CaltechAUTHORS
  A Caltech Library Service

Lead Aerosol Pollution in the High Sierra Overrides Natural Mechanisms Which Exclude Lead from a Food Chain

Hirao, Yoshimitsu and Patterson, Clair C. (1974) Lead Aerosol Pollution in the High Sierra Overrides Natural Mechanisms Which Exclude Lead from a Food Chain. Science, 184 (4140). pp. 989-992. ISSN 0036-8075. https://resolver.caltech.edu/CaltechAUTHORS:20151112-115905538

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20151112-115905538

Abstract

Most of the lead contained in sedge and voles (mountain meadow mice) within one of the most pristine, remote valleys in the United States is not natural but came from smelter fumes and gasoline exhausts. In a food chain, natural mechanisms do not allow lead to accompany the bulk of the nutritive metals as they proceed to higher trophic levels. This exclusion can be expressed quantitatively by a comparison of lead/calcium ratios at successive trophic levels. This ratio decreased by an overall factor of 200 in proceeding from rock, to soil moisture, to sedge, to vole. This factor would have been 1200 if lead aerosols had not collected on sedge leaves and circtumvented the tendency by sedge to exclude lead from the nutritive metals it absorbed from soil moisture.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.184.4140.989 DOIArticle
http://www.sciencemag.org/content/184/4140/989.abstractPublisherArticle
http://www.jstor.org/stable/1738341JSTORArticle
Additional Information:© 1974 American Association for the Advancement of Science. 5 December 1973; revised 20 February 1974. We thank T. Hinkley and D, Settle (California Institute of Technology) for field and laboratory assistance; S. Frie.dlander and J. Huntziker (Caltech) and T. J. Chow (University of California, San Diego) for help on aerosol deposition studies; B. Brattstrom and J. D. Smith (California State University, Fullerton), C. Sharsmith (California State University, San Jose), and J. L. Patton (University of California, Berkeley) for assistance in animal and plant collections and identifications; A. J. Brown (California Department of Water Resources for use of snow survey samplers; and S. Wood (Caltech) and W. D. Nettleton (University of California, Riverside) for assistance and advice in soil analysis. Details of analytical procedures and clean-room techniques can be obtained from C.C.P. This work was supported by National Science Foundation grant GB-31038 (Division of Biology and Medicine, General Ecology) and by Rockefeller Foundation grant RF 72049.
Funders:
Funding AgencyGrant Number
NSFGB-31038
Rockefeller FoundationRF 72049
Issue or Number:4140
Record Number:CaltechAUTHORS:20151112-115905538
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151112-115905538
Official Citation:Lead Aerosol Pollution in the High Sierra Overrides Natural Mechanisms Which Exclude Lead from a Food Chain Yoshimitsu Hirao and Clair C. Patterson Science 31 May 1974: 184 (4140), 989-992. [DOI:10.1126/science.184.4140.989]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62071
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:13 Nov 2015 22:34
Last Modified:03 Oct 2019 09:15

Repository Staff Only: item control page