP Europe. We apply Rossby Centre regional model RCA3, a with 50 km spatial resolution, for both time periods, considering three alternative descriptions past vegetation: (i) potential natural vegetation (V) by dynamic LPJ-GUESS, (ii) land use (deforestation) from HYDE3.1 (History Database Global Environment) scenario (V + H3.1),...
In this paper we test the performance of Regional Estimates VEgetation Abundance from Large Sites (REVEALS) model using pollen records multiple small sites. We use Holocene large and sites in southern Sweden to identify what is/are most significant variable(s) affecting REVEALS-based reconstructions, i.e. type site (lakes and/or bogs), number sites, size, location relation vegetation zones, distance between To achieve objective grouped according (i) two major modern zones study region, (ii)...
In the 12,000 years preceding Industrial Revolution, human activities led to significant changes in land cover, plant and animal distributions, surface hydrology, biochemical cycles. Earth system models suggest that this anthropogenic cover change influenced regional global climate. However, representation of past use earth is currently oversimplified. As a result, there are large uncertainties current understanding state system. order improve variety scale impacts had on system, effort...
Reliable quantitative vegetation reconstructions for Europe during the Holocene are crucial to improving our understanding of landscape dynamics, making it possible assess past effects environmental variables and land-use change on ecosystems biodiversity, mitigating their in future. We present here most spatially extensive temporally continuous pollen-based plant cover (at a spatial resolution 1° × 1°) over (last 11.7 ka BP) using ‘Regional Estimates VEgetation Abundance from Large Sites’...
In this study archaeology, history and palaeoecology (modern fossil data sets of pollen non-pollen palynomorphs) were used to reconstruct small-scale pastoral activities in the Pyrenees Mountains during last two millennia. Modern assemblages from major vegetation units (both natural anthropogenic) are studied on one restricted watershed area. A correlative model (RDA) 61 modern spectra 35 external variables distinguishes groups taxa, providing information nature spatial extent human impact...
Northern peatlands store globally-important amounts of carbon in the form partly decomposed plant detritus. Drying associated with climate and land-use change may lead to increased fire frequency severity rapid loss atmosphere. However, our understanding patterns drivers peatland burning on an appropriate decadal millennial timescale relies heavily individual site-based reconstructions. For first time, we synthesise macrocharcoal records from across North America, Europe, Patagonia reveal...
The two major aims of this study are (1) To test the performance Landscape Reconstruction Algorithm (LRA) to quantify past landscape changes using historical maps and related written sources, (2) use LRA map reconstructions for a better understanding origin diversity recent loss species diversity. Southern Sweden, hemiboreal vegetation zone. was applied on pollen records from three small bogs four time windows between AD 1700 2010. estimates % cover woodland/forest, grassland, wetland,...
Abstract We review palaeoenvironmental proxies and combinations of these relevant for understanding hunter-gatherer niche construction activities in pre-agricultural Europe. Our approach consists two steps: (1) identify the possible range impacts on landscapes based ethnographic studies; (2) evaluate possibly reflecting both Eemian (Last Interglacial, Middle Palaeolithic) Early–Middle Holocene (Mesolithic). found paleoenvironmental were not able to unequivocally establish clear-cut...
Mineral magnetic, organic carbon and pollen studies of two varved Holocene lake-sediment sequences in the boreal forest northern Sweden indicate that signi” cant environmental changes took place between c. 6000 5700 bc. This interval is characterized by an increase mineral-matter accumulation, which a proxy for winter-snow statistically decrease total in‘ ux (predominantly Pinus, Betula Alnus), may re‘ ect lower spring summer temperatures increased frost frequency. Notable increases...