Measuring interception loss and canopy storage in dryland vegetation: a brief review and evaluation of available research strategies

Dunkerley, David

doi:10.1002/(sici)1099-1085(200003)14:4<669::aid-hyp965>3.0.co;2-i

Cited by 157 publications

(148 citation statements)

References 37 publications

(50 reference statements)

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“…They have developed effective physiological drought tolerance by reducing water loss, e.g., through adjusting their photosynthetic and transpiration rate by regulating stomatal conductance and abscisic acid (ABA), titling their osmotic equilibrium by regulating the concentration of soluble sugars and inorganic ions, and removing free radicals (Ma et al, 2004. The stemflow, a vital ecohydrological flux, is involved in replenishing soil water at shallow and deep layers (Pressland, 1973), particularly the root zone (Whitford et al, 1997;Dunkerley, 2000;Yang, 2010), even during light rains (Li et al, 2009). It might allow the endemic shrubs to remain physically active during drought spells (Navar and Bryan, 1990;Navar, 2011).…”

Section: Yuan Et Al: Comparisons Of Stemflow and Its Bio-/abioticmentioning

confidence: 71%

“…Dryland shrubs generally experienced several wetting-drying cycles (Cui and Caldwell, 1997) when rains were sporadic. As an important source of rhizosphere soil moisture at dryland ecosystems (Dunkerley, 2000;Yang, 2010;Návar, 2011;Li et al, 2013), a considerable amount of stemflow could be produced by various species and infiltrated into deep soil during heavier rains. However, during lighter rains, the larger amount stemflow produced in more efficient manner might benefit xerophytic shrubs, as more soil moisture could be recharged especially at the root zone.…”

Section: Discussionmentioning

confidence: 99%

“…Note: BA is the branch inclined angle; P is the precipitation amount; CK and SP are the abbreviations of C. korshinskii and S. psammophila, respectively. available moisture in dryland ecosystems (Dunkerley, 2000;Yang, 2010;Návar, 2011;Li et al, 2013). That agreed with the findings of Dong and Zhang (2001) that S. psammophila belonged to the water-spending paradigm from the aspect of leaf water relations and anatomic features, and the finding of Ai et al (2015) that C. korshinskii belonged to the watersaving paradigm and had larger drought tolerance ability than S. psammophila from the aspect of root anatomical structure and hydraulic traits.…”

Section: Effects Of Precipitation Threshold To Produce Stemflowmentioning

confidence: 99%

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Comparisons of stemflow and its bio-/abiotic influential factors between two xerophytic shrub species

Yuan

Gao

2017

Hydrol. Earth Syst. Sci.

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Abstract. Stemflow transports nutrient-enriched precipitation to the rhizosphere and functions as an efficient terrestrial flux in water-stressed ecosystems. However, its ecological significance has generally been underestimated because it is relatively limited in amount, and the biotic mechanisms that affect it have not been thoroughly studied at the leaf scale. This study was conducted during the 2014 and 2015 rainy seasons at the northern Loess Plateau of China. We measured the branch stemflow volume (SF b ), shrub stemflow equivalent water depth (SF d ), stemflow percentage of incident precipitation (SF %), stemflow productivity (SFP), funnelling ratio (FR), the meteorological characteristics and the plant traits of branches and leaves of C. korshinskii and S. psammophila. This study evaluated stemflow efficiency for the first time with the combined results of SFP and FR, and sought to determine the inter-and intra-specific differences of stemflow yield and efficiency between the two species, as well as the specific bio-/abiotic mechanisms that affected stemflow. The results indicated that C. korshinskii had a greater stemflow yield and efficiency at all precipitation levels than that of S. psammophila. The largest inter-specific difference generally occurred at the 5-10 mm branches during rains of ≤ 2 mm. Precipitation amount was the most influential meteorological characteristic that affected stemflow yield and efficiency in these two endemic shrub species. Branch angle was the most influential plant trait on FR. For SF b , stem biomass and leaf biomass were the most influential plant traits for C. korshinskii and S. psammophila, respectively. For SFP of these two shrub species, leaf traits (the individual leaf area) and branch traits (branch size and biomass allocation pattern) had a great influence during lighter rains ≤ 10 mm and heavier rains > 15 mm, respectively. The lower precipitation threshold to start stemflow allowed C. korshinskii (0.9 mm vs. 2.1 mm for S. psammophila) to employ more rains to harvest water via stemflow. The beneficial leaf traits (e.g., leaf shape, arrangement, area, amount) might partly explain the greater stemflow production of C. korshinskii. Comparison of SF b between the foliated and manually defoliated shrubs during the 2015 rainy season indicated that the newly exposed branch surface at the defoliated period and the resulting rainfall intercepting effects might be an important mechanism affecting stemflow in the dormant season.

