Pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the Nagqu area, central Tibet
Vast areas on the Tibetan Plateau are covered by alpine sedge mats consisting of different species of the genus Kobresia. These mats have topsoil horizons rich in rhizogenic organic matter which creates turfs. As the turfs have recently been affected by a complex destruction process, knowledge conce...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.787168 2023-05-15T17:54:53+02:00 Pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the Nagqu area, central Tibet Kaiser, Knut Miehe, Georg Barthelmes, Alexandra Ehrmann, Otto Scharf, Andreas Schult, Manuela Schlütz, Frank Adamczyk, Sonja Frenzel, Burkhard MEDIAN LATITUDE: 31.652692 * MEDIAN LONGITUDE: 92.407305 * SOUTH-BOUND LATITUDE: 31.316220 * WEST-BOUND LONGITUDE: 91.482640 * NORTH-BOUND LATITUDE: 31.862970 * EAST-BOUND LONGITUDE: 93.091690 2008-08-09 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.787168 https://doi.org/10.1594/PANGAEA.787168 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.787168 https://doi.org/10.1594/PANGAEA.787168 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Kaiser, Knut; Miehe, Georg; Barthelmes, Alexandra; Ehrmann, Otto; Scharf, Andreas; Schult, Manuela; Schlütz, Frank; Adamczyk, Sonja; Frenzel, Burkhard (2008): Turf-bearing topsoils on the central Tibetan Plateau, China: Pedology, botany, geochronology. CATENA, 73(3), 300-311, https://doi.org/10.1016/j.catena.2007.12.001 Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.787168 https://doi.org/10.1016/j.catena.2007.12.001 2023-01-20T07:32:39Z Vast areas on the Tibetan Plateau are covered by alpine sedge mats consisting of different species of the genus Kobresia. These mats have topsoil horizons rich in rhizogenic organic matter which creates turfs. As the turfs have recently been affected by a complex destruction process, knowledge concerning their soil properties, age and pedogenesis are needed. In the core area of Kobresia pygmaea mats around Nagqu (central Tibetan Plateau, ca. 4500 m a.s.l.), four profiles were subjected to pedological, paleobotanical and geochronological analyses concentrating on soil properties, phytogenic composition and dating of the turf. The turf of both dry K. pygmaea sites and wet Kobresia schoenoides sites is characterised by an enrichment of living (dominant portion) and dead root biomass. In terms of humus forms, K. pygmaea turfs can be classified as Rhizomulls mainly developed from Cambisols. Wet-site K. schoenoides turfs, however, can be classified as Rhizo-Hydromors developed from Histic Gleysols. At the dry sites studied, the turnover of soil organic matter is controlled by a non-permafrost cold thermal regime. Below-ground remains from sedges are the most frequent macroremains in the turf. Only a few pollen types of vascular plants occur, predominantly originating from sedges and grasses. Large amounts of microscopic charcoal (indeterminate) are present. Macroremains and pollen extracted from the turfs predominantly have negative AMS 14C ages, giving evidence of a modern turf genesis. Bulk-soil datings from the lowermost part of the turfs have a Late Holocene age comprising the last ca. 2000 years. The development of K. pygmaea turfs was most probably caused by an anthropo(zoo)-genetically initiated growth of sedge mats replacing former grass-dominated vegetation ('steppe'). Thus the turfs result from the transformation of pre-existing topsoils comprising a secondary penetration and accumulation of roots. K. schoenoides turfs, however, are characterised by a combined process of peat formation and ... Dataset Peat permafrost PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(91.482640,93.091690,31.862970,31.316220) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
