Khishigjargal, Mookhor

[["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","24"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Plant Ecology"],["dc.bibliographiccitation.lastpage","38"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Khishigjargal, Mookhor"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Hauck, Markus"],["dc.date.accessioned","2018-08-08T14:13:01Z"],["dc.date.available","2018-08-08T14:13:01Z"],["dc.date.issued","2014"],["dc.description.abstract","AimsThe Mongolian Altai is an old settlement area, which is populated by pastoral nomads since 2000-3000 years. Forests in this region (at ca. 2300 m a.s.l.) are highly fragmented and border on steppe and alpine grasslands, which are used for mobile livestock husbandry. The climate in Central Asia is warming to levels clearly above the global average, which affects the vegetation. Furthermore, the transition from planned to market economy and the decollectivization of livestock 20 years ago has strongly changed land use practices in Mongolia, especially resulting in an increase in recent logging activities. We were interested in the question how climate warming and selective logging influence the annual stem growth and the stand structure.Methods The impact of climate and land use by the pastoral nomads on the annual stem increment of more than 1800 trees of Siberian larch (Larix sibirica) was analyzed. Different groups of trees with divergent growth trends depending on the social position and stand history were identified by non-metric multidimensional scaling and analysis of similarities. Long-term trends in the annual stem increment were analyzed by establishing separate regional growth curves for trees of different age classes.Important FindingsInstrumental climate data substantiate an increase of temperature by 2.1°C since 1940 at constant precipitation. Trees benefit from the increased temperatures. Climate-response analysis revealed that radial stem increment was promoted by the temperature in early summer, but also high precipitation in spring and in the year before tree-ring formation. Forest dynamics is also strongly influenced by anthropogenic activities. In addition to the natural forest dynamics, logging resulted in divergent growth trends within given age classes and habitats (forest interior and forest edge); overall, 22 groups of trees with different characteristics in the annual radial stem increment were identified. A tree-ring series-based reconstruction of logging intensity since 1935 suggests that moderate selective logging occurred throughout the study period. However, selective logging was strongly intensified after 1990 as the result of the breakdown of the Communist regime in Mongolia and the transition from centrally planned to market economy. Because tree stump densities showed that the ratio of felled to live trees was 2:1 in the interior or even 0.9:1 at the edges of the forests and most logging occurred during the past 20 years, it must be concluded that the forests of the Mongolian Altai are presently exploited far beyond the level of sustainability. A close correlation of the ratio of felled to live trees with the density of summer camps of pastoral nomads in the vicinity suggests that trees are primarily felled by the local population."],["dc.identifier.doi","10.1093/jpe/rtt019"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15231"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Response of tree-ring width to climate warming and selective logging in larch forests of the Mongolian Altai"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","141"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Sukhbaatar, Gerelbaatar"],["dc.contributor.author","Nachin, Baatarbileg"],["dc.contributor.author","Purevragchaa, Battulga"],["dc.contributor.author","Ganbaatar, Batsaikhan"],["dc.contributor.author","Mookhor, Khishigjargal"],["dc.contributor.author","Tseveen, Batchuluun"],["dc.contributor.author","Gradel, Alexander"],["dc.date.accessioned","2019-07-09T11:50:05Z"],["dc.date.available","2019-07-09T11:50:05Z"],["dc.date.issued","2019"],["dc.description.abstract","Scots pine (Pinus sylvestris L.) forests are one of the main vegetation types in the Asian forest-steppe zone. However, over-harvesting currently threatens the natural regeneration and sustainability of these forests. In this study, we examine the long-term effects of different logging intensities on soil properties and natural regeneration in a natural Scots pine forest in the West Khentii Mountains (Mongolia), 19 years after selective logging. Our experimental design included five treatments: clear cut (CC), treatments with high (HI), medium (MI), low (LI) intensities, and a reference parcel with no logging impact at all (RE). We described and quantified the harvest events and applied ANOVA and LMM modeling to analyze and explain the long-term impacts of the logging intensities on soil properties and natural regeneration. We found that logging has a significant negative influence on the physical and chemical properties of the soil because it increases soil compaction and reduces soil nutrients. The most critical impacts of logging were on soil bulk density, total porosity, organic matter, and total nitrogen and phosphorus. The LMM modeling showed that organic matter (OgM), total nitrogen (TN), available K (AK) and pH values are especially impacted by logging. Our study revealed that the values for all of these variables show a linear decrease with increasing selective logging intensity and have a level of significance of p < 0.05. Another finding of this study is