Hertel, Dietrich

[["dc.bibliographiccitation.firstpage","1083"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Ecosystems"],["dc.bibliographiccitation.lastpage","1100"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Müller-Haubold, Hilmar"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-07-26T15:44:22Z"],["dc.date.available","2018-07-26T15:44:22Z"],["dc.date.issued","2015"],["dc.description.abstract","European beech shows mast fruiting at intervals of 2–20 years with a recent increase in frequency. It is not precisely known which climatic or endogenous factors are the proximate causes of masting. We recorded fruit mass production in 11 beech stands across a climate gradient over 4 years, analyzed the influence of climatic, edaphic, and stand structural parameters on fructification, and quantified carbon (C) and nitrogen (N) allocation to leaf and fruit mass production. The solar radiation total in June and July of the year preceding a mast year (JJ−1) was the parameter most closely related to fruit mass production, whereas no influence was found for drought. Radiation induced flowering and subsequent fruit production in beech apparently through a threshold response when the long-term mean of June-July radiation was exceeded by more than 5%. Full masting was associated with a significantly smaller leaf size and stand leaf area in the mast year and it significantly lowered foliar N content in the mast and post-mast year. We conclude that radiation totals and the N status of the foliage jointly govern the temporal pattern of masting in beech, presumably by controlling the photosynthetic activity in early summer. Anthropogenic increases in N deposition and atmospheric [CO2] thus have the potential to increase masting frequency which can substantially alter forest productivity and forest biogeochemical cycles."],["dc.identifier.doi","10.1007/s10021-015-9885-6"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15198"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Climatic Drivers of Mast Fruiting in European Beech and Resulting C and N Allocation Shifts"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","989"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Ecosystems"],["dc.bibliographiccitation.lastpage","999"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Becker, Joscha N."],["dc.contributor.author","Gütlein, Adrian"],["dc.contributor.author","Sierra Cornejo, Natalia"],["dc.contributor.author","Kiese, Ralf"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Kuzyakov, Yakov"],["dc.date.accessioned","2020-12-10T14:11:07Z"],["dc.date.available","2020-12-10T14:11:07Z"],["dc.date.issued","2016"],["dc.identifier.doi","10.1007/s10021-016-0087-7"],["dc.identifier.eissn","1435-0629"],["dc.identifier.issn","1432-9840"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70969"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Legume and Non-legume Trees Increase Soil Carbon Sequestration in Savanna"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","256"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","268"],["dc.bibliographiccitation.volume","444"],["dc.contributor.author","Kirfel, Kristina"],["dc.contributor.author","Heinze, Stefanie"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2020-12-10T14:24:07Z"],["dc.date.available","2020-12-10T14:24:07Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1016/j.foreco.2019.04.022"],["dc.identifier.issn","0378-1127"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72145"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Effects of bedrock type and soil chemistry on the fine roots of European beech – A study on the belowground plasticity of trees"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1173"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Agroforestry Systems"],["dc.bibliographiccitation.lastpage","1187"],["dc.bibliographiccitation.volume","87"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Moser, Gerald"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Erasmi, Stefan"],["dc.contributor.author","Leitner, Daniela"],["dc.contributor.author","Culmsee, Heike"],["dc.contributor.author","Schuldt, Bernhard"],["dc.contributor.author","Schwendenmann, Luitgard"],["dc.date.accessioned","2018-08-10T14:37:12Z"],["dc.date.accessioned","2020-05-11T13:21:03Z"],["dc.date.available","2018-08-10T14:37:12Z"],["dc.date.available","2020-05-11T13:21:03Z"],["dc.date.issued","2013"],["dc.description.abstract","Tropical forests store a large part of the terrestrial carbon and play a key role in the global carbon (C) cycle. In parts of Southeast Asia, conversion of natural forest to cacao agroforestry systems is an important driver of deforestation, resulting in C losses from biomass and soil to the atmosphere. This case study from Sulawesi, Indonesia, compares natural forest with nearby shaded cacao agroforests for all major above and belowground biomass C pools (n = 6 plots) and net primary production (n = 3 plots). Total biomass (above- and belowground to 250 cm soil depth) in the forest (approx. 