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Abundance-weighted plant functional trait variation differs between terrestrial and wetland habitats along wide climatic gradients

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Science china(Life Sciences) 2021年第4期64卷 593-605页

作者： Yu-Kun hu Guo-Fang Liu Xu Pan Yao-Bin Song Ming Dong johannes h.c.cornelissen Key Laboratory of hangzhou city for Eeosystem Protection and Restoration College of Life and Environmental SciencesHangzhou Normal UniversityHangzhou 311121 China Srate Key Laboratory of Vegetation and Environmental change Instiute of BotanyChinese Academy of SciencesBeijing 100093China Beijing Key Laboratory of Weland Services and Restoration Institute of Wetland ResearchChinese Academy of Forestry.Beijing 100091China Systems Ecologv.Department of Ecological Science Vrije Universiteit AmsterdamDe Boelelaan 10851081 HV Amsterdamthe Netherlands

Patterns of plant trait variation across spatial scales are important for understanding ecosystem functioning and ***,habitat-related drivers of these patterns are poorly *** a conceptual model,we ask whether and how the patterns of within-and among-site plant trait variation are driven by habitat type(terrestrial ***)across large climatic *** tested these through spatial-hierarchical-sampling of leaves in herbaceous-dominated terrestrial and wetland communities within each of 26 sites across *** all 13 plant traits,within-site variation was larger than among-site variation in both terrestrial and wetland ***-site variation was similar in most leaf traits related to carbon and nutrient economics but larger in specific leaf area and size-related traits(plant height,leaf area and thickness)in wetland compared to terrestrial ***-site variation was larger in terrestrial than wetland habitats for 10 leaf traits but smaller for plant height,leaf area and leaf *** results indicate the important role of local ecological processes in driving plant trait variation among coexisting species and the dependence of functional variation across habitats on traits *** findings will help to understand and predict the effects of climatic or land-use changes on ecosystem functioning and services.

关键词： community-weighted mean(cWM) functional biogeography functional diversity leaf economic traits size-related traits spatial scale wetlands

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Multi-stemming strategies of Quercus glauca in an evergreen broad-leaved forest: when and where

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Journal of Plant Ecology 2020年第6期13卷 738-743页

作者： Mide Rao Duo Ye Jianhua chen Jian Ni Xiangcheng Mi Mingjian Yu Keping Ma johannes h.c.cornelissen college of chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321004China Department of Ecological Science Faculty of ScienceVrije Universiteit AmsterdamDe Boelelaan 10851081 HV AmsterdamThe Netherlands State Key Laboratory of Vegetation and Environmental change Institute of BotanyChinese Academy of SciencesBeijing 100093China college of Life Sciences Zhejiang UniversityHangzhou 310058China

Aims Multi-stemming supports plants’resilience to disturbances and then contributes to soil stabilization and forest function,especially in mountain *** questions remain about(i)the ontogenetic phase at which multiple stems can occur,(ii)how habitat drivers affect multi-stemming and(iii)whether ontogenetic phase and habitat drivers *** asked these questions for Quercus glauca(ring-cupped oak),the dominant species and sprouter across large warm-temperate areas of Asia;its multi-stemmed trees reflect individual survival,population regeneration and forest ecosystem *** In a 5-ha permanent plot of subtropical evergreen broad-leaved forest in eastern china,we examined the temporal patterns and spatial distribution of multi-stemmed trees of *** within 99 quadrats of 20 m×20 *** Findings There were three temporal modes for multi-stemming among the *** trees and most of them appeared to produce multiple stems from an early *** disturbances related to slope convexity appear to be the main drivers of multi-stemming of ***,the closer to the ridge,the earlier the multi-stemming ***,also for other woody species in other forests and climate zones,ontogeny and environmental drivers promoting disturbance(not only geomorphology,but also extreme weather events,soil drought,fire),as well as soil fertility,need to be considered in combination to better understand multi-stemming and its consequences for community structure.

关键词： life history strategy multi-stemmed trees ontogenetic phase persistence Quercus glauca topography

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cO_2浓度变化下燕麦对干旱胁迫的生理响应

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草业科学 2015年第7期32卷 1116-1123页

作者：刘锦春 johannes h.c.cornelissen 三峡库区生态环境教育部重点实验室重庆市三峡库区植物生态与资源重点实验室西南大学生命科学学院重庆400715 Systems Ecology Department of Ecological ScienceFaculty of Earth and Life SciencesVU University

利用步入式cO2生长室模拟研究了cO2浓度变化和土壤含水量的交互作用对燕麦(Avena sativa)的光合、生长及水分利用效率的影响。结果表明,低cO2浓度对燕麦的光合作用和生物量产生极大的抑制作用,而高cO2浓度产生一定的促进作用。在低cO2... 详细信息

