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Transformation of vegetative cover on the Ustyurt Plateau of Central Asia as a consequence of the Aral Sea shrinkage
Journal of Arid Land ( IF 3 ) Pub Date : 2020-11-27 , DOI: 10.1007/s40333-020-0077-7
Adilov Bekzod , Shomurodov Habibullo , Lianlian Fan , Kaihui Li , Xuexi Ma , Yaoming Li

The gradual shrinkage of the Aral Sea has led to not only the degradation of the unique environments of the Aral Sea, but also numerous and fast developing succession processes in the neighborhood habitats surrounding the sea. In this study, we investigated the vegetative succession processes related to the Aral Sea shrinkage in the Eastern Cliff of the Ustyurt Plateau in Republic of Uzbekistan, Central Asia. We compared the results of our current investigation (2010–2017) on vegetative communities with the geobotany data collected during the 1970s (1970–1980). The results showed great changes in the mesophytic plant communities and habitat aridization as a result of the drop in the underground water level, which decreased atmospheric humidity and increased the salt content of the soil caused by the shrinkage of the Aral Sea. In the vegetative communities, we observed a decrease in the Margalef index (DMg), which had a positive correlation with the poly-dominance index (I-D). The main indications of the plant communities’ transformation were the loss of the weak species, the appearance of new communities with low species diversity, the stabilization of the projective cover of former resistant communities, as well as the appearance of a new competitive species, which occupy new habitats.

中文翻译:

咸海收缩导致中亚 Ustyurt 高原植被变化

咸海的逐渐缩小不仅导致咸海独特的环境退化,而且导致咸海周边栖息地数量众多且快速发展的演替过程。在这项研究中,我们调查了与中亚乌兹别克斯坦共和国乌斯秋尔特高原东崖咸海收缩相关的植物演替过程。我们将当前对植物群落的调查(2010-2017 年)的结果与 1970 年代(1970-1980 年)收集的地质植物学数据进行了比较。结果表明,地下水位下降导致中生植物群落和生境干旱化发生较大变化,咸海收缩导致大气湿度降低,土壤含盐量增加。在植物群落中,我们观察到 Margalef 指数 (DMg) 下降,该指数与多优势指数 (ID) 呈正相关。植物群落转化的主要标志是弱种的丧失、物种多样性低的新群落的出现、原抗性群落投射覆盖的稳定以及新的竞争种的出现。占据新的栖息地。
更新日期:2020-11-27
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