Dulamsuren, Choimaa

[["dc.bibliographiccitation.firstpage","563"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Acta Oecologica"],["dc.bibliographiccitation.lastpage","572"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Nyambayar, Suran"],["dc.contributor.author","Osokhjargal, Dalaikhuu"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-11-07T11:24:27Z"],["dc.date.available","2018-11-07T11:24:27Z"],["dc.date.issued","2009"],["dc.description.abstract","The potential of Siberian elm (Ulmus pumila) to regenerate from seeds was experimentally studied on south-facing slopes in the northern Mongolian mountain taiga. These slopes are covered with a vegetation mosaic of different steppe Communities and small, savanna-like, U. pumila open woodlands. The hypothesis is tested that the xeric microclimate and high herbivore densities limit the success of seedling establishment in U. pumila and thereby prevent elm from complete encroachment of the grassland-dominated slopes. Seeds were sown and 2-yr-old seedlings were planted prior to the growing season. The water Supply was manipulated by irrigation, as was the feeding pressure by caterpillars with an insecticide. Large herbivores were excluded by fencing. Seeds germinated throughout the summer, but the emerged seedlings did not survive for more than 2 or 3 weeks. Germination rates increased with increasing soil water content and decreasing soil temperatures. Many seeds were consumed by granivores. Most planted 2-yr-old seedlings survived the two growing seasons covered by the study. However, the seedlings suffered from feeding damage by insects (gypsy moth, grasshoppers) and small mammals, from nitrogen deficiency and, to a lesser degree, from drought. The results suggest that high susceptibility of newly emerged seedlings to environmental stresses is a serious bottle neck for U. pumila that prevents them from the formation of closed forests on northern Mongolia's steppe slopes, whereas the probability for seedling survival after this early stage is high. (C) 2009 Elsevier Masson SAS. All rights reserved."],["dc.identifier.doi","10.1016/j.actao.2009.05.002"],["dc.identifier.isi","000270748300001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56408"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Gauthier-villars/editions Elsevier"],["dc.relation.issn","1146-609X"],["dc.title","Establishment of Ulmus pumila seedlings on steppe slopes of the northern Mongolian mountain taiga"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","18"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Environmental and Experimental Botany"],["dc.bibliographiccitation.lastpage","24"],["dc.bibliographiccitation.volume","66"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Nyambayar, Suran"],["dc.contributor.author","Bader, Martin"],["dc.contributor.author","Osokhjargal, Dalaikhuu"],["dc.contributor.author","Oyungerel, Shagjjav"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-11-07T08:30:59Z"],["dc.date.available","2018-11-07T08:30:59Z"],["dc.date.issued","2009"],["dc.description.abstract","Vegetation, soil conditions, age structure, water relations, light response of the chlorophyll fluorescence yield, and herbivore damage were studied in native savanna-like stands of Siberian elm (Ulmus pumila) on south-facing slopes in the mountain taiga of the western Khentey Mountains in northern Mongolia. These stands limited to the middle and lower parts of the slopes consist of single trees or small groups of trees of up to 5 m height. Parts of the tree crowns are characteristically dead. The stands have a marked shrub layer of, e.g.. small individuals of U. pumila as well as Spiraea aquilegifolia, Padus asiatica, and Ribes diacantha, and a diverse, but patchy ground vegetation. U. pumila is limited to loose, deep, stony soils on the slopes, which preferably occur near rock outcrops, mostly in contact to mountain steppe. Fine-grained, non-skeletal soils are avoided by U. pumila, but inhabited by meadow steppe. The preference for stony soils is attributable to the high water requirements of U. pumila. as rock cracks are known to form a reservoir for rain and dew water. The high demand for water is a partly a consequence of a low VPD sensitivity of the stomata regulation known for U. pumila. High transpiration rates may help U. pumila to avoid elevated leaf temperatures under high solar irradiation on the exposed steppe slopes. Increasing non-photochemical quenching at a PPFD > 2000 mu mol m(-2) s(-1) gives additional evidence of the good adaptation of U. pumila to sunlit environments. Minimum shoot water potentials far above the point of zero turgor throughout the growing season suggest sufficient water supply in summer in years with average rainfall. Literature data indicate that U. pumila can also suffer lethal damage on the rocky slopes during exceptionally dry summers. Insect herbivory was of subordinate significance for the elm trees. Therefore, desiccation is thought to be the main cause of the frequent occurrence of dead crown parts and the early death of the elm trees on the sun-exposed slopes. Mean age of the sample trees was as low as 17 years. At this