Results 21 to 30 of about 5,313 (178)
2006~2008年的冬季,在黑龙江省完达山东部林区,利用布设样线的方法对东北兔生境选择进行了研究。通过生境选择指数分析表明,东北兔主要选择中坡位、阳坡、坡度小于25度、离人为干扰距离大于1000m的针阔混交林和灌丛生境;主成分分析表明,隐蔽条件、食物、温度和人为干扰是影响东北兔生境选择的主要生境因子。
任梦非, 黄海娇
doaj
Abstract In the digital sovereignty debate, countries and blocks seek to build technological and regulatory capacity to ascertain technological autonomy—definitions notwithstanding. Meanwhile, these actors seek to position themselves discursively, differentiating their own understanding of digital sovereignty from that of competing powers.
Riccardo Nanni+2 more
wiley +1 more source
分别于2008年4~5月和2009年4~5月,在龙口自然保护区对黑熊春季生境选择进行了研究,野外工作共设置87个10 m×10 m样方,并调查12个生态因子,其中利用样方41个,对照样方46个。通过Vanderploeg &Scavia选择指数得到,黑熊喜爱选择处于高海拔(>450 m)、上坡位有石砬子且草本盖度适中(10%~40%)的生境,倾向选择乔木密度高(>10株/100 m2)、郁闭度大(>40%)、灌木密度较低(30°)且向阳的针阔混交林。主成分分析与资源选择函数分析共同得到海拔、坡度、坡位 ...
陈洋, 夏茜, 王文, 沈广爽
doaj
Using positionality and reflexivity to support equity in partnership‐driven research
Abstract Social and economic position and power shape everyone, including scientists and researchers. The way researchers do conservation science and the voices centered in the process are a result of researcher upbringing, experiences, access to resources, and values and are a manifestation of positionality.
Rachael Cadman+8 more
wiley +1 more source
本文介绍了资源选择函数的原理与方法,并应用在丹顶鹤对巢址生境的选择和利用研究中。研究影响丹顶鹤巢址生境选择的关键因子是人为干扰距离; 次关键因子是植被密度、植被高度、明水面距离及植被直径; 而剩余苇丛距离、剩余苇丛面积、剩余苇丛高度和巢周围水深对丹顶鹤巢址生境选择的影响并不明显。丹顶鹤的生境资源选择函数为:Logit(p)=-2.409+4.226×植被高度+1.835×植被直径+2.416×植被密度-5.023×人为干扰距离+2.009×明水面距离 ...
邹红菲 高忠斯 吴庆明 黄华智 李全亮 陶 蕊 杨宇博
doaj
Institutional fit and policy design in water governance: Nebraska's Natural Resources Districts
Abstract The extent to which rules in a governing arrangement addresses its local conditions is usually defined in the environmental governance literature as the problem of fit. Actors in governing arrangements with decision‐making authority are capable of choosing and designing specific policy tools in order to address specific policy problems.
Tomás Olivier, Sechindra Vallury
wiley +1 more source
野生动物的生境可能会在时间和空间上发生变化。在某一地区,各种生境所占比例的变化,可能引起该地区野生动物对整个生境适宜性的改变。因此,需要一个预测野生动物对生境变化所产生反应的生境关系模型(Verner et al, 1986)。本文根据野生动物短期的生境利用和野生动物管理中收集到的有关资料,提出了一种预测生境变化对野生动物影响的方法。生态学上关于生境选择理论是以种群密度大小表示生境质量好坏为前提的。故根据生境利用以及有关资料,便能直接地预测生境变化的结果。一、理论基础 ...
Robert Fagen, 张明海, 陈丽娟
doaj
Social participation challenges and response strategies identified by adults aging with a disability
Abstract Social participation is likely to decrease among older adults as disability levels increase. However, it is a modifiable determinant of health that can impact older adults' well‐being and quality of life. Thus, this secondary data analysis aimed to understand what challenges older adults aging with a mobility or vision disability face with ...
Maurita T. Harris, Wendy A. Rogers
wiley +1 more source
Natural training enclosure design schematic. We selected 12 sika deer including six adults and six sub‐adults. Key considerations in the design of the natural training were to divide the training spatial ground into two parts (30 × 30 m small areas for isolation of new individuals and large areas measuring 200 × 600 m for free walking), and the ...
Wentao Zhang+10 more
wiley +1 more source
2007年和2008年9~10月,在宁夏六盘山国家级自然保护区采用样带法对环颈雉的栖息地选择进行了研究。共测定了31条样带上的91个环颈雉栖息地利用样方和100个任意样方的12个生态因子。结果表明环颈雉偏好利用草原和草甸,避免选择其他4种植被类型;偏好利用无树的生境,随机利用以桦和椴为优势乔木的生境,避免其他4种优势乔木的生境;偏好位于阳坡的生境,随机利用半阳坡和半阴坡的生境,避免利用阴坡的生境;偏好选择下坡位的生境,随机选择中坡位的生境,避免选择上坡位的生境。对利用样方和任意样方进行Mann ...
程晓福, 殷小慧
doaj