Sodium Dynamics in a Northern Ecosystem*

Analyses of terrestrial sources of sodium and estimates of the sodium requirement of moose (Alces alces) on Isle Royale, Lake Superior, suggest that availability of the element controls the moose population. The terrestrial vegetation is very poor in the element, but, as elsewhere, submerged and flo...

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Bibliographic Details
Main Authors: Botkin, D. B., Jordan, P. A., Dominski, A. S., Lowendorf, H. S., Hutchinson, G. E.
Format: Text
Language:English
Published: 1973
Subjects:
Biological Sciences: Zoology
Alces alces
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC427100
http://www.ncbi.nlm.nih.gov/pubmed/16592111
Description
Summary:Analyses of terrestrial sources of sodium and estimates of the sodium requirement of moose (Alces alces) on Isle Royale, Lake Superior, suggest that availability of the element controls the moose population. The terrestrial vegetation is very poor in the element, but, as elsewhere, submerged and floating leaved water-plants are relatively rich. Consumption of such plants in summer would provide an adequate source, if the animal can store the element. The fairly high sodium contents of freshwater vegetation have been little appreciated. In general, sodium concentration in water-plants, unlike that of potassium, is not correlated with chloride but the latter is ordinarily in excess of the sodium, so that uptake of the latter implies an equivalent supply of NaCl.

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