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Coarse woody debris features of a warm temperate deciduous broad-leaved forest,northern China

Journal of Forestry Research 2021年第3期32卷 1105-1114页

作者： Fang Ma liwen zhuang Shunzhong Wang Weiguo Sang Minzu University of China No.27Zhongguancun NandajieHaidian DistrictBeijing 100081People’s Republic of China Heilongjiang Academy of Forestry Science No 134 Haping RoadNangang DistrictHarbin 150081People’s Republic of China Key Lab of Environment and Vegetation Change Institute of BotanyChinese Academy of SciencesNo.20 Xiangshan NanxincunHaidian DistrictBeijing 100093People’s Republic of China

Stocking and structural composition of a deciduous broad-leaved forest were determined to predict coarse woody debris quantity by quantifying the empirical relationships between these two *** most ecologically significant families by stem density were Salicaceae,Betulaceae,Fagaceae,and Aceraceae.P opulus davidiana was the most dominant species followed by B etula dahurica,Quercus mongolica,and Acer *** four species accounted for 69.5%of total *** small-diameter species characterized the coarse woody debris showing a reversed J-shaped *** coarse debris of ***,***,and *** mainly comprised the 10–20 cm size class,whereas *** debris was mainly in the 5–10 cm size *** spatial patterns of different size classes of coarse woody debris were analyzed using the g-function to determine the size of the tree at its *** results indicate that the spatial patterns at the 0–50 m scale shifted gradually from an aggregated to a random *** some species,the larger coarse debris might change from an aggregated to a random distribution more *** the importance of coarse woody debris in forest ecosystems,its composition and patterns can improve understanding of community structure and *** aggregation pattern might be due to density dependence and self-thinning effects,as well as by succession and *** four dominant species across the different size classes showed distinct aggregated distribution features at different spatial *** suggests a correlation between the dominant species population,size class,and aggregated distribution of coarse woody debris.

关键词： Tree mortality Diversity Size class Forest dynamic plot

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Different radial growth responses to climate warming by two dominant tree species at their upper altitudinal limit on Changbai Mountain

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Journal of Forestry Research 2017年第4期28卷 795-804页

作者： liwen zhuang Jan C. Axmacher Weiguo Sang Heilongjiang Forestry Academy of Sciences Harbin 150040People’s Republic of China UCL Department of Geography University College LondonPearson BuildingGower StreetLondon WC1E 6BTUK Minzu University of China Beijing 100081People’s Republic of China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093People’s Republic of China

We analyzed the influence of climate change over the past 50 years on the radial growth of two tree species: Korean pine (Pinus koraiensis) and Yezo spruce (Picea jezoensis), located on Changbai Mountain, Northeast China, using a dendrochronology approach to understand factors that limit the altitude for tree species. Elevated temperatures increased the radial growth of Korean pine and decreased that of Yezo spruce. The positive response of tree growth to hydrothermal conditions was the key reason that the upper limit of elevation of Korean pine followed the temperature fluctuation pattern. Increased temperatures and precipitation and longer growing seasons accelerated Korean pine growth. As the temperature increased, correlations between Korean pine ring-width chronology and precipitation changed from negative to positive. In Yezo spruce, increasing monthly temperatures and inadequate precipitation during the middle and late parts of the growing season led to narrow growth rings, whereas decreasing monthly temperatures and sufficient precipitation during the late growing season promoted growth. Rising temperatures and adequate precipitation increases Korean pine growth, possibly elevating the upper range limit in altitude for this species. In contrast, Yezo spruce growth is negatively affected by warming temperatures and limited precipitation. Under future temperature increases and precipitation fluctuations, the upper limit altitude of Korean pine can reasonably be expected to shift upward and Yezo spruce downward.

