...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Science of the total environment >Biotic interactions in temporal trends (1992-2010) of organochlorine contaminants in the aquatic food web of Lake Laberge, Yukon Territory
【24h】

Biotic interactions in temporal trends (1992-2010) of organochlorine contaminants in the aquatic food web of Lake Laberge, Yukon Territory

机译：育空地区拉伯奇湖水生食物网中有机氯污染物时间趋势（1992-2010）中的生物相互作用

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

Declines in 6 organochlorine (OC) contaminant groups; chlordane (CHL), DDT, HCH, toxaphene (CHB), PCB and chlorinated benzenes (CBz) were measured in biota of a sub-Arctic lake (Lake Laberge. YT) following the closure of a commercial fishery in 1991. This study examined morphological (length, weight, age), biochemical (lipid content, δ~(13)C, δ~(-15)N), population and OC data for 9 fishes and zooplankton between 1993 and 2003 (2010 for lake trout) to investigate causes for the OC declines. Growth dilution was a major factor influencing the decrease of OCs in lake trout, round wbitefish and possibly zooplankjon most notably in the early 2000s. A decline in lipids of most fish species also contributed to OC declines, although no such change was evident for zooplankton. It is suspected that increases in fish populations or climate variations over the 1990s, may have contributed towards a shift in plankton community composition. From 1991 to 1999, CPUE increased for 7 of the fish species and declined for 2 others. Concurrently, the zooplankton community shifted from an abundance of C. scutifer in 1993 to dominance by D. pribilofensis in 2001. Nitrogen and carbon stable isotope data suggested that food web interactions for most fish species have not changed over time. Although concentrations of OCs have declined in many fishes, the "rate" of OC transfer (using slopes of log OC vs. nitrogen isotope ratios) through the food web was greater in 2001 than in 1993. Overall, the declines in OC concentrations in the fish from Lake Laberge occurred concurrently with changes in their growth, lipid. and abundance, suggesting that ecosystem responses to the closure of the fishery were in part responsible for the lower contaminants in these fishes. As a result of this study, the Yukon government rescinded the health advisory for limiting the consumption of fish from Lake Laberge.
机译：6个有机氯（OC）污染物类别下降；在1991年商业性渔业关闭后，在亚北极湖（Labakeerge.YT）的生物区系中测定了氯丹（CHL），滴滴涕，六氯环己烷，毒杀芬（CHB），多氯联苯和氯化苯（CBz）。 1993年至2003年之间9种鱼类和浮游动物的形态（长度，体重，年龄），生化（脂质含量，δ〜（13）C，δ〜（-15）N），种群和OC数据（2010年为鳟鱼）调查OC下降的原因。生长稀释是影响鳟鱼，圆形w鱼和浮游动物中OCs减少的主要因素，在2000年代初期最为明显。尽管没有明显的浮游动物变化，但大多数鱼类的脂质下降也导致了OC下降。据怀疑，1990年代鱼类种群的增加或气候变化可能导致了浮游生物群落组成的转变。从1991年到1999年，CPUE增加了7种，而下降了2种。同时，浮游动物群落从1993年的丰富黄角C转变为D. pribilofensis的优势。氮和碳稳定同位素数据表明，大多数鱼类的食物网相互作用并未随时间变化。尽管许多鱼类中的OCs浓度下降了，但2001年通过食物网的OC转移率（使用对数OC与氮同位素比率的斜率）比1993年更大。拉伯奇湖的鱼类与生长，脂质的变化同时发生。和丰富度，表明生态系统对渔业关闭的反应在一定程度上造成了这些鱼类污染物的减少。这项研究的结果是，育空地区政府取消了关于限制食用拉伯奇湖鱼类消费的卫生建议。

著录项

  • 来源
    《Science of the total environment》 |2013年第15期|80-92|共13页
  • 作者

    MJ. Ryan; C.A. Stern; K.A. Kidd; M.V. Croft; S. Gewurtz; M. Diamond; L. Kinnear; P. Roach;

  • 作者单位

    Fisheries & Oceans Canada, Freshwater Institute, 501 University Crescent, Winnipeg, Manitoba, Canada R3T 2N6,University of Manitoba, Dept. of Soil Science, Winnipeg, Manitoba, Canada R3T2N2;

    Fisheries & Oceans Canada, Freshwater Institute, 501 University Crescent, Winnipeg, Manitoba, Canada R3T 2N6;

    University of New Brunswick, Canadian Rivers Institute & Department of Biology, Saint John, New Brunswick, Canada E2L 4E5;

    Fisheries & Oceans Canada, Freshwater Institute, 501 University Crescent, Winnipeg, Manitoba, Canada R3T 2N6;

    University of Toronto, Department of Geography, Toronto, Ontario, Canada M5S 3C3;

    University of Toronto, Department of Geography, Toronto, Ontario, Canada M5S 3C3;

    Northern Climate Exchange, Yukon Research Center, Yukon College, Whitehorse, Yukon Territory, Canada Y1A 5K4;

    Aboriginal Affairs and Northern Development Canada, Rm 415C- 300 Main St., Whitehorse, Yukon Territory, Canada Y1A 2B5;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    organochlorines; sub-arctic lake; crowth dilution; food web; fish; temporal trends;

    机译：有机氯;亚北极湖人群稀释;食物网;鱼;时间趋势;

相似文献

  • 外文文献
  • 中文文献
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