利用步入式cO2生长室模拟研究了cO2浓度变化和土壤含水量的交互作用对燕麦(Avena sativa)的光合、生长及水分利用效率的影响。结果表明,低cO2浓度对燕麦的光合作用和生物量产生极大的抑制作用,而高cO2浓度产生一定的促进作用。在低cO2浓度下,燕麦的净光合速率和水分利用效率随着水分含量的降低没有发生显著变化,生物量和叶氮含量有少量降低,根冠比增加。在高cO2浓度下,燕麦的净光合速率、根冠比、水分利用效率随着水分含量的降低而有升高趋势,叶氮含量变化不显著,但生物量显著下降。研究认为过去低cO2浓度没有加剧干旱对燕麦的负面影响,将来高cO2浓度也未能减缓干旱对燕麦的负面影响。燕麦对过去低cO2浓度的适应可能限制了自身对将来高cO2浓度的响应。

关键词： cO2浓度升高燕麦水分胁迫光合速率生物量

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6种草本植物对干旱胁迫和cO_2浓度升高交互作用的生长响应

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生态学报 2015年第18期35卷 6110-6119页

作者：高凯敏刘锦春梁千慧 Andries A.Temme johannes h.c.cornelissen 三峡库区生态环境教育部重点试验室重庆市三峡库区植物生态与资源重点试验室西南大学生命科学学院重庆400715 Department of Ecological Science VU University Amsterdam De Boelelaan 10851081 HV Amsterdam the Netherlands

以cO2浓度升高为主要标志的全球气候变化及由其引起的极端气候变化对陆地生态系统产生了重要的影响。利用步入式cO2生长室模拟研究了cO2浓度变化(400和700μL/L)和干旱胁迫(水分充足cK:100%Fc(田间持水量);中度干旱MS:40%Fc;重度干旱SS:... 详细信息

以cO2浓度升高为主要标志的全球气候变化及由其引起的极端气候变化对陆地生态系统产生了重要的影响。利用步入式cO2生长室模拟研究了cO2浓度变化(400和700μL/L)和干旱胁迫(水分充足cK:100%Fc(田间持水量);中度干旱MS:40%Fc;重度干旱SS:20%Fc)的交互作用对草本植物网果酸模(Rumex chalepensis)、野豌豆(Vicia sepium)、泥胡菜(hemmistepta lyrata)、风轮菜(clinopodium chinense)、藜(chenopodium album)和玉米石(Sedum album)生长特性的影响。结果表明:cO2浓度升高总体上刺激了网果酸模、野豌豆、泥胡菜、风轮菜和藜这5种c3植物在任何水分条件下的生长,也刺激了玉米石在水分条件较好下的生长;干旱胁迫总体上抑制了所有6种植物的生长,但中度干旱胁迫有刺激cAM植物玉米石生长的趋势。cO2浓度升高能否缓解干旱的负面影响具有明显的种间差异:cO2浓度升高减缓了干旱胁迫对泥胡菜和风轮菜的负面影响,这种缓解作用在网果酸模和野豌豆中显著降低,对藜没有明显的促进作用,对干旱下的玉米石的生长却起到了抑制作用。cO2浓度升高总体上增加了根质量分数和干物质含量;干旱胁迫明显提高了6种草本植物的根生物量的分配比例,降低了干物质含量;但cO2浓度升高和干旱胁迫的交互作用可导致不同的物种产生不同的响应,说明植物能够通过调节生物量分配和植株本身的水分含量保持能力来适应cO2浓度和干旱胁迫的交互影响,这种调节能力取决于植物在碳的吸收和水分散失之间的平衡"trade-off"。研究结果有助于增进草本植物对未来气候变化的适应性理解,为评估和预测全球气候和水文变化对植物的生理生态影响提供理论依据。

关键词： cO2浓度升高干旱胁迫生物量分配草本植物田间持水量(Fc)

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6种草本植物对“过去-现在-未来”cO_2浓度的生长响应

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西南大学学报（自然科学版） 2017年第1期39卷 61-68页

作者：梁千慧刘锦春高凯敏 johannes h.c.cornelissen 三峡库区生态环境教育部重点实验室/重庆市三峡库区植物生态与资源重点实验室/西南大学生命科学学院重庆400715 Department of Systems Ecology Insititute of Ecological ScienceVU University Amsterdam