关键词： Climate change Picea jezoensis Pinus koraiensis Tree-ring Upper altitudinal limit

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State Forest Administration and Management System Reform in Austria and Germany and Experiences for China Reference

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Chinese Forestry Science and Technology 2009年第1期8卷 41-46页

作者： ZHANG Zhida FU liwen zhuang Zuofeng Natural Forest Protection Center,State Forestry Administration,Beiiing 100714,P.R.China

Austria and Germany,the two forest developed countries,have drawn a lot of experiences in forest *** article summarizes the successful experiences of forest management reform in those two counties and puts forward pol... 详细信息

关键词： state forest administration experiences

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价值转移模型在森林类保护区生态系统服务功能评估中的应用

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东北林业大学学报 2020年第12期48卷 52-57页

作者：舒航庄立文孙晓杰邢一明桑卫国中央民族大学生命与环境科学学院北京100081 黑龙江省林业科学研究院太原师范学院中央民族大学中国科学院植物研究所

收集与中国国家级森林类型自然保护区生态系统服务价值评估相关的文献,应用Meta分析(荟萃分析或元分析)的方法,建立相关的价值转移数据库和Meta分析价值转移模型;分析价值评估的影响因素,检验模型样本外价值转移的有效性,探讨Meta价值... 详细信息

收集与中国国家级森林类型自然保护区生态系统服务价值评估相关的文献,应用Meta分析(荟萃分析或元分析)的方法,建立相关的价值转移数据库和Meta分析价值转移模型;分析价值评估的影响因素,检验模型样本外价值转移的有效性,探讨Meta价值转移方法在中国国家级森林类型自然保护区生态系统服务价值评估的应用。结果表明:①在中国国家级森林类型自然保护区中,单位面积提供的保护生物多样性和休闲游憩的生态系统服务经济价值最高,净化空气的生态系统服务经济价值最低;②保护区生态系统服务的类型及其所处的植被分区,会极显著地影响我国国家级森林类型自然保护区生态系统服务价值的变化;③Meta回归模型的有效性检验结果表明,模型可作为一种快速且有效的方法用于样本外价值转移。

关键词：自然保护区森林生态系统生态系统服务价值价值转移模型

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大型海藻中环二肽类抑藻活性化合物的分离纯化

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海洋通报 2022年第6期41卷 703-712页

作者：庄丽雯周文静毛奕淋郭赣林王长海孙颖颖江苏海洋大学江苏省海洋生物技术重点实验室江苏连云港222005 江苏海洋大学江苏省海洋生物产业技术协同创新中心江苏连云港222005 江苏海洋大学江苏省海洋生物资源与生态环境重点实验室江苏连云港222005 南京农业大学资源与环境科学学院江苏南京210095

采用茚三酮试剂显色的薄层原位化学反应和抑藻活性检测方法,从龙须菜、条斑紫菜、鹿角藻和裙带菜中筛选环肽,发现龙须菜和条斑紫菜中存在具有抑藻活性的环肽。以龙须菜和条斑紫菜粉末为原料,采用硅胶柱层析和(或)硅胶薄层层析制备等方法... 详细信息

采用茚三酮试剂显色的薄层原位化学反应和抑藻活性检测方法,从龙须菜、条斑紫菜、鹿角藻和裙带菜中筛选环肽,发现龙须菜和条斑紫菜中存在具有抑藻活性的环肽。以龙须菜和条斑紫菜粉末为原料,采用硅胶柱层析和(或)硅胶薄层层析制备等方法,从龙须菜中分离到环(脯氨酸-甘氨酸)、环(丝氨酸-脯氨酸)和环(丙氨酸-色氨酸),从条斑紫菜中纯化到环(亮氨酸-脯氨酸)和环(缬氨酸-酪氨酸)。除环(丝氨酸-脯氨酸)外,其余4种环二肽均是首次从相应大型海藻中获得。环(脯氨酸-甘氨酸)、环(亮氨酸-脯氨酸)和环(缬氨酸-酪氨酸)明显抑制了强壮前沟藻、赤潮异弯藻和球形棕囊藻的生长,对米氏凯伦藻和中肋骨条藻有选择性抑制作用。在50μg/mL浓度时,3种环二肽对强壮前沟藻、赤潮异弯藻和球形棕囊藻的生长抑制率≥50%(第4天);环(脯氨酸-甘氨酸)对米氏凯伦藻以及环(亮氨酸-脯氨酸)对中肋骨条藻的生长抑制率超过或接近50%。随后,获得环二肽对赤潮微藻生长的半抑制效应浓度EC_(50-96h)。结果表明:环(脯氨酸-甘氨酸)、环(亮氨酸-脯氨酸)和环(缬氨酸-酪氨酸)在抑制米氏凯伦藻、球形棕囊藻或赤潮异弯藻方面比重铬酸钾更有优势,有望开发为环境友好型赤潮微藻抑藻剂。

