Results 41 to 50 of about 19,875 (213)

Island Ecosystem Assessment:A Case Study of Baishashan Island in Zhoushan, Zhejiang Province [PDF]

open access: yes, 2015
我国是海洋大国,岛屿众多,海岛是我国国土的重要组成部分,海岛蕴藏着极为丰富的生物、矿物、能源、港口、旅游、生态环境资源等,海岛地理位置特殊,在维护国家领土完整、维护海洋权益等关系到民族生存与发展等方面具有不可估量的社会、经济、科研、生态和政治及军事价值。近年来,国家高度重视海岛开发与保护,对海洋强国、海洋战略、海洋产业、海洋资源作出了一系列决策部署。 目前我国在海岛开发、保护和管理中存在诸多问题,许多海岛开发是在未开展生态调查,缺乏开发规划的情况下开展的,导致海岛生态系统遭受破坏或生态功能下降 ...
王丰
core  

Conservation Funding at the Local Level 地方层面的保护资金

open access: yesWildlife Letters, EarlyView.
Direct conservation fund transfer to local communities ensures the involvement of these communities in decision‐making and fund utilisation, which will ultimately lead to effective biodiversity conservation. A Cakchiquel family in the hamlet of Patzutzun, Guatemala, 1993. Credits: John Issac. Source: UNEP‐WCMC Internal Resources.
Jithu K Jose
wiley   +1 more source

国外保护野生动物法规简介

open access: yes野生动物学报, 1989
一、国外保护野生动物的立法为了保护野生动物,世界上许多国家制定了保护野生动物的综合性法律,如:罗马尼亚、蒙古、联邦德国颁布“狩猎法”,苏联颁布“动物界保护和利用法”,泰国颁布“野生动物保存保护法”,匈牙利颁布“森林和野生动物法”,日本颁布“鸟兽保护和狩猎法”,澳大利亚颁布“国家公园和野生动物法”。有的国家还制定了一部分野生动物或特定野生动物的专门法律,如:美国制定有“濒危物种法”,“海洋哺乳动物保护法”、“迁徙鸟类保护法”、“海豹保护法”、“鲸类保护法”、“秃鹰和金鹰保护法”,澳大利亚制定“鲸类保护法”
徐军, 王洪杰
doaj  

Research on Sand Dumping Detection of Harbor Dredging Based on Signal Enhancement and Feature Extraction [PDF]

open access: yes, 2016
随着海洋经济发展,各国对港区建设和航道维护愈加重视。但是,在利益驱使下,疏浚驳船常常在非指定区倾倒泥沙,导致航道内泥沙淤积甚至断航,航道维护成本增加和生态坏境破坏。目前,国内普遍采用安装摄像头、吃水线检测等监控方法,但易受人为破坏和环境因素的影响无法获得好的效果。国外采用更改倾倒区和自然处理的手段并不适用于我国流域众多的国情。因此,航道管理部门急需一种非接触式、稳定可靠的监控手段,以保证疏浚工程作业的质量。 本文根据混浊海水声吸收的原理,周期性地发送和接收Chirp探测信号 ...
钟张婷
core  

A Case Report on Rehabilitation of the Asiatic Black Bear (Ursus thibetanus ussuricus) in the Wild 亚洲黑熊 (Ursus thibetanus ussuricus) 野外放归野化案例报告

open access: yesWildlife Letters, EarlyView.
Asiatic black bears in Russia face conservation threats such as habitat destruction and fragmentation, which exacerbate food shortages caused by crop failures. This study explores an innovative approach to rehabilitating bears that abandon hibernation in mid‐winter due to extreme exhaustion by providing supplemental food near their den sites.
Sergey A. Kolchin   +2 more
wiley   +1 more source

人工饲养环境下长江江豚的行为谱的构建 [PDF]

open access: yes, 2005
对行为的定义和描述是定量开展行为学研究的前提与基础。通过对人工饲养环境下长江江豚行为的观察、记录和分析,定义和描述了长江江豚近40种行为。在此基础上,初步构建了人工饲养环境下长江江豚行为学研究所必需的行为谱,由活跃的水面行为、玩耍、索食、社群行为、性行为、休息、摩擦、杂类八个类别组成 ...
肖建强,王丁
core  

Changes of Potential Suitable Areas for Lynx Under Climate Change in Mohe Area, Daxing'anling Mountains, China

open access: yesWildlife Letters, EarlyView.
Climate change drives shifts in suitable habitats for Eurasian lynx and its prey (hare, roe deer) in Mohe, Daxing'anling Mountains. Under RCP scenarios, moderate warming (RCP4.5) promotes substantial habitat expansion, while high‐emission conditions (RCP8.5) lead to strong expansion in the 2050s but slower gains and partial contraction by the 2070s ...
Binglian Liu   +5 more
wiley   +1 more source

A survey of protection consciousness on sharp instrument injury of practcing nursing students

open access: yesHuli yanjiu, 2005
[目的]了解实习护生被锐器损伤的情况,为采取职业防护措施提供科学依据。[方法]采用问卷法调查183名实习护生锐器损伤的发生率和防护行为。[结果]97.3%的实习护生有锐器伤的经历,其中锐器损伤和安瓿玻璃割伤占首位。实习护生缺乏锐器伤的防护意识。[结论]实习护生要充分认识到锐器伤防护的重要性,增强锐器伤的防护意识,同时要加大职业防护的管理,以减少锐器伤的危害。
张金华, 李秀敏, 许丽莉
doaj  

Kinases Mst1 and Mst2 positively regulate phagocytic bactericidal activity [PDF]

open access: yes, 2015
致病菌引发的恶性化脓和不可控感染一直是临床治疗的一项棘手难题。当细菌侵入后,天然防御细胞如巨噬细胞、嗜中性粒细胞等立即响应,识别并吞噬致病菌的同时调动胞内线粒体和NADPH氧化酶向吞噬泡内释放大量的活性氧(ROS),进而实现杀伤和清除细菌的功能。当这类细胞不能充分发挥杀伤和清除病原体的功能时,即使入侵的细菌数量较少或是致病力不强,也可能诱发机体破损部位或组织器官产生脓肿溃烂、炎症因子风暴和组织坏死,最终导致败血症或致死性脓毒性休克 ...
耿晶
core  

Lessons learned from screening potential other effective area‐based conservation measures

open access: yesConservation Biology, EarlyView.
Abstract Other effective area‐based conservation measures (OECMs) are sites that deliver effective biodiversity outcomes irrespective of their management objectives. These areas are widely expected to play an important role in efforts to protect 30% of Earth by 2030.
Carly N. Cook   +15 more
wiley   +1 more source

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