Spatial-temporal differentiations in water use of coexisting trees from a subtropical evergreen broadleaved forest in Southwest China

Agricultural and Forest Meteorology, Год журнала: 2022, Номер 316, С. 108862 - 108862

Опубликована: Фев. 12, 2022

Язык: Английский

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Factors controlling deep-profile soil organic carbon and water storage following Robinia pseudoacacia afforestation of the Loess Plateau in China

Forest Ecosystems, Год журнала: 2022, Номер 9, С. 100079 - 100079

Опубликована: Янв. 1, 2022

Afforestation is a common and effective approach used for the restoration of degraded ecosystems worldwide. In China, Robinia pseudoacacia (RP) among main non-native tree species has been widely planted in revegetation Loess Plateau. However, owing to uncertainties regarding soil water consumption carbon sequestration, it necessary assess suitability sustainability R. restoration. this study, we aimed analyse dynamic effects forest on storage (SCS) (SWS). Specifically, investigated association between content (SWC) organic (SOC) underlying factors 0–500 cm profile 10- 50-year-old chronosequence. The results obtained indicated that dynamics SWS SCS time scale could be divided into an initial reduction phase (the 20 years after afforestation) subsequent recovery (20–50 afforestation). Compared with abandoned land (AL), net accumulation was 2.51 Mg·ha−1 at 50 afforestation, whereas there 398.76 mm deficit SWS. Additionally, natural succession contributed continuous change stand structure (e.g. vegetation cover (VC), understory coverage (UVC), litter biomass (LB)). These findings indicate increases sequestration while causing deficit. Furthermore, density (SD) established make predominant contribution via its altering vegetation, soil, characteristics. Therefore, high-density plantation forests Plateau area should appropriately thinned reduce stands basis erosion control wind sand fixation, so as increase sink lower consumption, thus realizing synergistic development connotation.

Язык: Английский

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Multi-species plantation intensifies soil water competition and groundwater depletion in a water-limited desert region

Forest Ecology and Management, Год журнала: 2023, Номер 537, С. 120953 - 120953

Опубликована: Март 27, 2023

Язык: Английский

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The natural abundance of stable water isotopes method may overestimate deep-layer soil water use by trees

Hydrology and earth system sciences, Год журнала: 2023, Номер 27(1), С. 123 - 137

Опубликована: Янв. 4, 2023

Abstract. Stable water isotopes have been used extensively to study the use strategy of plants in various ecosystems. In deep vadose zone (DVZ) regions, rooting depth trees can reach several meters tens meters. However, existence roots soils does not necessarily mean occurrence root uptake, which usually occurs at a particular time during growing season. Therefore, quantifying contribution deep-layer soil (DLSW) DVZ regions using natural abundance stable may be accurate because this method assumes that always extract shallow- and water. We propose multi-step for addressing issue. First, isotopic labeling layers identifies whether absorb DLSW determines layer depths from derive their source. Next, we calculate sources based on determined above quantify trees. also compared results with method. The 11- 17-year-old apple were taken as examples analyses China's Loess Plateau. Isotopic showed uptake 11-year-old reached 300 cm blossom young fruit (BYF) stage only 100 swelling (FSW) stage, whereas consumed 0–320 layer. Overall, absorbed most (>140 cm) BYF more these than throughout addition, overestimated DLSW, especially 320–500 Our findings highlight determining helps regions.

Язык: Английский

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Water resource security assessment and prediction in a changing natural and social environment: Case study of the Yanhe Watershed, China

Ecological Indicators, Год журнала: 2023, Номер 154, С. 110594 - 110594

Опубликована: Июль 1, 2023

Water security is the backbone of regional development. However, it generally compromised by increasing competition for water resources between natural and social systems, especially in areas with limited resources. Sustainable planning requires a comprehensive analysis supply demand patterns, which difficult owing to scale mismatches data methodologies. This study investigated dynamics interrelationships semi-arid watershed Loess Plateau, China, developing system model that simulates during 1980–2020 future changes under different climate, socioeconomic development, inter-basin diversion scenarios 2021–2050. The results showed (1) end 2020, level gradually approached scarcity threshold indicated deficit index surpassing 0; (2) unfavorable climate progressive growth conditions, up 16 out 30 years simulation demonstrated insecurity form net quantity deficit; (3) project can offset such deficits short term, but potentially aggravates risk eliciting more rapid pattern. indicate curbing improving water-saving technology are instructive resource management. For Yanhe Watershed, pattern should be improved guarantee on full temporal scale. We suggest moderate rate appropriate this region efforts solidify use redlines advancement technologies essential future. provides scientific basis long-term evaluation timescale tightly coupled hydrological components modeling framework decision-makers manage sustainably.

Язык: Английский

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Snow-melt water: An important water source for Picea crassifolia in Qilian Mountains

Journal of Hydrology, Год журнала: 2022, Номер 613, С. 128441 - 128441

Опубликована: Сен. 13, 2022

Язык: Английский

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Matching root water uptake patterns to fine root and soil water distributions

Plant and Soil, Год журнала: 2023, Номер 495(1-2), С. 499 - 516

Опубликована: Ноя. 2, 2023

Язык: Английский

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Soil water use sources and patterns in shrub encroachment in semiarid grasslands of Inner Mongolia

Agricultural and Forest Meteorology, Год журнала: 2021, Номер 308-309, С. 108579 - 108579

Опубликована: Авг. 5, 2021

Язык: Английский

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Advantage of mixed trees in the trade-off between soil water storage and tree biomass: A meta-analysis from artificially planted forests in Chinese Loess Plateau

CATENA, Год журнала: 2022, Номер 214, С. 106232 - 106232

Опубликована: Март 26, 2022

Язык: Английский

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Water competition among the coexisting Platycladus orientalis, Prunus davidiana and Medicago sativa in a semi-arid agroforestry system

Agricultural Water Management, Год журнала: 2023, Номер 279, С. 108206 - 108206

Опубликована: Фев. 2, 2023

Agroforestry has been widely used for the ecological restoration construction of semi-arid regions Chinese Loess Plateau. Investigating plant water sources is crucial understanding key ecohydrological processes root uptake and relations between coexisting plants. Clarifying use strategies can help to assess sustainability vegetation in agroforestry systems provide references management. Thus, we investigated characteristics plants an system consisting Platycladus orientalis, Prunus davidiana Medicago sativa. The δD δ18O stem soil 0–300 cm layer were measured. MixSIAR model proportional similarity (PS) quantify proportion absorbed by each hydrological niche overlap results showed that combined effects rainfall recharge evapotranspiration (ET) loss resulted a decrease content (SWC) with increasing depth, SWC deep (80–300 cm) had minor variability (6.1–7.1%) throughout study period. During period, due desiccation, P. M. sativa mainly utilized from shallow (0–80 layers, contribution rate 65.4 ± 8.3%, 64.9 7.7% 73.0 0.2%, respectively. three relied on unstable (recharged rainfall) while was consistently low. This implies less resistant drought stress, thus posing threat stability system. Moreover, even July September high agroforestry, partitioning among did not increase increased ET loss. strong competition use, as indicated values (0.69–0.97) PS. Overall, low ecosystem stability. Density reduction or selection suitable species required achieve sustainable restoration.

Язык: Английский

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