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Influence of vapor pressure deficit on vegetation growth in China 水汽压差对中国植被生长的影响
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-17 DOI: 10.1007/s40333-024-0077-0
Chuanhua Li, Liang Zhang, Hong Wang, Lixiao Pend, Peng Yin, Peidong Miao

Vapor pressure deficit (VPD) plays a crucial role in determining plant physiological functions and exerts a substantial influence on vegetation, second only to carbon dioxide (CO2). As a robust indicator of atmospheric water demand, VPD has implications for global water resources, and its significance extends to the structure and functioning of ecosystems. However, the influence of VPD on vegetation growth under climate change remains unclear in China. This study employed empirical equations to estimate the VPD in China from 2000 to 2020 based on meteorological reanalysis data of the Climatic Research Unit (CRU) Time-Series version 4.6 (TS4.06) and European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis 5 (ERA-5). Vegetation growth status was characterized using three vegetation indices, namely gross primary productivity (GPP), leaf area index (LAI), and near-infrared reflectance of vegetation (NIRv). The spatiotemporal dynamics of VPD and vegetation indices were analyzed using the Theil-Sen median trend analysis and Mann-Kendall test. Furthermore, the influence of VPD on vegetation growth and its relative contribution were assessed using a multiple linear regression model. The results indicated an overall negative correlation between VPD and vegetation indices. Three VPD intervals for the correlations between VPD and vegetation indices were identified: a significant positive correlation at VPD below 4.820 hPa, a significant negative correlation at VPD within 4.820–9.000 hPa, and a notable weakening of negative correlation at VPD above 9.000 hPa. VPD exhibited a pronounced negative impact on vegetation growth, surpassing those of temperature, precipitation, and solar radiation in absolute magnitude. CO2 contributed most positively to vegetation growth, with VPD offsetting approximately 30.00% of the positive effect of CO2. As the rise of VPD decelerated, its relative contribution to vegetation growth diminished. Additionally, the intensification of spatial variations in temperature and precipitation accentuated the spatial heterogeneity in the impact of VPD on vegetation growth in China. This research provides a theoretical foundation for addressing climate change in China, especially regarding the challenges posed by increasing VPD.

蒸气压差(VPD)在决定植物生理功能方面起着至关重要的作用,对植被的影响仅次于二氧化碳(CO2)。作为大气需水量的可靠指标,VPD 对全球水资源具有重要影响,其意义还延伸到生态系统的结构和功能。然而,在中国,VPD 对气候变化下植被生长的影响尚不明确。本研究基于气候研究单位(CRU)时间序列 4.6 版(TS4.06)和欧洲中期天气预报中心(ECMWF)再分析 5(ERA-5)的气象再分析数据,采用经验方程估算了中国 2000 至 2020 年的 VPD。植被生长状况通过三个植被指数来描述,即总初级生产力(GPP)、叶面积指数(LAI)和植被近红外反射率(NIRv)。利用 Theil-Sen 中位趋势分析和 Mann-Kendall 检验分析了 VPD 和植被指数的时空动态。此外,还利用多元线性回归模型评估了 VPD 对植被生长的影响及其相对贡献。结果表明,VPD 与植被指数之间总体呈负相关。VPD与植被指数之间的相关性有三个VPD区间:VPD低于4.820 hPa时呈显著正相关,VPD在4.820-9.000 hPa范围内呈显著负相关,VPD高于9.000 hPa时负相关明显减弱。VPD对植被生长有明显的负面影响,其绝对值超过了温度、降水和太阳辐射。二氧化碳对植被生长的积极影响最大,VPD 抵消了二氧化碳约 30.00% 的积极影响。随着 VPD 上升速度的减慢,其对植被生长的相对贡献也在减小。此外,气温和降水的空间变化加剧,加剧了 VPD 对中国植被生长影响的空间异质性。这项研究为中国应对气候变化,尤其是应对VPD上升带来的挑战提供了理论依据。
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引用次数: 0
Grain size and surface micro-texture characteristics and their paleoenvironmental significance of Holocene sediment in southern margin of the Gurbantunggut Desert, China 中国古尔班通古特沙漠南缘全新世沉积物的粒度和表面微纹理特征及其古环境意义
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-01 DOI: 10.1007/s40333-024-0015-1
Yunqiang Ma, Zhizhong Li, Dianjia Tan, Xiaojun Zou, Tonglian Tao
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引用次数: 0
Effects of desert plant communities on soil enzyme activities and soil organic carbon in the proluvial fan in the eastern foothills of the Helan Mountain in Ningxia, China 荒漠植物群落对宁夏贺兰山东麓冲积扇土壤酶活性和土壤有机碳的影响
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-01 DOI: 10.1007/s40333-024-0076-1
Aihong Shen, Yun Shi, Wenbao Mi, Shaoli Yue, Jie She, Fenghong Zhang, Rui Guo, Hongyuan He, Tao Wu, Hongxia Li, Na Zhao
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引用次数: 0
Landscape ecological risk assessment and its driving factors in the Weihe River basin, China 中国渭河流域景观生态风险评估及其驱动因素
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-01 DOI: 10.1007/s40333-024-0013-3
Sen Chang, Yaqi Wei, Zhen-Zhong Dai, Wen Xu, Xing Wang, Jia-jia Duan, Liang Zou, Guorong Zhao, Xiaoying Ren, Yongzhong Feng
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引用次数: 0
Host plant traits play a crucial role in shaping the composition of epiphytic microbiota in the arid desert, Northwest China 寄主植物性状对中国西北干旱荒漠中附生微生物群组成的形成起着至关重要的作用
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-01 DOI: 10.1007/s40333-024-0014-2
Jun Zhang, Yuanming Zhang, Q. Zhang
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引用次数: 0
Utilizing sediment grain size characteristics to assess the effectiveness of clay–sand barriers in reducing aeolian erosion in Minqin desert area, China 利用沉积物粒度特征评估粘土-砂屏障在减少中国民勤沙漠地区风化侵蚀方面的效果
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-01 DOI: 10.1007/s40333-024-0075-2
Dacheng Song, Wenzhi Zhao, Guang Li, Lemin Wei, Lide Wang, Jingyi Yang, Hao Wu, Quanlin Ma
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引用次数: 0
Grassland-type ecosystem stability in China differs under the influence of drought and wet events 干旱和湿润事件影响下中国草地生态系统稳定性的差异
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-01 DOI: 10.1007/s40333-024-0098-8
Wenyu Cao, Jianjun Bai, Leshan Yu
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引用次数: 0
Environmental dynamics of nitrogen and phosphorus release from river sediments of arid areas 干旱地区河流沉积物氮磷释放的环境动态
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-01 DOI: 10.1007/s40333-024-0099-7
Wenhao Su, Chengcheng Wu, Xuanxuan Sun, Rongrong Lei, Li Lei, Ling Wang, Xinping Zhu
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引用次数: 0
Near-surface wind field characteristics of the desert-oasis transition zone in Dunhuang, China 中国敦煌沙漠-绿洲过渡带的近地表风场特征
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-05-01 DOI: 10.1007/s40333-024-0056-5
Jiapeng Pan, Kecun Zhang, Z. An, Yu Zhang
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引用次数: 0
Effects of wind speed, underlying surface, and seed morphological traits on the secondary seed dispersal in the Tengger Desert, China 风速、下垫面和种子形态特征对中国腾格里沙漠种子二次扩散的影响
IF 3 3区 环境科学与生态学 Q2 Earth and Planetary Sciences Pub Date : 2024-04-04 DOI: 10.1007/s40333-024-0057-4
Wenjie Qu, Wenzhi Zhao, Xinguo Yang, Lei Wang, Xue Zhang, Jianjun Qu

