@article{gledocs_11858_7384,
author = {Heinicke, Thomas},
title = {Moorbildungen in der Trockensteppenzone des Issyk-Kul Beckens (Kirgisistan) - Teil 1: Boden, Stratigraphie und Hydrologie},
year = {2003},
volume = {33},
pages = {35-58},

abstract = {Abstract: On the example of the mires at the Ala-Bash - Kongur-Olen valley soils, stratigraphy and hydrology of mires within the dry steppe zone of the Issyk-Kul basin (Kyrgyzstan) are described. Because of the extreme climate, all the mires depend on groundwater, discharging diffuse or in springs below alluvial cones of rivers, fed by glacier water. At all, five different hydrogenetic mire types were realized. The peat and mud substrates are mostly mineral rich, so ‘Halbtorf ’ and minerogene muds are dominating. The peat consists mainly of radicelles, to some extent of brownmosses. At lake Aidin-Kul, Typha-peat was found. Depending on lime content, the mire substrates are subneutral to alkaline. Only in deeper peat layers also acid substrates were found, probably a result of secondary acidification with sulfates. According to the measured C/N ratios, the peat and mud soils correlate with mesotrophic to eutrophic conditions. As a result, three ecological mire types were separated (mesotrophic-subneutral, mesotrophic-alkaline, eutrophic mires). Combining the hydrogenetic and ecological mire types, ten different „Moor-Naturraumtypen“ within the searched mire complexes can be distinguished. Widely distributed are mesotrophic-subneutral and eutrophic „percolation“-surface flow mires and mesotrophic-lime rich and eutrophic terrestrialisation mires. The mire ecosystems are very dynamic, strongly influenced by the activity of the larger rivers in the area. The courses of the rivers on the alluvial cones are changing on a regularly basis, leading to new areas within the mire complexes covered with morainic material. As a result of stratigraphic investigations, up to four phases of mire development were found. In larger parts of the mire systems the peat soils are subject to strong pedogenic changes through anthropogenic input. Especially the intensive cattle grazing has negative impacts to the soils and leads partially to a degradation of the peat layer.},
note = { \url {http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/7384}},
}