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Differences in the patterns and mechanisms of leaf and ecosystem-scale water use efficiencies on the Qinghai-Tibet Plateau by Xiang Wang; Guo Chen; Mingquan Wu; Xiaozhen Li; Qi Wu; Peng Wang; Hui Zeng; Rui Yang; Xiaolu Tang is a Environmental Science article available to read on EtoBox.

What is Differences in the patterns and mechanisms of leaf and ecosystem-scale water use efficiencies on the Qinghai-Tibet Plateau about?

Water use efficiency (WUE) can be employed to characterize the carbon and water cycle of ecosystems. However, little is known about spatial differences in WUE at the leaf (WUE Leaf ) and ecosystem (WUE Eco ) scales regarding their responses to environmental variables and elevation (ELE). To understand the underlying drivers of this difference, we obtained the WUE Leaf from carbon isotope composition of leaves from previously published reports and our own measurements from the Tibetan Plateau and calculated WUE Eco using remote sensing method. The results suggested that the WUE showed different patterns at different scales. Along the elevation gradients, opposite trends of WUE in leaf and ecosystem scales were observed. In the altitude interval of 2000-6000 m a.s.l., WUE Leaf increased significantly when the altitude was greater than 3500 m, while WUE Eco decreased significantly when the altitude was greater than 4500 m. Specifically, the highest WUE Leaf was observed in grasses (10.91 ± 3.34 mmol/mol) in the northwest, while the highest WUE Eco existed in forests (1.18 ± 0.57 g C/kg H 2 O) in the southeast. The most important parameters for the variations of WUE Leaf and WUE Eco we

Who reads Differences in the patterns and mechanisms of leaf and ecosystem-scale water use efficiencies on the Qinghai-Tibet Plateau?

Author

Xiang Wang; Guo Chen; Mingquan Wu; Xiaozhen Li; Qi Wu; Peng Wang; Hui Zeng; Rui Yang; Xiaolu Tang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)