age, the trees are not fertile, but proliferate vegetatively. The low lifespan of U. pumila on the sun-exposed slopes suggests that these slopes are a suboptimal habitat for this tree species. The dependence on loose, stony soils alone explains the irregular distribution of U. pumila on the sun-exposed slopes and rules out the formation of closed elm forest at these sites. (c) 2009 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.envexpbot.2008.12.020"],["dc.identifier.isi","000265127100003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17020"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0098-8472"],["dc.title","Performance of Siberian elm (Ulmus pumila) on steppe slopes of the northern Mongolian mountain taiga: Drought stress and herbivory in mature trees"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","560"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Ecosystems"],["dc.bibliographiccitation.lastpage","572"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Zimmermann, Jorma"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-07-26T16:18:16Z"],["dc.date.available","2018-07-26T16:18:16Z"],["dc.date.issued","2015"],["dc.description.abstract","Climate warming is predicted to extend the duration and enhance the severity of summer droughts in Central Europe, which may pose a serious risk to forest productivity and forest health. Fagus sylvatica (European beech), the most abundant tree species of Central Europe’s natural forest vegetation and one of the key species in forestry, is thought to be particularly vulnerable to drought. Here, we present a dendrochronological analysis in three mixed temperate broad-leaved forests along a precipitation gradient with the aim of comparing the climatic response of radial growth of F. sylvatica with the performance of four co-existing species (Acer pseudoplatanus, A. platanoides, Quercus petraea, Fraxinus excelsior). We hypothesized that Fagus is the most drought sensitive of the five species, which implies that it could lose its competitive advantage at drier sites in the course of climate warming. In support of this hypothesis, we found that F. sylvatica in all stands exhibited an increase in the number of negative pointer years and a decrease in radial increment in the driest stand since about 1980, in parallel to increasing summer temperatures and drought intensity. Such a response was missing in the other four species and may point to shifts in the competitive hierarchy in these mixed forests under a future warmer climate. We conclude that Central Europe’s forestry sector should consider carefully the risk of failure of beech in regions with relatively low and decreasing summer precipitation."],["dc.identifier.doi","10.1007/s10021-015-9849-x"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15200"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Climate Warming-Related Growth Decline Affects Fagus sylvatica, But Not Other Broad-Leaved Tree Species in Central European Mixed Forests"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["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","780"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","788"],["dc.bibliographiccitation.volume","433"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Klinge, Michael"],["dc.contributor.author","Bat-Enerel, Banzragch"],["dc.contributor.author","Ariunbaatar, Tumurbaatar"],["dc.contributor.author","Tuya, Daramragchaa"],["dc.date.accessioned","2019-07-17T13:23:04Z"],["dc.date.available","2019-07-17T13:23:04Z"],["dc.date.issued","2019"],["dc.description.abstract","The hypothesis was tested that the size and the degree of isolation of Larix sibirica forests in the forest-steppe ecotone of Mongolia affects aboveground and belowground carbon pool densities. The research question was based on the fact that both microclimate and the drought sensitivity of stemwood production were earlier shown to differ with stand size and isolation in this ecotone. Contrary to our hypothesis, we did not find significant differences in the organic carbon stock densities of the tree biomass and the mineral soil. The depth, carbon content and carbon stock density of the organic layer increased with stand size, but was not a major determinant of total ecosystem carbon stock density. Nevertheless, the increasing depth and the increasing humus content of the organic layer with stand size could be significant by improving moisture availability and, thus, promoting forest regeneration. Furthermore, reduced organic layer thickness and humus content and thus water storage capacity could be one out of several causes of the previously observed higher drought vulnerability of stemwood formation in small forest stands of the Mongolian forest-steppe. A mean carbon stock density of 237 Mg C ha⁻¹ for total ecosystem organic carbon stock density matches with earlier estimates for Mongolia's boreal forest corroborating the view that the ecosystem carbon pool density at the southern edge of the boreal forest is lower compared to forests at higher latitudes with even colder climate and deeper and more widespread