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Environmental changes in Jiaozhou Bay of northern China during the past 90years using metals and biogenic elements in sediments.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, Zhaohui Zhang, Ke Lu, Xinxin |
| Copyright Year | 2017 |
| Abstract | Metals and biogenic elements were analyzed from surface sediments and a 100cm core collected from Jiaozhou Bay in July 2009, to determine how the environment has changed over the past 90years due to increasing anthropogenic influences in this region. High concentrations of biogenic silica (BSi) represented the dominance of diatoms in the bay. Most metals were lower than the marine sediment quality guidelines; however, Hg, Zn, and Mn were at polluted levels. The vertical profiles of biogenic elements and metals in the sediment core suggest that the most significant environmental changes occurred since the 1990s, and three stages could be defined: (1) before 1950, characterized by low concentrations of biogenic elements and metals; (2) between 1950 and 1990, displaying an obvious increase of Hg and a slow increase of biogenic elements; (3) after 1990, reflected by a significant increase of total organic carbon (TOC), total nitrogen (TN), total phosphate (TP), and most metals, but a decrease of BSi. Correlation and principal component analyses indicated that most metals originated from lithogenic sources, industrial and domestic discharges as well as maricultural activities. |
| Starting Page | 301 |
| Ending Page | 312 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.jes.2016.06.002 |
| PubMed reference number | 28372756 |
| Journal | Medline |
| Volume Number | 53 |
| Alternate Webpage(s) | http://www.jesc.ac.cn/jesc_en/ch/reader/create_pdf.aspx?file_no=S100107421630184X&flag=1 |
| Alternate Webpage(s) | https://doi.org/10.1016/j.jes.2016.06.002 |
| Journal | Journal of environmental sciences |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
