English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

We examined sources of water and daily and seasonal water use patterns in two riparian tree species occupying contrasting niches within riparian zones throughout the wet–dry tropics of northern Australia:  Corymbia bella  Hill and Johnson is found along the top of the levee banks and  Melaleuca argentea  W. Fitzg. is restricted to riversides. Patterns of tree water use (sap flow) and leaf water potential were examined in four trees of each species at three locations along the Daly River in the Northern Territory. Predawn leaf water potential was higher than –0.5 MPa throughout the dry season in both species, but was lower at the end of the dry season than at the beginning of the dry season. Contrary to expectations, predawn leaf water potential was lower in  M. argentea  trees along the river than in  C. bella  trees along the levees. In contrast, midday leaf water potential was lower in the  C. bella  trees than in  M. argentea  trees. There were no seasonal differences in tree water use in either species. Daily water use was lower in  M. argentea  trees than in  C. bella  trees. Whole-tree hydraulic conductance, estimated from the slope of the relationship between leaf water potential and sap flow, did not differ between species. Xylem deuterium concentrations indicated that  M. argentea  trees along the riverbank were principally reliant on river water or shallow groundwater, whereas  C. bella  trees along the levee were reliant solely on soil water reserves. This study demonstrated strong gradients of tree water use within tropical riparian communities, with implications for estimating riparian water use requirements and for the management of groundwater resources.

Comparative water use by the riparian trees Melaleuca argentea and Corymbia bella in the wet–dry tropics of northern Australia