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Publication Type J
Authors Zhao, F. J., H. Y. Liu, Y. Yin, G. Z. Hu and X. C. Wu
Title Vegetation succession prevents dry lake beds from becoming dust sources in the semi-arid steppe region of China
Source Earth Surface Processes and Landforms
Author Keywords dust storms vegetation succession wind erosion soil salt content APRIL 1998 SIZE DISTRIBUTION INNER-MONGOLIA NORTH PACIFIC DEPOSITION EVENTS ASIA VARIABILITY FARMLAND EMISSION
Abstract East Asian dust storms have become increasingly intense over the last two decades, and the arid inland regions of northern China have been recognized as the main dust source areas. Numerous lakes in this region have recently become desiccated, leaving large areas of bare ground prone to becoming potential dust sources. Vegetation cover characteristics and vegetation succession following lake desiccation remain unclear. Here we chose eight inland dry lakes, one outflow lake and one river on the southeast edge of the Inner Mongolian Plateau to investigate vegetation patterns along transects from lake bed to lake shore, and determine the relationships between vegetation patterns and environmental factors. The results show that dry lake bed soils do indeed have high contents of fine particles. Also, soil salt content is the most critical control on vegetation succession on desiccated lake beds, and vegetation is unlikely to colonize areas with soil salt content >= 5%. Soil texture additionally influenced vegetation patterns by affecting soil salt content. The likely vegetation succession on dry like beds is Nitraria tangutorum community > Suaeda corniculata and Suaeda glauca communities > Achnatherum splendens and Elymus sibiricus communities, and finally Carex duriuscula community as the probable climax. When vegetation is at the later stages of succession, for example with Achnatherum splendens communities, Elymus sibiricus communities and Carex duriuscula communities, soil may be protected from wind erosion because of their high vegetation cover and high proportion of perennials. We suggest grazing should be avoided around lake shores, especially in Achnatherum splendens communities, because high vegetation cover and biomass not only protect soil from erosion, but also promote the deposition of fine particles blown from upwind regions. Copyright (C) 2010 John Wiley & Sons, Ltd.
Author Address [Liu, Hongyan] Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China. [Liu, Hongyan] Peking Univ, MOE Lab Earth Surface Proc, Beijing 100871, Peoples R China. Liu, HY (reprint author), Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China. lhy@urban.pku.edu.cn
ISSN 0197-9337
ISBN 0197-9337
29-Character Source Abbreviation Earth Surf. Process. Landf.
Publication Date Jun
Year Published 2011
Volume 36
Issue 7
Beginning Page 864-871
Digital Object Identifier (DOI) 10.1002/esp.2114
Unique Article Identifier WOS:000291355300002
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