After the Storm: Fate and leaching of particulate nitrogen (PN) in the fluvial network and the influence of watershed sources and moisture conditions


Authors:
Owners: This resource does not have an owner who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource.
Resource type: Composite Resource
Storage: The size of this resource is 99.4 KB
Created: Oct 31, 2021 at 12:36 a.m.
Last updated: Oct 31, 2021 at 12:20 p.m.
DOI: 10.4211/hs.4478fc64e802496d86badefffe809ab4
Citation: See how to cite this resource
Sharing Status: Published
Views: 176
Downloads: 2
+1 Votes: Be the first one to 
 this.
Comments: No comments (yet)

Abstract

Large storms can erode, transport, and deposit substantial amounts of particulate ni-trogen (PN) in the fluvial network. The fate of this input and its consequence for water quality is poorly understood. This study investigated the transformation and leaching of PN using a 56-day incubation experiment with five PN sources: forest floor humus, upland mineral A hori-zon, stream bank, storm deposits, and stream bed. Experiments were subjected to two moisture regimes: continuously moist and dry-wet cycles. Sediment and porewater samples were collected through the incubation and analyzed for N and C species, and quantification of nitrifying and denitrifying genes (amoA, nirS, nirK). C and N rich watershed sources experienced decomposi-tion, mineralization, and nitrification and released large amounts of dissolved N, but the amount of N released varied by PN source and moisture regime. Drying and rewetting stimulated nitri-fication and suppressed denitrification in most PN sources. Storm deposits released large amounts of porewater N regardless of the moisture conditions, indicating that they can readily act as N sources under a variety of conditions. The inputs, processing, and leaching of large storm-driven PN inputs become increasingly important as the frequency and intensity of large storms is predicted to increase with global climate change.

Subject Keywords

Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Fair Hill, MD
Longitude
-75.8344°
Latitude
39.7134°

Content

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
USDA NIFA grant 2015-67020-23585
Stroud Water Research Center Research Endowment

How to Cite

Krieg, C., E. Johnson, J. Kan, E. K. Peck, s. inamdar (2021). After the Storm: Fate and leaching of particulate nitrogen (PN) in the fluvial network and the influence of watershed sources and moisture conditions, HydroShare, https://doi.org/10.4211/hs.4478fc64e802496d86badefffe809ab4

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

Comments

There are currently no comments

New Comment

required