Jacob, Mascha

[["dc.bibliographiccitation.firstpage","359"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Annals of Botany"],["dc.bibliographiccitation.lastpage","366"],["dc.bibliographiccitation.volume","108"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Otto, Philipp I."],["dc.contributor.author","Dittrich, Sebastian"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Bade, Claudia"],["dc.contributor.author","Doerfler, Inken"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-11-07T08:53:44Z"],["dc.date.available","2018-11-07T08:53:44Z"],["dc.date.issued","2011"],["dc.description.abstract","Backgrounds and Aims Lecanora conizaeoides was until recently western and central Europe's most abundant epiphytic lichen species or at least one of the most common epiphytes. The species is adapted to very acidic conditions at pH values around 3 and high concentrations of SO(2) and its derivatives formed in aqueous solution, and thus spread with increasing SO(2) deposition during the 19th and 20th centuries. With the recent decrease of SO(2) emissions to nearly pre-industrial levels within 20 years, L. conizaeoides declined from most of its former range. If still present, the species is no longer the dominant epiphyte, but is occurring in small densities only. The rapid spread of the L. conizaeoides in Europe from an extremely rare species to the probably most frequent epiphytic lichen and the subsequent rapid dieback are unprecedented by any other organism. The present study aimed at identifying the magnitude of deacidification needed to cause the dieback of the lichen. Methods The epiphytic lichen diversity and bark chemistry of montane spruce forests in the Harz Mountains, northern Germany, were studied and the results were compared with data recorded with the same methods 13-15 years ago. Key Results Lecanora conizaeoides, which was the dominant epiphyte of the study area until 15 years ago, is still found on most trees, but only with small cover values of <= 1%. The bark pH increased by only 0.4 pH units. Conclusions The data suggest that only slight deacidification of the substratum causes the breakdown of the L. conizaeoides populations. Neither competitors nor parasites of L. conizaeoides that may have profited from reduced SO(2) concentrations are likely causes of the rapid dieback of the species."],["dc.description.sponsorship","Stemmler Foundation"],["dc.identifier.doi","10.1093/aob/mcr136"],["dc.identifier.isi","000293300500012"],["dc.identifier.pmid","21788378"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22492"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.relation.issn","0305-7364"],["dc.title","Small increase in sub-stratum pH causes the dieback of one of Europe's most common lichens, Lecanora conizaeoides"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","75"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Forstarchiv"],["dc.bibliographiccitation.lastpage","80"],["dc.bibliographiccitation.volume","84"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Dittrich, Sebastian"],["dc.contributor.author","Bade, Claudia"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2017-09-07T11:50:52Z"],["dc.date.available","2017-09-07T11:50:52Z"],["dc.date.issued","2013"],["dc.description.abstract","Kurzfassung: Wirtschaftswälder unterscheiden sich grundlegend von Naturwäldern durch die Seltenheit von Bäumen jenseits des Umtriebsalters in der Alters- und Zerfallsphase sowie durch einen radikaleren Bruch der Bestandeskontinuität zwischen den aufeinanderfolgenden Waldgenerationen. Die natürliche Bestandesdynamik infolge altersbedingter Mortalität und externerr Störungen in vom Menschen nicht genutzten Wäldern führt zu einem heterogenen Muster von unterschiedlich großen Teilflächen unterschiedlicher Waldentwicklungsstadien und zur Bildung von Bestandeslücken. In Mitteleuropa sind Waldbestände, die zumindest seit mehreren Jahrhunderten einer natürlichen Bestandesdynamik ausgesetzt sind, äußerst selten. In einer Fallstudie im Harz (Deutschland) hatten wir die Gelegenheit, einen solchen Bestand zu untersuchen (Brockenurwald). Ziel der Untersuchung war die vergleichende Analyse der pflanzlichen Diversität (Bodenvegetation, Epiphyten) sowie ausgewählter Ökosystemeigenschaften (oberirdische Biomasse, ökosystemarer Kohlenstoffvorrat) in fünf altersabhängigen Waldentwicklungsphasen (Verjüngungs-, Aufwuchs-, Optimum-, Alters- und Zerfallsphase). Während sich die Bodenvegetation kaum zwischen den Entwicklungsstadien unterschied, war der Artenreichtum epiphytischer Moose und Flechten auf den stehenden Bäumen in der Alters- und insbesondere der Zerfallsphase signifikant größer als in den jüngeren Entwicklungsstadien, die auch im Wirtschaftswald vorkommen. Der Artenreichtum auf liegendem (aus der vorangegangenen Waldgeneration stammendem) Totholz war am höchsten in der Verjüngungs- und der Aufwuchsphase. Die oberirdische Biomasse und die Kohlenstoffvorräte waren in der Alters- und in der Zerfallsphase größer