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Carbon pool densities and a first estimate of the total carbon pool in the Mongolian forest‐steppe 下载免费PDF全文
Choimaa Dulamsuren Michael Klinge Jan Degener Mookhor Khishigjargal Tselmeg Chenlemuge Banzragch Bat‐Enerel Yolk Yeruult Davaadorj Saindovdon Kherlenchimeg Ganbaatar Jamsran Tsogtbaatar Christoph Leuschner Markus Hauck 《Global Change Biology》2016,22(2):830-844
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. 相似文献
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Higher climate warming sensitivity of Siberian larch in small than large forest islands in the fragmented Mongolian forest steppe 下载免费PDF全文
Elmira Khansaritoreh Choimaa Dulamsuren Michael Klinge Tumurbaatar Ariunbaatar Banzragch Bat‐Enerel Ganbaatar Batsaikhan Kherlenchimeg Ganbaatar Davaadorj Saindovdon Yolk Yeruult Jamsran Tsogtbaatar Daramragchaa Tuya Christoph Leuschner Markus Hauck 《Global Change Biology》2017,23(9):3675-3689
Forest fragmentation has been found to affect biodiversity and ecosystem functioning in multiple ways. We asked whether forest size and isolation in fragmented woodlands influences the climate warming sensitivity of tree growth in the southern boreal forest of the Mongolian Larix sibirica forest steppe, a naturally fragmented woodland embedded in grassland, which is highly affected by warming, drought, and increasing anthropogenic forest destruction in recent time. We examined the influence of stand size and stand isolation on the growth performance of larch in forests of four different size classes located in a woodland‐dominated forest‐steppe area and small forest patches in a grassland‐dominated area. We found increasing climate sensitivity and decreasing first‐order autocorrelation of annual stemwood increment with decreasing stand size. Stemwood increment increased with previous year's June and August precipitation in the three smallest forest size classes, but not in the largest forests. In the grassland‐dominated area, the tree growth dependence on summer rainfall was highest. Missing ring frequency has strongly increased since the 1970s in small, but not in large forests. In the grassland‐dominated area, the increase was much greater than in the forest‐dominated landscape. Forest regeneration decreased with decreasing stand size and was scarce or absent in the smallest forests. Our results suggest that the larch trees in small and isolated forest patches are far more susceptible to climate warming than in large continuous forests pointing to a grim future for the forests in this strongly warming region of the boreal forest that is also under high land use pressure. 相似文献
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Johanna Painer Petra Kaczensky Oyunsaikhan Ganbaatar Klaus Huber Chris Walzer 《European Journal of Wildlife Research》2011,57(2):225-232
The Przewalski’s horse (Equus caballus przewalskii) became extinct in the wild during the 1960s. Based on a successful captive breeding program, Przewalski’s horses were reintroduced
to the Great Gobi Part “B” strictly protected area (SPA) in SW Mongolia in the late 1990s. The Asiatic wild ass (Equus hemionus hemionus), Przewalski’s horse, and sometimes domestic horses live sympatricly in the Gobi B SPA. Previously published data demonstrates
that, as a result of their different requirements and utilization of the park’s resources, their home-range size and social
structure differ. Parasitological examinations in the three equid species show how the factors “home range, social structure,
and resource selection” significantly impact parasitic burden. Asiatic wild asses are potentially exposed to a higher risk
of parasite re-infection due to their temporal aggregation in very large groups. This study demonstrates a highly significant
greater parasite load in the Asiatic wild ass for the majority of parasites evaluated (Dictyocaulus arnfieldi, Trichostrongylus axei, Strongyloides westeri, Parascaris equorum) compared to Przewalski’s horses and domestic horses in the same habitat. Domestic horses had higher parasite loads for eggs
of strongylids, eggs of anoplocephalidae, and Eimeria leuckarti. The potential risk of cross infection between sympatric living equids is high, as is the cross infection between ruminants
and equids. Furthermore, this study reports for the first time the occurrence of lungworms in free-ranging Przewalski’s horses.
Whereas, Asiatic wild asses and Przewalski’s horses seem to cope very well with the sometimes high parasite burden, Mongolian
domestic horses manifested typical parasite burden symptoms. 相似文献
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Bernátková Anna Ceacero Francisco Oyunsaikhan Ganbaatar Sukhbaatar Dalaitseren Šimek Jaroslav Komárková Martina 《Acta ethologica》2023,26(2):145-150
acta ethologica - Przewalski’s horses live in stable nonterritorial families (harem) of one or more harem stallions, several mares, and their offspring. The harem stallion typically behaves... 相似文献
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Down‐regulation of genes coding for core RNAi components and disease resistance proteins via corresponding microRNAs might be correlated with successful Soybean mosaic virus infection in soybean 下载免费PDF全文
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