The maintenance of sand-fixing vegetation is important for the stability of artificial sand-fixing systems in which seed dispersal plays a key role. Based on field wind tunnel experiments using 11 common plant species on the southeastern edge of the Tengger Desert, China, we studied the secondary seed dispersal in the fixed and semi-fixed sand dunes as well as in the mobile dunes in order to understand the limitations of vegetation regeneration and the maintenance of its stability. Our results indicated that there were significant variations among the selected 11 plant species in the threshold of wind speed (TWS). The TWS of Caragana korshinskii was the highest among the 11 plant species, whereas that of Echinops gmelinii was the lowest. Seed morphological traits and underlying surface could generally explain the TWS. During the secondary seed dispersal processes, the proportions of seeds that did not disperse (no dispersal) and only dispersed over short distance (short-distance dispersal within the wind tunnel test section) were significantly higher than those of seeds that were buried (including lost seeds) and dispersed over long distance (long-distance dispersal beyond the wind tunnel test section). Compared with other habitats, the mobile dunes were the most difficult places for secondary seed dispersal. Buried seeds were the easiest to be found in the semi-fixed sand dunes, whereas fixed sand dunes were the best sites for seeds that dispersed over long distance. The results of linear mixed models showed that after controlling the dispersal distance, smaller and rounder seeds dispersed farther. Shape index and wind speed were the two significant influencing factors on the burial of seeds. The explanatory power of wind speed, underlying surface, and seed morphological traits on the seeds that did not disperse and dispersed over short distance was far greater than that on the seeds that were buried and dispersed over long distance, implying that the processes and mechanisms of burial and long-distance dispersal are more complex. In summary, most seeds in the study area either did not move, were buried, or dispersed over short distance, promoting local vegetation regeneration.

固沙植被的维持对人工固沙系统的稳定性非常重要,而种子的扩散在人工固沙系统中起着关键作用。基于在中国腾格里沙漠东南边缘利用 11 种常见植物进行的野外风洞实验,我们研究了固定沙丘、半固定沙丘和流动沙丘中种子的二次扩散,以了解植被再生及其稳定性维持的限制因素。结果表明,所选的 11 种植物在风速阈值(TWS)方面存在显著差异。在 11 种植物中,Caragana korshinskii 的风速阈值最高,而 Echinops gmelinii 的风速阈值最低。种子形态特征和底面一般可以解释种子的扩散速度。在种子的二次扩散过程中,未扩散(无扩散)和仅短距离扩散(风洞试验段内的短距离扩散)的种子比例明显高于被埋藏(包括丢失种子)和长距离扩散(风洞试验段外的长距离扩散)的种子比例。与其他生境相比,流动沙丘是种子二次扩散最困难的地方。埋藏的种子最容易在半固定沙丘中找到,而固定沙丘则是种子远距离扩散的最佳地点。线性混合模型的结果表明,在控制传播距离后,较小和较圆的种子传播得更远。形状指数和风速是影响种子埋藏的两个重要因素。风速、底面和种子形态特征对未扩散和短距离扩散的种子的解释力远远大于对被埋藏和长距离扩散的种子的解释力,这意味着埋藏和长距离扩散的过程和机制更为复杂。总之,研究区域的大多数种子要么没有移动,要么被埋藏,要么短距离扩散,促进了当地植被的再生。
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引用次数: 0
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Journal of Arid Land
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