als in den anderen Waldentwicklungsstadien. Der Kohlenstoffvorrat im Boden war unabhängig vom Waldentwicklungsstadium konstant hoch. Unsere Ergebnisse unterstreichen die große Bedeutung der Alters- und Zerfallsphase und einer natürlichen Bestandesdynamik für die pflanzliche Diversität von Wäldern und für die Fähigkeit, große Vorräte an Kohlenstoff zu speichern."],["dc.identifier.gro","3147850"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5178"],["dc.language.iso","de"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.title","Natürliche Walddynamik und ihr Wert für Biodiversität und Ökosystemfunktionen"],["dc.title.subtitle","Ergebnisse einer Fallstudie aus dem Harz"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2763"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Blood"],["dc.bibliographiccitation.lastpage","2767"],["dc.bibliographiccitation.volume","102"],["dc.contributor.author","Fiedler, Walter"],["dc.contributor.author","Mesters, R."],["dc.contributor.author","Tinnefeld, H."],["dc.contributor.author","Loges, S."],["dc.contributor.author","Staib, Peter"],["dc.contributor.author","Duhrsen, U."],["dc.contributor.author","Flasshove, M."],["dc.contributor.author","Ottmann, Oliver G."],["dc.contributor.author","Jung, W. F."],["dc.contributor.author","Cavalli, F."],["dc.contributor.author","Kuse, R."],["dc.contributor.author","Thomalla, J."],["dc.contributor.author","Serve, Hubert"],["dc.contributor.author","O'Farrell, A. M."],["dc.contributor.author","Jacobs, M."],["dc.contributor.author","Brega, N. M."],["dc.contributor.author","Scigalla, P."],["dc.contributor.author","Hossfeld, D. K."],["dc.contributor.author","Berdel, Wolfgang E."],["dc.date.accessioned","2018-11-07T10:35:28Z"],["dc.date.available","2018-11-07T10:35:28Z"],["dc.date.issued","2003"],["dc.description.abstract","Neoangiogenesis has been shown to play an important role in the pathogenesis of acute myeloid leukemia (AML). Autocrine and paracrine secretion of angiogenic and hematopoietic growth factors such as vascular endothelial growth factor (VEGF) and stem cell factor (SCF) in the bone marrow microenvironment may promote proliferation and survival of leukemic blasts. This concept represented the rationale for the initiation of a multicenter phase 2 trial of SU5416, a small molecule inhibitor of phosphorylation of VEGF receptors 1 and 2, c-kit, the SCIF receptor, and fms-like tyrosine kinase-3 (FLT3) in patients with advanced AML. Entered into the study were 43 patients with refractory AML or elderly patients not judged medically fit for intensive induction chemotherapy; 42 patients received at least one dose of study drug. Treatment was generally well tolerated, with nausea, headache, and bone pain the most frequent treatment-related side effects. One patient had a morphologic remission (French-American-British [FAB] criteria of complete response without normalization of blood neutrophil and platelet counts) lasting for 2 months. There were 7 patients who achieved a partial response (reduction of blasts by at least 50% in bone marrow and peripheral blood) lasting 1 to 5 months. Patients with AML blasts expressing high levels of VEGF mRNA by quantitative polymerase chain reaction (PCR) had a significantly higher response rate and reduction of bone marrow microvessel density than patients with low VEGF expression consistent with the antiangiogenic effects of SU5416. (C) 2003 by The American Society of Hematology."],["dc.identifier.doi","10.1182/blood-2002-10-2998"],["dc.identifier.isi","000185877300019"],["dc.identifier.pmid","12843001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45106"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0006-4971"],["dc.title","A phase 2 clinical study of SU5416 in patients with refractory acute myeloid leukemia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","132"],["dc.bibliographiccitation.journal","Environmental Pollution"],["dc.bibliographiccitation.lastpage","141"],["dc.bibliographiccitation.volume","164"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Zimmermann, Jorma"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Bade, Claudia"],["dc.contributor.author","Ahrends, Bernd"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-11-07T09:10:55Z"],["dc.date.available","2018-11-07T09:10:55Z"],["dc.date.issued","2012"],["dc.description.abstract","Tree-ring width of Picea abies was studied along an altitudinal gradient in the Harz Mountains, Germany, in an area heavily affected by SO2-related forest decline in the second half of the 20th century. Spruce trees of exposed high-elevation forests had earlier been shown to have reduced radial growth at high atmospheric SO2 levels. After the recent reduction of the SO2 load due to clean air acts, we tested the hypothesis that stem growth recovered rapidly from the SO2 impact. Our results from two formerly damaged high-elevation spruce stands support this hypothesis suggesting that the former SO2-related spruce decline was primarily due to foliar damage and not to soil acidification, as the deacidification of the (still acidic) soil would cause a slow growth response. Increasing temperatures and deposited N accumulated in the topsoil are likely additional growth-promoting factors of spruce at high elevations after the shortfall of SO2 pollution. