Giesecke, Thomas

[["dc.bibliographiccitation.firstpage","127"],["dc.bibliographiccitation.journal","Ecological Complexity"],["dc.bibliographiccitation.lastpage","141"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Pirzamanbein, Behnaz"],["dc.contributor.author","Lindstrom, Johan"],["dc.contributor.author","Poska, Anneli"],["dc.contributor.author","Sugita, Shinya"],["dc.contributor.author","Trondman, Anna-Kari"],["dc.contributor.author","Fyfe, Ralph M."],["dc.contributor.author","Mazier, Florence"],["dc.contributor.author","Nielsen, Anne B."],["dc.contributor.author","Kaplan, Jed O."],["dc.contributor.author","Bjune, Anne E."],["dc.contributor.author","Birks, H. John B."],["dc.contributor.author","Giesecke, Thomas"],["dc.contributor.author","Kangur, Mikhel"],["dc.contributor.author","Latalowa, Malgorzata"],["dc.contributor.author","Marquer, Laurent"],["dc.contributor.author","Smith, Benjamin"],["dc.contributor.author","Gaillard, Marie-Jose"],["dc.date.accessioned","2018-11-07T09:31:43Z"],["dc.date.available","2018-11-07T09:31:43Z"],["dc.date.issued","2014"],["dc.description.abstract","Reliable estimates of past land cover are critical for assessing potential effects of anthropogenic land-cover changes on past earth surface-climate feedbacks and landscape complexity. Fossil pollen records from lakes and bogs have provided important information on past natural and human-induced vegetation cover. However, those records provide only point estimates of past land cover, and not the spatially continuous maps at regional and sub-continental scales needed for climate modelling. We propose a set of statistical models that create spatially continuous maps of past land cover by combining two data sets: 1) pollen-based point estimates of past land cover (from the REVEALS model) and 2) spatially continuous estimates of past land cover, obtained by combining simulated potential vegetation (from LPJ-GUESS) with an anthropogenic land-cover change scenario (KK10). The proposed models rely on statistical methodology for compositional data and use Gaussian Markov Random Fields to model spatial dependencies in the data. Land-cover reconstructions are presented for three time windows in Europe: 0.05, 0.2, and 6 ka years before present (BP). The models are evaluated through cross-validation, deviance information criteria and by comparing the reconstruction of the 0.05 ka time window to the present-day land-cover data compiled by the European Forest Institute (EFI). For 0.05 ka, the proposed models provide reconstructions that are closer to the EFI data than either the REVEALS- or LPJ-GUESS/KK10-based estimates; thus the statistical combination of the two estimates improves the reconstruction. The reconstruction by the proposed models for 0.2 ka is also good. For 6 ka, however, the large differences between the REVEALS- and LPJ-GUESS/KK10-based estimates reduce the reliability of the proposed models. Possible reasons for the increased differences between REVEALS and LPJ-GUESS/KK10 for older time periods and further improvement of the proposed models are discussed. (C) 2014 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.ecocom.2014.09.005"],["dc.identifier.isi","000348010800013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31596"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1476-9840"],["dc.relation.issn","1476-945X"],["dc.title","Creating spatially continuous maps of past land cover from point estimates: A new statistical approach applied to pollen data"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","20"],["dc.bibliographiccitation.journal","Quaternary Science Reviews"],["dc.bibliographiccitation.lastpage","37"],["dc.bibliographiccitation.volume","171"],["dc.contributor.author","Marquer, Laurent"],["dc.contributor.author","Gaillard, Marie-José"],["dc.contributor.author","Sugita, Shinya"],["dc.contributor.author","Poska, Anneli"],["dc.contributor.author","Trondman, Anna-Kari"],["dc.contributor.author","Mazier, Florence"],["dc.contributor.author","Nielsen, Anne Birgitte"],["dc.contributor.author","Fyfe, Ralph M."],["dc.contributor.author","Jönsson, Anna Maria"],["dc.contributor.author","Smith, Benjamin"],["dc.contributor.author","Kaplan, Jed O."],["dc.contributor.author","Alenius, Teija"],["dc.contributor.author","Birks, H. John B."],["dc.contributor.author","Bjune, Anne E."],["dc.contributor.author","Christiansen, Jörg"],["dc.contributor.author","Dodson, John"],["dc.contributor.author","Edwards, Kevin J."],["dc.contributor.author","Giesecke, Thomas"],["dc.contributor.author","Herzschuh, Ulrike"],["dc.contributor.author","Kangur, Mihkel"],["dc.contributor.author","Koff, Tiiu"],["dc.contributor.author","Latałowa, Małgorzata"],["dc.contributor.author","Lechterbeck, Jutta"],["dc.contributor.author","Olofsson, Jörgen"],["dc.contributor.author","Seppä, Heikki"],["dc.date.accessioned","2020-12-10T15:21:00Z"],["dc.date.available","2020-12-10T15:21:00Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1016/j.quascirev.2017.07.001"],["dc.identifier.issn","0277-3791"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72882"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Quantifying