以6种草本植物泥胡菜hemistepta lyrata,网果酸模Rumex chalepensis,野豌豆Vicia Sepium,藜chenopodium album,风轮菜clinopodium chinense和玉米石Sedum album为研究对象,利用步入式cO_2浓度控制生长室模拟研究了"过去(150μmol/mol)-现在(400μmol/mol)-将来(700μmol/mol)"cO_2浓度对植物生长特性的影响.结果表明:cO_2浓度升高刺激了6种植物的总生物量和相对生长速率,但cO_2浓度从过去的低浓度升高到目前浓度水平时,其升高幅度大于cO_2浓度从目前浓度升高到将来浓度水平.在过去水平下cO_2浓度升高刺激了6种植物的根质量分数,但将来水平下cO_2浓度升高对6种植物的根质量分数没有产生显著性影响.研究结果表明植物对过去cO_2浓度的适应性响应会抑制植物对将来cO_2浓度的生长响应,但不同物种之间存在差异.该研究结果有助于理解草本植物在未来气候变化下的响应,为评估和预测全球气候变化对植物的生理生态影响提供理论依据.

关键词： cO2浓度生物量相对生长速率进化全球气候变化

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Silk-based nerve guidance conduits with macroscopic holes modulate the vascularization of regenerating rat sciatic nerve

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Neural Regeneration Research 2025年第6期20卷 1789-1800页

作者： carina hromada Patrick heimel Markus Kerbl LászlóGál Sylvia Nürnberger Barbara Schaedl James Ferguson Nicole Swiadek Xavier Monforte johannes c.heinzel Antal Nógrádi Andreas h.Teuschl-Woller David hercher Department Life Science Engineering University of Applied Sciences Technikum WienViennaAustria Austrian cluster for Tissue Regeneration ViennaAustria Ludwig Boltzmann Institute for Traumatology The Research Center in Cooperation with AUVAViennaAustria University clinic of Dentistry Medical University of ViennaViennaAustria Department of Plastic Reconstructive and Aesthetic SurgeryLandesklinikum Wiener Neustadt2700 Wiener NeustadtAustria Department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary Medical University of Vienna Department of Orthopedics and Trauma SurgeryDevision of Trauma SurgeryViennaAustria Department of hand- PlasticReconstructive and Burn SurgeryBG Unfallklinik TuebingenUniversity of TuebingenTuebingenGermany

Peripheral nerve injuries induce a severe motor and sensory deficit. Since the availability of autologous nerve transplants for nerve repair is very limited, alternative treatment strategies are sought, including the use of tubular nerve guidance conduits(tNGcs). however, the use of tNGcs results in poor functional recovery and central necrosis of the regenerating tissue, which limits their application to short nerve lesion defects(typically shorter than 3 cm). Given the importance of vascularization in nerve regeneration, we hypothesized that enabling the growth of blood vessels from the surrounding tissue into the regenerating nerve within the tNGc would help eliminate necrotic processes and lead to improved regeneration. In this study, we reported the application of macroscopic holes into the tubular walls of silk-based tNGcs and compared the various features of these improved silk^(+) tNGcs with the tubes without holes(silk^(–) tNGcs) and autologous nerve transplants in an 8-mm sciatic nerve defect in rats. Using a combination of micro-computed tomography and histological analyses, we were able to prove that the use of silk^(+) tNGcs induced the growth of blood vessels from the adjacent tissue to the intraluminal neovascular formation. A significantly higher number of blood vessels in the silk^(+) group was found compared with autologous nerve transplants and silk^(–), accompanied by improved axon regeneration at the distal coaptation point compared with the silk^(–) tNGcs at 7 weeks postoperatively. In the 15-mm(critical size) sciatic nerve defect model, we again observed a distinct ingrowth of blood vessels through the tubular walls of silk^(+) tNGcs, but without improved functional recovery at 12 weeks postoperatively. Our data proves that macroporous tNGcs increase the vascular supply of regenerating nerves and facilitate improved axonal regeneration in a short-defect model but not in a critical-size defect model. This study suggests that further optimizatio

关键词： axon regeneration blood vessel functional recovery macroporous nerve lesion peripheral nerve repair sciatic nerve silk-based nerve guidance conduit vascularization

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Genomic Mosaicism of the Brain:Origin,Impact,and Utility

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Neuroscience Bulletin 2024年第6期40卷 759-776页

作者： Jared h.Graham johannes c.M.Schlachetzki Xiaoxu Yang Martin W.Breuss Department of Pediatrics Section of Clinical Genetics and MetabolismUniversity of Colorado School of MedicineAurora80045-2581COUSA Department of cellular and Molecular Medicine University of California San DiegoLa Jolla92093-0021San DiegoCAUSA Department of Neurosciences University of California San DiegoLa Jolla92093-0021San DiegoCAUSA Rady children’s Institute for Genomic Medicine San Diego92123CAUSA