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.envpol.2012.01.026"],["dc.identifier.isi","000302971400020"],["dc.identifier.pmid","22361051"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26600"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Sci Ltd"],["dc.relation.eissn","1873-6424"],["dc.relation.issn","0269-7491"],["dc.title","Rapid recovery of stem increment in Norway spruce at reduced SO2 levels in the Harz Mountains, Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","75"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Forstarchiv"],["dc.bibliographiccitation.lastpage","80"],["dc.bibliographiccitation.volume","84"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Dittrich, Sebastian"],["dc.contributor.author","Bade, Claudia"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-08-13T15:49:51Z"],["dc.date.available","2018-08-13T15:49:51Z"],["dc.date.issued","2013"],["dc.description.abstract","Managed forests differ principally from old-growth forests by the scarcity of ageing and decaying trees beyond the rotation age as well as by the more radical disruption of stand continuity between consecutive forest generations. The natural dynamics due to age-dependent mortality and external disturbance in unmanaged stands results in a heterogeneous spatial pattern of differently sized patches of different forest development stages and in the formation of gaps. Forest stands, which follow natural forest dynamics since at least several centuries, are extremely rare in Central Europe. In a case study in the Harz Mountains, Germany, we had the opportunity to study such a forest stand (Bracken old growth forest). The objective of our study was the comparative analysis of plant diversity (ground vegetation, epiphytes) as well as of selected ecosystem properties (aboveground biomass, ecosystem carbon pool) in five age-dependent forest development stages (regeneration, initial, climax, over-mature, and decay stages). While the ground vegetation did hardly differ between the forest development stages, the species richness of epiphytic bryophytes and lichens on standing trees was significantly greater in the over-mature and decaying stages than in the earlier ones, which are also found in managed forests. The species richness on downed deadwood (originating from the preceding forest generation) was highest in the regeneration and initial stages. The aboveground biomass and carbon pools were higher in the over-mature and decaying stages than in the other forest development stages. The pool of soil organic carbon was consistently high across the forest development stages. Our results confirm the great importance of the over-mature and decaying stages for plant diversity and for the capability of forests to store high amounts of carbon."],["dc.identifier.doi","10.4432/0300-4112-84-75"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15265"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.title","Natural dynamics of forests and their importance for biodiversity and ecosystem functions"],["dc.title.subtitle","Results of a case study in the Harz Mountains"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","238"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Flora - Morphology, Distribution, Functional Ecology of Plants"],["dc.bibliographiccitation.lastpage","246"],["dc.bibliographiccitation.volume","208"],["dc.contributor.author","Dittrich, Sebastian"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Schweigatz, Daniel"],["dc.contributor.author","Dörfler, Inken"],["dc.contributor.author","Hühne, Robert"],["dc.contributor.author","Bade, Claudia"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-08-13T16:06:12Z"],["dc.date.available","2018-08-13T16:06:12Z"],["dc.date.issued","2013"],["dc.description.abstract","Forest continuity has been identified as an important factor influencing the structure and diversity of forest vegetation. Primary forests with centuries of continuity are usually more diverse than young secondary forests as forest are colonized only slowly and because the former are richer in old tree individuals. In the present study, performed in unmanaged high-elevation spruce forests of the Harz Mountains, Germany, we had the unique opportunity to separate the effects of forest continuity and tree age on plant diversity. We compared an old-growth spruce forest with century-long habitat continuity with an adjacent secondary spruce forest, which had naturally established on a former bog after 1796 when peat exploitation halted. Comparative analysis of the ground and epiphyte vegetation showed that the plant diversity of the old-growth forest was not higher than that of the secondary