the effects of land use and climate on Holocene vegetation in Europe"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","54"],["dc.bibliographiccitation.journal","Quaternary Science Reviews"],["dc.bibliographiccitation.lastpage","65"],["dc.bibliographiccitation.volume","146"],["dc.contributor.author","Rodrigues, Jackson Martins"],["dc.contributor.author","Behling, Hermann"],["dc.contributor.author","Giesecke, Thomas"],["dc.date.accessioned","2018-11-07T10:10:09Z"],["dc.date.available","2018-11-07T10:10:09Z"],["dc.date.issued","2016"],["dc.description.abstract","At mid to high northern latitudes postglacial vegetation change has often occurred synchronously over large regions triggered mainly by abrupt climate change. Based on 19 pollen diagrams from southern and southeastern Brazil we explore if similar synchronicities in vegetation change were also characteristic for the vegetation dynamics in low latitudes. We used sequence splitting to detect past vegetation change in the pollen diagrams and computed principal curves and rates of change to visually evaluate the changes in composition and dynamics. The results show that vegetation change occurred mostly during the second half of the Holocene with distinct episodes of change. The character of vegetation change is generally consistent with shifts to wetter conditions and agrees with inferred shifts of the South American Monsoon. Speleothems as well as the titanium record from the Cariaco Basin indicate several episodes of rapid shifts in the precipitation regime, which are within the dating uncertainty of the here detected periods of vegetation change (8900, 5900, 2800, 1200 and 550 cal yrs BP). Our results indicate that low latitude vegetation composition follows precession forcing of the hydrology, while change is often triggered and synchronized by rapid climate change much like in high and mid latitudes. Pollen diagrams document changes in the abundance of individual taxa and changes in the amount of woodland cover, while small compositional changes indicate a regional stability of vegetation types during the Holocene. (C) 2016 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.quascirev.2016.06.011"],["dc.identifier.isi","000381234000003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39801"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0277-3791"],["dc.title","Holocene dynamics of vegetation change in southern and southeastern Brazil is consistent with climate forcing"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Nature Communications"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Giesecke, Thomas"],["dc.contributor.author","Wolters, Steffen"],["dc.contributor.author","van Leeuwen, Jacqueline F. N."],["dc.contributor.author","van der Knaap, Pim W. O."],["dc.contributor.author","Leydet, Michelle"],["dc.contributor.author","Brewer, Simon"],["dc.date.accessioned","2020-12-10T18:09:52Z"],["dc.date.available","2020-12-10T18:09:52Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1038/s41467-019-13233-y"],["dc.identifier.eissn","2041-1723"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16828"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73783"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Postglacial change of the floristic diversity gradient in Europe"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Review of Palaeobotany and Palynology"],["dc.bibliographiccitation.lastpage","25"],["dc.bibliographiccitation.volume","228"],["dc.contributor.author","Birks, H. John B."],["dc.contributor.author","Felde, Vivian A."],["dc.contributor.author","Bjune, Anne E."],["dc.contributor.author","Grytnes, John-Arvid"],["dc.contributor.author","Seppa, Heikki"],["dc.contributor.author","Giesecke, Thomas"],["dc.date.accessioned","2018-11-07T10:15:04Z"],["dc.date.available","2018-11-07T10:15:04Z"],["dc.date.issued","2016"],["dc.description.abstract","Current interest and debate on pollen-assemblage richness as a proxy for past plant richness have prompted us to review recent developments in assessing whether modern pollen-assemblage richness reflects contemporary floristic richness. We present basic definitions and outline key terminology. We summarise four basic needs in assessing pollen-plant richness relationships - modern pollen data, modern vegetation data, pollen-plant translation tables, and quantification of the co-variation between modern pollen and vegetation compositional data. We discuss three key estimates and one numerical tool - richness estimation, evenness estimation, diversity estimation, and statistical modelling. We consider the inherent problems and biases in assessing pollen-plant richness relationships - taxonomic precision, pollen-sample:pollen-population ratios, pollen-representation