...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Phosphorus release from coastal Baltic Sea sediments as estimated from sediment profiles
【24h】

Phosphorus release from coastal Baltic Sea sediments as estimated from sediment profiles

机译：根据沉积物剖面估算，波罗的海沿海沉积物中的磷释放量

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

We used the decline in total phosphorus (P) concentration with depth in sediment profiles from the North-western Baltic Proper coastal zone to calculate the site-specific amount of sediment P eventually to be released to the water column: The potentially mobile P. P fractionation revealed that iron bound P dominated the potentially mobile P at sites with oxic surface sediment layers. Organic P forms were also a major constituent of the potentially mobile P pool. We determined that 1— 7 g P/m~2 were potentially mobile at our sites, and the turnover time of this P pool was considered short, i.e., less than a decade. To determine long-term average P fluxes to and from the surface sediment layer, we first multiplied the constant and relatively low P concentration in deeper sediment layers with the sediment accumulation rate to gain the P burial rate. Then the average total P concentration in settling matter was multiplied with the sediment accumulation rate to estimate the depositional P flux at each site. The difference between the depositional and burial rates represents the long-term average release rate of sediment P and varied between 1.0 and 2.7 g P/m~2 yr among our sites. These rates are at the same order of magnitude as values reported from other areas of the Baltic Sea, and constitute a major source of P to the water column.
机译：我们使用总磷（P）浓度随西北波罗的海适当沿海地区沉积物剖面深度的下降来计算最终要释放到水柱中的特定位置的沉积物P量：潜在的流动P. P分馏显示，铁结合的磷在有氧表面沉积物层的位点主导着潜在的可移动磷。有机磷形式也是潜在的流动磷库的主要组成部分。我们确定在我们的站点上有1-7 g P / m〜2可以移动，并且此P池的周转时间被认为很短，即不到十年。为了确定往返于表层沉积物的长期平均P通量，我们首先将较深沉积物层中恒定且相对较低的P浓度乘以沉积物积累速率，以获得P埋藏率。然后，将沉积物中的平均总P浓度乘以沉积物积累速率，以估算每个位置的沉积P通量。沉积速率和埋藏速率之间的差异代表了沉积物P的长期平均释放速率，在我们的站点之间介于1.0和2.7 g P / m〜2年之间。这些速率与波罗的海其他地区报告的数值处于同一数量级，是水柱中磷的主要来源。

著录项

  • 来源
    《Estuarine Coastal and Shelf Science》 |2011年第1期|p.111-117|共7页
  • 作者

    E. Rydin; J.M. Malmaeus; O.M. Karlsson; P.Jonsson;

  • 作者单位

    Erken laboratory. Department of Ecology and Evolution, Uppsala University, Norr Malma 4200, 761 73 Norrtalje, Sweden;

    lVL Swedish Environmental Research Institute, P.O. Box 210 60, SE-100 31 Stockholm, Sweden;

    Erken laboratory. Department of Ecology and Evolution, Uppsala University, Norr Malma 4200, 761 73 Norrtalje, Sweden,Department of Earth Sciences, Uppsala University, Villavagen 16, SE-752 36 Uppsala, Sweden;

    Department of Applied Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden;

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

    phosphorus; sediment; release; burial; baltic sea;

    机译：磷;沉积物;释放;埋葬;波罗的海;

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