Nutrient Loading and Transformations in the Columbia River Estuary Determined by High-Resolution In Situ Sensors

@article{Gilbert2013NutrientLA,
  title={Nutrient Loading and Transformations in the Columbia River Estuary Determined by High-Resolution In Situ Sensors},
  author={Melissa Gilbert and Joseph A. Needoba and Corey R. Koch and Andrew Barnard and Ant{\'o}nio M. Baptista},
  journal={Estuaries and Coasts},
  year={2013},
  volume={36},
  pages={708-727}
}
The Columbia River estuary is characterized by relatively large tidal currents and water residence times of a few days or less. These and other environmental conditions tend to suppress water column productivity and favor the export of riverborne nutrients to the coastal ocean. However, hotspots of biological activity may allow for significant nutrient transformation and removal within the estuary, but these processes have previously been difficult to quantify due to the challenges of obtaining… 
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References

SHOWING 1-10 OF 84 REFERENCES
Coastal Upwelling Supplies Oxygen-Depleted Water to the Columbia River Estuary
TLDR
Based on a wind-forced supply mechanism, low DO events are probably common to the Columbia River and other regional estuaries and if conditions on the shelf deteriorate further, as observations and models predict, Pacific Northwest estuarine habitats could experience a decrease in environmental quality.
Nutrient cycling in the sub-tropical Brunswick estuary, Australia
A combination of mixing plots, one-dimensional salt balance modelling, nutrient loading budgets, and benthic flux measurements were used to assess nutrient cycling pathways in the enriched
Biogeochemical gradients in the lower Columbia River
AbstractWater, suspended particulate materials (SPM), and biota were sampled between June 14 and 22, 1992 at forty-five mid-channel sites along a downstream gradient in the lower 350 km of the
Nutrient biogeochemistry in an upwelling-influenced estuary of the Pacific northwest (Tillamook Bay, Oregon, USA)
Tillamook Bay, Oregon, is a drowned river estuary that receives freshwater input from 5 rivers and exchanges ocean water through a single channel. Similar to other western United States estuaries,
Benthic metabolism and nutrient regeneration on the continental shelf of Eastern Massachusetts, USA
Benthic metabolism and nutrient cycling were examined in depositional sediments of Broad Sound, Massachusetts Bay, Stellwagen Basin and Cape Cod Bay between 1990 and 1994 in water 16 to 76 m deep.
Influence of a buoyant river plume on phytoplankton nutrient dynamics: What controls standing stocks and productivity?
[1] The influence of the Columbia River plume on phytoplankton rates and biomass accumulation was examined using multiday deckboard incubations as part of the coastal ocean processes River Influences
The chemical control of soluble phosphorus in the Amazon estuary
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