Three-dimensional dynamic characteristics of vegetation and its response to climatic factors in the Qilian Mountains

Ma, Yuxin; Guan, Qingyu; Sun, Yanhua; Zhang, Jun; Yang, Libin; Yang, Enqi; Li, Huichun; Du, Qinqin

doi:10.1016/j.catena.2021.105694

Cited by 74 publications

(40 citation statements)

References 101 publications

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“…The intensity of drought in the Hexi Corridor shows a trend of increasing from southeast to northwest, and the northwestern part is mainly a very dry area with the highest frequency of drought (Jiang et al, 2021; Liu et al, 2021). Conversely, the southern part of the study area, especially the Qilian Mountains, has better vegetation development and low desertification (Figure 4), which is due to the high precipitation and milder climate (Ma et al, 2022), making the oasis and Qilian Mountains in the south normal and humid zones (Jiang et al, 2021; Liu et al, 2021). And the Qilian Mountains Nature Reserve has implemented protection policies related to logging, grazing, and hunting in the reserve, so the degree of desertification is low.…”

Section: Discussionmentioning

confidence: 99%

Section: Contributions Of Climate Change and Human Activities To Dese...mentioning

confidence: 99%

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Spatial and temporal dynamics of desertification and its driving mechanism in Hexi region

Zhang

Guan

et al. 2022

Land Degrad Dev

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Investigating the spatio‐temporal patterns of desertification and its driving mechanisms is crucial for efforts to improve the ecology and environment and combat desertification. Based on meteorological and satellite remote sensing data, this paper analyzed the dynamic characteristics of desertification in the Hexi region of arid and semiarid land in Northwest China from 2000 to 2018 using a dimidiate pixel model; revealed the relationship between desertification evolution characteristics and climatic variations and anthropogenic events based on the change characteristics of net primary productivity (NPP); and then clarified the response of desertification to climatic variations and anthropogenic events using a geodetector model. Outcomes show that: (1) overall desertification in Hexi region is at a serious level, but during the study period, severe desertification decreased, mainly concentrated in the east and southwest, and non‐desertification increased, mainly near the Qilian Mountains and Shule River basin; (2) there were both spatial and temporal dynamics during the study period, with severe desertification decreasing by 11% and moderate, light, and non‐desertification increasing by 3%, 5%, and 3% respectively; (3) during 2000–2005, human activities, climate change, and their joint contribution to desertification reversal were similar, i.e., 23%, 40%, and 36%, and the former two contributed equally to desertification expansion, 38% and 41%, respectively; climate change predominated in desertification reversal in 2005–2010 and 2015–2018, while human activities predominated in desertification expansion; human activities predominated in desertification reversal and climate change predominated in desertification expansion in 2010–2015. This research can provide a theoretical basis and technical support for ecological and environmental management and sustainable socio‐economic development in arid and semiarid regions.

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Section: Discussionmentioning

confidence: 99%

Section: Contributions Of Climate Change and Human Activities To Dese...mentioning

confidence: 99%

Spatial and temporal dynamics of desertification and its driving mechanism in Hexi region

Zhang

Guan

et al. 2022

Land Degrad Dev

Self Cite

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“…Moreover, it will increase environmental humidity in forests, which may lead to the breeding and spread of diseases and pests, and further reduce forest resilience under drought events (Garcia-Carreras et al, 2010). Most previous studies generally believed that temperature and precipitation are the dominant climate factors that affect the differentiation of vegetation response to climate change (Gao et al, 2021;Gou et al, 2022;Ma et al, 2022). In this paper, we tentatively put forward the importance of potential evapotranspiration and cloud cover in future research on this process.…”

Section: Dominant Climate Factors Underlying Altitude Differentiation...mentioning

confidence: 75%

“…Previous studies showed that temperature and precipitation were the main factors driving forest change in QMNP (Liu et al，2021； Ding et al，2021；Li et al, 2022. Tree growth was mainly affected by the time lag effect of precipitation and the combination of the time lag effect and time accumulation effect of temperature (Ma et al, 2022). At the same time, drought was the most major climate disaster in the arid and semi-arid areas and inhibited primary forests growth (Liu et al, 2021;Liu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Altitudinal differentiation of forest resilience to drought in a dryland mountain

Gao

et al. 2023

Preprint

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Drought is the major climate disaster experienced by dryland mountains. However, the altitudinal differentiation of forest resilience to drought and its dominant climate factors in dryland mountains is largely unknown, which is crucial to predict whether the primary forests will collapse under future global warming. In this study, we selected the leaf area index (LAI) and the standardized precipitation evapotranspiration index (SPEI), fitted forest resilience curves based on drought intensity and recovery time, calculated the curve area to define resilience along elevation zones in Qilian Mountains from 1982 to 2020, and analysed the characteristics of resilience altitudinal differentiation and dominant factors. The results showed that the humid characteristics and trends towards humidification in forests were more significant at higher elevations. Forests in the elevation range of 2600–3900 m exhibited faster recovery rates and greater resilience to drought than those in 1700–2600 m. This altitudinal differentiation was related to precipitation non-monotonically. Meanwhile, potential evapotranspiration and cloud cover were the most important climate factors for resilience temporal changes in different altitude zones. The findings of this study confirm the importance of the altitudinal perspective in studies of the dryland mountain evolution under future global change conditions.

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“…Among the indicators, land use degree, HDI, RDI, SHDI, ecosystem resilience, and ecosystem service value were calculated based on the land use types. NDVI stability and precipitation stability were calculated based on the coefficient of variation [46].…”

Section: Es Index System Constructionmentioning

confidence: 99%

Evaluation and Prediction of Land Use Ecological Security in the Kashgar Region Based on Grid GIS

Rao

2022

Sustainability

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Predicting trends in land use/cover change (LUCC) and assessing future ecological security (ES) can help effectively balance regional ecological conservation and economic development. In this study, a land use simulation model was used to predict the spatial-temporal variation in land use in Kashgar in 2030 under three scenarios (inertial development, agricultural land protection, and forest and rangeland conservation). Subsequently, by combining the pressure–state–response model and predicted land use, the ES of the Kashgar region in 2000, 2010, and 2020 were evaluated. We found that (1) only agricultural land and built-up land in the Kashgar region increased from 2000–2020 by 4174.79 and 434.44 km2, respectively. (2) The area of the region belonging to a generally safe level or above decreased from 38.36% in 2000 to 36.89% in 2010 and then increased to 37.71% in 2020. (3) In 2030, the ES status under the three scenarios will be improved, among which the agricultural land protection scenario corresponds to the best ES status. This research is valuable for deeply understanding the interaction mechanism between LUCC and ES in typical artificial oases in arid areas of the Kashgar region and sustaining relatively stable internal structures and socioeconomic activities in the arid oasis of the Kashgar region.

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Three-dimensional dynamic characteristics of vegetation and its response to climatic factors in the Qilian Mountains

Cited by 74 publications

References 101 publications

Spatial and temporal dynamics of desertification and its driving mechanism in Hexi region

Spatial and temporal dynamics of desertification and its driving mechanism in Hexi region

Altitudinal differentiation of forest resilience to drought in a dryland mountain

Evaluation and Prediction of Land Use Ecological Security in the Kashgar Region Based on Grid GIS

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