Spatio-temporal patterns of oasis dynamics in China’s drylands between 1987 and 2017

Chen, Peng; Wang, Shuai; Liu, Yanxu; Wang, Yaping; Li, Zidong; Wang, Yijia; Zhang, Haoyu; Zhang, Yaosheng

doi:10.1088/1748-9326/ac740b

Cited by 17 publications

(18 citation statements)

References 57 publications

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“…Most of these counties are located in the Kubuqi Desert, the Hexi Corridor, the northern foothills of the Tianshan Mountains, and the Aksu River and Tarim Main River regions. Moreover, some of these counties have suffered from water shortages, as also evidenced by previous observations (e.g., soil drying and groundwater depletion in some oasis areas) (P. Chen et al., 2022b; Xie et al., 2014; J. Yao et al., 2022). Although total water availability at the oasis scale still has capacity for use, the monthly water deficit has experienced an increasing trend at the county scale.…”

Section: Discussionsupporting

confidence: 59%

“…Previous studies of hydrological processes in oases have reported that oasis expansion intensifies regional evapotranspiration (Y. Zhou et al., 2018), and that rapid revegetation and reclamation of land for cropland by irrigation have caused some oases in the Kubuqi desert (P. Chen et al., 2022b), WeiGan–KuChe River basin (Maihemuti et al., 2021), Manas River basin (Yang et al., 2019; Q. Zhang et al., 2012), and Heihe River basin (Z. Lu et al., 2015) to experience soil desiccation and groundwater overdraw. However, these studies mainly analyzed relationships between oasis dynamics and evapotranspiration and soil moisture, or used observational data and model simulations to estimate watershed‐scale water dynamics (Maihemuti et al., 2021; D. Zhou et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies of hydrological processes in oases have reported that oasis expansion intensifies regional evapotranspiration (Y. Zhou et al, 2018), and that rapid revegetation and reclamation of land for cropland by irrigation have caused some oases in the Kubuqi desert (P. Chen et al, 2022b), WeiGan-KuChe River basin (Maihemuti et al, 2021), Manas River basin (Yang et al, 2019;Q. Zhang et al, 2012), and Heihe River basin (Z.…”

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confidence: 99%

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Water Availability in China's Oases Decreased Between 1987 and 2017

et al. 2023

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Oases are the most dynamic, productive, and vulnerable ecosystems in drylands and are centers of human life and economic development in arid and semi-arid regions (X. Li et al., 2016;S. Zhou et al., 2015). In China, oases support the livelihoods of tens of millions of inhabitants, and maintaining the stability of oasis ecosystems is essential for regional ecological security and sustainable development (P. Chen et al., 2022a). Under climate change and expanded human activity, China's oases have undergone a significant expansion during the past three decades (P. Chen et al., 2022a), which has profoundly affected regional water budgets and ecosystem services (

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Section: Discussionsupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Water Availability in China's Oases Decreased Between 1987 and 2017

et al. 2023

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“…Quantitative assessment of the interannual variability in grassland landscape patterns in response to their ecosystem service values is a current research hot spot [ 107 ]. Monitoring the spatial and temporal dynamics of grassland areas can help decision makers to plan the use of grassland in a rational manner and achieve the sustainable development of grassland [ 108 ]. Landscape changes directly affect changes in the demand and supply of ecosystem services.…”

Section: Resultsmentioning

confidence: 99%

Research Progress of Grassland Ecosystem Structure and Stability and Inspiration for Improving Its Service Capacity in the Karst Desertification Control

Xiong

Song

et al. 2023

Plants

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The structure and stability of grassland ecosystems have a significant impact on biodiversity, material cycling and productivity for ecosystem services. However, the issue of the structure and stability of grassland ecosystems has not been systematically reviewed. Based on the Web of Science (WOS) and China National Knowledge Infrastructure (CNKI) databases, we used the systematic-review method and screened 133 papers to describe and analyze the frontiers of research into the structure and stability of grassland ecosystems. The research results showed that: (1) The number of articles about the structure and stability of grassland ecosystems is gradually increasing, and the research themes are becoming increasingly diverse. (2) There is a high degree of consistency between the study area and the spatial distribution of grassland. (3) Based on the changes in ecosystem patterns and their interrelationships with ecosystem processes, we reviewed the research progress and landmark results on the structure, stability, structure–stability relationship and their influencing factors of grassland ecosystems; among them, the study of structure is the main research focus (51.12%), followed by the study of the influencing factors of structure and stability (37.57%). (4) Key scientific questions on structural optimization, stability enhancement and harmonizing the relationship between structure and stability are explored. (5) Based on the background of karst desertification control (KDC) and its geographical characteristics, three insights are proposed to optimize the spatial allocation, enhance the stability of grassland for rocky desertification control and coordinate the regulation mechanism of grassland structure and stability. This study provided some references for grassland managers and relevant policy makers to optimize the structure and enhance the stability of grassland ecosystems. It also provided important insights to enhance the service capacity of grassland ecosystems in KDC.

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“…Li et al, 2016). Grassland, as the primary component of oases, plays a vital role in preventing desert encroachment and maintaining oasis stability, in addition to providing a wide range of ecosystem services (Chen et al, 2022;Ge et al, 2022; K. Zhang et al, 2017). In China, oasis grasslands are threatened by the expansion of cropland.…”

Section: Introductionmentioning

confidence: 99%

Spatio‐Temporal Dynamics of Aboveground Biomass in China's Oasis Grasslands Between 1989 and 2021

Chen,

Wang,

Liu

et al. 2024

Earth's Future

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Grassland provides multiple ecosystem services and plays a key role in preventing desert encroachment and maintaining oasis stability. In China, the area of cropland in oases has expanded significantly in recent decades, which results in a rapid increase in agricultural water demand and encroachment on grassland subsistence space. However, our knowledge about how the expansion of cropland affects oasis grasslands remains limited. We used machine learning, temporal segmentation of spectral trajectories, and maximum covariance analysis to generate an annual oasis grassland aboveground biomass (AGB) data set at 30‐m resolution from 1989 to 2021 based on multiple remotely sensed and ground observation data sets, and investigated the dynamics of grassland AGB under cropland expansion in oases. We found that overall oasis grassland AGB increased significantly (0.3 gm−2 yr−1, P < 0.01) during 1989–2021, but trends in AGB were not consistent across basins. In the Yellow River, Turpan Hami, Qaidam, and southern Altai Mountains River Basins, AGB was dominated by a significant increase. Conversely, in all basins in southern Xinjiang, AGB showed a decreasing trend due to the rapid cropland expansion. Spatially, cropland expansion and AGB dynamics were strongly coupled. In regions characterized by agricultural concentration, grassland AGB benefitted from resource spillover via edge effects. However, in downstream areas or those with a low proportion of cropland, where most grasslands are distributed, the relationship between the two shifted to a trade‐off. Our study provides a scientific basis for identifying priority areas for ecological restoration and for science‐based planning of the scale of cropland in oases.

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Spatio-temporal patterns of oasis dynamics in China’s drylands between 1987 and 2017

Cited by 17 publications

References 57 publications

Water Availability in China's Oases Decreased Between 1987 and 2017

Water Availability in China's Oases Decreased Between 1987 and 2017

Research Progress of Grassland Ecosystem Structure and Stability and Inspiration for Improving Its Service Capacity in the Karst Desertification Control

Spatio‐Temporal Dynamics of Aboveground Biomass in China's Oasis Grasslands Between 1989 and 2021

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