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Factors regulating variability in water quality and net biogeochemical fluxes in the Patuxent River estuary

机译：调节Patuxent河口水质和净生物地球化学通量变化的因素

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摘要

Net biogeochemical production and transport rates for several variables were computed for the Patuxent River estuary from 1985 to 2003 using a box model. Monthly rate estimates were analyzed for temporal patterns and variability in response to climatic factors and nutrient management. The middle estuary was the most productive estuarine region and was characterized by strong pelagic-benthic coupling. Phytoplankton biomass in this region peaked in spring as fueled by seaward nutrient inputs. Nutrients regenerated from decomposition of this spring bloom were required to support summer productivity.;Improvements of sewage treatment in the watershed resulted in declining point source nutrient loads to the estuary, but water quality did not improve in the mesohaline estuary. Poor water quality in the middle estuary was maintained by persistent non-point nutrient loads, while degrading water quality in the lower estuary correlated with increasing DIN inputs from Chesapeake Bay, high river flow, and declining herbivorous grazing.
机译：使用盒子模型，计算了1985年至2003年Patuxent河口的几个变量的净生物地球化学产量和运移率。针对气候因素和养分管理，分析了月率估算的时间模式和变异性。中间河口是生产力最高的河口地区，其特征是强烈的上-底耦合。该区域的浮游植物生物量在春季受到海向养分输入的刺激而达到峰值。春季开花分解后需要再生养分，以支持夏季生产力。流域污水处理的改进导致河口点源养分含量下降，但中卤河口水质没有改善。持续的非点养分负荷保持了河口中部的水质差，而河口中较低的水质下降与切萨皮克湾的DIN投入增加，河水流量大以及草食性草食减少有关。

著录项

  • 作者

    Testa, Jeremy Mark.;

  • 作者单位

    University of Maryland, College Park.;

  • 授予单位 University of Maryland, College Park.;
  • 学科 Environmental science.;Biological oceanography.;Ecology.
  • 学位 M.S.
  • 年度 2006
  • 页码 181 p.
  • 总页数 181
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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