Leuschner, Hanns Hubert

[["dc.bibliographiccitation.firstpage","171"],["dc.bibliographiccitation.journal","Review of Palaeobotany and Palynology"],["dc.bibliographiccitation.lastpage","178"],["dc.bibliographiccitation.volume","221"],["dc.contributor.author","Shumilovskikh, Lyudmila S."],["dc.contributor.author","Schluetz, Frank"],["dc.contributor.author","Achterberg, Inke"],["dc.contributor.author","Kvitkina, Anna"],["dc.contributor.author","Bauerochse, Andreas"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.date.accessioned","2018-11-07T09:51:12Z"],["dc.date.available","2018-11-07T09:51:12Z"],["dc.date.issued","2015"],["dc.description.abstract","Several laboratory experiments and field observations demonstrate that saprotrophic and ectomycorrhizal fungi effectively use pollen cytoplasm and suggest pollen produced by wind-pollinated trees as a crucial nutrient source for fungi and their plant hosts in nutrient-limited environments. However, the role of such interactions is still underestimated or neglected in ecology and paleoecology. Here, we consider pollen attacked by fungi in palynological records from Holocene raised peat bogs as a nutrient source for ecosystems in the past. The attacks occurred through the pollen germination areas by a variety of saprotrophic, ericoid mycorrhizal, ectomycorrhizal or dark septate endophyte fungi. Large amounts of attacked pollen in phases rich in Calluna vulgaris highlight the importance of Ericaceae shrubs, hosting ericoid mycorrhizal fungi and forming hotspots of decomposition in nutrient-deficit bogs. Applying estimations of pollen rain from literature, and based on own observed pollen infection rates we estimate the annual release of nitrogen, phosphate and potassium from pollen, and highlight their significance in pushing the ecosystem nutrient cycle in early spring time, when several species release their pollen. We highlight the significant role of anthropogenic changes in pollen deposition for pre-industrial bogs and hypothesize about the consequences of the pollen-based interrelation between wind-pollinated plants and their mycorrhizal fungi in paleoecology and evolution. (C) 2015 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.revpalbo.2015.07.001"],["dc.identifier.isi","000361777900016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35867"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1879-0615"],["dc.relation.issn","0034-6667"],["dc.relation.orgunit","Abteilung Palynologie und Klimadynamik"],["dc.title","Pollen as nutrient source in Holocene ombrotrophic bogs"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","129"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Dendrochronologia"],["dc.bibliographiccitation.lastpage","146"],["dc.bibliographiccitation.volume","27"],["dc.contributor.author","Eckstein, Jan"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.contributor.author","Bauerochse, Andreas"],["dc.contributor.author","Sass-Klaassen, Ute"],["dc.date.accessioned","2018-11-07T08:34:22Z"],["dc.date.available","2018-11-07T08:34:22Z"],["dc.date.issued","2009"],["dc.description.abstract","Extended dendrochronological investigations were performed on subfossil pine entombed in peat layers of former bogs in Lower Saxony (NW Germany). The aim was to study of dynamics in bog development in response to local environmental conditions and regional changes in climate throughout the Holocene. To date, 1702 samples have been collected from 36 locations. Crossdating with the Lower Saxony Bog Oak Chronology (LSBOC) resulted in five absolutely dated pine chronologies covering large parts of the period from 5600 BC to 2200 BC. Radiocarbon dating of eight additional chronologies extends this time-span from 7000 BC to 1500 BC. By combining dendrochronology with information on stratigraphic position as well as stem and root morphology we found that major changes in site hydrology cause changes in growth pattern and population dynamics of subfossil pine whereas storm and fire were of minor importance. The fact that shifts in growth patterns and population dynamics occurred simultaneously in trees from different sites indicates regional climate changes as main drivers of pines forest development in peatland ecosystems. (C) 2009 Elsevier GmbH. All rights reserved."],["dc.identifier.doi","10.1016/j.dendro.2009.06.007"],["dc.identifier.isi","000270017500006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17794"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.relation.conference","14th EuroDendro 