Groundwater decline and tree change in floodplain landscapes: Identifying non-linear threshold responses in canopy condition

Kath, Jarrod; Reardon‐Smith, Kathryn; Brocque, Andrew F. Le; Dyer, Fiona; Dafny, Elad; Fritz, Leila Lucia; Batterham, M.

doi:10.1016/j.gecco.2014.09.002

Cited by 49 publications

(42 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, Barbeta et al (2015) studied the shift of groundwater contribution to Quercus ilex, Arbutus unedo and Phillyrea latifolia in the Lberian Peninsula, Spain. In the regional scale, water table decline resulted in the reduction of groundwater contribution to trees and the dieback of trees occurred accordingly (Cunningham et al, 2011 andKath et al, 2014). As trees have deeper roots and no irrigation in comparison to crops, they are more dependent on groundwater and more sensitive to the water table drops, particularly during dry seasons (Zhu et al, 2009 andPinto et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Interaction between groundwater and trees in an arid site: Potential impacts of climate variation and groundwater abstraction on trees

Yin

Zhou

Huang

et al. 2015

Journal of Hydrology

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Interaction between groundwater and trees in an arid site: Potential impacts of climate variation and groundwater abstraction on trees

Yin

Zhou

Huang

et al. 2015

Journal of Hydrology

View full text Add to dashboard Cite

“…Previous groundwater dependence studies suggest native vegetation may be utilising groundwater resources in the area (Kath et al, 2014;National Water Commission, 2012b;Reardon-Smith, 2011), although these studies have been limited in their ability to provide precise locations, timing or magnitude of groundwater use by vegetation.…”

Section: Land Cover/land Usementioning

confidence: 99%

“…Barron et al, 2014;Fu and Burgher, 2015;Gou et al, 2015;Kath et al, 2014) make inferences about the potential for aquifer groundwater use by vegetation based on the persistence of vegetation wetness and/or greenness under conditions where shallow soil water is assumed to be fully depleted. As these empirical correlation methods compare vegetation characteristics between two fixed points in time (i.e.…”

Section: Surface Water and Assessment Tool (Swat) -Modular Three-dimementioning

confidence: 99%

“…The role of groundwater in maintaining ecosystem function is being increasingly recognised, particularly during droughts (Amlin and Rood, 2002;Froend and Sommer, 2010;Kath et al, 2014;Naumburg et al, 2005). Globally increasing demand for groundwater resources in intensive multiuser landscapes is necessitating development of new methods for managing the spatio-temporal components of this resource and its associated impacts on natural groundwater-dependent ecosystems (GDEs).…”

Section: Introductionmentioning

confidence: 99%

“…deep root-zone soil water and groundwater; Figure 1-1) by vegetation at landscape, regional, and continental scales (Glenn et al, 2007;Guerschman et al, 2009a), through: (1) empirical correlation studies between measured reflectance from plants and physiological properties (e.g. Barron et al, 2014;Fu and Burgher, 2015;Gou et al, 2015;Kath et al, 2014), (2) reflectance-based evapotranspiration (ET) studies (e.g. Guerschman et al, 2009a;Maselli et al, 2014;Nagler et al, 2008); or (3) thermal-based, surface energy balance (SEB) ET measurement and modelling studies (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A land surface temperature model-data differencing approach to quantifying subsurface water use by vegetation: Application in the Condamine region, south-eastern Queensland

Gow¹

View full text Add to dashboard Cite

Water plays a crucial role in plant community and landscape function; plants use stomata to regulate water loss via transpiration as the 'cost' of carbon assimilation, which in turn regulates surface temperature of leaves. Presently there are a number of aspects of vegetation water-use dynamics that are poorly understood, including the degree of dependence on water sources at different depths in the soil profile; timing, frequency, duration and magnitude of water use; and ecosystem strategies to acquiring water from different sources as water availability varies.The research presented in this thesis aimed to: (1) quantify timing and frequency of the use of subsurface water by woody vegetation, (2) quantify the confidence of these predictions, and (3) identify subsurface water-use strategies and physiological responses employed by woody vegetation with variation in climatic and water-deficit conditions. These aims were achieved through development, application and assessment of a novel land surface temperature (LST) model-data differencing approach applied to a subtropical woodland environment in eastern Australia. The approach detects subsurface water use by vegetation in space and time within 95% confidence intervals, through differences in modelled LST (Ts.mod) and satellite observations of LST (Ts.obs) after accounting for random and systematic error in the model and data.Modelled LST was derived using a two-layer surface energy balance (SEB) model and captures water use from surface water and soil water in the top 30 cm of the soil profile (i.e. shallow soil water). Satellite observations of LST were obtained from Terra-MODIS thermal infrared imagery and captures water use from all available sources. When compared, temperature differences between independently-derived Ts.mod and Ts.obs reveal subsurface water use (i.e. below 30 cm depth) plus systematic and random error. Systematic error or bias, was estimated from temperature differences of grassland vegetation based on an assumption that these vegetation communities do not access subsurface water under certain climatic conditions. Therefore Ts.mod should equal Ts.obs.Random error in Ts.obs was estimated from the literature while sensitivity and uncertainty analyses were used to quantify Ts.mod random error arising from five SEB model resistance terms and their associated input parameters. A Student's t-test was then used to account for systematic and random error in the detection of subsurface water use by vegetation within 95% confidence intervals.The LST model-data differencing approach was applied in a 3200 km 2 region of the subtropical Condamine River Catchment, south-eastern Queensland Australia. The study area contains a mixture of native remnant vegetation, agriculturally-intensive areas, and coal seam gas development. Extensive eucalypt woodlands dominate low-lying hill slopes, while rainfed pastoral grasses and irrigated crops are common throughout the alluvial floodplain and topographic lows adjacent to hill slopes. Timing and frequency ...

show abstract

Global distribution of groundwater‐vegetation spatial covariation

Koirala

Jung

Reichstein

et al. 2017

Geophysical Research Letters

View full text Add to dashboard Cite

Groundwater is an integral component of the water cycle, and it also influences the carbon cycle by supplying moisture to ecosystems. However, the extent and determinants of groundwater‐vegetation interactions are poorly understood at the global scale. Using several high‐resolution data products, we show that the spatial patterns of ecosystem gross primary productivity and groundwater table depth are correlated during at least one season in more than two thirds of the global vegetated area. Positive relationships, i.e., larger productivity under shallower groundwater table, predominate in moisture‐limited dry to mesic conditions with herbaceous and shrub vegetation. Negative relationships, i.e., larger productivity under deeper groundwater, predominate in humid climates with forests, possibly indicating a drawdown of groundwater table due to substantial ecosystem water use. Interestingly, these opposite groundwater‐vegetation interactions are primarily associated with differences in vegetation than with climate and surface characteristics. These findings put forth the first evidence, and a need for better representation, of extensive and non‐negligible groundwater‐vegetation interactions at the global scale.

show abstract

Groundwater decline and tree change in floodplain landscapes: Identifying non-linear threshold responses in canopy condition

Cited by 49 publications

References 58 publications

Interaction between groundwater and trees in an arid site: Potential impacts of climate variation and groundwater abstraction on trees

Interaction between groundwater and trees in an arid site: Potential impacts of climate variation and groundwater abstraction on trees

A land surface temperature model-data differencing approach to quantifying subsurface water use by vegetation: Application in the Condamine region, south-eastern Queensland

Global distribution of groundwater‐vegetation spatial covariation

Contact Info

Product

Resources

About