bias, and underlying concepts of evenness and diversity. We summarise alternative approaches to studying pollen plant richness relationships. We show that almost all studies which have compared modern pollen richness with contemporary site-specific plant richness reveal good relationships between palynological richness and plant richness. We outline future challenges and research opportunities - interpreting past pollen-richness patterns, estimating richness from macrofossils, studying pollen richness at different scales, partitioning diversity and estimating beta diversity, estimating false, hidden, and dark richness, and considering past functional and phylogenetic diversity from pollen data. We conclude with an assessment of the current state-of-knowledge about whether pollen richness reflects floristic richness and explore what is known and unknown in our understanding of pollen-plant richness relationships. (C) 2016 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.revpalbo.2015.12.011"],["dc.identifier.isi","000374424800001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40739"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1879-0615"],["dc.relation.issn","0034-6667"],["dc.title","Does pollen-assemblage richness reflect floristic richness? A review of recent developments and future challenges"],["dc.type","review"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","S0277379121004984"],["dc.bibliographiccitation.firstpage","107291"],["dc.bibliographiccitation.journal","Quaternary Science Reviews"],["dc.bibliographiccitation.volume","276"],["dc.contributor.author","Álvarez-Barra, Valentina"],["dc.contributor.author","Giesecke, Thomas"],["dc.contributor.author","Fontana, Sonia L."],["dc.date.accessioned","2022-02-01T10:32:11Z"],["dc.date.available","2022-02-01T10:32:11Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1016/j.quascirev.2021.107291"],["dc.identifier.pii","S0277379121004984"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/99030"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-517"],["dc.relation.issn","0277-3791"],["dc.rights.uri","https://www.elsevier.com/tdm/userlicense/1.0/"],["dc.title","Holocene changes in forest composition in northern Patagonia responded to climate with little impact of disturbance"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","657"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","New Phytologist"],["dc.bibliographiccitation.lastpage","662"],["dc.bibliographiccitation.volume","222"],["dc.contributor.author","Finsinger, Walter"],["dc.contributor.author","Schwörer, Christoph"],["dc.contributor.author","Heiri, Oliver"],["dc.contributor.author","Morales‐Molino, César"],["dc.contributor.author","Ribolini, Adriano"],["dc.contributor.author","Giesecke, Thomas"],["dc.contributor.author","Haas, Jean Nicolas"],["dc.contributor.author","Kaltenrieder, Petra"],["dc.contributor.author","Magyari, Enikő K."],["dc.contributor.author","Ravazzi, Cesare"],["dc.contributor.author","Rubiales, Juan Manuel"],["dc.contributor.author","Tinner, Willy"],["dc.date.accessioned","2020-12-10T18:36:15Z"],["dc.date.available","2020-12-10T18:36:15Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1111/nph.15354"],["dc.identifier.eissn","1469-8137"],["dc.identifier.issn","0028-646X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/76567"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Fire on ice and frozen trees? Inappropriate radiocarbon dating leads to unrealistic reconstructions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","231"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","The Holocene"],["dc.bibliographiccitation.lastpage","244"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Eckstein, Jan"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.contributor.author","Giesecke, Thomas"],["dc.contributor.author","Shumilovskikh, Lyudmila S."],["dc.contributor.author","Bauerochse, Andreas"],["dc.date.accessioned","2018-11-07T08:45:27Z"],["dc.date.available","2018-11-07T08:45:27Z"],["dc.date.issued","2010"],["dc.description.abstract","Excellently preserved subfossil pine and oak tree remains from the bottom layer of raised bog peat were dendroecologically investigated at Venner Moor (northwest Germany). Tree-ring analyses were combined with observations of stem and root morphology, preservation state, mineral soil relief, peat stratigraphy and pollen analysis to reconstruct in great detail environmental changes leading to the start of the raised bog formation. Hydrology was identified as the main determinant influencing tree growth and population dynamics at Venner Moor, as documented by different growth patterns and dying-off dates in relation to the mineral soil elevation. The woodland phase has been dendrochronological dated to the period from 2421-2077 BC (4371-4027 cal BP). In this period, a general change from more or less open landscape with dominating heath to wet pine forest and eventually