Results 21 to 30 of about 5,755 (166)

Ecological safety assessment of egrets in Xiamen National Nature Reserve [PDF]

open access: yes, 2006
[摘要]:白鹭的生态安全是指白鹭所处的生态系统能够维持白鹭种群持续生存的需求和条件, 其中关键是白鹭生境的安全。白鹭 生境安全从根本上取决于生境的适宜性和人为对生境的干扰程度, 又可以理解为生境受到人类干扰后所能保持的生态适宜性。 分别选择白鹭在厦门的2 个主要繁殖栖息生境 大屿岛和鸡屿岛和10 个代表性觅食生境为研究对象, 对白鹭生境的生态适 宜性和人为干扰程度进行分别评价。其中, 生境适宜性评价采用指标体系法, 通过赋值、计算进行评价; 人为干扰程度评价主要 依靠地理信息系统分析方法 ...
HONG Hua Sheng   +7 more
core  

Robust metrics for quantifying and comparing resistance and recovery in experimental studies

open access: yesMethods in Ecology and Evolution, Volume 17, Issue 1, Page 6-14, January 2026.
Abstract Various indices have been developed to experimentally quantify resistance and recovery (two components of engineering resilience) in response to anthropogenic and natural disturbances. This diversity complicates the selection of appropriate metrics for comparing resilience across ecosystems and studies.
Zewei Zhuang   +2 more
wiley   +1 more source

人扁桃体细胞干扰素治疗单疱角膜炎(37例39眼临床疗效观察)

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1984
单疱病毒角膜炎易于复发,已成为常见的严重致盲眼病。目前使用的抗单疱药物均有一定的毒性,加上耐药病毒株的产生,因而降低了它们的临床使用价值。人们从实验研究知道,人类炮疹病毒对人干扰素极为敏感。干扰素由于抗病毒谱广而毒性小,成为颇受注意的一种新药。自从Jones(1962)报告用猴干扰素治疗人单疱角膜炎有效以后,国外陆续有文献报告用人白细胞干扰素治疗单疱角膜炎的研究结果。国内近年也开展干扰素的研制及临床治疗单疱角膜炎的观察,但报告尚少 ...
冯春茂
doaj  

Identifying priority areas for conservation to promote connectivity and mitigate the impacts of anthropogenic disturbance

open access: yesConservation Biology, Volume 39, Issue 6, December 2025.
Abstract As nations seek to expand protected area (PA) networks to cover 30% of land and seas by 2030 (30×30), there is an urgent need for systematic conservation planning and spatial prioritization that considers the broad range of ecological and socioeconomic factors influencing the persistence of biodiversity.
Edmond Sacre   +2 more
wiley   +1 more source

春季人为干扰活动对扎龙湿地 鸟类群落结构影响的初步研究

open access: yes野生动物学报, 2008
根据扎龙湿地实际情况,将其划分为3种人为干扰强度地区,并进行了鸟类群落结构调查。统计3种干扰地区的物种丰富度,用Shannon-Winener指数计算物种多样性指数,用Pielou指数式计算物种均匀度指数,并用数量数据的β多样性测度公式分析人为干扰强度对扎龙湿地鸟类群落结构的影响。结果表明扎龙湿地鸟类的物种丰富度、物种多样性和物种均匀度与人为干扰强度成紧密的负相关关系。
杨敏, 吴庆明, 齐锐, 孔维尧
doaj  

Design and Implementation of Human Resource Management System for Small and Medium-sized Company [PDF]

open access: yes, 2015
纵观各中小企业在人力资源方面的管理,可以发现普遍存在工作效率低下、人为干扰因素多、办公软件不方便等问题,比如其中的工资录入,计算、合计等需要通过大量的手工完成,数据量多,处理速度慢,而且极易出错,导致工作效率低。 为了加强对中小企业人力资源的管理,避免造成人力资源在工作中的浪费,本文针对中小企业人力资源日常管理中存在的问题,以VisualStudio软件为平台,基于C#技术,设计了中小企业人力资源管理系统并实现了对中小企业人力资源的管理,符合中方小企业的需求,其主要研究内容如下: 1 ...
黄雁西
core  

Traditional knowledge promotes the protection of large old trees: A case from China's richest biocultural diversity area

open access: yesPeople and Nature, Volume 7, Issue 11, Page 2700-2713, November 2025.
Abstract Large old trees are important ecological entities in human settlements, providing cultural values and ecological services that are threatened by current and future changes in global climate, land use and disturbance regimes. Some studies suggest incorporating social and cultural significance into the conservation of large old trees.
Zhuo Cheng   +5 more
wiley   +1 more source

扎龙保护区景观动态变化与丹顶鹤人为干扰分析

open access: yes野生动物学报, 2014
以2000年、2007年、2013年3期Landsat TM遥感影像为主要数据源,结合辅助资料对扎龙保护区进行提取,在Erdas的支持下实现图像解译,分析景观变化。结果显示,2000~2013年,扎龙保护区沼泽湿地面积先减后增,但仍以沼泽为基质景观,沼泽面积受自然因素的影响很大; 草地景观有所减少,耕地面积小幅度增加; 明水面面积变化较大,主要受降水影响。以道路、居民地、耕地作为人为干扰源,选择适合的干扰距离对三者进行缓冲分析,探究人为干扰对丹顶鹤生境的影响程度。结果表明:人为干扰逐年加大 ...
龙泽旭 龚文峰 袁 力 李 浩
doaj  

人为干扰对生物多样性的影响 [PDF]

open access: yes, 2001
[中文文摘]从景观破碎、保护历史、种群行为机制和种群大小4个方面讨论了人为干扰对生物多样性的影响,以期为生物多样性保护和生态环境恢复提供依据。一般人为轻度干扰会导致生物多样性提高,对比研究武夷山人为干扰甜槠林与郁闭稳定甜槠林结果表明,人为干扰甜槠林高等植物物种丰富度相对于郁闭稳定林分提高了76.32%;但人为干扰甜槠林的群落优势度却远低于郁闭林,故在演替过程中群落物种多样性的增加是生态系统对外界轻度干扰的一种适应,是恢复生态系统稳定性的一种对策,一旦干扰超过其调节能力,将难以恢复为原来的群落类型 ...
李振基, 樊正球, 陈鹭真
core  

Development and Application Value Assessment of a Method for Measuring the Quality of Volume Calibration Syringes [PDF]

open access: yes, 2022
BackgroundPulmonary examination is a measurement technique in medicine, and the quality of examination equipment is a key factor associated with the accuracy of examination results.
WU Zhongping, HUANG Ruibo, ZHENG Jinping, GAO Yi
core   +1 more source

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