Acta Scientiarum Naturalium Universitatis SunYatseni
- 主编：HU Jianxun
- ISSN:2097-0137
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Characteristics of carotenoid components in juice sacs of pomelo （
Citrus grandis cv ‘Guanximiyou’） 4626 - 0 2 An Efficient and Deterministic Algorithm to Determine Irreducible and Primitive Polynomials over Finite Fields 4571
- 0 3 Comparative Analysis of Parameter Estimation Methodsof Generalized Extreme Value Distribution 3814
- 0 4 A Highly Efficient Protocol for Transformation of Saccharomyces cerevisiae and Pichia pastoris by Electroporation 3717
- 0 5 Analysis of Physical Characteristics, Composition of Tephrosia vogelii Hook f.Seeds and its Oil Component 3357
- 0 6 Delay-dependent Robust H∞ Control for Uncertain Fuzzy Systems with Delay 3186
- 0 7 Research on Matrix Standardized Method for Resource Scheduling 3152
- 0 8 Video Content Authentication Technique Based on Cloud Watermark 2938
- 0 9 Vector Construction and Prokaryotic Expressing of OsRad21-i,a Novel Gene Coding Sister Chromatid Protein ofHybrid Indica Rice (Oryza Sativa.ssp.indica) 2932
- 10 Liuxihe Model I: Theory and Methods 2793
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2026年第65卷第2期
Column of land use and ecological evolution in Xinjiang
摘要：To support the "Dual Carbon" goals under global change， elucidating the spatiotemporal dynamics and driving mechanisms of carbon storage in arid mountain-oasis-desert systems is crucial for achieving regional carbon balance and sustainable development. This study applied the InVEST model to estimate carbon storage from 1990 to 2020 in the north slope of the Tianshan Mountain. By integrating mountain-descent gradient analysis and bivariate spatial autocorrelation， we systematically revealed its spatiotemporal patterns and the linkage with the gradient. The optimal parameter-based geographical detector was then used to investigate the driving factors. The results indicate that： 1） Temporally， carbon storage decreased initially and then increased， with a net gain of 4.06×107 t since 2000， primarily attributed to the conversion of unused land to cropland and grassland. Spatially， it showed a belt-shaped decreasing pattern along the gradient. 2） Carbon storage was positively correlated with the gradient. Areal carbon density followed a "stable-then-sharp increase" pattern with increasing elevation， reflecting a dynamic equilibrium between human activities and natural constraints along the topographic gradient. 3） The driving mechanisms exhibited spatial heterogeneity： dominated by anthropogenic factors at low gradients， by human-land interaction at medium gradients， and by natural controls at high gradients. Temporally， the dominant drivers shifted from socioeconomic factors to land-use intensity， and finally to a dual synergy between socioeconomic activity and nighttime light intensity， indicating a regional transition toward more refined spatial governance. This study enhances the theoretical understanding of human-land coupling in mountain-oasis-desert systems and provides a scientific basis for territorial spatial optimization and carbon sequestration enhancement in arid regions.关键词：the north slope of Tianshan Mountain;carbon storage;InVEST model;mountain basin gradient effect;optimal parameter geographical detector392|645|0更新时间：2026-03-18- 摘要：Amid escalating synergistic pressures on population， land， and food resources， elucidating the adaptive evolution of the human-land-food nexus is crucial for regional sustainable development. Utilizing data on population， arable land， and grain in Xinjiang from 2000 to 2020， this study applied an adaptability quantification model， a four-quadrant model， a Markov transition matrix， and an obstacle degree model to reveal its spatiotemporal evolution and coordination mechanisms. The results show that： 1）From 2000 to 2020， the comprehensive development index of the coupled system increased from 0.157 8 to 0.218 5， with an average annual growth rate of 1.39%. The arable land and grain subsystems grew at rates of 1.99% and 1.90% per year， respectively， while the population subsystem grew at a lower rate of 0.32%. 2）System adaptability improved continuously， with the proportion of highly adaptable regions increasing from 20% to 31%， exhibiting an evolutionary pattern of “point breakthroughs to areal expansion”. 3）The proportion of regions in the first quadrant （high adaptability-high development） remained stable at 48%-56% and the Markov transition matrix showed a self-sustaining probability of 95%， indicating strong systemic stability. 4）From 2000 to 2020， the obstacle degrees of the arable land and grain subsystems declined from 45% and 43% to 40% and 25%， respectively. In contrast， the obstacle degree of the population subsystem rose from 12% to 35%， suggesting that population and arable land have gradually become the primary bottlenecks for coordinated development. This study provides a valuable reference for analyzing the human-land-food nexus in arid regions and offers insight to assist Xinjiang in optimizing population distribution and land-use structures under multiple resource constraints， thereby enhancing grain production resilience and fostering high-quality and sustainable regional development.关键词：human-land-food;four-quadrant model;adaptability;obstacle degree;Xinjiang234|469|0更新时间：2026-03-18