Genomic mosaicism describes the phenomenon where some but not all cells within a tissue harbor unique genetic ***,research focused on the impact of genomic mosaicism on clinical phenotype—motivated by its involvement in cancers and overgrowth *** recently,we increasingly shifted towards the plethora of neutral mosaic variants that can act as recorders of cellular lineage and environmental ***,we summarize the current state of the field of genomic mosaicism research with a special emphasis on our current understanding of this phenomenon in brain development and *** the field of genomic mosaicism has a rich history,technological advances in the last decade have changed our approaches and greatly improved our *** will provide current definitions and an overview of contemporary detection approaches for genomic ***,we will discuss the impact and utility of genomic mosaicism.

关键词： Genomics Brain development Brain homeostasis Genomic mosaicism

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Nordhaus-Gaddum Results for the Sum of the Induced Path Number of a Graph and Its complement

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Acta Mathematica Sinica,English Series 2012年第12期28卷 2365-2372页

作者： johannes h.hATTINGh Ossama A.SALEh Lucas c.VAN DER MERWE Terry J.WALTERS Department of Mathematics East Carolina University Department of Mathematics University of Johannesburg Department of Mathematics University of Tennessee at Chattanooga

The induced path number p（G） of a graph G is defined as the minimum number of subsets into which the vertex set of G can be partitioned so that each subset induces a path. Broere et hi. proved that if G is a graph of order n, then 〈 p（G）＋ p（G）〈3n/2] . In this paper,_we characterize [3n/2], improve the lower bound on p（G）＋ p（G） by one when the graphs G for which p（G） -4- p（G） = 3n n is the square of an odd integer, and determine a best possible upper bound for p（G）＋ p（G） when neither G nor G has isolated vertices.

关键词： Nordhaus-Gaddum induced path number

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chronic peripheral inflammation: a possible contributor to neurodegenerative diseases

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Neural Regeneration Research 2021年第9期16卷 1711-1714页

作者： Patrick Süβ Addison J.Lana johannes c.M.Schlachetzki Department of Molecular Neurology Friedrich-Alexander-University Erlangen-NürnbergUniversity Hospital ErlangenErlangenGermany Department of cellular and Molecular Medicine University of California San DiegoLa JollaCAUSA

The contribution of chronic peripheral inflammation to the pathogenesis of neurodegenerative diseases is an outstanding question. Sustained activation of the peripheral innate and adaptive immune systems occurs in the context of a broad array of disorders ranging from chronic infectious diseases to autoimmune and metabolic diseases. In addition, progressive systemic inflammation is increasingly recognized during aging. Peripheral immune cells could potentially modulate the cellular brain environment via the secretion of soluble molecules. There is an ongoing debate whether peripheral immune cells have the potential to migrate into the brain under certain permissive circumstances. In this perspective, we discuss the possible contribution of chronic peripheral inflammation to the pathogenesis of age-related neurodegenerative diseases with a focus on microglia, the resident immune cells of the brain parenchyma.

关键词： aging Alzheimer's disease inflammation innate immune system microglia neurodegeneration Parkinson's disease

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^(18)F-FDG-PET/cT-guided radiotherapy of cervical lymph nodes in head and neck squamous cell carcinoma

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Journal of cancer Metastasis and Treatment 2021年第1期7卷 353-363页

作者： Maurice c.cox Sven van den Bosch Tim Dijkema johannes h.A.M.Kaanders Department of Radiation Oncology Radboud University Medical Center6525 GA Nijmegenthe Netherlands

The use of positron emission tomography with fluor-18-fluorodeoxyglucose(FDG-PET)in clinical practice for patients with head and neck squamous cell carcinoma(hNScc)has expanded rapidly,with implications for diagnostic staging,radiotherapy planning,adaptive radiotherapy,and post-therapy *** implementation of FDG-PET/cT in radiation treatment planning not only has consequences for target volume definition and dose prescription but is also associated with an increased overall survival in patients with ***-PET/cT-guided gradient dose prescription provides a window of opportunity for treatment de-intensification of the neck in order to decrease treatment-related toxicity without compromising oncological ***,interim FDG-PET/cT during radiotherapy can be useful to assess metabolic tumor response and enables opportunities for adaptive treatment *** goals are to increase treatment effectivity in poor responders and reduce unnecessary toxicity in patients with good early tumor *** prospective trials investigating adaptive radiotherapy based on interim PET-evaluation are needed,especially regarding human papilloma virus-negative hNScc and patients treated with primary radiotherapy.

关键词： head and neck cancer radiotherapy FDG-PET imaging nodal metastases

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