检索结果-南通市图书馆

Biodiversity and belowground interactions mediate community invasion resistance against a tall herb invader

Journal of Plant Ecology 2010年第2期3卷 99-108页

作者： Christoph Scherber Peter NMwangi Martin Schmitz Michael Scherer-Lorenzen holger beßler Christof Engels Nico Eisenhauer Varvara DMigunova Stefan Scheu Wolfgang WWeisser Ernst-Detlef Schulze Bernhard Schmid Agroecology Department of Crop ScienceUniversity of GottingenWaldweg 26D-37073 GottingenGermany Institute of Evolutionary Biology and Environmental Studies University of ZurichWinterthurerstraße 92CH-8057 ZurichSwitzerland Max Planck Institute for Biogeochemistry Hans-Knoll Straße 10D-07745 JenaGermany Institute of Ecology Jena UniversityDornburger Straße 159D-07743 JenaGermany Institut fur Biologie II/Geobotanik Schanzlestr.1D-79104 FreiburgGermany Humboldt Universitat zu Berlin Fachgebiet PflanzenernahrungAlbrecht-Thaer-Weg 4D-14195 BerlinGermany J.F.Blumenbach Institute of Zoology and Anthropology University of GottingenBerliner Str.28D-37073 GottingenGermany K.I.Skryabin All-Russian Institute of Helminthology Bolschaya Tcheryomuschkinskaya str.28117218 MoscowRussia

Aims Species-rich plant communities are hypothesized to be more resistant against plant invasions because they use resources in a more efficient ***,the relative contributions of aboveground competition and belowground interactions for invasion resistance are still poorly *** We compared the performance of Knautia arvensis transplants growing in plots differing in plant diversity both under full competition and with shoots of neighbors tied back to determine the relative strength of aboveground competition in suppressing this test invader without the confounding effect of *** addition,we assessed the effects of belowground competition and soil-borne pathogens on transplant *** Findings Both aboveground competition and plant species richness strongly and independently affected invader *** biomass,height,leaf mass per area and flowering of transplanted individuals of *** decreased with increasing species richness of the host ***-rich and species-poor communities both imposed equally strong aboveground competition on ***,belowground interactions(especially belowground root competition)had strong negative effects on transplant *** addition,the presence of grasses in a plant community further reduced the performance of *** results suggest that belowground competition can render species-rich host communities more suppressive to newly arriving species,thus enhancing community invasion resistance.

关键词： aboveground competition competitive suppression belowground interactions root competition shoot exclusion species richness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Paleomapping:Creating testable visual hypotheses of ancient worlds

引用

Journal of Palaeogeography 2025年第01期14卷 91-104页

作者： holger Petermann Annaka M.Clement Patrick M.Sullivan Hannah M.Bonner James W.Hagadorn Department of Earth and Space Sciences Denver Museum of Nature & Science Colorado School of Mines Department of Geology and Geologic Engineering Division of Water Quality Utah Department of Environmental Quality

The story of the Earth's changing landscapes is often told through paleogeographic maps. These images are some of the most accessible and widely used illustrations in the Earth sciences. However, no formal procedure for the creation of photorealistic paleomaps(i.e., paleosatellite images) exists. Using an example from the Late Jurassic of the Rocky Mountain region, we present a method for making paleoenvironmental and paleosatellite maps that is scalable, reproducible, testable, and incorporates peer review. The process includes a literature review followed by data-visualization, paleoenvironmental interpretation, peer-review,iterative revisions, and the creation of a false contour map and color gradient used to render a paleosatellite image. Paleosatellite images are photorealistic versions of paleoenvironmental maps that incorporate global climatic and tectonic information as well as principles of actualism; they can be made through comparison to analogous modern landscapes. An important component of this process is that the data maps that ground this paleomapping process allow evaluation of where paleoenvironmental interpretations are wellsupported by outcrop and subsurface data, and where such visualization is highly interpretive-often because of lack of available rocks or studies in a given area. As such, our paleoenvironmental maps and paleosatellite images are testable pictorial hypotheses. By outlining a procedure that produces referenced,data-rich, and visually realistic maps, we hope to demystify the paleoenvironmental map-making process and improve accessibility of paleomaps for the broader geoscience community. Where resources and complementary data are available, such maps also have potential for georeferencing and integration with larger continent-scale paleogeographic maps.

