Indicators of water use efficiency across diverse agroecosystems and spatiotemporal scales

Hoover, David L.; Abendroth, Lori; Browning, Dawn M.; Saha, Amartya; Snyder, Keirith A.; Wagle, Pradeep; Witthaus, Lindsey; Baffaut, Claire; Bosch, David D.; Bracho, Rosvel; Busch, Dennis; Clark, Patrick E.; Ellsworth, Patrick Z.; Fay, Philip A.; Flerchinger, G. N.; Kearney, Sean P.; Levers, Lucia; Saliendra, Nicanor Z.; Schmer, Marty R.; Schomberg, Harry H.; Scott, Russell L.

doi:10.1016/j.scitotenv.2022.160992

Cited by 27 publications

(20 citation statements)

References 124 publications

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“…This suggested that the strengthened E WA‐GPP at short time scales, while a stable E WA‐GPP at multi‐decadal time scales. It is possible that increase and regime shifts in precipitation and evapotranspiration primarily drive E WA‐GPP at shorter time scales, while vegetation may adapt to changes in water conditions by adjusting its physiological and ecological traits at longer time scales, thereby reducing E WA‐GPP (Hoover et al., 2023; Konapala et al., 2020; Yang, Feng, et al., 2022). Therefore, it is crucial to pay more attention to the impacts of WA variability at shorter time scales on vegetation GPP in the future.…”

Section: Discussionmentioning

confidence: 99%

“…This may be due to various climatic limitations and biodiversity-related water stability, such as ENF and EBF being mainly in temperatureand radiation-limited regions, while MF exhibited high stability due to high biodiversity (Huang & Xia, 2019;Isbell et al, 2015;Liu et al, 2022). (Hoover et al, 2023;Konapala et al, 2020;Yang, Feng, et al, 2022). Therefore, it is crucial to pay more attention to the impacts of WA variability at shorter time scales on vegetation GPP in the future.…”

Section: Relationships Between Gpp and Wa At Different Time Scalesmentioning

confidence: 99%

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The strengthened impact of water availability at interannual and decadal time scales on vegetation GPP

Liang,

Zhang,

Wang

et al. 2024

Global Change Biology

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Water availability (WA) is a key factor influencing the carbon cycle of terrestrial ecosystems under climate warming, but its effects on gross primary production (EWA‐GPP) at multiple time scales are poorly understood. We used ensemble empirical mode decomposition (EEMD) and partial correlation analysis to assess the WA‐GPP relationship (RWA‐GPP) at different time scales, and geographically weighted regression (GWR) to analyze their temporal dynamics from 1982 to 2018 with multiple GPP datasets, including near‐infrared radiance of vegetation GPP, FLUXCOM GPP, and eddy covariance–light‐use efficiency GPP. We found that the 3‐ and 7‐year time scales dominated global WA variability (61.18% and 11.95%), followed by the 17‐ and 40‐year time scales (7.28% and 8.23%). The long‐term trend also influenced 10.83% of the regions, mainly in humid areas. We found consistent spatiotemporal patterns of the EWA‐GPP and RWA‐GPP with different source products: In high‐latitude regions, RWA‐GPP changed from negative to positive as the time scale increased, while the opposite occurred in mid‐low latitudes. Forests had weak RWA‐GPP at all time scales, shrublands showed negative RWA‐GPP at long time scales, and grassland (GL) showed a positive RWA‐GPP at short time scales. Globally, the EWA‐GPP, whether positive or negative, enhanced significantly at 3‐, 7‐, and 17‐year time scales. For arid and humid zones, the semi‐arid and sub‐humid zones experienced a faster increase in the positive EWA‐GPP, whereas the humid zones experienced a faster increase in the negative EWA‐GPP. At the ecosystem types, the positive EWA‐GPP at a 3‐year time scale increased faster in GL, deciduous broadleaf forest, and savanna (SA), whereas the negative EWA‐GPP at other time scales increased faster in evergreen needleleaf forest, woody savannas, and SA. Our study reveals the complex and dynamic EWA‐GPP at multiple time scales, which provides a new perspective for understanding the responses of terrestrial ecosystems to climate change.

