@article {51362, title = {Stemflow, throughfall and channelization of stemflow by roots in three Chihuahuan Desert shrubs}, journal = {Journal of Arid Environments}, volume = {32}, year = {1996}, month = {1996}, pages = {271-287}, abstract = {

Three studies were conducted to examine precipitation{\textendash}vegetation relationships in the multi{\textendash}stemmed shrubs Larrea tridentata, Prosopis glandulosa and Flourensia cernua in a desert ecosystem. We measured stemflow and throughfall as affected by bulk precipitation, canopy architecture and stem-angles. Using fluorescent dye, we traced root channelization of stemflow water. Stepwise regression analysis showed that the best one-variable model for stemflow in L. tridentata was canopy volume, which accounted for 87\% of variation. The best one-variable model for stemflow in P. glandulosa and F. cernua was canopy area, which accounted for 82\% of variation in both species. Stemflow data from winter and summer months were statistically compared to determine the influence of leaves on stemflow generation in P. glandulosa and F. cernua. Stemflow amounts collected during winter months do not differ significantly from those of summer months demonstrating that in these winter deciduous species the absence of leaves during winter months does not affect generation of stemflow. Analysis of variance showed that the percentage of throughfall was different among species suggesting that variations in canopy characteristics could explain, in part, these interspecific throughfall differences. Both stem-angle and stem-length had a significant effect on stemflow generation in F. cernua and L. tridentata, whereas there was only a significant relationship between stem-angle and stemflow in P. glandulosa. Analysis of rhodamine-B dye distribution under shrubs indicated that root channels are preferential pathways for movement of stemflow water into soil, and that this water is potentially the source of soil moisture which allows shrubs to remain physiologically active under drought conditions.

}, keywords = {Chihuahuan Desert, Flourensia cernua, Larrea tridentata, prosopis glandulosa, root channelization, stemflow, throughfall}, doi = {10.1006/jare.1996.0023}, url = {/files/bibliography/500.pdf}, author = {E. Martinez-Meza and Walter G. Whitford} } @mastersthesis {51459, title = {Stemflow, throughfall, and root water channelization by three arid land shrubs in southern New Mexico}, year = {1994}, note = {//NMSU, USDA//NONE, LTER//}, month = {1994}, pages = {81}, school = {New Mexico State University}, type = {M.S. Thesis}, address = {Las Cruces, New Mexico}, abstract = {Three experiments were conducted to examine how precipitation-vegetation ralationships for the shrubs Larrea tridentata, Prosopis glandulosa, and Flourensia cernua affect the interception, redistribution, and storage of water in desert ecosystem. The first experiment was designed to determine the percentage of rainfall partitioned as stemflow and throughfall, and also to evalute the effect of some plant conopy parameters on stemflow and throughfall. The second examined the effect of stem-angles on stemflow. The third assessed the effect of varying canopy areas and volumes as well as root allocation on redistribution of stemflow into the soil profile.... Analysis of rhodamine-B dye distribution under shrubs indicated that root channels are preferential pathways for movement of stemflow water into soil, and that this water is potentially the source of soil moisture which allows shrubs to persist and even prosper under drought conditions.}, keywords = {dissertation, dissertations, Flourensia, stemflow, Flourensia, throughfall, Flourensia,root water channeling, hydrology, root water, Larrea, stemflow, Larrea, throughfall, Larrea,root water channeling, Prosopis, stemflow, Prosopis, throughfall, Prosopis,root water channeling, shrub, stemflow, shrub, throughfall, stemflow, shrub, theses, thesis, throughfall, shrub}, author = {E. Martinez-Meza} }