to open raised bog occurred at the site. Comparisons with pine population dynamics at the nearby Voerdener Moor and with the independent Lower Saxony log yak Chronology (LSBOC) indicate that the reconstructed ecological changes at Venner Moor are mainly triggered by climate variations, in particular wet shifts on the decadal timescale. This example shows the value of subfossil pine layers from northwest German bogs as a high resolution proxy archive of Holocene humidity fluctuations."],["dc.description.sponsorship","German Research Foundation [LE 1805/2-1]"],["dc.identifier.doi","10.1177/0959683609350397"],["dc.identifier.isi","000274900800008"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13085"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20445"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0959-6836"],["dc.relation.orgunit","Abteilung Palynologie und Klimadynamik"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Dendroecological investigations at Venner Moor (northwest Germany) document climate-driven woodland dynamics and mire development in the period 2450-2050 BC"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","387"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Vegetation History and Archaeobotany"],["dc.bibliographiccitation.lastpage","403"],["dc.bibliographiccitation.volume","25"],["dc.contributor.author","Rodrigues, Jackson Martins"],["dc.contributor.author","Behling, Hermann"],["dc.contributor.author","Giesecke, Thomas"],["dc.date.accessioned","2018-11-07T10:12:31Z"],["dc.date.available","2018-11-07T10:12:31Z"],["dc.date.issued","2016"],["dc.description.abstract","In south and southeast Brazil land use caused profound changes in natural vegetation and consequently the value of the pollen composition in surface samples as modern analogues. In order to test the capability of modern pollen to represent the natural vegetation, three different time slices of pollen assemblages from 27 sites spread over southern and south-eastern Brazil and the Misiones Province in Argentina were collated. Pollen samples from the pre-colonization period, selected from the moment just before abrupt changes evidenced on pollen diagrams caused by the colonization process throughout the last 500 years, were assumed to represent the natural vegetation conditions once the climate remained stable within this period. Thus we used pre-colonization assemblages to compare with modern samples to explore to what extent surface pollen may be biased in representing the natural vegetation types. Furthermore, to compare man made vegetation change to climate driven vegetation change we also compared to these 20 out of 27 samples dated to 3,000 years bp. Guided by ordination and cluster analysis, but using abundance thresholds of indicator taxa we classified the pollen spectra of pre-colonization time into seven groups consistent with the main vegetation types in the area. Ordination analyses capture the differentiation between grassland and forested vegetation and between tropical and subtropical vegetation types. Comparing the pre-colonization with other time slices we observed that based on Poaceae abundance, 70 and 85 % respectively of sites from 3,000 bp and modern assemblages maintained their classification. Based on finer classification criteria these values decreased to 40 and 52 % respectively. Square chord dissimilarity indicates that colonization impact altered the pollen composition as strongly as 3,000 years of climate induced vegetation change. The surface samples still represent important environmental gradients; however, their use as modern analogue requires careful treatment and eventual exclusion of highly impacted sites."],["dc.identifier.doi","10.1007/s00334-016-0558-y"],["dc.identifier.isi","000377460700006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40251"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1617-6278"],["dc.relation.issn","0939-6314"],["dc.title","Differentiating vegetation types from eastern South American ecosystems based on modern and subfossil pollen samples: evaluating modern analogues"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","416"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Journal of Vegetation Science"],["dc.bibliographiccitation.lastpage","426"],["dc.bibliographiccitation.volume","29"],["dc.contributor.author","Shumilovskikh, Lyudmila S."],["dc.contributor.author","Novenko, Elena"],["dc.contributor.author","Giesecke, Thomas"],["dc.date.accessioned","2020-12-10T18:29:06Z"],["dc.date.available","2020-12-10T18:29:06Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1111/jvs.12585"],["dc.identifier.issn","1100-9233"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/76529"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.orgunit","Abteilung Palynologie und Klimadynamik"],["dc.title","Long-term dynamics of the East European forest-steppe ecotone"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]