Understanding the spatial distribution of plant species and their dynamic changes in arid areas is crucial for addressing the challenges posed by climate change.Haloxylon ammodendron shelterbelts are essential for the...Understanding the spatial distribution of plant species and their dynamic changes in arid areas is crucial for addressing the challenges posed by climate change.Haloxylon ammodendron shelterbelts are essential for the protection of plant resources and the control of desertification in Central Asia.Thus far,the potential suitable habitats of H.ammodendron in Central Asia are still uncertain in the future under global climate change conditions.This study utilised the maximum entropy(MaxEnt)model to combine the current distribution data of H.ammodendron with its growth-related data to analyze the potential distribution pattern of H.ammodendron across Central Asia.The results show that there are suitable habitats of H.ammodendron in the Aralkum Desert,northern slopes of the Tianshan Mountains,and the upstream of the Tarim River and western edge of the Taklimakan Desert in the Tarim Basin under the current climate conditions.The period from 2021 to 2040 is projected to undergo significant changes in the suitable habitat area of H.ammodendron in Central Asia,with a projected 15.0% decrease in the unsuitable habitat area.Inland areas farther from the ocean,such as the Caspian Sea and Aralkum Desert,will continue to experience a decrease in the suitable habitats of H.ammodendron.Regions exhibiting frequent fluctuations in the habitat suitability levels are primarily found along the axis stretching from Astana to Kazakhskiy Melkosopochnik in Kazakhstan.These regions can transition into suitable habitats under varying climate conditions,requiring the implementation of appropriate human intervention measures to prevent desertification.Future climate conditions are expected to cause an eastward shift in the geometric centre of the potential suitable habitats of H.ammodendron,with the extent of this shift amplifying alongside more greenhouse gas emissions.This study can provide theoretical support for the spatial configuration of H.ammodendron shelterbelts and desertification control in Central Asia,emphasising the importance of proactive measures to adapt to climate change in the future.展开更多
妊娠哺乳相关骨质疏松症(pregnancy and lactation-associated osteoporosis,PLO)是一种罕见的骨质疏松,发生在妊娠晚期或哺乳期年轻女性,容易被误诊及漏诊,严重影响妊娠哺乳期妇女身心健康,本文报告一例完整的PLO诊断、治疗以及随访,...妊娠哺乳相关骨质疏松症(pregnancy and lactation-associated osteoporosis,PLO)是一种罕见的骨质疏松,发生在妊娠晚期或哺乳期年轻女性,容易被误诊及漏诊,严重影响妊娠哺乳期妇女身心健康,本文报告一例完整的PLO诊断、治疗以及随访,同时进行相关文献复习。PLO的发病机制目前并不完全清楚,考虑与多途径介导的骨吸收增加和成骨细胞功能障碍有关。治疗上,目前仍然存在争议,可以先停止诱因(妊娠或哺乳),补充基本的钙剂及维生素D,6~12个月再次评估骨密度决定是否进一步应用双膦酸盐等抗骨质疏松治疗。展开更多
基金supported by the the Basic Frontier Project of Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences(E3500201)the Xinjiang Tianshan Talent Program(2022TSYCLJ0002)the Fundamental Research Funds for the Central Universities(ZY20240223).
文摘Understanding the spatial distribution of plant species and their dynamic changes in arid areas is crucial for addressing the challenges posed by climate change.Haloxylon ammodendron shelterbelts are essential for the protection of plant resources and the control of desertification in Central Asia.Thus far,the potential suitable habitats of H.ammodendron in Central Asia are still uncertain in the future under global climate change conditions.This study utilised the maximum entropy(MaxEnt)model to combine the current distribution data of H.ammodendron with its growth-related data to analyze the potential distribution pattern of H.ammodendron across Central Asia.The results show that there are suitable habitats of H.ammodendron in the Aralkum Desert,northern slopes of the Tianshan Mountains,and the upstream of the Tarim River and western edge of the Taklimakan Desert in the Tarim Basin under the current climate conditions.The period from 2021 to 2040 is projected to undergo significant changes in the suitable habitat area of H.ammodendron in Central Asia,with a projected 15.0% decrease in the unsuitable habitat area.Inland areas farther from the ocean,such as the Caspian Sea and Aralkum Desert,will continue to experience a decrease in the suitable habitats of H.ammodendron.Regions exhibiting frequent fluctuations in the habitat suitability levels are primarily found along the axis stretching from Astana to Kazakhskiy Melkosopochnik in Kazakhstan.These regions can transition into suitable habitats under varying climate conditions,requiring the implementation of appropriate human intervention measures to prevent desertification.Future climate conditions are expected to cause an eastward shift in the geometric centre of the potential suitable habitats of H.ammodendron,with the extent of this shift amplifying alongside more greenhouse gas emissions.This study can provide theoretical support for the spatial configuration of H.ammodendron shelterbelts and desertification control in Central Asia,emphasising the importance of proactive measures to adapt to climate change in the future.
文摘妊娠哺乳相关骨质疏松症(pregnancy and lactation-associated osteoporosis,PLO)是一种罕见的骨质疏松,发生在妊娠晚期或哺乳期年轻女性,容易被误诊及漏诊,严重影响妊娠哺乳期妇女身心健康,本文报告一例完整的PLO诊断、治疗以及随访,同时进行相关文献复习。PLO的发病机制目前并不完全清楚,考虑与多途径介导的骨吸收增加和成骨细胞功能障碍有关。治疗上,目前仍然存在争议,可以先停止诱因(妊娠或哺乳),补充基本的钙剂及维生素D,6~12个月再次评估骨密度决定是否进一步应用双膦酸盐等抗骨质疏松治疗。
