| 摘要: |
| 研究了滇池螺蛳(Margarya melanioides)分布和底泥营养成分之间的关系。2013年在滇池87个采样点采集螺蛳和底泥样本, 图示分析所有采样点的活的螺蛳数量, 确定活螺在滇池中的分布位点及分布密度; 选择8个采样点的底泥样本, 进行16项营养元素(有机质、磷、氮、锌、铁、锰、镁、钙、铜、钠、钾、砷、汞、铅、镉、铬)含量测定, 分析这些样本营养元素的差异。根据这8个采样点中有无螺蛳生长, 将8个底泥样本分为两组, 采用完全随机设计两样本比较的t检验, 结果两组样本间仅铜的含量有统计学差异(P<0.05), 这可能是由于滇池螺蛳的生长有效富集了重金属铜元素, 使有螺区域比无螺区域底泥中铜的含量明显减少。这在一定程度上说明了螺蛳生长与底泥的关系, 可为滇池污染防治及螺蛳种群保护提供相关的科学依据。 |
| 关键词: 螺蛳(Margarya melanioides) 分布 底泥 铜 滇池 |
| DOI：10.11759/hykx20150805003 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(31160425, 31101616); 云南省科技厅应用基础研究基金项目(2010ZC108); 云南省教育厅科学研究基金资助项目(2010Y208) |
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| Investigation of Margarya melanioides distribution and sediment nutrient elements in the Dianchi Lake |
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| Abstract: |
| In order to investigate the relationship between Margarya melanioides distribution and sediment nutrient elements in the Dianchi Lake, 87 sampling points were selected where M. melanioides and sediment samples were collected in 2013. Diagram displays the sampling points where living M. melanioides were collected, and displays the location distribution and density of living M. melanioides. 8 sediment samples were selected and 16 nutrient elements (Organic matter, phosphorus, nitrogen, zinc, iron, manganese, magnesium, calcium, copper, sodium, potassium, arsenic, mercury, lead, cadmium, and chromium) were detected by chemical assay. Based on whether living M. melanioides was collected or not, 8 sediment samples were divided into two groups. 16 nutrient elements were analyzed using a completely random design for two samples t test between the two groups, and the results showed that only copper element showed significant difference between two groups (P<0.05). It is probably because of that the growth of M. melanioides effectively absorbed the heavy metal elements, resulting in significant decrease in copper element content in lake sediment. The relationship between M. melanioides' growth and the nutrient component in lake sediment was elucidated, which provides a scientific basis for lake pollution prevention and M. melanioides' population protection. |
| Key words: Margarya melanioides distribution lake sediment copper the Dianchi Lake |
