Abstract:
:A new technique based upon the dilution of C 14 /C 12 ratios in structural carbon of root systems during the course of the growing season was used to evaluate belowground turnover or productivity of two cool desert communities in northern Utah, USA. This technique provides a measure of turnover of the root system of established perennial plant communities avoiding many of the disadvantages of other techniques. Adjacent communities dominated by Atriplex confertifolia and Ceratoides lanata both exhibited belowground productivity values exceeding aboveground production by three-fold. The greater belowground turnover of the Atriplex-dominated community may be a factor contributing to the maintenance of a greater quantity of aboveground biomass and prolonged periods of active photosynthesis during the driest portions of the year when Ceratoides becomes largely photosynthetically inactive.
journal_name
Oecologiajournal_title
Oecologiaauthors
Caldwell MM,Camp LBdoi
10.1007/BF00346275subject
Has Abstractpub_date
1974-06-01 00:00:00pages
123-130issue
2eissn
0029-8549issn
1432-1939pii
10.1007/BF00346275journal_volume
17pub_type
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