原文传递
Investigation into the Distribution of Ballast Water Tracers in Coastal Waters
| 题名： | Investigation into the Distribution of Ballast Water Tracers in Coastal Waters |
| 作者： | Murphy, K;Boehme, J;Sparks, D;Smith, G;Mullady, T;Novle, M;Brown, C;Ruiz, G; |
| 关键词： | distribution；racer；invest；trace；water；cers；last；ball；stig；coas |
| 摘要： | The assessment of compliance by ships with mandatory ballast water exchange (BWE) is limited by the difficulty of verifying whether BWE was implemented. Previous research indicates that concentrations in ballast water of barium, phosphorous and manganese and chromophoric dissolved organic matter (CDOM) can be robust tracers of BWE. The current study examined the seasonal and spatial variability of BWE tracers in Pacific rim ports and the adjacent seas, using the north Pacific as a model system to examine whether it would be possible to set universal thresholds for tracer concentrations in ballast water that can consistently and effectively discriminate tanks that have undergone BWE from tanks that have not. Surveys were conducted in eight port systems in North America and Asia and along perpendicular and coastwise transects off the US Pacific coast. CDOM decreased rapidly with increasing distance from land, whereas barium, phosphorous, and manganese exhibited more seasonally and regionally variable trends. CDOM tracers could usually discriminate between port (0.2 nautical miles (nmi) from land) and oceanic samples, but not necessarily between BWE performed in coastal (0.2nmi to 100 nmi from land) versus oceanic (100nmi from land) locations. This result has important implications for verifying BWE performed according to state legislation, which allows BWE as close as 50 nautical miles from land. |
| 总页数： | 72 Pages(s) |
| 报告类型： | 科技报告 |
相关文献
- Regulating Ballast Water Discharges: Current Legislative Issues. CRS Report for Congress.
- Assessing the Relationship Between Propagule Pressure and Invasion Risk in Ballast Water
- Shipping Study: The Role of Shipping in the Introduction of Non-indigenous Aquatic Organisms to the Coastal Waters of the United States (Other than the Great Lakes) and an Analysis of Control Options.
- INVASIVE MARINE PESTS TOWARDS A NATIONAL MANAGEMENT FRAMEWORK
- Baseline Port Surveys for Introduced Marine Molluskan, Crustacean and Polychaete Species in the South Atlantic Bight.
- Conversion of Specific Gravity to Salinity for Ballast Water Regulatory Management.
检索历史
应用推荐
