Wind erosion of saline playa sediments and its ecological effects in Ebinur Lake,Xinjiang, China |
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| Authors: | Dongwei Liu Jilili Abuduwaili Jiaqiang Lei Guangyang Wu Dongwei Gui |
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| Institution: | (1) Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, 818 South Beijing Road, Urumqi, 830011, Xinjiang, People’s Republic of China;(2) Graduate Institute of Chinese Academy of Science, Beijing, 100049, China; |
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| Abstract: | In many arid and semiarid areas, dry lake beds (saline playa) represent a tremendous source of unconsolidated salt-rich sediments
that are available for aeolian transport. Severe salt-dust storms caused by the erosion of such landforms have become very
harmful natural phenomena. In this study, sample analysis and field erosion monitoring of Ebinur Lake was conducted to investigate
the salt content, chemical composition, and wind erosion intensity of surface salt-rich sediments. The effects of salt-dust
rising from the playa on the growth and physiological health of plants were also evaluated in this study through a leaf dustfall
test. The results indicate that water-soluble salts assemble densely on the dry lake bed surface. At a depth of 0–2 cm, the
highest salt contents can exceed 40%, with sulfate and chloride being the main anions present and Na+, Ca2+, and Mg2+ being the primary cations. The annual wind erosion rate ranged from 0.48 to 5.6 cm in the northwest portion of the lake and
from 0.24 to 0.96 cm in the southeast portion. Salt-dust storms caused by wind erosion of saline playa sediments seriously
influenced the normal absorption of minerals by plant leaves. Under the influence of salt-dust storms, plant leaves absorb
more Na+, but far less K+. |
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