• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Australasian journal of ecotoxicology: the official journal of the Australasian Society for Ecotoxicology >PESTICIDE RESIDUES IN WATERWAYS OF THE LOWER BURDEKIN REGION: CHALLENGES IN ECOTOXICOLOGICAL INTERPRETATION OF MONITORING DATA
【24h】

PESTICIDE RESIDUES IN WATERWAYS OF THE LOWER BURDEKIN REGION: CHALLENGES IN ECOTOXICOLOGICAL INTERPRETATION OF MONITORING DATA

机译：下伯德金地区水道中的农药残留：生态毒理学解释监测数据的挑战

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Pesticide monitoring was conducted through the 2004/05 to 2007/08 water years to determine the wet and dry season dynamics of pesticide movement within the agriculturally developed floodplain of the lower Burdekin River and downstream marine environments. The Burdekin River is one of Queensland's largest rivers draining into the waters of the Great Barrier Reef, and also forms one of the most expansive and high conservation value deltaic wetland complexes on the east coast of Australia. Our monitoring program detected fifteen herbicides and one insecticide in local waterways draining into these downstream wetlands. Most of the pesticides detected were predominantly associated with the sugarcane industry.. Ametryn, atrazine (including its breakdown products desethylatrazine and desisopropylatrazine), diuron, hexazinone and 2,4-D were the chemicals commonly found at the highest concentrations during low flow conditions. Several waterways exhibited frequent low concentrations of pesticides throughout much of the year under dry season conditions. In contrast, the Barratta Creek complex, the main drainage system for the recently developed Burdekin floodplain, exhibited relatively elevated pesticide concentrations throughout the dry season. Herbicides such as atrazine and diuron were regularly above available Australian and New Zealand ecosystem protection guidelines in Barratta Creek during the dry season, suggesting prolonged exposure of aquatic ecosystems to potentially deleterious herbicide concentrations. Ametryn, atrazine (including breakdown products), diuron, and metolachlor were the chemicals most frequently found at the highest concentrations across the majority of sites monitored during flood events. Sampling of wet season flood plumes from local catchments in 2007 detected concentrations of two herbicides - atrazine and diuron - being transported to offshore marine environments. However, concentrations were below the lowest observable effect concentrations for coral and seagrass species. Assessment of monitoring results within the context of current ecosystem protection guidelines highlights an array of shortcomings that limit the capacity to make meaningful risk assessments associated with pesticide presence in natural environments. Issues such as the lack of basic guideline levels for several commonly detected pesticides, complex and potentially interacting mixtures of contaminants in receiving environments, and minimal knowledge as to the effects of chronic, long-term exposure of relevant biota to low pollutant concentrations makes informed and meaningful data interpretation difficult, if not impossible.
机译：在2004/05至2007/08水年期间进行了农药监测，以确定在布尔德金河下游农业开发的洪泛区和下游海洋环境中农药移动的湿季和干季动态。伯德金河是昆士兰州最大的河流，汇入大堡礁海域，也是澳大利亚东海岸最具扩张性和最高保护价值的三角洲湿地综合体之一。我们的监测计划在排入这些下游湿地的当地水道中检测到15种除草剂和1种杀虫剂。检测到的大多数农药主要与甘蔗业有关。Atricn，at去津（包括其分解产物desethylatrazine和desisopropylatrazine），diuron，hexazinone和2,4-D是在低流量条件下浓度最高的化学物质。在旱季条件下，一年中的大部分时间里，一些水道的农药浓度都很低。相反，最近开发的Burdekin洪泛区的主要排水系统Barratta Creek复合体在整个干旱季节表现出相对较高的农药浓度。在旱季，巴拉特拉河的除草剂（如r去津和敌草隆）通常高于澳大利亚和新西兰的生态系统保护准则，这表明水生生态系统长时间暴露于潜在有害的除草剂浓度。在洪灾期间所监测的大多数站点中，Ametricn，at去津（包括分解产物），diuron和异丙甲草胺是最高浓度的化学物质。对2007年当地流域的雨季洪水羽流进行采样后，检测到两种除草剂（at去津和敌草隆）的浓度被运往海上海洋环境。但是，该浓度低于珊瑚和海草物种的最低可观察到的影响浓度。在当前生态系统保护准则范围内对监测结果的评估突出了一系列缺陷，这些缺陷限制了进行与自然环境中农药存在有关的有意义的风险评估的能力。诸如缺乏几种常用检测到的农药的基本准则水平，接收环境中污染物的复杂且可能相互作用的污染物之类的问题，以及对相关生物群长期长期暴露于低污染物浓度下的影响的了解不足，这些都会使人们了解并有意义的数据解释非常困难，即使不是不可能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号