permafrost."],["dc.identifier.doi","10.1016/j.foreco.2018.10.054"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61718"],["dc.language.iso","en"],["dc.relation.issn","0378-1127"],["dc.title","Effects of forest fragmentation on organic carbon pool densities in the Mongolian forest-steppe"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","207"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Dendrochronologia"],["dc.bibliographiccitation.lastpage","213"],["dc.bibliographiccitation.volume","28"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-11-07T08:47:31Z"],["dc.date.available","2018-11-07T08:47:31Z"],["dc.date.issued","2010"],["dc.description.abstract","Effects of a gypsy moth attack on the productivity of Larix sibirica on tree-ring width were analyzed in a case study of a mountain site in the western Khentey in the northern Mongolian forest-steppe ecotone. A major aim of the study was to assess whether reduced productivity by gypsy moth herbivory could contribute to fluctuations of the forest edge to the steppe in larch-dominated woodlands. In the year of the infestation, larch trees at the forest edge lost 90% of their needles and latewood formation was strongly reduced. However, earlywood formation was widely completed before the gypsy moth attack and, therefore, total tree-ring width was not below the average of the five years prior to infestation. In the two years following the gypsy moth invasion, annual stem increment was strongly reduced. Trees growing 30-100 m inside the forest showed a much weaker response of tree-ring widths to the gypsy moth infestation consistent with significantly higher defoliation at forest edge than in the forest interior. Old trees exhibited a stronger growth decline than middle-aged trees, indicating higher infestation of dominant, exposed trees, which are thought to be better accessible to the wind-dispersed gypsy moth larvae hatching in the early growing season on the steppe. Under the current climate, occasional growth reductions are thought to be of little effect on the performance of L. sibirica, as fast-growing competitors of other tree species, which are not or hardly affected by gypsy moth, are absent. (C) 2010 Istituto Italiano di Dendrocronologia. Published by Elsevier GmbH. All rights reserved."],["dc.identifier.doi","10.1016/j.dendro.2009.05.007"],["dc.identifier.isi","000283756500001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20976"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.relation.issn","1125-7865"],["dc.title","Gypsy moth-induced growth decline of Larix sibirica in a forest-steppe ecotone"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Earth Surface Processes and Landforms"],["dc.contributor.author","Klinge, Michael"],["dc.contributor.author","Schneider, Florian"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Arndt, Kim"],["dc.contributor.author","Bayarsaikhan, Uudus"],["dc.contributor.author","Sauer, Daniela"],["dc.date.accessioned","2021-06-01T09:41:48Z"],["dc.date.available","2021-06-01T09:41:48Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1002/esp.5116"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85043"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1096-9837"],["dc.relation.issn","0197-9337"],["dc.title","Interrelations between relief, vegetation, disturbances, and permafrost in the forest‐steppe of central Mongolia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","431"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Journal of Forestry Research"],["dc.bibliographiccitation.lastpage","437"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Battulga, Purevragchaa"],["dc.contributor.author","Tsogtbaatar, Jamsran"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Hauck, Markus"],["dc.date.accessioned","2018-11-07T09:21:03Z"],["dc.date.available","2018-11-07T09:21:03Z"],["dc.date.issued","2013"],["dc.description.abstract","Biomass functions were established to estimate above-ground biomass of Siberian larch (Larix sibirica) in the Altai Mountains of Mongolia. The functions are based on biomass sampling of trees from 18 different sites, which represent the driest locations within the natural range of L. sibirica. The best performing regression model was found for the equations y = (D (2) H)/(a+bD) for stem biomass, y = aD (b) for branch biomass, and y=aD (b) H (c) for needle biomass, where D is the stem diameter at breast height and H is the tree height. The robustness of the biomass functions is assessed by comparison with equations which had been previously published from a plantation in Iceland. There, y=aD (b) H (c) was found to be the most significant model for stem and total above-ground biomasses. Applying the equations from Iceland for estimating the above-ground biomass of trees from Mongolia resulted in the underestimation of the biomass in large-diameter trees and the overestimation of the biomass in thin trees. The underestimation of thick-stemmed trees is probably attributable to the higher wood density, which has to be expected under the ultracontinental climate of Mongolia compared to the euoceanic climate of Iceland. The overestimation of the biomass in trees with low stem diameter is probably due to the high density of young