forest with a similar tree age of >200 years. Our results suggest that a period of >200 years was sufficient for the secondary forest to be colonized by the whole regional species pool of herbaceous and cryptogam forest plants and epiphytes. Therefore, it is likely that habitat structure, including the presence of old and decaying trees, was more important for determining plant diversity than the independent effect of forest continuity. Our results are probably not transferrable to spruce forests younger than 200 years and highly fragmented woodlands with long distances between new stands and old-growth forests that serve as diaspore sources. In addition, our results might be not transferable to remote areas without notable air pollution, as the epiphyte vegetation of the study area was influenced by SO2 pollution in the second half of the 20th century."],["dc.identifier.doi","10.1016/j.flora.2013.03.006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15266"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1618-0585"],["dc.relation.issn","0367-2530"],["dc.title","Separating forest continuity from tree age effects on plant diversity in the ground and epiphyte vegetation of a Central European mountain spruce forest"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","58"],["dc.bibliographiccitation.journal","Environmental and Experimental Botany"],["dc.bibliographiccitation.lastpage","63"],["dc.bibliographiccitation.volume","85"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Böning, Janina"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Dittrich, Sebastian"],["dc.contributor.author","Feussner, Ivo"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-08-13T17:08:21Z"],["dc.date.available","2018-08-13T17:08:21Z"],["dc.date.issued","2013"],["dc.description.abstract","Lichen substances (i.e. lichen-specific carbon-based secondary compounds) are known to be involved in the uptake and immobilization of metal ions, though the biochemical mechanisms of this interaction are largely unexplained. Previous research on potential effects of lichen substances on heavy metal uptake and tolerance mostly focused on lichens in heavily polluted areas with exceptionally high metal concentrations. In the present study, we aimed at gathering information as to whether lichen substances might be involved in the fine-tuning of metal uptake even at not or low-polluted sites. Therefore, we studied lichen substance concentrations in the epiphytic lichen Hypogymnia physodes and metal concentrations in its substratum in a montane spruce forest of Germany. H. physodes produces two depsides and five depsidones, which had been shown to be involved in metal homeostasis, namely in Cu and Mn uptake, in previous laboratory experiments. The amount of lichen substances increased with increasing heavy metal concentration in the substratum, though the latter varied only in the range of a few μmol g−1 between the sample trees. Variability of lichen substance concentrations in H. physodes within the individual trees was low. Among the different lichen substances of H. physodes, the amount of the depsidone physodalic acid relative to the total of lichen substances was most closely correlated to the concentrations of Cu and Mn in the substratum, whereas the amount of the depsidone 3-hydroxyphysodic acid decreased both with increasing concentrations of these two metals and physodalic acid. Thus, our data suggest that lichen substances contribute to metal homeostasis not only in heavy metal-rich habitats, but also at not or low-polluted sites where the lichen substances apparently help to maintain constant intracellular metal concentrations despite of spatially varying availabilities of metal ions."],["dc.identifier.doi","10.1016/j.envexpbot.2012.08.011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15270"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0098-8472"],["dc.title","Lichen substance concentrations in the lichen Hypogymnia physodes are correlated with heavy metal concentrations in the substratum"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","S1877782122000170"],["dc.bibliographiccitation.firstpage","102112"],["dc.bibliographiccitation.journal","Cancer Epidemiology"],["dc.bibliographiccitation.volume","77"],["dc.contributor.author","Pretzsch, E."],["dc.contributor.author","Nieß, H."],["dc.contributor.author","Bösch, F."],["dc.contributor.author","Westphalen, C.B."],["dc.contributor.author","Jacob, S."],["dc.contributor.author","Neumann, J."],["dc.contributor.author","Werner, J."],["dc.contributor.author","Heinemann, V."],["dc.contributor.author","Angele, M.K."],["dc.date.accessioned","2022-04-01T10:02:22Z"],["dc.date.available","2022-04-01T10:02:22Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1016/j.canep.2022.102112"],["dc.identifier.pii","S1877782122000170"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/105890"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.issn","1877-7821"],["dc.rights.uri","https://www.elsevier.com/tdm/userlicense/1.0/"],["dc.title","Age