Hauck, Markus

[["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","136"],["dc.bibliographiccitation.journal","Biological Conservation"],["dc.bibliographiccitation.lastpage","145"],["dc.bibliographiccitation.volume","157"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","de Bruyn, Uwe"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-08-13T17:13:02Z"],["dc.date.available","2018-08-13T17:13:02Z"],["dc.date.issued","2013"],["dc.description.abstract","Comparing data of epiphytic lichen diversity in semi-natural broad-leaved forests in north-western Germany from the 19th to early 20th centuries with recent inventories revealed strong changes, even though forest structure and tree species composition had changed only little. In three study areas, between 55% and 70% of the species became rarer during the 100–150-year long observation period. In the spatially extended study areas Weser-Ems Lowlands and Solling Mountains, 36% or 39% of the species, respectively, could not be rediscovered in the recent survey. Considering that species might have been overlooked during revisitation, the extinction rate was estimated to be 28% in the Weser-Ems Lowlands and 30% in the Solling Mountains based on a estimated probability for recovering the species of 75% in crustose lichens and 90% in foliose and fruticose lichens. The main causes of the species decline are thought to be forest management (especially the reduction of overmature and decaying trees), the reduction of soil moisture and, with it, air humidity due to drainage as well as the deposition of acidifying and fertilizing substances from the atmosphere. Lichens specialized on rain-sheltered bark furrows and cavities of old trees or smooth, shady bark or moist thick-stemmed deadwood in the forest interior have suffered the strongest declines, including the epiphyte flora of Fagus sylvatica, Central Europe’s most abundant native forest tree species. Only few lichens which benefit from nitrogen deposition, global warming or the acidification of bark due to sulphur dioxide pollution have spread."],["dc.identifier.doi","10.1016/j.biocon.2012.06.015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15271"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Dramatic diversity losses in epiphytic lichens in temperate broad-leaved forests during the last 150 years"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","309"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Environmental and Experimental Botany"],["dc.bibliographiccitation.lastpage","313"],["dc.bibliographiccitation.volume","68"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Juergens, Sascha-Rene"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-11-07T08:43:30Z"],["dc.date.available","2018-11-07T08:43:30Z"],["dc.date.issued","2010"],["dc.description.abstract","The depsidone norstictic acid is a widespread secondary metabolite produced by lichen-forming fungi. Like other lichen substances, most of the norstictic acid is deposited as crystals in the apoplast of lichens, whereas only a small proportion is soluble in water. Since recent studies suggested a role of lichen substances in shaping the preferences of lichens for specific pH conditions and metal availabilities in their environment, we studied physico-chemical properties of norstictic acid to test the hypothesis that the dissociation and metal-binding behavior of this substance could explain the ecological characteristics of norstictic acid-producing lichens with respect to pH and metal availability. UV spectroscopy was used to study the dissociation and the pH dependence of the metal-binding behavior of isolated norstictic acid in methanol. Metals applied were selected macro- and micro-nutrients (Ce2+, Fe2+, Fe3+, Mg2+, Mn2+, Zn2+). The first dissociation constant (pK(a1)) of norstictic acid amounts to 4.0. It is higher than that of other lichen substances produced by lichens at strongly acidic sites but equals that of the dibenzofuran usnic acid. In solutions containing norstictic acid and Cu2+, Mn2+ or Zn2+ increasing absorbance was observed at pH > 7.5 indicating increasing affinity of the metal ions for the norstictic acid along with pH. Fe2+ and Mg2+ do not form complexes with norstictic acid. The relative high pK(a1) value of norstictic acid is probably responsible for the lack of norstictic acid-producing lichens on strongly acidic substrata. At pH << 4, norstictic acid is thought to damage lichens by shuttling protons into the cytoplasm. Moderate affinity of norstictic acid to Cu2+, Fe3+, Mn2+ and Zn2+ suggests a potential role at controlling the uptake of these ions at slightly alkaline conditions. (C) 2010 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [Ha 3152/8-1]"],["dc.identifier.doi","10.1016/j.envexpbot.2010.01.003"],["dc.identifier.isi","000276741400010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19979"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0098-8472"],["dc.title","Norstictic acid: Correlations between its physico-chemical characteristics and ecological preferences of lichens producing this depsidone"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["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","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","87"],["dc.bibliographiccitation.journal","The Lichenologist"],["dc.bibliographiccitation.lastpage","88"],["dc.bibliographiccitation.volume","34"],["dc.contributor.author","Schmull, M."],["dc.contributor.author","Brodo, I. M."],["dc.contributor.author","Hauck, M."],["dc.date.accessioned","2018-11-07T10:33:25Z"],["dc.date.available","2018-11-07T10:33:25Z"],["dc.date.issued","2002"],["dc.identifier.doi","10.1006/lich.2002.0369"],["dc.identifier.isi","000174203900012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/44609"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0024-2829"],["dc.title","First record of Bryoria subcana (Nyl. ex Stizenb.) Brodo & D. Hawksw. in eastern North