150 Mg C ha−1) was more than eight times higher than in the agroforest (19 Mg C ha−1). Total net primary production (NPP, above- and belowground) was larger in the forest than in the agroforest (approx. 29 vs. 20 Mg dry matter (DM) ha−1 year−1), while wood increment was twice as high in the forest (approx. 6 vs. 3 Mg DM ha−1 year−1). The SOC pools to 250 cm depth amounted to 134 and 78 Mg C ha−1 in the forest and agroforest stands, respectively. Replacement of tropical moist forest by cacao agroforest reduces the biomass C pool by approximately 130 Mg C ha−1; another 50 Mg C ha−1 may be released from the soil. Further, the replacement of forest by cacao agroforest also results in a 70–80 % decrease of the annual C sequestration potential due to a significantly smaller stem increment."],["dc.identifier.doi","10.1007/s10457-013-9628-7"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65035"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1572-9680"],["dc.relation.issn","0167-4366"],["dc.title","Conversion of tropical moist forest into cacao agroforest: consequences for carbon pools and annual C sequestration"],["dc.title.subtitle","consequences for carbon pools and annual C sequestration"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","645"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Mycorrhiza"],["dc.bibliographiccitation.lastpage","650"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Valtanen, Kerttu"],["dc.contributor.author","Eissfeller, Verena"],["dc.contributor.author","Beyer, Friderike"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:49:41Z"],["dc.date.available","2017-09-07T11:49:41Z"],["dc.date.issued","2014"],["dc.description.abstract","To determine the exchange of nitrogen and carbon between ectomycorrhiza and host plant, young beech (Fagus sylvatica) trees from natural regeneration in intact soil cores were labelled for one growing season in a greenhouse with 13CO2 and 15NO3 15NH4. The specific enrichments of 15N and 13C were higher in ectomycorrhizas (EMs) than in any other tissue. The enrichments of 13C and 15N were also higher in the fine-root segments directly connected with the EM (mainly second-order roots) than that in bulk fine or coarse roots. A strict, positive correlation was found between the specific 15N enrichment in EM and the attached second-order roots. This finding indicates that strong N accumulators provide more N to their host than low N accumulators. A significant correlation was also found for the specific 13C enrichment in EM and the attached second-order roots. However, the specific enrichments for 15N and 13C in EM were unrelated showing that under long-term conditions, C and N exchange between host and EMs are uncoupled. These findings suggest that EM-mediated N flux to the plant is not the main control on carbon flux to the fungus, probably because EMs provide many different services to their hosts in addition to N provision in their natural assemblages."],["dc.identifier.doi","10.1007/s00572-014-0581-8"],["dc.identifier.gro","3147359"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4965"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0940-6360"],["dc.title","Carbon and nitrogen fluxes between beech and their ectomycorrhizal assemblage"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","536"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Biotropica"],["dc.bibliographiccitation.lastpage","542"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Graefe, Sophie"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-02-26T10:17:25Z"],["dc.date.available","2018-02-26T10:17:25Z"],["dc.date.issued","2008"],["dc.description.abstract","Growth and death of fine roots represent an important carbon sink in forests. Our understanding of the patterns of fine root turnover is limited, in particular in tropical forests, despite its acknowledged importance in the global carbon cycle. We used the minirhizotron technique for studying the changes in fine root longevity and turnover along a 2000‐m‐elevational transect in the tropical mountain forests of South Ecuador. Fine root growth and loss rates were monitored during a 5‐mo period at intervals of four weeks with each 10 minirhizotron tubes in three stands at 1050, 1890, and 3060 m asl. Average root loss rate decreased from 1.07 to 0.72 g/g/yr from 1050 to 1890 m, indicating an increase in mean root longevity with increasing elevation. However average