Results 71 to 80 of about 20,496 (171)
Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework
Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift +8 more
wiley +1 more source
云南西双版纳地理位置独特,森林覆盖率高,哺乳动物物种多样性丰富,但至今仅记录分布管鼻蝠2种,低于周边区域,存在被低估的可能。为摸清西双版纳热带植物园哺乳动物物种多样性状况,2019年4—5月在园区内进行生物多样性考察,使用蝙蝠竖琴网采集到管鼻蝠标本15只,根据其外形和头骨的形态学特征、数值分类学结果及基于线粒体细胞色素氧化酶亚基Ⅰ基因(COⅠ)和核基因重组激活基因Ⅱ(Rag2)的系统发育学证据,均支持上述标本为菲氏管鼻蝠(Murina feae)、哈氏管鼻蝠(Mharrisoni)和艾氏管鼻蝠(M ...
张欣 1 钟韦凌 1 吴毅 1 黄正澜懿 1 Gabor CSORBA 2 刘硕 3 王巧燕 4 权锐昌 5 李松 3 余文华 1
doaj
Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
wiley +1 more source
Study on the Species Diversity and Molecular Systematics on the Digenea of Fish in Taiwan Strait [PDF]
摘要 2007年到2008年,作者对台湾海峡鱼类寄生的复殖吸虫作了调查研究,并对复殖吸虫中一些重要的科进行了分子系统学的初步探索。 本次调查共检查鱼类82种,728尾,发现复殖吸虫30种。本文选取了其中的12种进行观察、鉴定和描述。其中包括3个新种、2个未定种、2个福建省首次发现种和7个已报道种,名录如下: 1.直睾合肠吸虫CoitocaecumorthorchisOzaki,1926 2.斯特福足叶吸虫(斯特福肢盘吸虫)PodocotylestaffordiMiller,1941 3 ...
侯金英
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ABSTRACT Background Canine atopic dermatitis (cAD) is a multifactorial, inherited skin disease, estimated to affect ≤ 15% of dogs. Studies of skin messenger mRNA in cAD currently use invasive methods, including blood sampling and biopsy collection, whilst advances in human atopic dermatitis study methodology have demonstrated reliable use of minimally ...
Xavier Langon +5 more
wiley +1 more source
This study reveals a shift in woody plant community assembly from competitive exclusion in early succession to habitat filtering in later stages within karst areas. Environmental distance (80.54%) contributed significantly more than geographical distance (9.95%), providing strong quantitative evidence that niche processes, particularly habitat ...
Hongfen Hu +5 more
wiley +1 more source
近年来,威海一直致力于生态城市的建设。物种多样性是生态城市的重要指标,而在物种多样性中,城市鸟类多样性起着重要的作用。本文调查了冬季威海7个斑块(2个校园和5个典型生活小区)的鸟类多样性,对其物种多样性指数以及均匀度指数进行分析,得出山东大学校园和哈尔滨工业大学校园的鸟类多样性高于5个小区斑块,而且2个校园斑块的均匀度在7个斑块中也处于较高水平。另外,结合实际情况,文章从绿化面积、城市栖息地的空间异质性、生境破碎化程度以及人为干扰4个方面对城市鸟类丰富度与多样性的影响因素做出讨论 ...
高伟 +5 more
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Research on the Community Ecology of Castanopsis fabri Forest in Daiyunshan National Natural Reserve of Fujian [PDF]
罗浮锥(Castanopsisfabri)分布于长江以南各省,为中国亚热带常绿阔叶林的常见树种。在戴云山国家级自然保护区分布有较大面积的罗浮锥天然林,故开展罗浮锥林的研究对于完善福建山地常绿阔叶林的研究具有积极的学术意义。本研究以对福建戴云山国家级自然保护区内永安岩不同海拔高度上的罗浮锥林进行了群落调查,从区系组成、生物多样性、种间关联性、生态位以及群落稳定性几个方面深入分析罗浮锥林,并与闽北万木林自然保护区的罗浮锥林进行比较,分析比较两地罗浮锥林的差异。研究结果如下。 (1)在罗浮锥林全面调查的基础上,
黄文文
core
ABSTRACT Magnesium (Mg)‐based composites are regarded as promising lightweight materials with significant potential for structural applications. The structure–property relationships of bionic Mg‐based composites remain unclear. Herein, three honeycomb‐like Mg‐Fe composites are fabricated to uncover the underlying strengthening mechanisms.
Fan Zhang +5 more
wiley +1 more source
Floristic analysis of seed plants in Wenzhou Area, southeastern Zhejiang, China(温州种子植物区系统计分析)
温州地区位于浙江东南部,地处27°03'~28°36'N,119°37'~121°18'E,独特的地理位置和生态环境令其植物物种多样性较为丰富.基于文献和标本查阅,通过《温州植物志》项目组近6 a的系统调查,编写了《温州野生维管束植物名录》,以此名录为依据对温州种子植物区系进行了统计分析.结果发现:温州地区共有野生种子植物166科,958属,2 460种(不含种下类群),其中裸子植物8科,20属,25种,被子植物158科,938属,2 435种.就科和属所包含的种数而言,寡种科(2~10种)和单种属最多,
XIONGXianhua(熊先华) +6 more
doaj +1 more source