2008"],["dc.relation.eventlocation","Hallstatt, AUSTRIA"],["dc.relation.issn","1125-7865"],["dc.title","Subfossil bog-pine horizons document climate and ecosystem changes during the Mid-Holocene"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","781"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Journal of Vegetation Science"],["dc.bibliographiccitation.lastpage","794"],["dc.bibliographiccitation.volume","22"],["dc.contributor.author","Eckstein, Jan"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.contributor.author","Bauerochse, Andreas"],["dc.date.accessioned","2018-11-07T08:51:33Z"],["dc.date.available","2018-11-07T08:51:33Z"],["dc.date.issued","2011"],["dc.description.abstract","Questionc Can investigations of subfossil bog-pine woodlands contribute to the understanding of mire development, especially the influence of climate fluctuations on the fen-bog transition? Location: Lowlands of northwest Germany. Methods: We investigated pine (Pinus sylvestris L.) tree remains (stumps and trunks) buried in peat deposits. Dendrochronology was used to date each sampled tree to calendar years and to reconstruct population dynamics of the pine woodlands. Ecological changes, especially changes in site hydrology during the pine woodland phases were inferred from peat stratigraphic analyses and investigations of stem and root morphology of the tree remains. Results: The subfossil pine woodlands occurred mostly during the transition from fen to raised bog conditions within the mire development. The population dynamics are strikingly wave-like whereas woodland phases of 100 to 250 years duration are separated by much shorter (10-50 years) phases of high germination and dying-off rates (GDO phases). Such GDO phases are often synchronous at different sites and are also linked to growth depressions of the independent regional oak master chronology (LSBOC), indicating a climate trigger. Conclusions: The development of raised bogs started about 7000 BC and had a main phase between 5100 and 3600 BC in northwest Germany. The subfossil bog-pine woodlands document the transitional phase towards the onset of raised bog formation, as characterized by initial dry conditions that were followed by increasing wetness of the sites, whereas this development is at least partly the result of climate variations."],["dc.description.sponsorship","German Research Foundation [LE 1805/2-1]"],["dc.identifier.doi","10.1111/j.1654-1103.2011.01283.x"],["dc.identifier.isi","000294561200003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21959"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1100-9233"],["dc.title","Mid-Holocene pine woodland phases and mire development - significance of dendroecological data from subfossil trees from northwest Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","643"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.lastpage","650"],["dc.bibliographiccitation.volumetitle","2200 BC – Ein Klimasturz als Ursache für den Zerfall der Alten Welt? 2200 BC – A climatic breakdown as a cause for the collapse of the old world?"],["dc.contributor.author","Bauerochse, Andreas"],["dc.contributor.author","Achterberg, Inke"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.contributor.editor","Meller, Harald"],["dc.contributor.editor","Arz, Helge Wolfgang"],["dc.contributor.editor","Jung, Reinhard"],["dc.contributor.editor","Risch, Roberto"],["dc.date.accessioned","2022-01-28T08:33:09Z"],["dc.date.available","2022-01-28T08:33:09Z"],["dc.date.issued","2015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/98711"],["dc.language.iso","en"],["dc.publisher","Landesamt für Denkmalpflege und Archäologie Sachsen-Anhalt – Landesmuseum für Vorgeschichte Halle (Saale)"],["dc.relation.conference","7. Mitteldeutscher Archäologentag"],["dc.relation.eventend","2014-10-26"],["dc.relation.eventlocation","Halle (Saale)"],["dc.relation.eventstart","2014-10-23"],["dc.relation.isbn","978-3-944507-29-3"],["dc.relation.ispartof","2200 BC – Ein Klimasturz als Ursache für den Zerfall der Alten Welt? 2200 BC – A climatic breakdown as a cause for the collapse of the old world?"],["dc.relation.orgunit","Abteilung Palynologie und Klimadynamik"],["dc.title","Evidence for climate change between 2200 BC and 2160 BC derived from subfossil bog and riverine trees from Germany"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","9"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Zeitschrift der Deutschen Gesellschaft für