and metastasis – How age influences metastatic spread in cancer. Colorectal cancer as a model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1173"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Annals of Forest Science"],["dc.bibliographiccitation.lastpage","1185"],["dc.bibliographiccitation.volume","68"],["dc.contributor.author","Fleck, Stefan"],["dc.contributor.author","Mölder, Inga"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Gebauer, Tobias"],["dc.contributor.author","Jungkunst, Hermann F."],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-10-29T16:42:22Z"],["dc.date.available","2018-10-29T16:42:22Z"],["dc.date.issued","2011"],["dc.description.abstract","Introduction Sight-based field measurements of tree crown projection area and canopy height are common praxis in forest science but difficult to validate. We quantified their measurement errors based on the virtual representation of an 11-species old-growth forest provided by high-resolution terrestrial LIDAR (light detection and ranging) measurements. Objectives Based on the expectations (a) that violations of the triangulation theory are the main error source of height measurements, and (b) that approximations of tree crowns with fixed angles are not flexible enough for irregular crown shapes in natural stands, we investigated the relative accuracies of triangulation measurements of height of crown base (B T) vs. tree height (H T) and of different crown projection methods. B T (±0.52 m) showed lower measurement errors than H T (±2.4 m). Results and conclusions Larger deviations between field-measured and virtually executed crown projections could partly be attributed to structural differences of the crowns that were two-dimensionally quantified as space capture index (SCI). The largest deviations between both methods occurred on suppressed tree crowns and tall Quercus robur trees in the stand. Because of the method-inherent underestimation of crown projections with fixed angular grid, we propose the use of flexible angles by trained operators."],["dc.identifier.doi","10.1007/s13595-011-0067-1"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7186"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16133"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Comparison of conventional eight-point crown projections with LIDAR-based virtual crown projections in a temperate old-growth forest"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","67"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Annals of Forest Science"],["dc.bibliographiccitation.lastpage","76"],["dc.bibliographiccitation.volume","72"],["dc.contributor.author","Bade, Claudia"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Jungkunst, Hermann F."],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Hauck, Markus"],["dc.date.accessioned","2018-08-09T14:59:21Z"],["dc.date.available","2018-08-09T14:59:21Z"],["dc.date.issued","2014"],["dc.description.abstract","• Context Old-growth forests with natural forest development and complex stand structure have become extremely rare in Central Europe. Changes of biogeochemistry and the N cycle across a full forest development cycle are not well understood. • Aims We tested the hypothesis that net N mineralization and the relative importance of nitrification are increasing with proceeding forest development from regeneration to decay stages. • Methods In an unmanaged old-growth spruce forest, we measured net ammonification and nitrification rate in the five forest development stages in 2 years using the intact soil core incubation method. • Results Net N mineralization (and ammonification) rates were higher in the closed stands of the optimum and over-mature stages than in the more open decay and regeneration stages. Only a small proportion of NH4+ was oxidized to NO3− in the studied acidic soils. • Conclusion Lower N mineralization in the more open than the closed patches of this natural forest is unexpected, contrasting with the findings from artificial gaps. Possible reasons are reduced litter supply and lower canopy N interception in gaps in this forest under exposure to high N deposition. Further studies in other old-growth forests are needed to better understand the mechanisms causing long-term change in N cycling with forest development. • Key message Nitrogen mineralization was higher in the optimum and over-mature stages with closed canopy than in the more open decay and regeneration stages of an unmanaged old-growth forest with high atmospheric nitrogen load, in contrast to published experiments with artificial gaps."],["dc.identifier.doi","10.1007/s13595-014-0394-0"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15240"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Nitrogen mineralization peaks under closed canopy during the natural forest development cycle of an old-growth temperate spruce forest"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]