root loss rate increased again toward the uppermost stand at 3060 m (1.30 g/g/yr). Thus, root longevity increased from lower montane to mid‐montane elevation as would be expected from an effect of low temperature on root turnover, but it decreased further upslope despite colder temperatures. We suggest that adverse soil conditions may reduce root longevity at high elevations in South Ecuador, and are thus additional factors besides temperature that control root dynamics in tropical mountain forests."],["dc.identifier.doi","10.1111/j.1744-7429.2008.00419.x"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12582"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Estimating Fine Root Turnover in Tropical Forests along an Elevational Transect using Minirhizotrons"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","43"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","56"],["dc.bibliographiccitation.volume","258"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Schmid, Iris"],["dc.contributor.author","Koch, Oliver"],["dc.contributor.author","Muhs, Annette"],["dc.contributor.author","Hölscher, Dirk"],["dc.date.accessioned","2017-09-07T11:45:39Z"],["dc.date.available","2017-09-07T11:45:39Z"],["dc.date.issued","2004"],["dc.description.abstract","Only very limited information exists on the plasticity in size and structure of fine root systems, and fine root morphology of mature trees as a function of environmental variation. Six northwest German old-growth beech forests (Fagus sylvatica L.) differing in precipitation (520 – 1030 mm year−1) and soil acidity/fertility (acidic infertile to basic fertile) were studied by soil coring for stand totals of fine root biomass (0–40 cm plus organic horizons), vertical and horizontal root distribution patterns, the fine root necromass/biomass ratio, and fine root morphology (root specific surface area, root tip frequency, and degree of mycorrhizal infection). Stand total of fine root biomass, and vertical and horizontal fine root distribution patterns were similar in beech stands on acidic infertile and basic fertile soils. In five of six stands, stand fine root biomass ranged between 320 and 470 g m−2; fine root density showed an exponential decrease with soil depth in all profiles irrespective of soil type. An exceptionally small stand fine root biomass (<150 g m−2) was found in the driest stand with 520 mm year−1 of rainfall. In all stands, fine root morphological parameters changed markedly from the topsoil to the lower profile; differences in fine root morphology among the six stands, however, were remarkably small. Two parameters, the necromass/biomass ratio and fine root tip density (tips per soil volume), however, were both much higher in acidic than basic soils. We conclude that variation in soil acidity and fertility only weakly influences fine root system size and morphology of F. sylvatica, but affects root system structure and, probably, fine root mortality. It is hypothesized that high root tip densities in acidic infertile soils compensate for low nutrient supply rates, and large necromasses are a consequence of adverse soil chemical conditions. Data from a literature survey support the view that rainfall is another major environmental factor that influences the stand fine root biomass of F. sylvatica."],["dc.identifier.doi","10.1023/b:plso.0000016508.20173.80"],["dc.identifier.gro","3149055"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5698"],["dc.language.iso","en"],["dc.notes.intern","Hoelscher Crossref import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0032-079X"],["dc.title","Stand fine root biomass and fine root morphology in old-growth beech forests as a function of precipitation and soil fertility"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","9605"],["dc.bibliographiccitation.issue","24"],["dc.bibliographiccitation.journal","Journal of Biological Chemistry"],["dc.bibliographiccitation.lastpage","9614"],["dc.bibliographiccitation.volume","294"],["dc.contributor.author","Gundlach, Jan"],["dc.contributor.author","Krüger, Larissa"],["dc.contributor.author","Herzberg, Christina"],["dc.contributor.author","Turdiev, Asan"],["dc.contributor.author","Poehlein, Anja"],["dc.contributor.author","Tascón, Igor"],["dc.contributor.author","Weiss, Martin"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Daniel, Rolf"],["dc.contributor.author","Hänelt, Inga"],["dc.contributor.author","Lee, Vincent T."],["dc.contributor.author","Stülke, Jörg"],["dc.date.accessioned","2020-12-10T18:12:59Z"],["dc.date.available","2020-12-10T18:12:59Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1074/jbc.RA119.008774"],["dc.identifier.eissn","1083-351X"],["dc.identifier.issn","0021-9258"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74548"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Sustained