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Section: Yuan Et Al: Comparisons Of Stemflow and Its Bio-/abioticmentioning

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Effects Of Precipitation Threshold To Produce Stemflowmentioning

confidence: 99%

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Comparisons of stemflow and its bio-/abiotic influential factors between two xerophytic shrub species

Yuan

Gao

2017

Hydrol. Earth Syst. Sci.

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“…As the rainfall events causing these flood pulses are significantly above-average, and the vegetation cover is relatively sparse, it can be assumed that interception of rainfall from the surface of vegetation is negligible (Dunkerley, 2000).…”

Section: <Figure 3 Here Please>mentioning

confidence: 99%

Where does all the water go? Partitioning water transmission losses in a data-sparse, multi-channel and low-gradient dryland river system using modelling and remote sensing

Jarihani

Larsen

Callow

et al. 2015

Journal of Hydrology

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Where does all the water go? Partitioning water transmission losses in a data-sparse, multi-channel and low-gradient dryland river system using modelling and remote sensing, Journal of Hydrology (2015), doi: http://dx.doi.org/10.1016/j.jhydrol. 2015.08.030 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 1Where does all the water go? Partitioning water transmission losses in a data-sparse, multi-channel and low-gradient dryland river system using modelling and remote sensing and April 2012 along a 180 km reach of the Diamantina River in the Lake Eyre Basin, Australia.Transmission losses were found to be high, on average 46% of total inflow within 180 km reach segment or 7 GL/km (range: 4 to 10 GL/km). However, in 180 km reach, transmission losses vary non-linearly with flood discharge, with smaller flows resulting in higher losses (up to 68%), which diminish in higher flows (down to 24%) and in general there is a minor increase in losses with distance downstream. Partitioning these total losses into the major components shows that actual evaporation was the most significant component (21.6% of total inflow), followed by infiltration (13.2%) and terminal water storage (11.2%). Lateral inflow can be up to 200% of upstream inflow (mean = 86%) and is therefore a critical parameter in the water balance and 3 transmission loss calculations. This study shows that it is possible to constrain the water balance using hydrodynamic models in dryland river systems using remote sensing and simple field measurements to address the otherwise scarce availability of data. The results of this study also enable a better understanding of the water resources available for ecosystems in these unique multi-channel and large floodplain rivers. The combined modelling / remote sensing approach of this study can be applied elsewhere in the world to better understand the water balances and water transmission losses, important drivers of ecohydrological processes in dryland environments.

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“…Canopies of woody-plants may increase interception of rainfall (Dunkerley 2000), increase infiltration (Bhark and Small 2003) and alter the balance between evaporation and transpiration (Huxman et al 2005). We observed that the presence of Cynara was associated with greater growing-season ET (Fig.…”

Section: Discussionmentioning

confidence: 99%

The impact of invasion and subsequent removal of an exotic thistle, Cynara cardunculus, on CO2 and H2O vapor exchange in a coastal California grassland

2007

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Measuring interception loss and canopy storage in dryland vegetation: a brief review and evaluation of available research strategies

Cited by 157 publications

References 37 publications

Comparisons of stemflow and its bio-/abiotic influential factors between two xerophytic shrub species

Comparisons of stemflow and its bio-/abiotic influential factors between two xerophytic shrub species

Where does all the water go? Partitioning water transmission losses in a data-sparse, multi-channel and low-gradient dryland river system using modelling and remote sensing

The impact of invasion and subsequent removal of an exotic thistle, Cynara cardunculus, on CO2 and H2O vapor exchange in a coastal California grassland

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