Estimating the Relevant Source Area of Pollen in the past cultural landscapes of southern Sweden — A forward modelling approach

Hellman, Sofie; Gaillard, Marie-José; Bunting, Jane; Mazier, Florence

doi:10.1016/j.revpalbo.2008.08.008

Cited by 73 publications

(52 citation statements)

References 30 publications

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“…Thus, extrapolation from the woodland patch-size versus RSAP in Switzerland and Estonia to the size of forest patches in Brandenburg may explain the large RSAP obtained. This example shows the dependency of RSAP on the patch size (Bunting et al 2004;Hellman et al 2009) for the selected lakes and indicates large effective patch size for the region investigated here.…”

Section: Rsapmentioning

confidence: 71%

“…The full dataset has a lake size distribution with a stronger skew to the right but yields a similar RSAP. It is most likely that the result is in fact due to the distribution of vegetation types and forest species in the study area, which is a well-known factor controlling the size of the RSAP (Sugita et al 1999;Bunting et al 2004;Nielsen and Sugita 2005;Hellman et al 2009). Soil substrate, and therefore nutrient and water availability in north-east Germany are linked to the glacial geomorphology of the area.…”

Section: Rsapmentioning

confidence: 99%

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Evaluating the effect of flowering age and forest structure on pollen productivity estimates

Matthias

Nielsen

Giesecke

2012

Veget Hist Archaeobot

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Pollen productivity estimates (PPEs) are indispensable prerequisites for quantitative vegetation reconstructions. Estimates from different European regions show a large variability and it is uncertain whether this reflects regional differences in climate and soil or is brought about by different assessments of vegetation abundance. Forests represent a particular problem as they consist of several layers of vegetation and many tree species only start producing pollen after they have attained ages of several decades. Here we used detailed forest inventory data from north-eastern Germany to investigate the effect of flowering age and understory trees on PPEs. Pollen counts were obtained from 49 small to medium sized lakes chosen to represent the different forest types in the region. Surface samples from lakes within a closed forest of Fagus yielded disproportionate amounts of Fagus pollen, increasing its PPE and the variability of all other estimates. These samples were removed from further analysis but indicate a high trunk-space component that is not considered in the Prentice-Sugita pollen dispersal and deposition model. Results of the restricted dataset show important differences in PPEs based on the consideration of flowering age and understory position. The effect is largest for slow growing and/or late flowering trees like Fagus and Carpinus while it is minimal for species that flower early in their development like Betula and Alnus. The large relevant source area of pollen (RSAP) of 7 km obtained in this study is consistent with the landscape structure of the region.

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Section: Rsapmentioning

confidence: 71%

Section: Rsapmentioning

confidence: 99%

Evaluating the effect of flowering age and forest structure on pollen productivity estimates

Matthias

Nielsen

Giesecke

2012

Veget Hist Archaeobot

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“…size, frequency and duration). Combinations of pollen-based reconstructions of past landscape, including the LRA-and QAD-based approaches, together with the historical maps enabled us to evaluate the reliability of the local vegetation and land-use estimates (Berglund 1991;Nielsen 2004;Dahlström 2008;Hellman et al 2009b). Historical maps and aerial photographs were invaluable to describe spatiotemporal dynamics of land-use patterns in detail, for a better understanding of the effects of the past land-use practices on the modern landscape (Skånes and Bunce 1997;Cousins 2001;Johansson et al 2008).…”

Section: Implications For Long-term Environmental Analysesmentioning

confidence: 99%

Two hundred years of land-use change in the South Swedish Uplands: comparison of historical map-based estimates with a pollen-based reconstruction using the landscape reconstruction algorithm

Mazier

Broström

Bragée

et al. 2015

Veget Hist Archaeobot

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“…Therefore future work to determine stages of flowering behaviour in other coppiced taxa, and to determine if the effects are the same from other management activities such as pollarding, shredding and layering, will enable better incorporation of woodland management into both simulation studies of pollen signals from prehistoric landscapes (Hellman, et al 2009b) and in reconstructions of past vegetation from pollen assemblages.…”

mentioning

confidence: 99%

Approaches to quantitative reconstruction of woody vegetation in managed woodlands from pollen records

Bunting

Grant

Waller

2016

Review of Palaeobotany and Palynology

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Please cite this article as: Bunting, M.J., Grant, M.J., Waller, M., Approaches to quantitative reconstruction of woody vegetation in managed woodlands from pollen records, Review of Palaeobotany and Palynology (2015), doi: 10.1016/j.revpalbo.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.A C C E P T E D M A N U S C R I P T Oceanography Centre Southampton, University of Southampton, European Way, Southampton, ACCEPTED MANUSCRIPT SO14 3ZHC Department of Geography and Geology, Kingston University, Penrhyn Road, Kingston upon Thames, AbstractThere has been increasing interest in developing quantitative methods for reconstructing the dynamics of cultural landscapes over the last 15 years. This paper adds to this literature by using various approaches to reconstruct the vegetation of two woodlands subject to rotational coppicing (the periodic cutting of broadleaved trees and shrubs for wood products). Pollen deposition at ground level was determined at both sites using 'Tauber' traps placed near to the centre of 14 compartments of differing age in the coppice rotation.For the main woody taxa, Relative Pollen Productivity (RPP) estimates were derived using linear regression for pollen influx data and Extended R-value analysis for percentage data.The vegetation around three ponds was reconstructed by applying four methods (inverting the two RPP estimate approaches, the modern analogue technique and correction for pollen productivity using the linear regression estimated RPP values) to pollen data obtained from the uppermost sample of sediment from the ponds. To determine whether these methods gave better estimates of the vegetation composition than the original pollen proportions, the results were compared with the surveyed vegetation around each pond using the BrayCurtis Index. Linear regression of pollen influx produced RPP values which are comparable with previous European studies, while for some taxa the Extended R-value analysis produced estimates which are orders of magnitude different both from values derived from the linear regression and previous work. No single approach performed equally well at reconstructing the vegetation around the ponds, and at two of the three locations the uncorrected pollen proportions were most similar to the surveyed vegetation. We conclude that applying quantitative reconstruction methods to individual small sites is, currently, not likely to be useful in complex cultural landscapes. In the context of coppiced woodland, A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT3 deficiencies in our understanding of pollen taphonomy and the impact of the practice on polle...

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Estimating the Relevant Source Area of Pollen in the past cultural landscapes of southern Sweden — A forward modelling approach

Cited by 73 publications

References 30 publications

Evaluating the effect of flowering age and forest structure on pollen productivity estimates

Evaluating the effect of flowering age and forest structure on pollen productivity estimates

Two hundred years of land-use change in the South Swedish Uplands: comparison of historical map-based estimates with a pollen-based reconstruction using the landscape reconstruction algorithm

Approaches to quantitative reconstruction of woody vegetation in managed woodlands from pollen records

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