Characteristics of ecosystem water use efficiency in a desert riparian forest
Article
Article Title | Characteristics of ecosystem water use efficiency in a desert riparian forest |
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ERA Journal ID | 200438 |
Article Category | Article |
Authors | Ma, Xiaohong (Author), Feng, Qi (Author), Su, Yonghong (Author), Yu, Tengfei (Author) and Deo, Ravinesh C. (Author) |
Journal Title | Environmental Earth Sciences |
Journal Citation | 77 (358) |
Number of Pages | 12 |
Year | 2018 |
Publisher | Springer |
Place of Publication | Austria |
ISSN | 1866-6280 |
1866-6299 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s12665-018-7518-z |
Web Address (URL) | https://link.springer.com/article/10.1007/s12665-018-7518-z |
Abstract | The Ejin oasis, located on the river sides of a hyper-arid region, represents some of the richest desert ecosystems, populated with riparian forest. Water availability is the main limited factors for the distribution and growth of the forest. Currently, the water–carbon process and mechanisms in the desert riparian forest remain uncertain. The study investigated the seasonal and inter-annual variations in the gross primary productivity (GPP), evapotranspiration (ET) and ecosystem water use efficiency (WUE), and their relationships with the event (e.g., irrigation) and climatic factors. The results showed that the desert riparian forest produced new plant biomass with 0.79 g C kg−1 of water loss during the growing season. In the study period, monthly GPP and ET was tightly coupled, and the mean cumulative GPP and ET from May–October were 676 g C m−2 and 864 mm, respectively. Daily GPP and ET had similar relationships with global radiation (Rg), air temperature (Ta) and vapor pressure deficit at monthly scale. Consequently, the seasonal variations in WUE were not obvious in the growing season, except in September. In September, the value of WUE decreased significantly with an increase in Ta (for Ta>15 °C) after irrigation, which was attributable to the increased ET and a relatively steady GPP. It is possible that the time of irrigation is able to affect the seasonal course of WUE. The study has implications that enable more rational water management to maintain the the health and activities of the riparian forest in such a hyper-arid region. |
Keywords | ecosystem water use efficiency; desert riparian forest; irrigation effects |
ANZSRC Field of Research 2020 | 410203. Ecosystem function |
410206. Landscape ecology | |
410102. Ecological impacts of climate change and ecological adaptation | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Northwest Institute of Eco-Environment and Resources, China |
School of Agricultural, Computational and Environmental Sciences | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4qwq/characteristics-of-ecosystem-water-use-efficiency-in-a-desert-riparian-forest
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