关键词：龙须菜条斑紫菜抑藻活性环二肽分离纯化

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海带中抑藻活性化合物的分离及抑藻活性分析

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海洋学报 2022年第2期44卷 143-154页

作者：孙颖颖朱文轩周静庄丽雯毛奕淋赵秀芳王长海江苏海洋大学江苏省海洋生物技术重点实验室江苏连云港222005 江苏海洋大学江苏省海洋生物产业技术协同创新中心江苏连云港222005 江苏省海洋资源开发研究院江苏连云港222000 连云港市质量技术综合检验检测中心江苏连云港222005 南京农业大学资源与环境科学学院江苏南京210095

以2 000 g海带为原料、米氏凯伦藻为测试微藻,采用甲醇浸提、液液萃取、硅胶柱层析、Sephadax LH-20凝胶柱层析和硅胶薄层层析等分离方法,纯化可能具有抑藻活性的化合物,制备到5个薄层纯样品,B21(1.39 g)、B131(0.51 g)、B132(0.48 g)、... 详细信息

以2 000 g海带为原料、米氏凯伦藻为测试微藻,采用甲醇浸提、液液萃取、硅胶柱层析、Sephadax LH-20凝胶柱层析和硅胶薄层层析等分离方法,纯化可能具有抑藻活性的化合物,制备到5个薄层纯样品,B21(1.39 g)、B131(0.51 g)、B132(0.48 g)、C211(0.016 g)和C212(0.020 g)。经鉴定,B21、B_(131)、B_(132)、C_(211)和C_(212)依次为7-羟基庚酸、十四酸、十六酸、十八酸和油酸,均是第一次从海带中分离获得。此5种脂肪酸对塔玛亚历山大藻、强壮前沟藻、赤潮异弯藻、米氏凯伦藻、球形棕囊藻和中肋骨条藻的生长表现出选择性抑制作用,其中7-羟基庚酸具有较为广泛的抑藻活性。除塔玛亚力山大藻之外,在浓度为50μg/mL时,7-羟基庚酸对其他5种赤潮微藻生长的抑制作用与硫酸铜和重铬酸钾对它们生长的抑制作用接近,生长抑制率超过71%(第4天);十四酸在浓度为50μg/mL时对强壮前沟藻、米氏凯伦藻和中肋骨条藻生长也有明显的抑制作用,第4天时对它们的生长抑制率在57%以上。在此基础上,第一次确定了7-羟基庚酸、十四酸、十六酸和十八酸对强壮前沟藻、赤潮异弯藻、米氏凯伦藻、球形棕囊藻和中肋骨条藻生长的半抑制效应浓度(EC;),7-羟基庚酸对塔玛亚历山大藻生长的EC;也是第一次被确定。与硫酸铜和重铬酸钾对每种赤潮微藻生长的EC;比较,7-羟基庚酸和十四酸在抑制强壮前沟藻上具有明显的抑藻优势。

关键词：抑藻活性化合物分离海带纯化赤潮微藻

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Lipid droplets in the nervous system:involvement in cell metabolic homeostasis

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Neural Regeneration Research 2025年第3期20卷 740-750页

作者： Yuchen Zhang Yiqing Chen Cheng zhuang Jingxuan Qi Robert Chunhua Zhao Jiao Wang School of Life Sciences Shanghai UniversityShanghaiChina School of Medicine Shanghai UniversityShanghaiChina Institute of Basic Medical Sciences Chinese Academy of Medical Sciences School of Basic MedicinePeking Union Medical CollegeBeijingChina Center of Excellence in Tissue Engineering Chinese Academy of Medical SciencesBeijingChina Beijing Key Laboratory of New Drug Development and Clinical Trial of Stem Cell Therapy BeijingChina