America"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","219"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Chemical Ecology"],["dc.bibliographiccitation.lastpage","223"],["dc.bibliographiccitation.volume","33"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Huneck, Siegfried"],["dc.date.accessioned","2018-11-07T11:06:49Z"],["dc.date.available","2018-11-07T11:06:49Z"],["dc.date.issued","2007"],["dc.description.abstract","Lichen substances are known to function as chelators of cations. We tested the hypothesis that lichen substances can control the uptake of toxic metals by adsorbing metal ions at cation exchange sites on cell walls. If true, this hypothesis would help to provide a mechanistic explanation for results of a recent study showing increased production of physodalic acid by thalli of the lichen Hypogymnia physodes transplanted to sites with heavy metal pollution. We treated cellulose filters known to mimic the cation exchange abilities of lichen thalli with four lichen substances produced by H. physodes (physodic acid, physodalic acid, protocetraric acid, and atranorin). Treated filters were exposed to solutions containing seven cations (Ca2+, Cu2+, Fe2+, Fe3+, Mg2+, Mn2+, and Na+), and changes to the solution concentrations were measured. Physodalic acid was most effective at influencing metal adsorption, as it increased the adsorption of Fe3+, but reduced the adsorption of Cu2+, Mn2+, and Na+, and to a lesser extent, that of Ca2+ and Mg2+. Reduced Na+ adsorption matches with the known tolerance of this species to NaCl. The results may indicate a possible general role of lichen substances in metal homeostasis and pollution tolerance."],["dc.identifier.doi","10.1007/s10886-006-9225-6"],["dc.identifier.isi","000243002100019"],["dc.identifier.pmid","17136464"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/52407"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0098-0331"],["dc.title","Lichen substances affect metal adsorption in Hypogymnia physodes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2653"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Global Change Biology"],["dc.bibliographiccitation.lastpage","2661"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Hauck, Markus"],["dc.date.accessioned","2018-11-07T11:22:41Z"],["dc.date.available","2018-11-07T11:22:41Z"],["dc.date.issued","2009"],["dc.description.abstract","Lichens are thought to be sensitive indicators of global warming, as the spread of several thermophilous epiphytes in north-western Central Europe has been attributed to late 20th century warming. In the present paper, the potential contribution of late 20th century warming to the decline of arctic-alpine and boreal-montane lichen species is analyzed. Relevant ecological groups of lichens include terricolous heathland species, saxicolous species of exposed rock outcrops and boulder fields as well as epiphytes of mountain forests. These three groups of lichens experienced significant declines before the onset of late 20th century warming in the 1970s. These declines can be attributed to the abandonment of traditional land use systems in the case of the heathland lichens, increased recreational use of the exposed summits usually inhabited by cold-tolerant saxicolous lichens, and to high atmospheric SO(2) levels in the mid-20th century, but are probably not directly connected to global warming."],["dc.identifier.doi","10.1111/j.1365-2486.2009.01968.x"],["dc.identifier.isi","000270662000008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56029"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell Publishing, Inc"],["dc.relation.issn","1354-1013"],["dc.title","Global warming and alternative causes of decline in arctic-alpine and boreal-montane lichens in North-Western Central Europe"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","278"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Flora"],["dc.bibliographiccitation.lastpage","288"],["dc.bibliographiccitation.volume","204"],["dc.contributor.author","Hauck, Markus"],["dc.contributor.author","Javkhlan, Samjaa"],["dc.date.accessioned","2018-11-07T08:34:30Z"],["dc.date.available","2018-11-07T08:34:30Z"],["dc.date.issued","2009"],["dc.description.abstract","Epiphytic lichen diversity was studied in a dark taiga forest of Pinus sibirica, Abies sibirica and Picea obovata in the western Khentey Mountains, northern Mongolia. Though most lichen species occurred on all three tree species, lichen diversity was higher on Abies and Picea than on Pinus. On branches, lichen vegetation differed less between tree species than on the trunk. The occurrence of many Parmeliaceae species with a hydrophilic surface and of many species producing the dibenzofuran usnic acid gives evidence of the low deposition of acidic pollutants in the study area. The Mn content of bark, which is known to limit at high values the abundance of epiphytic lichens in coniferous forests of Europe and North America, is apparently not controlling the spatial distribution of epiphytic lichens in the dark taiga of Mongolia. This is attributed to the dry and cold winters in Mongolia, as high Mn is especially leached from the surface of trees under moist conditions at temperatures around the freezing point, when the contact between water droplets and the tree surface is particularly intensive. Such moist and cold weather conditions are frequent in most parts of the northern coniferous forests of Europe and North America, but are rare events in the most continental parts of Asia, i.e. in Mongolia and eastern Siberia. (C) 2008 Elsevier GmbH. All rights reserved."],["dc.identifier.doi","10.1016/j.flora.2008.03.001"],["dc.identifier.isi","000265669600004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17831"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.relation.issn","0367-2530"],["dc.title","Epiphytic lichen diversity and its dependence on bark chemistry in the northern Mongolian dark taiga"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]