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Full-Text Articles in Physical Sciences and Mathematics
Developing Two-Dimensional Ammonium Sensors For Use In Marine Sediments, Zoe Kass
Developing Two-Dimensional Ammonium Sensors For Use In Marine Sediments, Zoe Kass
WWU Honors College Senior Projects
Nitrogen spatial distribution and denitrification rates are not currently well understood in marine sediments. Both nitrogen distribution and denitrification rates vary widely. Better understanding these processes and the factors that impact them could have a variety of applications, from providing us with a foundation for determining any potential impacts of anthropogenic nitrogen to restoring eel grass beds. This project focused on the development of a two-dimensional ammonium sensor using diffusive equilibrium thin films. We successfully created and calibrated our sensor before deploying it at Padilla Bay to produce a two-dimensional image of the spatial distribution and concentrations of ammonium in …
Estimating The Denitrification Rate In Hood Canal Using Water Circulation, Spencer Johnson
Estimating The Denitrification Rate In Hood Canal Using Water Circulation, Spencer Johnson
WWU Honors College Senior Projects
Hood Canal is a long, fjordal estuarine inlet. Because of a sill near its mouth, Hood Canal experiences regular low oxygen in its bottom water; recently, dissolved oxygen has been even lower than usual, leading to fish kills and other ecosystem damage. Anthropogenic nutrients, particularly nitrogen, may be the cause, so it is important to quantify the components of the nitrogen cycle, like denitrification. To my knowledge, there is only one estimate of denitrification from Hood Canal in the literature. This study sought to supplement that data with an independent estimate of denitrification using water circulation along with N2 concentrations …