Results 21 to 30 of about 4,188 (210)

三峡水库水环境与水生态研究的进展与展望 [PDF]

open access: yes, 2012
伴随着举世瞩目的三峡工程全面竣工,三峡水库于2010年正式进入年水位落差达30 m的正常运行阶段.水库湖沼学可为环境友好型大坝建设和水库可持续管理提供科学依据.本文在三峡成库8 a以来生态系统长期监测与研究的基础上,对三峡水库水环境现状进行了归纳和总结,分析了水环境动态的时空异质性、水库纵向分区与群落组成、垂向分布及藻类水华的成因和动态,并对三峡水库藻类水华预警与生态-水文调控机制展开了论述.最后,本文尝试给出以下两方面的展望:1)大型水库湖沼学观测研究应有长期的策略;2 ...
孙志禹, 蔡庆华
core  

Diagnosing scaling bottlenecks in 10 community conservation initiatives in southern and eastern Africa

open access: yesConservation Biology, EarlyView.
Scaling area‐based conservation, including initiatives led or comanaged by Indigenous Peoples and local communities, is a flagship goal of the Kunming‐Montreal Global Biodiversity Framework. Conservationists often aspire to scale initiatives, but this is rarely achieved in practice. Identifying and addressing factors that limit initiative adoption (i.e.
Thomas Pienkowski   +39 more
wiley   +1 more source

支持流量疏导弹性光网络的共享保护策略

open access: yesGuangtongxin yanjiu, 2015
针对支持流量疏导的EON(弹性光网络),提出了一种改进的共享保护策略。改进策略针对不同粒度级别(如光隧道级和低速子载波级)的路径进行分级的共享保护,以保证对网络中隧道级路径进行隧道级保护。仿真结果表明,文章所提保护算法比传统的共享保护算法在阻塞率及资源利用率方面都有明显改善,其中业务阻塞率最大降低了0.47;在保护带G为16个频隙的情况下,资源利用率可节约10.95%。
贾晓蕾, 沈建华
doaj  

原生态民俗体育传承的现状与对策 [PDF]

open access: yes, 2010
原生态民俗体育是我国优秀传统文化重要的组成部分,然而随着经济文化的发展原生态民俗体育传承中,面临着政府部门实施力度薄弱、参与人群文化认同感减弱、中坚承传后备人才的储备不足的困境,应以事实为依据有针对性地提出相应的建设性保护对策,为原生态民俗体育的传承创造良好的环境 ...
翟会会
core  

Use of species’ responses to cryptic anthropogenic disturbances for monitoring biodiversity outcomes in tropical forests

open access: yesConservation Biology, EarlyView.
Abstract Measuring area‐based conservation outcomes in tropical forests is challenging due to cryptic human disturbances (e.g., hunting). As a result, comparative studies of management strategies providing quantitative outcomes remain scarce, especially in the Neotropics.
Lucy Perera‐Romero   +5 more
wiley   +1 more source

肺保护通气对急性呼吸窘迫综合征患者的疗效及对右心功能的影响

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2018
【目的】探讨肺保护通气策略对ARDS患者的疗效及对右心功能的影响。【方法】选取2016年1月至 2017年6月在我院重症医学科住院的ARDS患者共52例,年龄(48±7)岁。将所有患者随机分为对照组(24例)和 肺保护组(28例),其中对照组采用潮气量8~15 mL/kg标准体质量,PEEP 4~8 cmH2O,平台压30~35 cmH2O;肺 保护组采用潮气量6 mL/kg 标准体质量,PEEP 采用ARDSNET 滴定法(PEEP-FiO2 表)进行设置,平台压<30 cmH2O ...
刘映霞, 陈培锦
doaj  

Study on the Environmental Impact Assessment System in Areas beyond National Jurisdiction [PDF]

open access: yes, 2014
随着全世界人口的不断增长,陆地资源的不断耗竭,陆地空间已经无法满足人类的发展需要,人类的生存与发展越来越依赖于海洋,世界各国纷纷把目光投向了海洋。另外,随着科学技术的不断发展,人类开发利用海洋的能力得到了显著的提高,人类在海洋的足迹开始从近岸浅海延伸向大洋深处。进入21世纪,人类开发利用海洋的程度达到了前所未有的高度。由于人类活动的增加,海洋环境、海洋生物及其生态系统正承受着巨大的压力。伴随着人类在国家管辖范围以外区域活动的增加,国际社会开始关注国家管辖范围以外区域的海洋生物多样性保护问题 ...
麻德强
core  

Success of restoration strategies in preventing extirpation of 2 critically endangered coral species

open access: yesConservation Biology, EarlyView.
Abstract An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected.
Erinn M. Muller   +29 more
wiley   +1 more source

广东象头山国家级自然保护区的现状及保护对策

open access: yes野生动物学报, 2008
象头山自然保护区是以保护珍稀濒危野生动植物物种及南亚热带季风常绿阔叶林森林生态系统为主要保护对象的国家级自然保护区。本文从象头山自然保护区的自然资源状况、建立保护区重要性、机构设置及管理现状等方面进行了阐述和分析,提出了保护区存在的问题及今后发展的保护管理对策。
秦清双
doaj  

Hobbyist preferences for pet freshwater turtles

open access: yesConservation Biology, EarlyView.
Abstract The burgeoning pet trade is a primary threat to wild freshwater turtles worldwide. Although the risks from commercial exploitation of turtles have been discussed widely, there is little empirical research on preferences for pet turtles from a hobbyists’ perspective.
Jingjing Zhao   +7 more
wiley   +1 more source

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