Results 51 to 60 of about 35,026 (237)
Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 1999 用INDO方法研究了氮杂与硼杂碳笼CnX(n=59,69;X=N+,B-)的电子结构和光谱,表明CnX与C60,C70相比将发生结构畸变,氮杂碳笼比硼杂碳笼稳定,C70中靠近极附近的两种C原子易被杂原子置换.本文在对电子跃迁进行理论指认的同时,讨论了光谱红移的原因.
TENGQi-wen(滕启文), WUShi(吴师)
doaj +1 more source
StudyontheStructureandCompositionofForestof HuangshanScenicArea [PDF]
, 2016 为了全面了解黄山风景名胜区主要森林群落类型、植物物种多样性及其分布状况，本文选择了天海景区、北海景区、玉屏景区、西海景区、温泉景区、云谷景区、浮溪保护区、西大门等多个区域，通过样线法和典型样地法相结合，在4条样线、62个样地群落调查基础上，结合前人研究成果，分别从植物区系成分、植被类型分类、珍稀濒危植物、群落物种多样性特征、群落的海拔梯度变化等方面进行综合研究。主要研究结果如下： （1）黄山风景名胜区植物种类丰富，区系成分复杂。共有种子植物173科648属1483种（包括变种、亚种和变型），其中 ...
吕霖
core
Conservation Biology, EarlyView.Abstract Recognition and engagement of Indigenous Peoples and local communities (IP&LCs) and other traditional knowledge (TK) holders in formal biodiversity governance remain limited, despite their significant contribution to the conservation and sustainable use of biodiversity through their knowledge, innovations, practices, and land stewardship.
Kinga Öllerer +8 more
wiley +1 more source
全球能源互联网, 2019 当前中国正处在能源结构转型的关键阶段，传统能源结构的利用效率受限，多种能源相互协同发展受阻，经济效益也徘徊在较低水平。以能源革命为背景，发展综合能源系统是能源结构转型的重要组成部分。其以智能电网为核心枢纽，结合电网、天然气网、热传输网以及多能耦合设备，利用多种能源的耦合性和互补替代性，不仅可弥补可再生能源的间歇性和随机性波动等问题，也可加强供给侧和需求侧的相互响应，提高综合能源利用效率，通过协同方式实现资源的最佳配置。目前中国综合能源系统示范工程大多在工业园区落成，因此围绕工业园区综合能源系统这一背景 ...
蒋超凡, 艾欣
doaj +1 more source
, 2007 郝景盛在西北考查团中的植物考察和采集,是中国学者在新中国成立之前在青海地区有限的几次之一.当时西方人在青藏高原的考察已经很多.郝景盛后来在德国完成的博士论文《青海植物地理》,以他自己的这次考察为基础,充分利用了西方已有的研究成果,对青海东北部作了植物地理学研究 ...
徐凤先
core
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 1999 对Sr原子5snd1D2(n=22～27)，｜m｜=0,1,2各Rydberg态的场电离阈作了实验测定和理论计算.讨论了原子场电离过程中的能级Stark位移，电离的绝热或非绝热路径以及环境热辐射等因素对场电离可能产生影响.
QIUJi-zhen(邱济真), LIJing(郦菁)
doaj +1 more source
, 2007 通过线粒体Cytb基因全序列分析,探讨了青海湖裸鲤和花斑裸鲤的起源关系及其进化模式.系统发育分析进一步支持了青海湖裸鲤和花斑裸鲤3个mtDNA谱系的划分.形态上具有高鳃耙变异的个体未形成特有的进化枝,证明了第一鳃弓外鳃耙变异并不具有系统发育意义.对青海湖裸鲤和花斑裸鲤进化枝扩散模式的网络分析表明,黄河独有的单倍型A1是一个创立者单倍型,全部青海湖裸鲤的样品来自于它的辐射,而青海湖裸鲤可能仅仅起源于黄河花斑裸鲤两个主要支系中的一个 ...
何舜平 +5 more
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Geographic risks to functional groups of mammals and birds from habitat loss in Mexico
Conservation Biology, EarlyView.Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source