Pen-Mouratov Stanislav, Shukurov Nosir, Yu Jun, Rakhmonkulova Shakhnoza, Kodirov Obidjon, Barness Gineta, Kersten Michael, Steinberger Yosef
The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002, Ramat-Gan, Israel,
Ecotoxicology. 2014 Jul;23(5):880-97. doi: 10.1007/s10646-014-1227-5. Epub 2014 Mar 28.
The main goal of the present study was to determine the effect of the native vegetation on the successive development of the soil ecosystem at abandoned coal-ash landfills of the Angren coal-fired power plant in Uzbekistan. Two different landfills (one not in use for 3 years, termed newer, and the other not in use for 10 years, termed older) with different degrees of vegetation cover were chosen to assess the time and vegetation effects on soil biota and habitat development. The soil biotic structure, including soil microorganisms and soil free-living nematode communities, was investigated both at open plots and under different native plants at the coal-ash landfill area. The observed soil microorganisms were found to be the most important component of the observed ecosystems. Total abundance, biomass, species, trophic and sexual diversity of soil free-living nematodes, along with fungi and organic-matter content, were found to be correlated with trace metals. The nematode trophic and species abundance and diversity increased from the newer toward the older coal-ash landfills. The sex ratio of the nematode communities was found to be dependent on the environmental conditions of the study area, with the males being the most sensitive nematode group. All applied ecological indices confirmed that open landfill plots distant from plants are the most unfavorable areas for soil biota. In that respect, the native plants Alhagi maurorum Desv. and Tamarix sp. were found to be important environmental components for the natural remediation of a soil ecosystem in the coal-ash landfill area.
本研究的主要目标是确定乌兹别克斯坦安格连燃煤发电厂废弃煤灰填埋场的原生植被对土壤生态系统连续发展的影响。选择了两个植被覆盖程度不同的废弃填埋场（一个停用3年，称为较新的填埋场；另一个停用10年，称为较旧的填埋场），以评估时间和植被对土壤生物群和栖息地发展的影响。在煤灰填埋场区域的开阔地块以及不同原生植物下，对包括土壤微生物和土壤自由生活线虫群落在内的土壤生物结构进行了调查。观察到的土壤微生物是观察到的生态系统中最重要的组成部分。发现土壤自由生活线虫的总丰度、生物量、物种、营养和性别多样性，以及真菌和有机质含量与痕量金属相关。线虫的营养和物种丰度及多样性从较新的煤灰填埋场到较旧的煤灰填埋场呈增加趋势。发现线虫群落的性别比例取决于研究区域的环境条件，其中雄性是最敏感的线虫群体。所有应用的生态指数均证实，远离植物的露天填埋场地块对土壤生物群来说是最不利的区域。在这方面，发现原生植物骆驼刺和柽柳属植物是煤灰填埋场区域土壤生态系统自然修复的重要环境组成部分。
