The Legacy of Trace Metal Deposition from Historical Anthropogenic River Management: A Regional Driver of Offshore Sedimentary Microbial Diversity
The Legacy of Trace Metal Deposition from Historical Anthropogenic River Management: A Regional Driver of Offshore Sedimentary Microbial Diversity
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历史人类河流管理留下的痕量金属沉积：近海沉积微生物多样性的区域驱动因素。
DOI：
10.1016/j.jhazmat.2020.123164
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发表时间：
2020
影响因子：
13.6
通讯作者：
Yan Chongling
中科院分区：
文献类型：
--
作者：
Hong Hualong;Li Junwei;Wang Qiang;Lu Haoliang;Liu Jingchun;Dong Yun-Wei;Zhang Jie;Li Jian;Williams Mark A;Huang Bangqin;Yan Chongling
现代和历史上的河流管理极大地改变了近海环境。尽管大量研究描述了现代影响，但很少有人评估数百年前留下的遗产。在此，我们发现废弃黄河三角洲表层沉积物中存在微量金属富集，推测与古代河流管理有关。本质上，人为改造导致河流移动，形成了 12.4×103km2 的微量金属含量升高的区域；其特点是清晰的金属沉积梯度。与古河口相关的地理因素对Zn（由距河口距离DTM解释）和Cd（DTM和沉积物盐度）影响最为显着，而沉积物吸收能力则与Cu（粘土、粉砂和铁）、Ni（粘土和铁）和Pb（粉砂和铁）的重新分配有关。微量金属遗产对原核生物多样性的影响比对微真核生物多样性的影响更大，前者最好通过稀有而不是优势科和类的变化来描述，并且可以通过“重叠微生态位”模型来解释。这条古老河流的遗产提供了数百年来人类长期干扰的证据。因为它对相关底栖微生物组的影响为现代底栖生态系统水道管理提供了经验教训。
River management, both modern and historical, have dramatically modified offshore environments. While numerous studies have described the modern impacts, very few have evaluated the legacies remaining from hundreds of years ago. Herein, we show trace metal enrichment in the surface sediment of the abandoned Yellow River Delta, hypothesized to be associated with ancient river management. Essentially, anthropogenic modification caused the river to shift, creating a 12.4×103km2area with elevated trace metals; characterized by clear metal deposition gradients. Geographical factors related to the ancient river mouth had the most significant influences on Zn (explained by distance to the river mouth, DTM) and Cd (DTM and sediment salinity), while the sediment absorptive capacity was associated with the reallocation of Cu (clay, silt, and iron), Ni (clay and iron), and Pb (silt and iron). Trace metal legacies showed stronger influences on prokaryotic diversity than on micro-eukaryotic diversity, with the former best described by changes in rare, rather than dominant families and classes, and explainable by an “overlapping micro-niche” model. The ancient river’s legacies provide evidence of longer-term human disturbance over hundreds of years; as its impacts on associated benthic microbiomes have led to lessons for modern-day waterway management of benthic ecosystems.