growth in the not systematically managed forests of the Mongolian Altai Mountains, which inhibits branching, whereas the plantations in Iceland are likely to have been planted in lower densities."],["dc.identifier.doi","10.1007/s11676-013-0375-4"],["dc.identifier.isi","000322191800004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29026"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Northeast Forestry Univ"],["dc.relation.issn","1007-662X"],["dc.title","Equations for estimating the above-ground biomass of Larix sibirica in the forest-steppe of Mongolia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","113"],["dc.bibliographiccitation.journal","Acta Oecologica"],["dc.bibliographiccitation.lastpage","121"],["dc.bibliographiccitation.volume","55"],["dc.contributor.author","Khishigjargal, Mookhor"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Hauck, Markus"],["dc.date.accessioned","2018-08-08T14:29:14Z"],["dc.date.available","2018-08-08T14:29:14Z"],["dc.date.issued","2014"],["dc.description.abstract","Climate response of tree-ring width and intra-annual wood anomalies were studied in stands of Siberian larch (Larix sibirica) on Mt. Bogd Uul in the forest-steppe ecotone of Mongolia. Climate on Mt. Bogd Uul is characterized by an increase of the annual mean temperature by 1.5 K between 1965 and 2007, the lack of a long-term trend for annual precipitation and, with it, an increase in aridity. Tree-ring width increases with increasing June precipitation of the current year (June) and increasing late summer precipitation of the previous year. In >100-year old trees, also a negative correlation of tree-ring width with the July temperature of the year prior to tree-ring formation was found. Decreasing tree-ring width with increasing snowfall in December can be explained with the protection of the frost-sensitive eggs of gypsy moth by snow cover, which is a major herbivore of larch in Mongolia and causes reduction in the annual stem increment. The most significant change in wood anatomy was the decline of wide latewood, which is attributable to the increase of summer days with a mean temperature > 15 °C and drought periods in summer without precipitation. Increasing summer drought is also thought to have caused the repeated occurrence of missing rings since the 1960s, which were not observed in the late 19th and early 20th centuries."],["dc.identifier.doi","10.1016/j.actao.2013.12.003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15232"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.orgunit","Abteilung Palynologie und Klimadynamik"],["dc.relation.orgunit","Abteilung Ökologie & Ökosystemforschung"],["dc.title","Climate effects on inter- and intra-annual larch stemwood anomalies in the Mongolian forest-steppe"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","82"],["dc.bibliographiccitation.journal","Journal of Arid Environments"],["dc.bibliographiccitation.lastpage","89"],["dc.bibliographiccitation.volume","88"],["dc.contributor.author","Lkhagvadorj, Dorjburgedaa"],["dc.contributor.author","Hauck, M."],["dc.contributor.author","Dulamsuren, C. H."],["dc.contributor.author","Tsogtbaatar, Jamsran"],["dc.date.accessioned","2018-11-07T09:30:20Z"],["dc.date.available","2018-11-07T09:30:20Z"],["dc.date.issued","2013"],["dc.description.abstract","The population structure, educational level and the livelihoods of 82 households of pastoral nomads, the organization of livestock husbandry and its impact on the grassland and forest ecosystems of the Dayan high valley (>2000 m a.s.l.) in the Mongolian Altai, western Mongolia, were surveyed using interviews and secondary information from official sources. Changes following the transition from centrally planned (before 1990) to market economy were analyzed. Two thirds of the monthly mean income of ca. 310 USD per nomad household is cash (ca. 55 USD) or non-cash (ca. 165 USD) income from livestock husbandry. Cashmere sale accounts for 70% of the cash income from livestock husbandry, which has led to a strong increase of goat numbers after 1990. Forests are used for livestock grazing, fuel wood collection, logging, and fruit collection. Livestock breeding and the seasonal migration of the nomad households are no longer organized by the government. To avoid transportation costs, two thirds of the families have reduced their seasonal migrations. This trend was favored by rising temperatures and earlier snowmelt during the last few decades, but resulted in a shortage of fodder and intensified forest use. Therefore, the use of grasslands and forests in the Mongolian Altai is no longer considered to be sustainable. (c) 2012 Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","Volkswagen Foundation"],["dc.identifier.doi","10.1016/j.jaridenv.2012.07.019"],["dc.identifier.isi","000313392900012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31283"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Academic Press Ltd- Elsevier Science Ltd"],["dc.relation.issn","0140-1963"],["dc.title","Pastoral nomadism in the forest-steppe of the Mongolian Altai under a changing economy and a warming climate"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]