Vertical distribution of fine roots of Tamarix ramosissima in an arid region of southern Nevada

Imada, Shogo; Taniguchi, Takeshi; Acharya, Kumud; Yamanaka, Norikazu

doi:10.1016/j.jaridenv.2013.01.006

Cited by 25 publications

(17 citation statements)

References 42 publications

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“…Our results are consistent with those of recent research, which investigated root distribution of saltcedar in riparian zone quantitatively and systemically. They revealed that although saltcedar is known to develop deep taproots, its root length density and biomass were concentrated at shallow soil layer (Imada et al ., ; Li et al ., ; Yu et al ., ,b). For example, Imada et al .…”

Section: Resultsmentioning

confidence: 99%

“…Several early studies speculated that facultative phreatophytes might have the ability to maintain roots in many soil layers or to develop roots rapidly into moisture‐rich layers so that they can switch water sources between different pools (Smith et al ., ; Thorburn and Walker, ). But for riparian saltcedar, recent research showed that its root length density and biomass were concentrated at shallow soil layers (Imada et al ., ; Li et al ., ; Yu et al ., b). Other studies also suggested that established saltcedar might be fixed in root architecture and would prefer to develop increased density of roots in shallow soil layers rather than grow increasingly deeper roots to maintain contact with groundwater where water table declines quickly (Shafroth et al ., ; Nippert et al ., ).…”

Section: Introductionmentioning

confidence: 99%

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Water uptake by saltcedar (Tamarix ramosissima) in a desert riparian forest: responses to intra‐annual water table fluctuation

Sun

Xiang

2015

Hydrological Processes

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There is considerable interest in naturalizing flow regime on managed rivers to slow the spread of saltcedar (Tamarix ramosissima) invasion in southwestern USA or to preserve riparian forests dominated by saltcedar and other species in northwestern China. However, little is known about the responses of established saltcedar in water sources to frequent intra‐annual fluctuation of water table resulting from this new, more dynamic flow regime. This study investigates how saltcedar at a riparian site in the middle reaches of the Heihe River, northwest China, responds in water sources use to intra‐annual water table fluctuations. Stable oxygen isotope was employed to determine accurate depth at which saltcedar obtains its water supply, and soil moisture monitoring was used to determine sources of plant‐available soil water. We found that the primary zone of water uptake by saltcedar were stable at 25–60 cm depth, but the water sources used by saltcedar switched between groundwater and soil moisture with the water table fluctuations. Saltcedar derived its water from groundwater when water table was at depth less than 60 cm but switched to soil moisture at 25–60 cm depth when water table declined. It is supposed that the well‐developed clay layer at 60–80 cm depth constrained lateral roots of saltcedar to the soil layers above 60 cm, while the fine‐textured soils at this site, which were periodically resaturated by rising groundwater before the stored soil moisture had become depleted, provided an important water reservoir for saltcedar when groundwater dropped below the primary zone of fine roots. The root distribution of saltcedar may also be related to local groundwater history. The quick decline in water table in the early 1980s when the riparian saltcedar had established may strand its roots in the shallow unsaturated zone. We suggested that raising the water table periodically instead of maintaining it invariably above the rooting depth could sustain desired facultative phreatophytes while maximizing water deliveries. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water uptake by saltcedar (Tamarix ramosissima) in a desert riparian forest: responses to intra‐annual water table fluctuation

Sun

Xiang

2015

Hydrological Processes

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“…A linear reduction in fine root growth with decreasing soil water at less than field capacity has been reported for Populus alba cuttings (Imada et al, 2008). A weak but positive relationship between fine root biomass and soil water has also been reported for Tamarix ramosissima (Imada et al, 2013).…”

Section: Fine Root Distributions Of Shelterbelt Treesmentioning

confidence: 87%

“…The relationship between the mean soil water content during the growing season of Gansu Poplars and relative fine root mass density to the total fine roots in different soil layers. from the soil where N concentrations were higher (Imada et al, 2013). The N concentration profiles in the shelterbelt were not investigated in this study but future studies should address the effect of available nutrients on fine root distributions of the shelterbelt trees in arid inland river basins.…”

Section: Fine Root Distributions Of Shelterbelt Treesmentioning

confidence: 95%

“…Previous studies have found that fine root distribution was closely related to rainfall, soil water, soil texture and the water table (Dawson and Pate, 1996;Wilcoxa et al, 2004;Schenk and Jackson, 2005;Gang et al, 2012;Imada et al, 2013;Ferrante et al, 2014;Padilla et al, 2015). Typically, most of the fine roots of plants are concentrated in the upper soil layers and the density of the roots notably decreases with increasing soil depth (Schenk and Jackson, 2002;Schenk, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China

Xiao

Huang

2016

Journal of Arid Environments

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Soil spatial heterogeneity created by river–sea interaction influences Tamarix chinensis root features in the Yellow River Delta

Shi,

Suo,

Wang

et al. 2024

Earth Surf Processes Landf

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Salt‐tolerant Tamarix chinensis roots are crucial in preserving wetland soil and carbon sequestration, which is essential for wetland ecology. Soil‐water‐salt conditions influence the growth of these roots in coastal saline areas, but the specific factors and their effects remain unclear. Using principal component and partial least square–structural equation modelling (SEM) methods, we studied T. chinensis root features in six Yellow River delta communities. Results showed varied root features across locations, with larger roots further inland. Root growth negatively correlated with soil texture and salinity and positively with groundwater levels. Soil texture and salinity decreased with distance from the coast, while groundwater increased with distance from the Yellow River. This suggests that geographical location influences soil‐water‐salt conditions, impacting root characteristics. The principal component analysis–derived root feature index captured 56.7% of root feature variation. SEM revealed geographical locations indirectly influence root features, with the Yellow River's proximity primarily affecting them through groundwater and coastal distance influencing via soil sand content and salinity. The study underscores the importance of these findings for wetland conservation and ecology.

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Vertical distribution of fine roots of Tamarix ramosissima in an arid region of southern Nevada

Cited by 25 publications

References 42 publications

Water uptake by saltcedar (Tamarix ramosissima) in a desert riparian forest: responses to intra‐annual water table fluctuation

Water uptake by saltcedar (Tamarix ramosissima) in a desert riparian forest: responses to intra‐annual water table fluctuation

Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China

Soil spatial heterogeneity created by river–sea interaction influences Tamarix chinensis root features in the Yellow River Delta

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