Lipid droplets serve as primary storage organelles for neutral lipids in neurons,glial cells,and other cells in the nervous *** droplet formation begins with the synthesis of neutral lipids in the endoplasmic ***,lipid droplets were recognized for their role in maintaining lipid metabolism and energy homeostasis;however,recent research has shown that lipid droplets are highly adaptive organelles with diverse functions in the nervous *** addition to their role in regulating cell metabolism,lipid droplets play a protective role in various cellular stress ***,lipid droplets exhibit specific functions in neurons and glial *** of lipid droplet formation leads to cellular dysfunction,metabolic abnormalities,and nervous system *** review aims to provide an overview of the role of lipid droplets in the nervous system,covering topics such as biogenesis,cellular specificity,and ***,it will explore the association between lipid droplets and neurodegenerative *** the involvement of lipid droplets in cell metabolic homeostasis related to the nervous system is crucial to determine the underlying causes and in exploring potential therapeutic approaches for these diseases.

关键词： Alzheimer's disease lipid droplet biogenesis lipid droplets lipid metabolism nervous system neurodegenerative disorders oxidative stress Parkinson's disease

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Bidirectional regulation of the brain-gut-microbiota axis following traumatic brain injury

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Neural Regeneration Research 2025年第8期20卷 2153-2168页

作者： Xinyu You Lin Niu Jiafeng Fu Shining Ge Jiangwei Shi Yanjun Zhang Pengwei zhuang National Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjinChina Haihe Laboratory of Modern Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjinChina First Teaching Hospital of Tianjin University of Traditional Chinese Medicine TianjinChina National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion TianjinChina

Traumatic brain injury is a prevalent disorder of the central nervous *** addition to primary brain parenchymal damage,the enduring biological consequences of traumatic brain injury pose long-term risks for patients with traumatic brain injury;however,the underlying pathogenesis remains unclear,and effective intervention methods are *** dysfunction is a significant consequence of traumatic brain *** the most densely innervated peripheral tissue in the body,the gut possesses multiple pathways for the establishment of a bidirectional“brain-gut axis”with the central nervous *** gut harbors a vast microbial community,and alterations of the gut niche contribute to the progression of traumatic brain injury and its unfavorable prognosis through neuronal,hormonal,and immune pathways.A comprehensive understanding of microbiota-mediated peripheral neuroimmunomodulation mechanisms is needed to enhance treatment strategies for traumatic brain injury and its associated *** comprehensively reviewed alterations in the gut microecological environment following traumatic brain injury,with a specific focus on the complex biological processes of peripheral nerves,immunity,and microbes triggered by traumatic brain injury,encompassing autonomic dysfunction,neuroendocrine disturbances,peripheral immunosuppression,increased intestinal barrier permeability,compromised responses of sensory nerves to microorganisms,and potential effector nuclei in the central nervous system influenced by gut ***,we reviewed the mechanisms underlying secondary biological injury and the dynamic pathological responses that occur following injury to enhance our current understanding of how peripheral pathways impact the outcome of patients with traumatic brain *** review aimed to propose a conceptual model for future risk assessment of central nervous system-related diseases while elucidating novel insights into the bidirectional effec

关键词： traumatic brain injury brain-gut-microbiome axis gut microbiota neuroimmune immunosuppression host defense vagal afferents bacterial infection dorsal root ganglia nociception neural circuitry

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大型海藻代谢产物对赤潮微藻的抑藻活性分析

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环境科学与技术 2021年第2期44卷 9-18页

作者：孙颖颖张乃胜毛奕淋龙正康庄丽雯赵秀芳王长海江苏海洋大学江苏省海洋生物技术重点实验室江苏连云港222005 江苏海洋大学江苏省海洋生物产业技术协同创新中心江苏连云港222005 江苏海洋大学江苏省海洋生物资源与生态环境重点实验室江苏连云港222005 南京农业大学资源与环境科学学院江苏南京210095

该文分析了亚油酸、单棕榈酸甘油酯、α-细辛脑、海藻糖、二十二碳酸甲酯和异植醇对强壮前沟藻、赤潮异弯藻、米氏凯伦藻、球形棕囊藻、东海原甲藻和中肋骨条藻生长的影响。在此基础上,通过测定藻细胞内SOD、GSH和抗超氧阴离子等活性以... 详细信息

该文分析了亚油酸、单棕榈酸甘油酯、α-细辛脑、海藻糖、二十二碳酸甲酯和异植醇对强壮前沟藻、赤潮异弯藻、米氏凯伦藻、球形棕囊藻、东海原甲藻和中肋骨条藻生长的影响。在此基础上,通过测定藻细胞内SOD、GSH和抗超氧阴离子等活性以及丙二醛含量和藻胆蛋白相对含量和相对比例等生理生化指标,研究它们对赤潮微藻生长的抑藻活性。结果表明,海藻糖显著抑制了米氏凯伦藻和中肋骨条藻的生长,其余5种化合物对4种(或5种)赤潮微藻的生长表现出明显的抑制作用。比较此6种化合物和重铬酸钾对赤潮微藻生长的半抑制效应浓度,发现在抑制某种或某些赤潮微藻生长上,5种化合物(除二十二碳酸甲酯)表现出比重铬酸钾更为明显的优势。α-细辛脑和异植醇明显改变了藻细胞抗氧化酶SOD和/或GSH和/或抗超氧阴离子活性,破坏了抗氧化酶防御系统,进而导致膜脂质过氧化,致使MDA含量明显增加。藻胆蛋白各组分相对含量和相对比例发生明显变化,可能致使光合作用受到影响,从而干扰了赤潮微藻细胞的新陈代谢过程,最终导致藻细胞生长受到抑制。

关键词：抑藻活性生长抑制作用大型海藻赤潮微藻代谢产物

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Drosophila models used to simulate human ATP1A1 gene mutations that cause Charcot-Marie-Tooth type 2 disease and refractory seizures

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Neural Regeneration Research 2025年第1期20卷 265-276页

作者： Yao Yuan Lingqi Yu Xudong zhuang Dongjing Wen Jin He Jingmei Hong Jiayu Xie Shengan Ling Xiaoyue Du Wenfeng Chen Xinrui Wang Institute of Life Sciences College of Biological Science and EngineeringFuzhou UniversityFuzhouFujian ProvinceChina NHC Key Laboratory of Technical Evaluation of Fertility Regulation for Non-human Primate(Fujian Maternity and Child Health Hospital) FuzhouFujian ProvinceChina Medical Research Center Fujian Maternity and Child Health HospitalCollege of Clinical Medicine for Obstetrics&Gynecology and PediatricsFujian Medical UniversityFuzhouFujian ProvinceChina Department of Neurology and Institute of Neurology of The First Affiliated Hospital Institute of Neuroscienceand Fujian Key Laboratory of Molecular NeurologyFujian Medical UniversityFuzhouFujian ProvinceChina

Certain amino acids changes in the human Na^(+)/K^(+)-ATPase pump,ATPase Na^(+)/K^(+)transporting subunit alpha 1(ATP1A1),cause Charcot-Marie-Tooth disease type 2(CMT2)disease and refractory *** develop in vivo models to study the role of Na^(+)/K^(+)-ATPase in these diseases,we modified the Drosophila gene homolog,Atpα,to mimic the human ATP1A1 gene mutations that cause *** located within the helical linker region of human ATP1A1(I592T,A597T,P600T,and D601F)were simultaneously introduced into endogenous Drosophila Atpαby CRISPR/Cas9-mediated genome editing,generating the Atpα^(TTTF)*** addition,the same strategy was used to generate the corresponding single point mutations in flies(Atpα^(I571T),Atpα^(A576T),Atpα^(P579T),and Atpα^(D580F)).Moreover,a deletion mutation(Atpα^(mut))that causes premature termination of translation was generated as a positive *** these alleles,we found two that could be maintained as homozygotes(Atpα^(I571T)and Atpα^(P579T)).Three alleles(Atpα^(A576T),Atpα^(P579)and Atpα^(D580F))can form heterozygotes with the Atpαmut *** found that the Atpαallele carrying these CMT2-associated mutations showed differential phenotypes in *** heterozygous for Atpα^(TTTF)mutations have motor performance defects,a reduced lifespan,seizures,and an abnormal neuronal *** Drosophila models will provide a new platform for studying the function and regulation of the sodium-potassium pump.

关键词： ATP1A1 Atpα bang-sensitive paralysis Charcot-Marie-Tooth disease type 2 CRISPR/Cas9 homology-directed repair Na^(+)/K^(+)-ATPase point mutation seizures sodium pump

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