that selective logging with low and medium intensities can promote natural regeneration of Scots pine to numbers above those of the reference site (RE). High intensity logging and clear-cuts, however, limit the regeneration of Scots pine, reduce overall seedling numbers (p < 0.05), and create conditions that are suitable only for the regeneration of deciduous tree species. This underlines the risk of Scots pine forest degradation, either by replacement by broad-leaf trees or by conversion into non-forest ecosystems."],["dc.identifier.doi","10.3390/f10020141"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15855"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59699"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","1999-4907"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","570"],["dc.title","Which Selective Logging Intensity is Most Suitable for the Maintenance of Soil Properties and the Promotion of Natural Regeneration in Highly Continental Scots Pine Forests?–Results 19 Years after Harvest Operations in Mongolia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1091"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Oecologia"],["dc.bibliographiccitation.lastpage","1102"],["dc.bibliographiccitation.volume","163"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Khishigjargal, Mookhor"],["dc.contributor.author","Leuschner, Hanns Hubert"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-11-07T08:41:01Z"],["dc.date.available","2018-11-07T08:41:01Z"],["dc.date.issued","2010"],["dc.description.abstract","Central and semiarid north-eastern Asia was subject to twentieth century warming far above the global average. Since forests of this region occur at their drought limit, they are particularly vulnerable to climate change. We studied the regional variations of temperature and precipitation trends and their effects on tree growth and forest regeneration in Mongolia. Tree-ring series from more than 2,300 trees of Siberian larch (Larix sibirica) collected in four regions of Mongolia's forest zone were analyzed and related to available weather data. Climate trends underlie a remarkable regional variation leading to contrasting responses of tree growth in taiga forests even within the same mountain system. Within a distance of a few hundred kilometers (140-490 km), areas with recently reduced growth and regeneration of larch alternated with regions where these parameters remained constant or even increased. Reduced productivity could be correlated with increasing summer temperatures and decreasing precipitation; improved growth conditions were found at increasing precipitation, but constant summer temperatures. An effect of increasing winter temperatures on tree-ring width or forest regeneration was not detectable. Since declines of productivity and regeneration are more widespread in the Mongolian taiga than the opposite trend, a net loss of forests is likely to occur in the future, as strong increases in temperature and regionally differing changes in precipitation are predicted for the twenty-first century."],["dc.identifier.doi","10.1007/s00442-010-1689-y"],["dc.identifier.isi","000280083300025"],["dc.identifier.pmid","20571829"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/4995"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19376"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0029-8549"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Diverging climate trends in Mongolian taiga forests influence growth and regeneration of Larix sibirica"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1391"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Plant Ecology"],["dc.bibliographiccitation.lastpage","1403"],["dc.bibliographiccitation.volume","214"],["dc.contributor.author","Khishigjargal, Mookhor"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Lkhagvadorj, Dorjburgedaa"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Hauck, Markus"],["dc.date.accessioned","2018-08-10T14:12:31Z"],["dc.date.available","2018-08-10T14:12:31Z"],["dc.date.issued","2013"],["dc.description.abstract","The past and present regeneration of Siberian larch (Larix sibirica) was studied in the forest-steppe of the Mongolian Altai, an area which has experienced an increase in annual mean temperature by 2.1 °C since 1940 and is subjected to grazing by mixed herds of livestock owned by pastoral nomads. Past regeneration was reconstructed from tree rings and present regeneration was analyzed by surveying seedlings, sapling-sized trees and the occurrence of viable larch seeds in the soil seed bank. Forest regeneration occurred throughout the twentieth and the early twenty-first centuries in the forest interiors, but ceased after the late 1970s at forest edges. The density of sapling-sized larch trees decreased with livestock density linearly in the interior and exponentially at the edge. Most sapling-sized trees had visible damage from livestock browsing, which also manifested in wood-anatomical anomalies. By contrast, the densities of 1- and 2-year old seedlings increased with livestock density at the forest edge, suggesting that seedlings in this habitat benefitted from the reduction in competition intensity due to livestock grazing. This relationship also suggests that larch seedlings, in contrast to sapling-sized trees, were avoided by the livestock, as otherwise removal by the herbivores should have counteracted the promotion due to reduced competition. Near-consistency of the correlations of total livestock and goat densities with sapling and seedling densities suggests that the control of larch regeneration