关键词： Ancient landscapes Cartography Paleogeography Paleoenvironments Jurassic

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Differences in Seedling and Sapling Densities and Species Composition between Canopy Gaps and Forest Understories in a Subtropical Forest in Bangladesh

引用

Journal of Resources and Ecology 2025年第1期16卷 105-114页

作者： Tarit Kumar BAUL Anwarul Islam CHOWDHURY Md Jamal UDDIN Mohammad Kamrul HASAN Tapan Kumar NATH Lars holger SCHMIDT Institute of Forestry and Environmental Sciences University of ChittagongChittagong 4331Bangladesh Faculty of Science Forestry and TechnologySchool of Forest SciencesUniversity of Eastern FinlandJoensuu 80101Finland Department of Agricultural and Forest Sciences and Engineering University of LleidaLleida 25001Spain Natural Resources Institute Finland(Luke) Helsinki 00790Finland Faculty of Science and Engineering University of Nottingham MalaysiaJalan Broga 43500Malaysia Department of Geoscience and Natural Resource Management University of CopenhagenFrederiksberg C 1958Denmark

Canopy openings have a vital role in forest structure,regeneration,and plant *** this study,we investigated and compared the species composition and densities of seedlings and saplings between canopy gaps(openings)and forest understories(in dense canopies)in a sub-tropical forest of *** objectively identified 42 canopy openings between transect lines and 42 main plots in dense canopies,sampled for regeneration and young tree *** the regeneration study,we placed 2 m×2 m four subplots in each canopy opening and the main plot of dense canopy,thus making a total of 336 *** species diversity of seedlings,saplings,and trees were significantly(P≤0.05)higher in the dense canopy than in the canopy ***,most dominant and frequent regenerating species such as Diospyros pilosula,Garcinia cowa,Brownlowia elata,and Lithocarpus polystachya were common in both dense canopy and openings,the canopy openings had the highest Importance Value Index,suggesting the significance of gap dynamics in the dominance of native floral *** dense canopy played an important role in forest compositions because 12 regenerating species,including Stereospermum suaveolens and Diospyros montana,were not found in the canopy openings,implying that rain forests must maintain a high canopy cover for regeneration.

关键词： canopy opening disturbance forest dynamics native flora seedling sapling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Regulation of gene-edited plants in Europe:from the valley of tears into the shining sun?

引用

aBIOTECH 2024年第2期5卷 231-238页

作者： holger Puchta Department of Molecular Biology Joseph Gottlieb Kolreuter Institute for Plant SciencesKarlsruhe Institute of Technology(KIT)Fritz-Haber-Weg 476131 KarlsruheGermany

Some 20 years ago,the EU introduced complex regulatory rules for the growth of transgenic crops,which resulted in a de facto ban to grow these plants in fields within most European *** the rise of novel genome editing technologies,it has become possible to improve crops genetically in a directed way without the need for incorporation of foreign ***,in 2018,the European Court of Justice ruled that such gene-edited plants are to be regulated like transgenic *** then,European scientists and breeders have challenged this decision and requested a revision of this outdated ***,after 5 years,the European Commission has now published a proposal on how,in the future,to regulate crops produced by new breeding *** proposal tries to find a balance between the different interest groups in *** one side,genetically modified plants,which cannot be discerned from their natural counterparts,will exclusively be used for food and feed and are-besides a registration step-not to be regulated at *** the other side,plants expressing herbicide resistance are to be excluded from this regulation,a concession to the strong environmental associations and NGOs in ***,edited crops are to be excluded from organic farming to protect the business interests of the strong organic sector in ***,if this law passes European parliament and council,unchanged,it will present a big step forward toward establishing a more sustainable European agricultural ***,it might soon be possible to develop and grow crops that are more adapted to global warming and whose cultivation will require lower amounts of ***,there is still a long way to go until the law is *** often,the storm of arguments raised by the opponents,based on irrational fears of mutations and a naive understanding of nature,has fallen on fruitful ground in Europe.

关键词： Genetically modified organism Cisgenesis Gene editing CRISPR/Cas Regulation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Broadening the applicability of CRISPR/Cas9 in plants

引用

Science China(Life Sciences) 2018年第1期61卷 126-127页

作者： holger Puchta Botanical Institute Karlsruhe Institute of Technology

The use of CRISPR（clustered regulatory interspaced short palindromic repeats）Cas9 is revolutionizing genome engineering—not only in plants（Schiml and Puchta,2016）.This is due to the fact that with high specificit... 详细信息

关键词： Broadening the applicability of CRISPR/Cas9 in plants NAG

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

How open is the therapeutic horizon for pancreatic cancer patients?

