Results 61 to 70 of about 243 (138)

贺兰山马鹿春季食性分析

open access: yes野生动物学报, 2019
2006—2008年和2016年,在宁夏贺兰山国家级自然保护区,利用粪便显微组织学分析技术并结合痕迹检测法和直接观察法对马鹿阿拉善亚种(Cervus elaphus alashanicus)春季食性进行了研究。从15个沟系中采集马鹿粪便复合样本60个进行分析。结果表明,马鹿春季取食的植物属15科33种(属),食物中各种植物的干重组成比例RD>1%的植物有11种(属),其中小红柳(Salix microstachya var.bordensis)占比41.86%、山杨(Populus davidiana ...
王志勇 1 #孟德怀 2 #骆颖 2 滕丽微 2   +1 more
doaj  

Study on soil seed bank and seedling regeneration of different populations of Amygdalus ledebouriana in wild fruit forest in Tae Basin [PDF]

open access: yes
[Objective] The study aims to investigate the soil seed bank and seedling regeneration characteristics of Amygdalus ledebouriana in Xinjiang, and to explore the limiting factors affecting the population regeneration of A . ledebouriana.
Akejulidezi Nurgailide   +5 more
core   +1 more source

Ultra-structural Changes in Pollen Development of Lycium barbarum L. [PDF]

open access: yes, 2006
用JEM-100CXⅡ透射电子显微镜对宁夏枸杞(Ly cium barbarum L.)花粉发育过程做了超微结构观察.结果表明,在花粉母细胞细线和偶线期,核糖体数量减少、线粒体结构简化;之后核糖体数量逐渐回升,后期Ⅰ线粒体结构恢复正常.小孢子液泡化过程中核糖体再次减少,同时线粒体和质体结构简化;在早期二胞花粉中,核糖体数量增加、线粒体和质体结构再度分化.花粉母细胞和小孢子发育过程中都存在“细胞质改组”现象,且这两次“细胞质改组”与细胞功能的转变密切相关.在次生造孢细胞 ...
徐青, 王仙琴, 田惠桥
core  

Comparison of earthquake monitoring capability of the Ningxia network before and after completion of the early warning project [PDF]

open access: yes
Post the completion of the Ningxia sub-project of the National Earthquake Intensity Quick Report and Early Warning Project, the number and distribution of stations in the Ningxia network have changed greatly.
Hao Tang   +4 more
core   +1 more source

中国狩猎动物 岩羊

open access: yes野生动物学报, 2005
2004年9月,中央电视台的一则新闻引起了我的注意,大意是中国西部野生动物保护成果显著,岩羊数量急剧增加,目前每平方公里分布数量为世界前列。我因此想起了银川中广网4月9日发表的一篇郭长江记者的报道 ...
高桂华, 张立娜
doaj  

阿拉善马鹿冬季肠道菌群组成的性别差异

open access: yes野生动物学报, 2021
肠道菌群对于动物消化及健康有着至关重要的作用,但在性别差异上的研究仍然有限。本研究通过高通量测序技术对贺兰山阿拉善马鹿(Cervus elaphus alashanicus)的20个粪便样本进行多样性分析,雌雄各半,并讨论性别因素对肠道菌群的影响。结果表明,阿拉善马鹿雌雄肠道菌群的多样性及结构均存在差异,且雌性肠道菌群的多样性更高。菌群构成的门水平上,雄性肠道菌群的优势菌门为厚壁菌门(Firmicutes 4947%)和疣微菌门(Verrucomicrobia 1421 ...
于威 李俊乐 滕丽微 刘振生
doaj  

Disaster mechanism and its deposition area of the Xiaochang gully debris flow in Hanyuan County industrial park [PDF]

open access: yes
Influenced by the 2013“4•20” Lushan earthquake, geological disasters occurred frequently along the Baiyan River Basin in Hanyuan County. At present, there is a large amount of loose material sources in the Xiaochang gully, posing a significant risk of ...
Guanglin HUANG   +5 more
core   +1 more source

贺兰山同域分布野生岩羊和阿拉善马鹿全血微量元素分析

open access: yes野生动物学报, 2016
运用电感耦合等离子体质谱法进行检测,对比分析贺兰山同域分布野生岩羊和阿拉善马鹿全血微量元素。实验表明:阿拉善马鹿血和岩羊血其中所含的微量元素在种类和含量上具有相似性。阿拉善马鹿血液中的Fe、Mo、As、Pb、Cd和Cr含量高于岩羊,Cu、Se、Zn含量低于岩羊,Fe差异极显著,Mo、As、Cd差异显著,Cu、Se、Zn、Pb、Cr差异不显著。
颜文斌 扈 花 刘振生 于茹月 门洪生 滕丽微
doaj  

阿拉善马鹿冬季肠道菌群的多样性

open access: yes野生动物学报, 2020
通过高通量测序技术,对采自贺兰山的20只阿拉善马鹿粪便进行测序及菌群多样性分析。结果表明,20个样品共获得1 564 112条序列,有效序列1 399 562条和2 740个OTUs。其中样品包含24个门和283个属,在门水平上核心菌门,分别是厚壁菌门(Firmicutes)76.71%、拟杆菌门(Bacteroidetes)14.16%、变形菌门(Proteobacteria)3.51%。在属水平上,核心菌属有11个,占肠道菌群的31.46%,分别为孢子杆菌属(Sporobacter)7.38 ...
李俊乐 1   +5 more
doaj  

Protective effects of areca nut polyphenols on hypoxic damage of rat pulmonary microvascular endothelial cells. [PDF]

open access: yesZhejiang Da Xue Xue Bao Yi Xue Ban, 2022
He J   +6 more
europepmc   +1 more source

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