| 摘要: |
| 通过对胶州湾东北部滨海湿地 5 个采样点生长的碱蓬中 10 种重金属 Cu、Zn、Pb、Cd、As、Cr、Co、Ni、V、Mo 的系统研究, 发现碱蓬对 Cu, Zn 的吸收明显高于其它重金属, 这可能与 Cu 和Zn 是植物生长发育必需的微量元素有关, 碱蓬体内 Cr、Pb、V 和 Ni 的含量也相对较高。碱蓬对 Mo的富集效果最为显著, 对 Cu、Zn、Cd 和 As 也表现出一定的富集作用, 而对其它重金属的富集效果不明显。 碱蓬的根、 茎和叶对重金属的富集系数从大到小依次为: Cd > As > Cu > Zn > Mo > Co > Ni > V > Pb > Cr; Mo > Cd > Zn > Cu > As, Co, Ni > Pb, Cr > V; Mo > Cd > Zn > Cu > As > Ni > Co > Pb, Cr > V, 总体而言, 碱蓬对 Mo和 Zn的迁移效率较高, 大部分被迁移至地上部分, 输送到茎叶的平均相对含量分别占 66.3%和 65.9%, 其次是 Cu、Pb、Cd、Cr、Co 和 Ni, 它们在碱蓬地上和地下部分的比例大致相当, 而碱蓬对 As 和 V 的迁移效率最低, 输送到茎叶的平均相对含量分别只有 33.5%和37.2%。 |
| 关键词: 重金属, 富集, 迁移, 碱蓬, 胶州湾东北部滨海湿地 |
| DOI：10.11693/hyhz201105008008 |
| 分类号: |
| 基金项目:国家海洋公益性项目资助, 201205008 号; 国家自然科学基金委员会创新群体项目资助，41121064 号 |
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| ACCUMULATION AND TRANSPORTATION OF HEAVY METALS BY SUAEDA SALSA IN THE NORTHEASTERN COASTAL WETLAND OF THE JIAOZHOU BAY |
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YUAN Hua-Mao1, LI Xue-Gang1, LI Ning1, XU Si-Si1,2, ZHANG Mo1,2, DUAN Li-Qin1,2, SONG Jin-Ming1
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1.Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences;2.Graduate University of Chinese Academy of Sciences
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| Abstract: |
| Accumulation and transportation of heavy metals by Suaeda salsa were studied in the northeastern coastal wetland of the Jiaozhou Bay. The uptake of Cu and Zn in S. salsa was much higher than other metals due to their essential roles in plant growth and development. For other metals, the concentrations of Cr, Pb, V, and Ni in S. salsa were relatively higher than Cd, As, Mo, and Co. However, accumulation of Mo by Suaeda salsa was the most obvious relative to its content in the soil, and the enrichment factors was higher than 1 in all sampling stations. The orders of enrichment factor of the heavy metals in root, stem and leaf were Cd > As > Cu > Zn > Mo > Co > Ni > V > Pb > Cr, Mo > Cd > Zn > Cu > As, Co, Ni > Pb, Cr > V and Mo > Cd > Zn > Cu > As > Ni > Co > Pb, Cr > V, respectively. Overall, Mo and Zn were transported from underground to aboveground tissues and their concentrations in stem and leaf were 66.3% and 65.9% higher than in the root, respectively. The concentrations of Cu, Pb, Cd, Cr, Co, and Ni in underground and aboveground tissues were similar, while the transportation efficiencies of As and V were lower. Their concentrations in stem and leaf were only 33.5 and 37.2%, respectively. |
| Key words: Heavy metals, Accumulation, Transportation, Suaeda salsa, The northeastern coastal wetland of the Jiaozhou Bay |