Geowissenschaften"],["dc.bibliographiccitation.lastpage","19"],["dc.bibliographiccitation.volume","168"],["dc.contributor.author","Achterberg, Inke"],["dc.contributor.author","Frechen, Manfred"],["dc.contributor.author","Bauerochse, Andreas"],["dc.contributor.author","Eckstein, Jan"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.date.accessioned","2018-11-07T10:26:50Z"],["dc.date.available","2018-11-07T10:26:50Z"],["dc.date.issued","2017"],["dc.description.abstract","To date, the tree-ring chronology of peat-preserved pines from Northwest Germany (Fig. 1) spans from 6703 BC to 1166 BC, but still contains two gaps. It was dated with the help of the previously constructed bog-oak chronology of Northwest Germany, the older part of which in turn has been dated using the pine chronology (Fig. 2), now covering from 6628 to 6178 BC additional to the previous span of 6069 BC to 931 AD. Compared to the oaks, chronology construction required large numbers of samples of the short-lived pine trees, many of which remained undated or dated relatively only. The dendrochronological process, which at times delivered a multitude of floating chronology fragments, was complemented by a number of radiocarbon dates. Preceding and following the calendar-dated pine chronology, there are radiocarbon dated floating chronologies. This pine record partly dates back to the beginning of the 9th millennium BC and documents environmental conditions during the early Holocene. It also shows the potential of the chronology to be extended further into the past. The Northwest German pine chronology has since been the base for dating i.a. archaeological finds, such as Neolithic wooden bog trackways. Moreover, the peat-preserved pines have proved to be valuable in palaeoenvironmental research, as they grew at sites where they were sensitive to hydrological changes. Particularly the climate-related advances of raised bog are well reflected in the material."],["dc.description.sponsorship","German Research Foundation DFG [LE 1805/1-2, FR877/16-1, HA4438/1]"],["dc.identifier.doi","10.1127/zdgg/2016/0042"],["dc.identifier.isi","000397029000003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43126"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","1860-1804"],["dc.relation.orgunit","Abteilung Palynologie und Klimadynamik"],["dc.title","The Gottingen tree-ring chronologies of peat-preserved oaks and pines from Northwest Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","183"],["dc.bibliographiccitation.issue","2-3"],["dc.bibliographiccitation.journal","Vegetation History and Archaeobotany"],["dc.bibliographiccitation.lastpage","195"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.contributor.author","Bauerochse, Andreas"],["dc.contributor.author","Metzler, Alf"],["dc.date.accessioned","2018-11-07T11:07:40Z"],["dc.date.available","2018-11-07T11:07:40Z"],["dc.date.issued","2007"],["dc.description.abstract","This paper presents a detailed dendroecological analysis of remains from a sub-fossil pine forest at the Campemoor in the Dummer basin, NW Germany and of pine timbers from a contemporaneous Neolithic trackway Pr 32 through the Campemoor. Changes in growth pattern and population dynamics of the pines are discussed in context with the time of construction of the trackway. The findings date to the period around 3000 B.C. Together with palaeobotanical investigations (pollen and macro remains) and the archaeological results (trackway) the dendroecological analysis mirrors environmental changes and the response of people to these changes. In order to test this local development for a possible climate background, ring-width variability and population dynamics of the Campemoor pines and of the overall data set of Lower Saxonian sub-fossil oaks from bogs have been compared. The results of these investigations clearly indicate a common widespread turn from drier to more humid climate conditions as trigger for the transition period, initiating the raised bog growth. It happened in two phases at the beginning of the 3rd millennium, interrupted by a drier period between 2825 and 2770 B.C. Afterwards large areas of former settlement sites within today's Campemoor became inaccessible and were covered by raised bog."],["dc.identifier.doi","10.1007/s00334-006-0084-4"],["dc.identifier.isi","000243004900010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/52618"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0939-6314"],["dc.title","Environmental change, bog history and human impact around 2900 BC in NW Germany-preliminary results from a dendroecological study of a sub-fossil pine woodland at Campemoor, Dummer Basin"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]