引用

Hepatobiliary & Pancreatic Diseases International 2022年第1期21卷 1-3页

作者： holger Kalthoff Institute for Experimental Cancer Research Christian-Albrechts-UniversityKielGerman

In the nineties of the last century,it was typical for an article about pancreatic cancer to start with an introductory remark,that this malignancy is a very desperate one and that surgery is the only curative *** it was also obvious that surgery was not really curative and most importantly,not feasible in the majority of *** the last two decades,we observed a dramatic increase in research on pancreatic cancer(*** than 65000 articles mentioning pancreatic cancer in PubMed only in the last decade),and clearly,there is scientific progress.

关键词： cancer curative surgery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computational biology approach to uncover hepatitis C virus helicase operation

引用

World Journal of Gastroenterology 2014年第13期20卷 3401-3409页

作者： holger Flechsig Department of Physical Chemistry Fritz Haber Institute of the Max Planck Society14195 BerlinGermany

Hepatitis C virus(HCV)helicase is a molecular motor that splits nucleic acid duplex structures during viral replication,therefore representing a promising target for antiviral ***,a detailed understanding of the mechanism by which it operates would facilitate the development of efficient drug-assisted therapies aiming to inhibit helicase *** extensive investigations performed in the past,a thorough understanding of the activity of this important protein was lacking since the underlying internal conformational motions could not be *** we review investigations that have been previously performed by us for HCV *** methods of structure-based computational modelling it became possible to follow entire operation cycles of this motor protein in structurally resolved simulations and uncover the mechanism by which it moves along the nucleic acid and accomplishes strand *** also discuss observations from that study in the light of recent experimental studies that confirm our findings.

关键词： Hepatitis C virus Viral replication Helicase protein Adenosine-triphosphate-induced operation Conformational motions Nucleic acid unzipping Computational biology Coarse-grained modelling Elastic-network model

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Automated analysis of surface facets:the example of cesium telluride

引用

npj Computational Materials 2024年第1期10卷 2845-2853页

作者： holger-Dietrich Saßnick Caterina Cocchi Carl von Ossietzky Universität Oldenburg Physics DepartmentD-26129 OldenburgGermany

High-throughput screening combined with ab initio calculations is a powerful tool to explore technologically relevant materials characterized by complex configurational *** the impressive developments achieved in this field in the last few years,most studies still focus on bulk materials,although the relevant processes for energy conversion,production,and storage occur on ***,we present an automatized computational scheme that is capable of calculating surface properties in inorganic crystals from first principles in a high-throughput *** introducing the method and its implementation,we showcase its applicability,focusing on four polymorphs of Cs_(2)Te,an established photocathode material for particle accelerators,considering slabs with low Miller indices and different *** analysis gives insight into how the surface composition,accessible through the proposed high-throughput screening method,impacts the electronic properties and,ultimately,the photoemission *** developed scheme offers new opportunities for automated computational studies beyond bulk materials.

关键词： analysis calculating termination

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Restoration of function after cortical lesion: does it require an internal template?

引用

Neural Regeneration Research 2014年第23期9卷 2029-2031页

作者： holger Schulze Konstantin Tziridis Experimental Otolaryngology Friedrich-Alexander University Erlangen-Nürnberg

The brain controls virtually all body functions, both internally and in interaction with the external environment. As the basic body anatomy of all vertebrates has a bilateral symmetry, structures and functions of vertebrate brains are also organized according to this fundamental anatomical principle to meet all sensory, motor, and internal requirements of body control. Consequently, particular parts or functions of the body are controlled by particular brain structures.

关键词： does it require an internal template

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Progress in the research and application of coal mining with stowing

引用

International Journal of Mining Science and Technology 2013年第1期23卷 7-12页

作者： Junker Martin Witthaus holger RAG Mining Solutions GmbH Shamrockring 1 44623 Herne Germany

The development and achievements of modern coal mining with stowing are discussed in this paper. The necessity of developing coal mining with stowing is briefly summarized and internal damage within the strata and external damage on surface induced by longwall working with caving are discussed. Technological features of coal mining with pneumatic stowing in Germany, and fully mechanised coal mining with solid dense stowing in China, are discussed. In German hard coal mining stowing technologies are for technical, infrastructural and economical reasons not applicable. The discussion includes the stowing material transportation system, the stowing machine, and processes at the face. Progressiveness and application universality of China's fully mechanised coal mining with solid dense stowing are illustrated through practical examples with different conditions. Obviously, the fully mechanised coal mine with solid dense stowing can be improved by automaion systems. This paper discusses further developmental potential of the technology.

关键词： Coal mining with solid stowing Coal mining with pneumatic stowing Fully mechanised Coal mining with stowing in China and Germany

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：