is primarily a function of goat density, which have tripled in the Mongolian livestock during the past 20 years for economic reasons."],["dc.identifier.doi","10.1007/s11258-013-0259-x"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15248"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Contrasting responses of seedling and sapling densities to livestock density in the Mongolian forest-steppe"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","830"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Global Change Biology"],["dc.bibliographiccitation.lastpage","844"],["dc.bibliographiccitation.volume","22"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Klinge, Michael"],["dc.contributor.author","Degener, Jan"],["dc.contributor.author","Khishigjargal, Mookhor"],["dc.contributor.author","Chenlemuge, Tselmeg"],["dc.contributor.author","Bat-Enerel, Banzragch"],["dc.contributor.author","Yeruult, Yolk"],["dc.contributor.author","Saindovdon, Davaadorj"],["dc.contributor.author","Ganbaatar, Kherlenchimeg"],["dc.contributor.author","Tsogtbaatar, Jamsran"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Hauck, Markus"],["dc.date.accessioned","2017-11-28T10:03:29Z"],["dc.date.available","2017-11-28T10:03:29Z"],["dc.date.issued","2016"],["dc.description.abstract","The boreal forest biome represents one of the most important terrestrial carbon stores, which gave reason to intensive research on carbon stock densities. However, such an analysis does not yet exist for the southernmost Eurosiberian boreal forests in Inner Asia. Most of these forests are located in the Mongolian forest-steppe, which is largely dominated by Larix sibirica. We quantified the carbon stock density and total carbon pool of Mongolia's boreal forests and adjacent grasslands and draw conclusions on possible future change. Mean aboveground carbon stock density in the interior of L. sibirica forests was 66 Mg C ha−1, which is in the upper range of values reported from boreal forests and probably due to the comparably long growing season. The density of soil organic carbon (SOC, 108 Mg C ha−1) and total belowground carbon density (149 Mg C ha−1) are at the lower end of the range known from boreal forests, which might be the result of higher soil temperatures and a thinner permafrost layer than in the central and northern boreal forest belt. Land use effects are especially relevant at forest edges, where mean carbon stock density was 188 Mg C ha−1, compared with 215 Mg C ha−1 in the forest interior. Carbon stock density in grasslands was 144 Mg C ha−1. Analysis of satellite imagery of the highly fragmented forest area in the forest-steppe zone showed that Mongolia's total boreal forest area is currently 73 818 km2, and 22% of this area refers to forest edges (defined as the first 30 m from the edge). The total forest carbon pool of Mongolia was estimated at ~ 1.5−1.7 Pg C, a value which is likely to decrease in future with increasing deforestation and fire frequency, and global warming."],["dc.identifier.doi","10.1111/gcb.13127"],["dc.identifier.fs","617128"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/10601"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1365-2486"],["dc.relation.issn","1354-1013"],["dc.title","Carbon pool densities and a first estimate of the total carbon pool in the Mongolian forest-steppe"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","488"],["dc.bibliographiccitation.issue","8-9"],["dc.bibliographiccitation.journal","Flora - Morphology, Distribution, Functional Ecology of Plants"],["dc.bibliographiccitation.lastpage","496"],["dc.bibliographiccitation.volume","208"],["dc.contributor.author","Chenlemuge, Tselmeg"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Dulamsuren, Choimaa"],["dc.contributor.author","Khishigjargal, Mookhor"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Hauck, Markus"],["dc.date.accessioned","2018-08-10T16:15:15Z"],["dc.date.available","2018-08-10T16:15:15Z"],["dc.date.issued","2013"],["dc.description.abstract","Mongolia's Larix sibirica forests at the southern fringe of the Eurosiberian boreal forest belt are exposed not only to very low winter temperatures, but also to frequent summer droughts. It is not completely known how Siberian larch adapts to these stressors. We examined whether (i) these forests differ in their fine root bio- and necromass from more humid boreal forests further in the North and (ii) inter-annual fluctuations in fine root biomass are related to tree vitality. In two exceptionally dry summers, we found only 4–5 g DM m−2 of fine root biomass (in 0–20 cm depth), which is far less than typical conifer fine root biomass figures from boreal forests (c. 200–400 g m−2) and the lowest forest fine root biomass reported worldwide; in a moist summer, fine root biomass was 20 fold higher. In contrast to fine root biomass, both necromass and non-tree root mass were high in all three years. From the large increase of fine root biomass in the moist summer and the generally high root necromass, we conclude that drought-induced fine root dieback was the likely cause of the very small amount of live root mass in the dry summers. Larch fine roots seem to be more drought-sensitive than shoots, since marked needle loss did not occur under the extreme conditions."],["dc.identifier.doi","10.1016/j.flora.2013.08.002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15256"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Extremely low fine root biomass in Larix sibirica forests at the southern drought limit of the boreal forest"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]