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Article
Recent increases in sediment and nutrient accumulation in Bear Lake, Utah/Idaho, USA.
Faculty Publications
  • Joseph M. Smoak
  • Peter W. Swarzenski
SelectedWorks Author Profiles:

Joseph M. Smoak

Document Type
Article
Publication Date
2004
Date Issued
January 2004
Date Available
January 2012
Abstract

This study examines historical changes in sediment and nutrient accumulation rates in Bear Lake along the northeastern Utah/Idaho border, USA. Two sediment cores were dated by measuring excess 210Pb activities and applying the constant rate of supply (CRS) dating model. Historical rates of bulk sediment accumulation were calculated based on the ages within the sediment cores. Bulk sediment accumulation rates increased throughout the last 100 years. According to the CRS model, bulk sediment accumulation rates were <25 mg cm-2 year-1 prior to 1935. Between 1935 and 1980, bulk sediment accumulation rates increased to approximately 40 mg cm-2 year-1. This increase in sediment accumulation probably resulted from the re-connection of Bear River to Bear Lake. Bulk sediment accumulation rates accelerated again after 1980. Accumulation rates of total phosphorus (TP), total nitrogen (TN), total inorganic carbon (TIC), and total organic carbon (TOC) were calculated by multiplying bulk sediment accumulation rates times the concentrations of these nutrients in the sediment. Accumulation rates of TP, TN, TIC, and TOC increased as a consequence of increased bulk sediment accumulation rates after the re-connection of Bear River with Bear Lake.

Comments
Abstract only. Full-text article is available only through licensed access provided by the publisher. Published in Hydrobiologia, 525, 175-184. Members of the USF System may access the full-text of the article through the authenticated link provided.
Language
en_US
Publisher
Kluwer Academic Publishers
Creative Commons License
Creative Commons Attribution-Noncommercial-No Derivative Works 4.0
Citation Information
Smoak, J.M. & Swarzenski, P.W. (2004). Recent increases in sediment and nutrient accumulation in Bear Lake, Utah/Idaho, USA. Hydrobiologia, 525, 175-184.