Vast areas on the Tibetan Plateau are covered by alpine sedge mats consisting of different species of the genus Kobresia. These mats have topsoil horizons rich in rhizogenic organic matter which creates turfs. As the turfs have recently been affected by a complex destruction process, knowledge concerning their soil properties, age and pedogenesis are needed. In the core area of Kobresia pygmaea mats around Nagqu (central Tibetan Plateau, ca. 4500 m a.s.l.), four profiles were subjected to pedological, paleobotanical and geochronological analyses concentrating on soil properties, phytogenic composition and dating of the turf. The turf of both dry K. pygmaea sites and wet Kobresia schoenoides sites is characterised by an enrichment of living (dominant portion) and dead root biomass. In terms of humus forms, K. pygmaea turfs can be classified as Rhizomulls mainly developed from Cambisols. Wet-site K. schoenoides turfs, however, can be classified as Rhizo-Hydromors developed from Histic Gleysols. At the dry sites studied, the turnover of soil organic matter is controlled by a non-permafrost cold thermal regime. Below-ground remains from sedges are the most frequent macroremains in the turf. Only a few pollen types of vascular plants occur, predominantly originating from sedges and grasses. Large amounts of microscopic charcoal (indeterminate) are present. Macroremains and pollen extracted from the turfs predominantly have negative AMS 14C ages, giving evidence of a modern turf genesis. Bulk-soil datings from the lowermost part of the turfs have a Late Holocene age comprising the last ca. 2000 years. The development of K. pygmaea turfs was most probably caused by an anthropo(zoo)-genetically initiated growth of sedge mats replacing former grass-dominated vegetation ('steppe'). Thus the turfs result from the transformation of pre-existing topsoils comprising a secondary penetration and accumulation of roots. K. schoenoides turfs, however, are characterised by a combined process of peat formation and ... |
format |
Dataset |
author |
Kaiser, Knut Miehe, Georg Barthelmes, Alexandra Ehrmann, Otto Scharf, Andreas Schult, Manuela Schlütz, Frank Adamczyk, Sonja Frenzel, Burkhard |
spellingShingle |
Kaiser, Knut Miehe, Georg Barthelmes, Alexandra Ehrmann, Otto Scharf, Andreas Schult, Manuela Schlütz, Frank Adamczyk, Sonja Frenzel, Burkhard Pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the Nagqu area, central Tibet |
author_facet |
Kaiser, Knut Miehe, Georg Barthelmes, Alexandra Ehrmann, Otto Scharf, Andreas Schult, Manuela Schlütz, Frank Adamczyk, Sonja Frenzel, Burkhard |
author_sort |
Kaiser, Knut |
title |
Pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the Nagqu area, central Tibet |
title_short |
Pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the Nagqu area, central Tibet |
title_full |
Pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the Nagqu area, central Tibet |
title_fullStr |
Pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the Nagqu area, central Tibet |
title_full_unstemmed |
Pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the Nagqu area, central Tibet |
title_sort |
pedogeomorphology, geochronology and paleobotany of soil profiles obtained in the nagqu area, central tibet |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.787168 https://doi.org/10.1594/PANGAEA.787168 |
op_coverage |
MEDIAN LATITUDE: 31.652692 * MEDIAN LONGITUDE: 92.407305 * SOUTH-BOUND LATITUDE: 31.316220 * WEST-BOUND LONGITUDE: 91.482640 * NORTH-BOUND LATITUDE: 31.862970 * EAST-BOUND LONGITUDE: 93.091690 |
long_lat |
ENVELOPE(91.482640,93.091690,31.862970,31.316220) |
genre |
Peat permafrost |
genre_facet |
Peat permafrost |
op_source |
Supplement to: Kaiser, Knut; Miehe, Georg; Barthelmes, Alexandra; Ehrmann, Otto; Scharf, Andreas; Schult, Manuela; Schlütz, Frank; Adamczyk, Sonja; Frenzel, Burkhard (2008): Turf-bearing topsoils on the central Tibetan Plateau, China: Pedology, botany, geochronology. CATENA, 73(3), 300-311, https://doi.org/10.1016/j.catena.2007.12.001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.787168 https://doi.org/10.1594/PANGAEA.787168 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.787168 https://doi.org/10.1016/j.catena.2007.12.001 |
_version_ |
1766162753021542400 |