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  4. Consumption rates and total mercury concentration of food items and consumers collected at six sites on the Colorado River in the Grand Canyon, USA, 2007-2009

Consumption rates and total mercury concentration of food items and consumers collected at six sites on the Colorado River in the Grand Canyon, USA, 2007-2009

Dates

Publication Date
Start Date
2007-07-01
End Date
2009-06-30

Citation

Walters, D.M., Cross, W.F., Kennedy, T.A., Baxter, C.V., Hall, Jr, R.O. and Rosi, E.J., 2020, Consumption rates and total mercury concentration of food items and consumers collected at six sites on the Colorado River in the Grand Canyon, USA, 2007-2009: U.S. Geological Survey data release, https://doi.org/10.5066/P9NBAHFF.

Summary

Consumption rates and total mercury concentration of food items and consumers collected at six sites on the Colorado River in the Grand Canyon. Sites ranged from 0-367 river kilometers downstream of Lees Ferry (AZ, USA). Samples were analyzed for total Hg using cold vapor atomic fluorescence (CVAF, Tekran Model 2600 CVAF spectrometer) following EPA Method 7474. Consumption rate samples were collected quarterly from July 1, 2007 to June 30, 2009. Food items and consumers were collected June 12-28 2008.

Contacts

Point of Contact :
David Walters
Originator :
David Walters, W F Cross, Theodore Kennedy, Colden V Baxter, Robert O Hall Jr., Emma J Rosi
Metadata Contact :
CERC Data Managers
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Ecosystems
SDC Data Owner :
Columbia Environmental Research Center

Attached Files

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Mercury flux and fate in food webs of the Colorado River in the Grand Canyon, USA-Metadata
Original FGDC Metadata
View 		76.71 KB application/fgdc+xml
Colorado River sampling site locations.csv 191 Bytes text/csv
Consumption rates.csv 35.97 KB text/csv
Mercury fate in blackfly larvae.csv 415 Bytes text/csv
Mercury flux from resources to consumers.csv 30.61 KB text/csv
Resource mean mercury concentrations by site.csv 1.25 KB text/csv
Total mercury analysis of organic matter and organisms.csv 7.33 KB text/csv
Total mercury flux to consumer groups.csv 1.54 KB text/csv

Purpose

These data were collected to quantify mercury fluxes in food webs of the Colorado River in Grand Canyon

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Communities

  • Columbia Environmental Research Center (CERC)
  • USGS Data Release Products

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P9NBAHFF

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