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Section: Discussionmentioning

confidence: 99%

Section: Relationships Between Gpp and Wa At Different Time Scalesmentioning

confidence: 99%

The strengthened impact of water availability at interannual and decadal time scales on vegetation GPP

Liang,

Zhang,

Wang

et al. 2024

Global Change Biology

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“…The conclusions exhibit that renewable energy is crucial in green for the nexus of food and water productivity, and authorities must be established to ensure the future transition of REC. Moreover, (Hoover et al, 2023) scrutinized REC as one of the indicators of water productivity and food production efficiency. The authors observed that REC should ensure sustainable agriculture growth, food productivity, and water efficiency in the long run.…”

Section: Literature Reviewmentioning

confidence: 99%

Natural resources, food, energy and water: Structural shocks, food production and clean energy for USA in the view of COP27

Zhang,

Wang,

et al. 2024

Land Degrad Dev

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There is a notable scarcity of literature addressing the complex affiliation amidst natural resources, water productivity (WPROD), and the food production index (FPI). Existing research focuses on emerging and developing countries, primarily centering on the initial objectives of sustainable development. To bridge this literature gap, our research delves into the nexus of WPROD, FPI, and total land resources (TLRS). Additionally, the study explores the persuasive roles of income (GDP) and renewable energy consumption (REC). Employing time series methodologies, we utilize the DF‐GLS unit root assessment to assess the variable static method and the Bayer‐Hanck test to scrutinize long‐term equilibrium. The primary analysis employs the least squares approach with breakpoints, supplemented by the Robust least squares method for validation. For causal relationships between variables, we deployed the Granger causality approach. Our outcomes disclose that variables are static at the first difference, indicating long‐run equilibrium among all variables. Empirical outcomes suggest a resource curse associated with TLRS, as it negatively influences both WPROD and FPI, regardless of breaks. The increase in coefficients of land resources by 1% causes decrease in water productivity and food production by −0.35% and −0.185%. In contrast, GDP and renewable energy positively impact water productivity and food production index, even in the presence of structural breaks. Robustness checks yield‐mixed outcomes, though the overall results remain significant and consistent with the main methods. Causality analysis indicates a bi‐directional linkage between natural resources, renewable energy, and water productivity, and food production, while GDP demonstrates a uni‐directional linkage in the study. We provide relevant policies under the targets of COP 27 to manage land resources in the USA.

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“…Characteristics measured included the net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO 2 concentration (Ci) and transpiration rate (Tr) [2]. Following Hoover et al [20], the Pn/Tr ratio was taken as an estimate of instantaneous water use efficiency (WUE ins ) and the ratio between Pn/Gs, which is known as intrinsic water use efficiency (WUE in ). In the growth stage, the same leaves were chosen to measure the SPAD value with a portable chlorophyll meter (SPAD-502, Minolta, Tokyo, Japan) according to the method of Nakanishi et al [21].…”

Section: Agronomic Traits Spad Value Photosynthetic Characteristics A...mentioning

confidence: 99%

Field Examinations on the Application of Novel Biochar-Based Microbial Fertilizer on Degraded Soils and Growth Response of Flue-Cured Tobacco (Nicotiana tabacum L.)

Yang,

Zhang,

et al. 2024

Plants

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Southwestern China is receiving excessive chemical fertilizers to meet the challenges of continuous cropping. These practices are deteriorating the soil environment and affecting tobacco (Nicotiana tabacum L.) yield and quality adversely. A novel microbially enriched biochar-based fertilizer was synthesized using effective microorganisms, tobacco stalk biochar and basal fertilizer. A field-scale study was conducted to evaluate the yield response of tobacco grown on degraded soil amended with our novel biochar-based microbial fertilizer (BF). Four treatments of BF (0%, 1.5%, 2.5% and 5%) were applied in the contaminated field to grow tobacco. The application of BF1.5, BF2.5 and BF5.0 increased the available water contents by 9.47%, 1.18% and 2.19% compared to that with BF0 respectively. Maximum growth of tobacco in terms of plant height and leaf area was recorded for BF1.5 compared to BF0. BF1.5, BF2.5 and BF5.0 increased SPAD by 13.18–40.53%, net photosynthetic rate by 5.44–60.42%, stomatal conductance by 8.33–44.44%, instantaneous water use efficiency by 55.41–93.24% and intrinsic water use efficiency by 0.09–24.11%, while they decreased the intercellular CO2 concentration and transpiration rate by 3.85–6.84% and 0.29–47.18% relative to BF0, respectively (p < 0.05). The maximum increase in tobacco yield was recorded with BF1.5 (23.81%) compared to that with BF0. The present study concludes that the application of BF1.5 improves and restores the degraded soil by improving the hydraulic conductivity and by increasing the tobacco yield.

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Indicators of water use efficiency across diverse agroecosystems and spatiotemporal scales

Cited by 27 publications

References 124 publications

The strengthened impact of water availability at interannual and decadal time scales on vegetation GPP

The strengthened impact of water availability at interannual and decadal time scales on vegetation GPP

Natural resources, food, energy and water: Structural shocks, food production and clean energy for USA in the view of COP27

Field Examinations on the Application of Novel Biochar-Based Microbial Fertilizer on Degraded Soils and Growth Response of Flue-Cured Tobacco (Nicotiana tabacum L.)

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