sensing in potassium homeostasis: Cyclic di-AMP controls potassium uptake by KimA at the levels of expression and activity"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","329"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Environmental and Experimental Botany"],["dc.bibliographiccitation.lastpage","336"],["dc.bibliographiccitation.volume","71"],["dc.contributor.author","Graefe, Sophie"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Coners, Heinz"],["dc.contributor.author","Hertel, Dietrich"],["dc.date.accessioned","2018-11-07T08:54:55Z"],["dc.date.available","2018-11-07T08:54:55Z"],["dc.date.issued","2011"],["dc.description.abstract","Lowered temperatures may reduce the root water uptake of tropical trees at high elevations through several mechanisms; however, field studies to test their relevance are lacking. We measured sap flux density (J) in small-diameter tree roots across a 2000-m elevation transect in a tropical mountain forest for quantifying the effects of temperature (T(a)), VPD and soil moisture (theta) on root water flow and uptake at different elevations. Recently developed miniature heat balance-sap flow gauges were applied to roots of about 10 mm in diameter in mountain forest stands at 1050, 1890 and 3060m a.s.l. in the Ecuadorian Andes and the measured flow was related to anatomical properties of the root xylem. Between 1050 and 3060 m, mean J decreased to about a third. VPD was the most influential environmental factor controlling J at 1050 and 1890 m, while T(a) was the key determinant at 3060 in. Large vessels were absent in the root xylem of high-elevation trees which resulted in a 10-fold decrease of theoretical hydraulic conductivity (k(h)(theor)) between 1050 and 3060 in. We conclude that both physical limitations (reduced VPD, increased viscosity of water) and biological constraints (large decrease of k(h)(theor)) result in a significantly reduced J and root water uptake of the trees in high-elevation tropical forests. (C) 2011 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","German Science Foundation (DFG) through Research Group [402, B6]"],["dc.identifier.doi","10.1016/j.envexpbot.2011.01.001"],["dc.identifier.isi","000290013500001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22785"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0098-8472"],["dc.title","Root functioning in tropical high-elevation forests: Environmental vs. biological control of root water absorption"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","917"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Plant Biology"],["dc.bibliographiccitation.lastpage","926"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Schmidt-Lebuhn, Alexander N."],["dc.contributor.author","Fuchs, J."],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Hirsch, Heidi"],["dc.contributor.author","Toivonen, Johanna M."],["dc.contributor.author","Kessler, Michael"],["dc.date.accessioned","2018-11-07T08:37:48Z"],["dc.date.available","2018-11-07T08:37:48Z"],["dc.date.issued","2010"],["dc.description.abstract","The Andean tree genus Polylepis (Rosaceae) is notorious for the high morphological plasticity of its species and the difficulty in their circumscription. The evolutionary mechanisms that have driven diversification of the genus are still poorly understood, with factors as diverse as ecological specialisation, reticulate evolution, polyploidisation and apomixis being proposed to contribute. In the present study, chromosome counts, flow cytometry and stomata guard cell size measurements were employed to document for the first time the presence of polyploidy in the genus and to infer ploidy levels for most species. Inferred ploidy levels show a clear progression from diploidy in cloud forest species to polyploidy (tetra- to octoploidy) in the morphologically and ecologically specialised incana group, indicating that polyploidisation may have played a major role in speciation processes and the colonisation of novel habitats during the Andean uplift. At least two species of Polylepis comprise populations with varying degrees of ploidy. More extensive studies are needed to obtain a better understanding of the prevalence and effects of intraspecific polyploidy in the genus."],["dc.identifier.doi","10.1111/j.1438-8677.2009.00297.x"],["dc.identifier.isi","000282817700010"],["dc.identifier.pmid","21040307"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18624"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1435-8603"],["dc.title","An Andean radiation: polyploidy in the tree genus Polylepis (Rosaceae, Sanguisorbeae)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]