PoplarV1, Main, Exploration, bibRecord, 002790

Assessment of hydraulic redistribution on desert riparian forests in an extremely arid area.

Identifieur interne : 002790 ( Main/Exploration ); précédent : 002789; suivant : 002791

Assessment of hydraulic redistribution on desert riparian forests in an extremely arid area.

Auteurs : Xing-Ming Hao [République populaire de Chine] ; Yang Li ; Hai-Jun Deng

Source :

Environmental monitoring and assessment [ 1573-2959 ] ; 2013.

RBID : pubmed:23793541

Descripteurs français

KwdFr :
- Arbres (MeSH), Chine (MeSH), Climat désertique (MeSH), Environnement (MeSH), Hydrologie (MeSH), Mouvements de l'eau (MeSH), Rivières (composition chimique), Surveillance de l'environnement (MeSH).
MESH :
- composition chimique : Rivières.
- Arbres, Chine, Climat désertique, Environnement, Hydrologie, Mouvements de l'eau, Surveillance de l'environnement.
Wicri :
- geographic : République populaire de Chine.

English descriptors

KwdEn :
- China (MeSH), Desert Climate (MeSH), Environment (MeSH), Environmental Monitoring (MeSH), Hydrology (MeSH), Rivers (chemistry), Trees (MeSH), Water Movements (MeSH).
MESH :
- geographic : China.
- chemistry : Rivers.
- Desert Climate, Environment, Environmental Monitoring, Hydrology, Trees, Water Movements.

Abstract

The roots of Populus euphratica, a plant that grows in the lower reaches of the Tarim River, Northwest China, exhibit a significant level of hydraulic redistribution; however, quantitative assessments of the water-sharing process and its ecological effects are limited. This study was designed to obtain such data using an assessment model based on field observation parameters, including soil water content (soil water potential), root distribution, and stable isotope δ(18)O values of soil and plant samples during the entire growing season. The results showed that hydraulic redistribution in P. euphratica can be detected in 0-120 cm soil layers, with the amount of hydraulically redistributed water (HRW) in the soil found at different depths as follows: 60-80 > 40-60 > 20-40 > 0-20 > 80-100 > 100-120 cm. The variations in HRW in soil layers can be partly attributed to the vertical distribution of roots. The denser roots found at greater depths positively influenced the amount of redistributed water in lower soil layers. During the growing season, the amount of HRW reached a daily average of 0.27 mm, which allowed increased transpiration and provided an adequate water supply to herbs. Based on the stable isotope (δ(18)O) data, the amount of HRW provided by the roots of P. euphratica could meet 22-41% of its water demand.

DOI: 10.1007/s10661-013-3310-4
PubMed: 23793541

Affiliations:

République populaire de Chine

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Le document en format XML

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<author><name sortKey="Hao, Xing Ming" sort="Hao, Xing Ming" uniqKey="Hao X" first="Xing-Ming" last="Hao">Xing-Ming Hao</name>
<affiliation wicri:level="1"><nlm:affiliation>State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, Urumqi, Xinjiang, 830011, People's Republic of China, haoxm@ms.xjb.ac.cn.</nlm:affiliation>
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<author><name sortKey="Li, Yang" sort="Li, Yang" uniqKey="Li Y" first="Yang" last="Li">Yang Li</name>
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<term>Environmental Monitoring (MeSH)</term>
<term>Hydrology (MeSH)</term>
<term>Rivers (chemistry)</term>
<term>Trees (MeSH)</term>
<term>Water Movements (MeSH)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (MeSH)</term>
<term>Chine (MeSH)</term>
<term>Climat désertique (MeSH)</term>
<term>Environnement (MeSH)</term>
<term>Hydrologie (MeSH)</term>
<term>Mouvements de l'eau (MeSH)</term>
<term>Rivières (composition chimique)</term>
<term>Surveillance de l'environnement (MeSH)</term>
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<term>Chine</term>
<term>Climat désertique</term>
<term>Environnement</term>
<term>Hydrologie</term>
<term>Mouvements de l'eau</term>
<term>Surveillance de l'environnement</term>
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<front><div type="abstract" xml:lang="en">The roots of Populus euphratica, a plant that grows in the lower reaches of the Tarim River, Northwest China, exhibit a significant level of hydraulic redistribution; however, quantitative assessments of the water-sharing process and its ecological effects are limited. This study was designed to obtain such data using an assessment model based on field observation parameters, including soil water content (soil water potential), root distribution, and stable isotope δ(18)O values of soil and plant samples during the entire growing season. The results showed that hydraulic redistribution in P. euphratica can be detected in 0-120 cm soil layers, with the amount of hydraulically redistributed water (HRW) in the soil found at different depths as follows: 60-80 > 40-60 > 20-40 > 0-20 > 80-100 > 100-120 cm. The variations in HRW in soil layers can be partly attributed to the vertical distribution of roots. The denser roots found at greater depths positively influenced the amount of redistributed water in lower soil layers. During the growing season, the amount of HRW reached a daily average of 0.27 mm, which allowed increased transpiration and provided an adequate water supply to herbs. Based on the stable isotope (δ(18)O) data, the amount of HRW provided by the roots of P. euphratica could meet 22-41% of its water demand.</div>
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Assessment of hydraulic redistribution on desert riparian forests in an extremely arid area.

Assessment of hydraulic redistribution on desert riparian forests in an extremely arid area.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki