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1成人自发性脑出血处理指南——2007年更新版:美国心脏协会/美国卒中协会卒中委员会、高血压研究委员会、医疗质量和转归研究跨学科工作组指南:美国神经病学学会确认本指南作为神经科医生教学工具的价值显示文摘目的:本指南旨在为急性自发性脑出血的诊断和治疗提供最新的综合性推荐意见。方法:通过Medline正式检索截止2006年8月的相关文献,并将撰写委员会已知相关问题的其他论文作为补充,用证据表合并资料。采用美国心脏协会卒中委员会的证据水平分级标准对每项推荐意见进行分级。由5位同行评议专家和卒中委员会领导委员会成员对指南草案进行发表前审阅。预期本指南在3年内完全更新。结果:本文陈述了脑出血的诊断、动脉血压和颅内压增高的处理、脑出血内科并发症的治疗以及复发性脑出血的预防等方面的循证指南。对重组Ⅶ因子延缓早期出血的近期试验进行了讨论。对自发性脑出血治疗的各种外科手术方法提出了推荐意见。最后,对脑出血患者的撤销治疗和临终问题进行了分析。Joseph Broderick Sander Connolly Edward Feldmann Daniel Hanley Carlos Kase Derk Krieger Marc Mayberg Lewis Morgenstern Christopher S. Ogilvy Paul Vespa Mario Zuccarello 王玉洁(译) 刘娟(译) 白璇(译) 李新辉 孙虹(译) 姚志成(译) 张慧(译) 牛英翔(译) 2007国际脑血管病杂志2007,15,7:234
2自发性脑出血治疗指南美国心脏协会/美国卒中协会对医疗卫生专业人员发布的指南显示文摘目的本指南旨在为急性自发性脑出血的诊断和治疗提供最新的综合性推荐意见。方法通过Medline进行规范的文献检索,利用证据表合并资料。撰写委员会成员通过远程电信会议讨论根据资料得出的推荐意见。采用美国心脏协会卒中委员会的证据分级方案对推荐意见进行分级。由6位同行评议专家以及卒中委员会科学声明监督委员会和卒中委员会领导委员会成员对指南的草案进行发表前审阅。预期本指南在3年内完全更新。结果本文为脑出血患者的医疗诊治提供了循证指南。重点包括诊断、止血、血压管理、院内管理和护理、预防内科合并症、外科治疗、转归预测、康复、预防复发以及将来需要考虑的问题。结论脑出血是一种严重的疾病,早期积极救治可影响其转归。本指南为脑出血患者的目标导向治疗提供了一个框架。Lewis B. Morgenstem J. Claude Hemphill Ⅲ Craig Anderson Kyra Becker Joseph P. Broderick E. Sander Connolly Jr Steven M. Greenberg James N. Huang R. Loch Macdonald Steven R. Messe Pamela H. Mitchell Magdy Selim Rafael J. Tamargo 王玉洁(译) 王健(译) 刘相玉(译) 谢丽丽(译) 2010国际脑血管病杂志2010,,8:259
3Wnt/b-catenin signaling plays an ever-expanding role in stem cell self-renewal,tumorigenesis and cancer chemoresistance显示文摘Wnt signaling transduces evolutionarily conserved pathways which play important roles in initiating and regulating a diverse range of cellular activities,including cell proliferation,calcium homeostasis,and cell polarity.The role of Wnt signaling in controlling cell proliferation and stem cell self-renewal is primarily carried out through the canonical pathway,which is the best-characterized the multiple Wnt signaling branches.The past 10 years has seen a rapid expansion in our understanding of the complexity of this pathway,as many new components of Wnt signaling have been identified and linked to signaling regulation,stem cell functions,and adult tissue homeostasis.Additionally,a substantial body of evidence links Wnt signaling to tumorigenesis of cancer types and implicates it in the development of cancer drug resistance.Thus,a better understanding of the mechanisms by which dysregulation of Wnt signaling precedes the development and progression of human cancer may hasten the development of pathway inhibitors to augment current therapy.This review summarizes and synthesizes our current knowledge of the canonical Wnt pathway in development and disease.We begin with an overview of the components of the canonical Wnt signaling pathway and delve into the role this pathway has been shown to play in stemness,tumorigenesis,and cancer drug resistance.Ultimately,we hope to present an organized collection of evidence implicating Wnt signaling in tumorigenesis and chemoresistance to facilitate the pursuit of Wnt pathway modulators that may improve outcomes of cancers in which Wnt signaling contributes to aggressive disease and/or treatment resistance.Maryam K.Mohammed Connie Shao Jing Wang Qiang Wei Xin Wang Zachary Collier Shengli Tang Hao Liu Fugui Zhang Jiayi Huang Dan Guo Minpeng Lu Feng Liu Jianxiang Liu Chao Ma Lewis L.Shi Aravind Athiviraham Tong-Chuan He Michael J.Lee 2016Genes & Diseases2016,3,1:70
4Bone Morphogenetic Protein (BMP) signaling in development and human diseases显示文摘Bone Morphogenetic Proteins(BMPs)are a group of signaling molecules that belongs to the Transforming Growth Factor-b(TGF-b)superfamily of proteins.Initially discovered for their ability to induce bone formation,BMPs are now known to play crucial roles in all organ systems.BMPs are important in embryogenesis and development,and also in maintenance of adult tissue homeostasis.Mouse knockout models of various components of the BMP signaling pathway result in embryonic lethality or marked defects,highlighting the essential functions of BMPs.In this review,we first outline the basic aspects of BMP signaling and then focus on genetically manipulated mouse knockout models that have helped elucidate the role of BMPs in development.A significant portion of this review is devoted to the prominent human pathologies associated with dysregulated BMP signaling.Richard N.Wang Jordan Green Zhongliang Wang Youlin Deng Min Qiao Michael Peabody Qian Zhang Jixing Ye Zhengjian Yan Sahitya Denduluri Olumuyiwa Idowu Melissa Li Christine Shen Alan Hu Rex C.Haydon Richard Kang James Mok Michael J.Lee Hue L.Luu Lewis L.Shi 2014Genes & Diseases2014,1,1:47
5甜瓜属野生种及其与黄瓜种间杂交后代抗根结线虫初步研究显示文摘为了鉴定甜瓜属野生种酸黄瓜 (CucumishystrixChakr.)对南方根结线虫 [Meloidogyneincognit(Kofoid&White)Chit wood]的抗性 ,进而评估抗性向酸黄瓜与栽培黄瓜种间杂种的转移 ,选用了酸黄瓜、 4个栽培黄瓜材料、两种倍性水平的 3个正反交杂种F1和 1个回交后代作为试材 ,在温室中进行抗性鉴定和筛选。结果表明 ,酸黄瓜对南方根结线虫具有高度抗性 ,而 4个栽培黄瓜材料均为高度敏感。酸黄瓜平均每株根系形成约 3个根结 ,栽培黄瓜材料每株根系的根结数超过 10 0个。酸黄瓜通过与栽培黄瓜的正反交 ,其抗性已被部分转移到杂种之中。当杂种作为供体亲本与栽培黄瓜进行回交时 ,抗性又被进一步转移到回交一代 (BCF1)陈劲枫 林茂松 钱春桃 庄飞云 Stephen Lewis 2001南京农业大学学报2001,24,1:35
6成人自发性脑出血处理指南——2007年更新版 美国心脏协会/美国卒中协会卒中委员会、高血压研究委员会、医疗质量和转归研究跨学科工作组指南 美国神经病学学会确认本指南作为神经科医生教学工具的价值显示文摘目的:本指南旨在为急性自发性脑出血的诊断和治疗提供最新的综合性推荐意见。方法:通过Medline正式检索截止2006年8月的相关文献,并将撰写委员会已知相关问题的其他论文作为补充,用证据表合并资料。采用美国心脏协会卒中委员会的证据水平分级标准对每项推荐意见进行分级。由5位同行评议专家和卒中委员会领导委员会成员对指南草案进行发表前审阅。预期本指南在3年内完全更新。结果:本文陈述了脑出血的诊断、动脉血压和颅内压增高的处理、脑出血内科并发症的治疗以及复发性脑出血的预防等方面的循证指南。对重组Ⅶ因子延缓早期出血的近期试验进行了讨论。对自发性脑出血治疗的各种外科手术方法提出了推荐意见。最后,对脑出血患者的撤销治疗和临终问题进行了分析。Joseph Broderick Sander Connolly Edward Feldmann Daniel Hanley Carlos Kase Derk Krieger Marc Mayberg Lewis Morgenstern Christopher S.Ogilvy Paul Vespa Mario Zuccarello 王玉洁 刘娟 白璇 李新辉 孙虹 姚志成 张慧 牛英翔 2008中华脑血管病杂志(电子版)2008,2,1:29
7乳腺癌患者配偶夫妻沟通干预方案的修订与实施显示文摘不良的沟通方式会影响乳腺癌夫妻关系的调适。本文详细介绍了乳腺癌患者配偶夫妻沟通干预方案的本土化修订过程、内容、实施方法及效果的初步评价,旨在帮助配偶学会良好的夫妻沟通方法,为乳腺癌家庭支持研究提供参考。李智 刘均娥 陈双琴 Frances Marcus Lewis Ellen H.Zahlis 2016中国护理管理2016,16,2:19
8成人缺血性卒中早期处理指南显示文摘本指南旨在对成年急性缺血性卒中患者评价和治疗各要素的现有证据做一回顾。目标读者是那些为发病后48h内的卒中患者提供治疗的内科医生和其他急诊医疗保健人员。另外,也包括向医疗保健政策制定者提供的信息。方法:专家小组成员由美国心脏协会(AHA)卒中委员会科学声明监督委员会任命,他们代表了来自不同领域的专家。专家小组以2003年后发表的报道为重点,对相关文献进行回顾,采用AHA卒中委员会的证据水平分级标准对证据进行分级并做出推荐。本声明经专家小组认可后,再由AHA科学顾问和协调委员会进行同行评议和正式批准。本指南打算在3年内做全面更新。结果:对急性缺血性卒中患者的处理仍然是多方面的,包括尚未在临床试验中进行过验证的一些医疗诊治方面。本声明包括从急诊医疗服务人员开始接触患者到入院初期处理的推荐意见。静脉重组组织型纤溶酶原激活剂仍然是已得到证实的最有效的卒中急诊治疗干预方法。包括动脉应用溶栓药和机械介入在内的一些方法显示出希望。因为许多推荐是在有限的证据基础上做出的,因此需要对急性缺血性卒中的治疗进行更多的研究。Harold P. Adams Gregory del Zoppo Mark J. Alberts Deepak L. Bhatt Lawrence Brass Anthony Furlan Robert L. Grubb Randall T. Higashida Edward C. Jauch Chelsea Kidwell Patrick D. Lyden Lewis B. Morgenstern Adnan I. Qureshi Robert H. Rosenwasser Phillip A. Scott Eelco F.M. Wijdicks 李焰生(译) 熊昕丽(译) 林岩(译) 沈沸(译) 俞羚(译) 邹静(译) 张静芳(译) 孙亚蒙(译) 周洁茹(译) 蒋仙国(译) 陈莺(译) 2007国际脑血管病杂志2007,15,6:18
9评估调质时间和温度对猪颗粒饲料淀粉糊化度和维生素沉积的影响显示文摘本论文研究了饲料加工的两个关键参数(调质温度和时间)对育肥猪颗粒饲料淀粉糊化度和维生素沉积的影响。日粮配方为含30%干酒糟及其可溶物的玉米-豆粕型基础日粮。整个试验中配方保持不变。本试验采用2×3双因子设计,调质温度分别为77℃和88℃,调质时间分别15秒、30秒和60秒。此外,本试验还设置一个对照组,对照组饲料不采用调质制粒工艺,而是采用粉料饲喂。因此,本试验共有7个处理组。采集调质后制粒前(热干粉)、制粒后冷却前(热制粒)、以及制粒冷却后(冷制粒)的样品,并分析这三种样品的总淀粉率。Lewis LL Stark CR Fahrenholz AC Bergstrom JR Jones CK 2015广东饲料2015,24,5:18
10The versatile functions of Sox9 in development,stem cells,and human diseases显示文摘The transcription factor Sox9 was first discovered in patients with campomelic dysplasia,a haploinsufficiency disorder with skeletal deformities caused by dysregulation of Sox9 expression during chondrogenesis.Since then,its role as a cell fate determiner during embryonic development has been well characterized;Sox9 expression differentiates cells derived from all three germ layers into a large variety of specialized tissues and organs.However,recent data has shown that ectoderm-and endoderm-derived tissues continue to express Sox9 in mature organs and stem cell pools,suggesting its role in cell maintenance and specification during adult life.The versatility of Sox9 may be explained by a combination of posttranscriptional modifications,binding partners,and the tissue type in which it is expressed.Considering its importance during both development and adult life,it follows that dysregulation of Sox9 has been implicated in various congenital and acquired diseases,including fibrosis and cancer.This review provides a summary of the various roles of Sox9 in cell fate specification,stem cell biology,and related human diseases.Ultimately,understanding the mechanisms that regulate Sox9 will be crucial for developing effective therapies to treat disease caused by stem cell dysregulation or even reverse organ damage.Alice Jo Sahitya Denduluri Bosi Zhang Zhongliang Wang Liangjun Yin Zhengjian Yan Richard Kang Lewis L.Shi James Mok Michael J.Lee Rex C.Haydon 2014Genes & Diseases2014,1,2:16
11复杂的农业景观系统中植物物种多样性的评价方法——PLEC农业生物多样性指导小组(PLEC-BAG)对资料搜集与分析的指南显示文摘农业生物多样性已成为国际关注的热点领域之一。本文根据郭辉军等中国专家提出的农业生物多样性评价 (AgrobiodiversityAssessment,ABA)方法为基础 ,提出了景观水平农业生物多样性评价相关术语、基本用词的定义 (表 1 ) ,一系列用于搜集PLEC植物物种多样性核心资料的基本原理 (表 2 )与实用指南 (表 3、 4 ) ,以及资料分析与报告指南 (图 1~ 4 ) ,以指导全球环境基金 /联合国环境署 /联合国大学PLEC项目计划 2 0多个国家的研究。图表可于实地调查时用于搜集及分析核心资料 ;这些资料最终将会包括于PLEC物种多样性数据库。正文则提供辅助的咨询解释。研究组人员在搜集核心资料前必须首先熟悉示范点一般情况 ;搜集核心资料必须依据地块类型分层取样(stratifiedsampling) (表 1 ,2 )。样方调查强调在物种丰富的土地类型取样、重复样区 (sampleareas)、固定样地内搜集资料、以及在恰当的时间间隔后重新测量此样地以观察在农业生物多样性中很重要的时间变化 (表 2 )。实用指南则强调挑选样区的准则、样区的重复数目、样地大小、应记录的资料种类、以及取样频率 (表 4 )。分析上的指导则包括计算样区间物种结构相似度的简易运算方法 (图 2 )以及物种 -面积曲线 (species -areacurves)和丰富度与多样性曲线Daniel J.Zarin 郭辉军 Lewis Enu-Kwesi 2000云南植物研究2000,22,S1:12
12双胎输血综合征选择性激光凝固绒毛膜血管吻合支成功后,晚期胎儿并发症的发生率及其处理显示文摘Objective: This study was undertaken to report on the prevalence and management of late complications in twin-to-twin transfusion syndrome (TTTS) treated by laser therapy when both twins are alive 1 week after surgery. Study design: A total of 151 consecutive TTTS cases were treated by selective fetoscopic laser therapy. Cases in which both twins were alive 1 week after surgery were followed up with ultrasound and Doppler examination, including middle-cerebral artery peak systolic velocity measurement (MCA-PSV). Results: In the 151 cases treated with laser, both twins were still alive 7 days after the procedure in 101 cases. Intrauterine death of 1 and both twins occurred in 7 and 1 cases, respectively. Recurrence of TTTS with the polyhydramnios-oligohydramnios sequence occurred in 14 (14% ) cases. In another 13 (13% ) cases,amniotic fluid remained normal in both sacs, but MCA- PSV increased above 1.5 MoM in 1 twin and decreased concomitantly below 0.8 MoM in the co-twin. This was related to anemia and polycythemia, respectively, and resulted from unidirectional feto-fetal blood transfusion, mainly from former recipients into former donors. Late complications were managed accordingly by repeat laser, amnioreduction, cord coagulation, intrauterine blood transfusion, or elective delivery. Conclusion: MCA-PSV Doppler measurements are useful in the follow-up of double survivors to detect and manage late complications after selective laser therapy.Robyr R. Lewi L. Salomon L.J. Y. Ville 朱国栋 2006世界核心医学期刊文摘(妇产科学分册)2006,0,8:12
13Metformin does not improve survival in patients with hepatocellular carcinoma显示文摘AIM:To assess whether metformin,which has a chemopreventive effect in chronic liver disease,has any chemotherapeutic effect in hepatocellular carcinoma.METHODS:This was a retrospective study of 701 patients with newly diagnosed hepatocellular carcinoma(HCC)seen between January 2005 and June 2011 at Mayo Clinic,Rochester,Minnesota.This patient cohort was a part of the global HCC BRIDGE study,which is a large longitudinal study of HCC determining the realworld experience of HCC characteristics,management and patient outcomes.We defined significant metformin exposure as continuation of this agent at least 90d beyond diagnosis of HCC,and compared survival of diabetic patients on metformin to diabetic patients not on metformin and non-diabetics.RESULTS:Our cohort was 72.9%male,with a mean±SD age of 62.6±12.3 years.The most common etiologies of liver disease were hepatitis C(34%),alcoholic liver disease(29%),fatty liver disease(15%)and hepatitis B(9%).By univariate analysis,using diabetics not on metformin as the reference group,diabetic patients with HCC on metformin had no survival advantage,with a HR(95%CI)of 1.0(0.8-1.3).Non-diabetic HCC patients also did not appear to have a survival advantage as compared to diabetic HCC patients not on metformin,as demonstrated by a HR(95%CI)of1.1(0.7-1.7).Diabetics on metformin beyond 90 d after HCC diagnosis had a longer median survival at 34.2 mo,as compared to 25.5 mo among diabetic patients who were not on metformin or had discontinued metformin within 90 d after HCC diagnosis.This finding was likely due to potential survival bias among those who lived long enough to receive metformin.CONCLUSION:Although the literature suggests a chemotherapeutic effect in other malignancies,our study demonstrates no survival benefit to the use of metformin in diabetic patients with HCC.Mamatha Bhat Roongruedee Chaiteerakij William S Harmsen Cathy D Schleck Ju Dong Yang Nasra H Giama Terry M Therneau Gregory J Gores Lewis R Roberts 2014World Journal of Gastroenterology2014,20,42:11
14Hepatitis B virus prevalence and transmission risk factors in inflammatory bowel disease patients at Clementino Fraga Filho university hospital显示文摘AIM: To evaluate the prevalence of hepatitis B virus (HBV) infection in inflammatory bowel disease (IBD) patients that followed up in our hospital and try to identify the possible risk factors involved in this infection transmission. METHODS: This was a cross-sectional study for which 176 patients were selected according to their arrival for the medical interview. All these patients had already IBD diagnosis. The patient was interviewed and a questionnaire was filled out. RESULTS: In the group of 176 patients whom we examined, we found that 17% (30) were anti-HBc positive. Out of 30 patients with positive anti-HBc, 2.3% (4) had positive HBsAg and negative HBV-DNA. In an attempt to identify the possible HBV infection transmission risk factors in IBD patients, it was observed that 117 patients had been submitted to some kind of surgical procedure, but only 24 patients had positive anti-HBc (P = 0.085). It was also observed that surgery to treat IBD complications was not a risk factor for HBV infection transmission, since we did not get a statically significant P value. However, IBDpatients that have been submitted to surgery to treat IBD complications received more blood transfusions then patients submitted to other surgical interventions (P = 0.015). CONCLUSION: There was a high incidence of positive anti-HBc (17%) and positive HBsAg (2.3%) in IBD patient when compared with the overall population (7.9%).Yolanda Faia Manhes Tolentino Homero Soares Fogaa Cyrla Zaltman Lia Laura Lewis Ximenes Henrique Sérgio Moraes Coelho 2008World Journal of Gastroenterology2008,14,20:10
15Guidelines for the Management of Spontaneous Intracerebral Hemorrhage: A Guideline for Healthcare Professionals From the American Heart Association/American Stroke Association显示文摘Lewis B. Morgenstern J. Claude Hemphill Craig Anderson Kyra Becker Joseph P. Broderick E. Sander Connolly Steven M. Greenberg James N. Huang R. Loch Macdonald Steven R. Messé Pamela H. Mitchell Magdy Selim Rafael J. Tamargo 2010Stroke2010,,9:10
16Expanding role of capsule endoscopy in inflammatory bowel disease显示文摘Capsule endoscopy has been shown to detect small bowel inflammatory changes better than any other imaging modality. Selection criteria have been optimized to increase the yield of capsule endoscopy in patients suspected to have Crohn's disease. Capsule endoscopy allows for earlier diagnosis of Crohn's disease of the small bowel and improved diagnosis of colitis in patients where it is unclear if they suffer from Crohn's or ulcerative colitis. A test capsule is available to assess for small bowel strictures and thus avoid capsule retention. A common language has been developed and a new scoring index will be added to capsule software. It is envisioned that the manner in which we treat Crohn's disease in the future will change, based on earlier diagnosis and treatment aimed at mucosal healing rather than symptom improvement.Blair S Lewis 2008World Journal of Gastroenterology2008,14,26:10
17Biomass Carbon Storage and Its Sequestration Potential of Afforestation under Natural Forest Protection Program in China显示文摘Based on the data from China′s Seventh Forest Inventory for the period of 2004–2008, area and stand volume of different types and age-classes of plantation were used to establish the relationship between biomass density and age of planted forests in different regions of the country. Combined with the plantation area in the first-stage of the Natural Forest Protection(NFP) program(1998–2010), this study calculated the biomass carbon storage of the afforestation in the first-stage of the program. On this basis, the carbon sequestration potential of these forests was estimated for the second stage of the program(2011–2020). Biomass carbon storage of plantation established in the first stage of the program was 33.67 Tg C, which was majority accounted by protection forests(30.26 Tg C). There was a significant difference among carbon storage in different regions, which depended on the relationship of biomass carbon density, forest age and plantation area. Under the natural growth, the carbon storage was forecasted to increase annually from 2011 to 2020, reaching 96.03 Tg C at the end of the second-stage of the program in 2020. The annual growth of the carbon storage was forecasted to be 6.24 Tg C/yr, which suggested that NFP program has a significant potential for enhancing carbon sequestration in plantation forests under its domain.ZHOU Wangming Bernard Joseph LEWIS WU Shengnan YU Dapao ZHOU Li WEI Yawei DAI Limin 2014Chinese Geographical Science2014,24,4:10
18Adaptive dynamic programming for online solution of a zero-sum differential game显示文摘This paper will present an approximate/adaptive dynamic programming(ADP) algorithm,that uses the idea of integral reinforcement learning(IRL),to determine online the Nash equilibrium solution for the two-player zerosum differential game with linear dynamics and infinite horizon quadratic cost.The algorithm is built around an iterative method that has been developed in the control engineering community for solving the continuous-time game algebraic Riccati equation(CT-GARE),which underlies the game problem.We here show how the ADP techniques will enhance the capabilities of the offline method allowing an online solution without the requirement of complete knowledge of the system dynamics.The feasibility of the ADP scheme is demonstrated in simulation for a power system control application.The adaptation goal is the best control policy that will face in an optimal manner the highest load disturbance.Draguna VRABIE Frank LEWIS 2011控制理论与应用(英文版)2011,9,3:10
19Characterization of Gibberellin Receptor Mutants of Barley (Hordeum vulgare L.)显示文摘Gid1 的顺序(为赤霉素(GA ) 的基因从米饭的受体) 被用来从大麦识别通常认为的 orthologue。这在 E 被表示。coli,并且生产了能与结构的特性和 saturability 在 vitro 绑 GA 的蛋白质。它在 GA 回答的潜在的角色与减少的 GA 敏感(gse1 异种) 用大麦异种被调查。十六不同 gse1 异种各在这个序列带了唯一的核苷酸替换。在里面几乎一个案例,这些变化导致了单个氨基酸替换,并且,为留下的异种,在 mRNA 的 5 untranslated 区域的替换被建议防碍翻译开始。在分离有完美的连接在新变异的等位基因和 gse1 显型之间的人口,导致在大麦的通常认为的 GID1 GA 受体顺序对应于 Gse1 地点的结论。在异种之一的内长的 GA 内容的决心揭示了 C20 GA 先锋的 bioactive GA1,和赤字的提高的累积。所有在通常正在浸透的集中 gse1 异种把敏感归结为外长的 GA3,并且到 AC94377 (GA 类似物) ,,但是,在高得多的集中,经常有可观的回答。在大麦和米饭异种之间的比较揭示这之间的有趣的差别在 GA 的二谷物种神经质的生理学。Peter M. Chandler Carol A. Harding Anthony R. Ashton Mark D. Mulcair Nicholas E. Dixonb Lewis N. Manderb 2008Molecular Plant2008,1,2:10
20Forest Carbon Storage and Tree Carbon Pool Dynamics under Natural Forest Protection Program in Northeastern China显示文摘The Natural Forest Protection(NFP) program is one of the Six Key Forestry Projects which were adopted by the Chinese Government since the 1980s to address important natural issues in China. It advanced to protecting and restoring the structures and functions of the natural forests through sustainable forest management. However, the role of forest carbon storage and tree carbon pool dynamics since the adoption of the NFP remains unknown. To address this knowledge gap, this study calculated forest carbon storage(tree, understory, forest floor and soil) in the forest region of northeastern(NE) China based on National Forest Inventory databases and field investigated databases. For tree biomass, this study utilized an improved method for biomass estimation that converts timber volume to total forest biomass; while for understory, forest floor and soil carbon storage, this study utilized forest type-specific mean carbon densities multiplied by their areas in the region. Results showed that the tree carbon pool under the NFP in NE China functioned as a carbon sink from 1998 to 2008, with an increase of 6.3 Tg C/yr, which was mainly sequestrated by natural forests(5.1 Tg C/yr). At the same time, plantations also acted as a carbon sink, reflecting an increase of 1.2 Tg C/yr. In 2008, total carbon storage in forests covered by the NFP in NE China was 4603.8 Tg C, of which 4393.3 Tg C was stored in natural forests and 210.5 Tg C in planted forests. Soil was the largest carbon storage component, contributing 69.5%–77.8% of total carbon storage; followed by tree and forest floor, accounting for 16.3%–23.0% and 5.0%–6.5% of total carbon storage, respectively. Understory carbon pool ranged from 1.9 to 42.7 Tg C, accounting for only 0.9% of total carbon storage.WEI Yawei YU Dapao Bernard Joseph LEWIS ZHOU Li ZHOU Wangming FANG Xiangmin ZHAO Wei WU Shengnan DAI Limin 2014Chinese Geographical Science2014,24,4:9
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