Some effects of soil-moisture availability on above-ground production and reproductive allocation in <i>Larrea tridentata</i> (DC) Cov

TitleSome effects of soil-moisture availability on above-ground production and reproductive allocation in Larrea tridentata (DC) Cov
Publication TypeJournal Article
Year of Publication1979
AuthorsCunningham G.L, Syvertsen J.P, Reynolds J.F., Willson J.M
JournalOecologia
Volume40
Pagination113-123
Date Published1979
Call Number00490
Keywordsarticle, articles, journal, journals, Larrea, reproduction, Larrea, soil moisture, Larrea,productivity, plant,Larrea tridentata
AbstractData from the US/IBP Desert Biome validation studies indicate that above-ground production and biomass allocated to reproduction in Larrea tridentata vary from one year to another depending upon the timing and extent soil-moisture availability. In an attempt to verify these observations and determine to what extent water availability can affect total above-ground production and reproductive allocation in this widely distributed warm desert shrub, a series of soil-moisture augmentation experiments were conducted. High levels of soil moisture had a greater effect on reproductive allocation than on total above-ground production. Enhanced soil moisture during the period of active growth increased total above-ground production and reduced the percentage of biomass allocated to reproduction. Enhanced soil moisture during the normal periods of little or no growth did not increase total above-ground production.