Intrinsic climate dependency of ecosystem light and water-use-efficiencies across Australian biomes

Hao Shi; Longhui Li; Derek Eamus; James Cleverly; Alfredo Huete; Jason Beringer; Qiang Yu; Eva Van Gorsel; Lindsay Hutley

doi:10.1088/1748-9326/9/10/104002

Intrinsic climate dependency of ecosystem light and water-use-efficiencies across Australian biomes

Hao Shi, Longhui Li, Derek Eamus, James Cleverly, Alfredo Huete, Jason Beringer, Qiang Yu, Eva Van Gorsel, Lindsay Hutley

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Abstract

The sensitivity of ecosystem gross primary production (GPP) to availability of water and photosynthetically active radiation (PAR) differs among biomes. Here we investigated variations of ecosystem light-use-efficiency (eLUE: GPP/PAR) and water-use-efficiency (eWUE: GPP/evapotranspiration) among seven Australian eddy covariance sites with differing annual precipitation, species composition and temperature. Changes to both eLUE and eWUE were primarily correlated with atmospheric vapor pressure deficit (VPD) at multiple temporal scales across biomes, with minor additional correlations observed with soil moisture and temperature. The effects of leaf area index on eLUE and eWUE were also relatively weak compared to VPD, indicating an intrinsic dependency of eLUE and eWUE on climate. Additionally, eLUE and eWUE were statistically different for biomes between summer and winter, except eWUE for savannas and the grassland. These findings will improve our understanding of how light- and water-use traits in Australian ecosystems may respond to climate change.

Original language	English
Article number	104002
Pages (from-to)	1-12
Number of pages	12
Journal	Environmental Research Letters
Volume	9
Issue number	10
DOIs	https://doi.org/10.1088/1748-9326/9/10/104002
Publication status	Published - 2014

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title = "Intrinsic climate dependency of ecosystem light and water-use-efficiencies across Australian biomes",

abstract = "The sensitivity of ecosystem gross primary production (GPP) to availability of water and photosynthetically active radiation (PAR) differs among biomes. Here we investigated variations of ecosystem light-use-efficiency (eLUE: GPP/PAR) and water-use-efficiency (eWUE: GPP/evapotranspiration) among seven Australian eddy covariance sites with differing annual precipitation, species composition and temperature. Changes to both eLUE and eWUE were primarily correlated with atmospheric vapor pressure deficit (VPD) at multiple temporal scales across biomes, with minor additional correlations observed with soil moisture and temperature. The effects of leaf area index on eLUE and eWUE were also relatively weak compared to VPD, indicating an intrinsic dependency of eLUE and eWUE on climate. Additionally, eLUE and eWUE were statistically different for biomes between summer and winter, except eWUE for savannas and the grassland. These findings will improve our understanding of how light- and water-use traits in Australian ecosystems may respond to climate change. ",

keywords = "biomes, climate, Spatial patterns, Temporal scale, biome, eddy covariance, evapotranspiration, light use efficiency, photosynthetically active radiation, primary production, savanna, sensitivity analysis, soil moisture, temperature effect, water use efficiency, Australia",

author = "Hao Shi and Longhui Li and Derek Eamus and James Cleverly and Alfredo Huete and Jason Beringer and Qiang Yu and {Van Gorsel}, Eva and Lindsay Hutley",

year = "2014",

doi = "10.1088/1748-9326/9/10/104002",

language = "English",

volume = "9",

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journal = "Environmental Research Letters",

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publisher = "Institute of Physics Publishing (IOP Publishing)",

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T1 - Intrinsic climate dependency of ecosystem light and water-use-efficiencies across Australian biomes

AU - Shi, Hao

AU - Li, Longhui

AU - Eamus, Derek

AU - Cleverly, James

AU - Huete, Alfredo

AU - Beringer, Jason

AU - Yu, Qiang

AU - Van Gorsel, Eva

AU - Hutley, Lindsay

PY - 2014

Y1 - 2014

N2 - The sensitivity of ecosystem gross primary production (GPP) to availability of water and photosynthetically active radiation (PAR) differs among biomes. Here we investigated variations of ecosystem light-use-efficiency (eLUE: GPP/PAR) and water-use-efficiency (eWUE: GPP/evapotranspiration) among seven Australian eddy covariance sites with differing annual precipitation, species composition and temperature. Changes to both eLUE and eWUE were primarily correlated with atmospheric vapor pressure deficit (VPD) at multiple temporal scales across biomes, with minor additional correlations observed with soil moisture and temperature. The effects of leaf area index on eLUE and eWUE were also relatively weak compared to VPD, indicating an intrinsic dependency of eLUE and eWUE on climate. Additionally, eLUE and eWUE were statistically different for biomes between summer and winter, except eWUE for savannas and the grassland. These findings will improve our understanding of how light- and water-use traits in Australian ecosystems may respond to climate change.

AB - The sensitivity of ecosystem gross primary production (GPP) to availability of water and photosynthetically active radiation (PAR) differs among biomes. Here we investigated variations of ecosystem light-use-efficiency (eLUE: GPP/PAR) and water-use-efficiency (eWUE: GPP/evapotranspiration) among seven Australian eddy covariance sites with differing annual precipitation, species composition and temperature. Changes to both eLUE and eWUE were primarily correlated with atmospheric vapor pressure deficit (VPD) at multiple temporal scales across biomes, with minor additional correlations observed with soil moisture and temperature. The effects of leaf area index on eLUE and eWUE were also relatively weak compared to VPD, indicating an intrinsic dependency of eLUE and eWUE on climate. Additionally, eLUE and eWUE were statistically different for biomes between summer and winter, except eWUE for savannas and the grassland. These findings will improve our understanding of how light- and water-use traits in Australian ecosystems may respond to climate change.

KW - biomes

KW - climate

KW - Spatial patterns

KW - Temporal scale

KW - biome

KW - eddy covariance

KW - evapotranspiration

KW - light use efficiency

KW - photosynthetically active radiation

KW - primary production

KW - savanna

KW - sensitivity analysis

KW - soil moisture

KW - temperature effect

KW - water use efficiency

KW - Australia

U2 - 10.1088/1748-9326/9/10/104002

DO - 10.1088/1748-9326/9/10/104002

M3 - Article

VL - 9

SP - 1

EP - 12

JO - Environmental Research Letters

JF - Environmental Research Letters

SN - 1748-9326

IS - 10

M1 - 104002

ER -

Intrinsic climate dependency of ecosystem light and water-use-efficiencies across Australian biomes

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