- 摘要：Understanding the variation characteristics of vegetation phenology and its response mechanisms to climate warming and wetting in the Ebinur Lake basin is essential for elucidating ecosystem carbon and water cycles in arid regions. Utilizing MODIS EVI time-series data from 2001 to 2021， this study extracted key vegetation phenological parameters in the Ebinur Lake Basin employing the dynamic threshold method. Partial correlation analysis and driver attribution analysis were conducted using temperature and precipitation data. The results revealed the following general trends of vegetation phenology from 2001 to 2021： the start of the growing season was delayed at a rate of 0.17 d/a， the end of the growing season was slightly delayed at 0.06 d/a， and the length of the growing season length was shortened at a rate of -0.42 d/a. However， none of these trends were statistically significant（P>0.05）. The relationships between climatic factors and vegetation phenology were complex and exhibited considerable spatial heterogeneity. In certain local areas， the start of the growing season was significantly positively correlated with both temperature and precipitation， whereas the end and length of the growing season were significantly negatively correlated with them （P<0.05）. Moreover， vegetation phenology was more sensitive to precipitation than to temperature. While climate warming and wetting served as notable driving effects on phenological variations in some local areas， non-climatic factors， such as land use patterns， irrigation and grazing activities， topography， and soil properties， etc.，had a more pronounced influence across most of the basin. These findings offer a scientific basis for promoting the sustainable and healthy development of inland lake basin ecosystems in arid regions.关键词：vegetation phenology;warming and humidification climate;climate response;spatiotemporal variation;Ebinur Lake basin232|434|0更新时间：2026-03-18
- 摘要：To investigate soil water movement under line-source drip irrigation， a study was conducted using an indoor soil tank setup with three emitters on sandy loam soil from the Emin Irrigation District in Xinjiang. The experiment included three emitter spacings （10， 20， and 30 cm） and three emitter flow rates （1.0， 1.5， and 2.0 L/h）， resulting in a total of nine treatments. The wetting front dynamics were monitored over a 6 h irrigation period. The results showed that： 1） Both the horizontal and vertical wetting front movement distances were best described by a power function of infiltration time （R²>0.98）. 2） At the same emitter spacing， higher flow rates resulted in shorter wetting front convergence times （the shortest being 1 min） and shallower vertical infiltration depths at convergence （the shallowest being 4.2 cm）. However， they led to greater final vertical infiltration depths at the end of the irrigation period （up to 39 cm）. 3） At the same emitter flow rate， larger spacings led to longer wetting front convergence times （up to 55 min） and deeper vertical infiltration at the moment of convergence （up to 11.5 cm）. However， they resulted in smaller final vertical infiltration depths at the end of irrigation （as shallow as 23.1 cm）. This study elucidates the synergistic mechanism of emitter flow rate and spacing on the wetting pattern， providing a scientific basis for optimizing drip irrigation system parameters and design in the Emin Irrigation District.关键词：sandy loam soil;line-source infiltration;moist front;interference infiltration191|496|0更新时间：2026-03-18
Research articles
摘要：The Heyuan area is located on the eastern margin of the South China Block， where large granite outcrops are prominently exposed. To investigate the stress history of the granite in this region， a series of uniaxial compression tests were conducted. The stress characteristics of the granite were analyzed based on the Kaiser effect observed in acoustic emission （AE） signals. The AE results indicate that： 1） during monotonic uniaxial compression， the AE activity can be divided into three distinct phases： a low-activity phase， a rapid growth phase）， and a burst phase； 2） in the case of incremental cyclic loading， the cumulative AE ringing counts exhibit a stepped increase； and 3） the constant-amplitude cyclic loading demonstrates a typical Kaiser effect. The G-P algorithm was employed to calculate the correlation dimension of AE ringing counts， characterizing the fractal scaling of damage evolution. The point with the minimum correlation dimension， located near the approximate Kaiser point， was identified as the critical stress point satisfying the Kaiser effect. Furthermore， the Felicity ratio derived from cyclic loading data was used to validate the Kaiser effect. Based on this analysis， the maximum historical differential stress of the granite in Heyuan was determined to be 79.1 MPa. It is inferred that the granite formed at a depth of approximately 3.9 to 6.6 km， and that block uplifts since the Cenozoic era have caused a surface rise by about 3.5 to 6.2 km in the Heyuan area. The result provides new evidence for the study of tectonic evolution in south China.关键词：acoustic emission;Kaiser effect;granite;historical stress;Heyuan212|528|0更新时间：2026-03-18
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