Results 1 to 10 of about 1,078 (114)
Kongjian kexue xuebao, 2023 利用张衡一号卫星搭载的电场探测仪（Electric Field Detector，EFD）获得的VLF频段2019年电场功率谱数据，研究赤道附近区域近东西向电场的背景分布、季节变化以及与电离层背景的关系。结果表明：白天电场背景在赤道及其附近随季节呈不同波形结构，以3波、4波为主；夜间电场背景规律性稍差，仍呈随季节变化的经向波形结构分布特征；白天电场背景与电离层背景的季节变化呈高度正相关性，春秋季为峰值；夜间电场背景的季节变化特征是夏冬季峰值，与夜间电离层背景整体上呈负相关性 ...
何 宏玮 +5 more
doaj +1 more source
Dizhen xuebao, 2021 选取四川省数字测震台网2015年1月1日至2018年12月31日期间60个固定台站的三分量连续波形记录，计算了台站噪声加速度功率谱密度及相应的概率密度函数分布，统计了不同频率下的噪声功率谱密度值分布，对不同区域、不同频率下背景噪声水平的变化特征予以分析。结果表明：大部分地震台站的高频段噪声由于受到台站附近人为的、规律的作息生活和生产方式的影响，呈现明显的季节性变化和日变化，即夏季噪声水平升高，冬季降低，在农历春节期间达到全年最低值，地理空间分布特征不明显；第二类地脉动冬季噪声水平升高，夏季降低 ...
Jiangtao Xie +3 more
doaj +1 more source
野生动物学报, 2021 为探究昭通绒鼠（Eothenomys olitor）体重和产热特征的季节性变化，对其夏季和冬季的体重、体脂重量、摄食量、静止代谢率（RMR）、非颤抖性产热（NST）、血清瘦素质量浓度、内脏器官和消化道重量、肝脏和褐色脂肪组织（BAT）中的生化指标以及下丘脑神经肽Y（NPY）、刺鼠相关蛋白（AgRP）、阿片促黑色素原（POMC）和可卡因-安他非明转录调节肽（CART）基因表达量进行测定。结果显示：昭通绒鼠夏冬两季体重差异不显著，但体脂重量夏季较高，冬季较低；摄食量、RMR和NST均是冬季高于夏季 ...
杨押佐 1 贾婷 2 张浩 1 王政昆 1 朱万龙 1
doaj
Shuitu Baochi Xuebao, 2021 为明确黄河干流头道拐水文站水沙运动过程、变化趋势及运动状态特征，以2006—2018年黄河干流头道拐水文站水沙数据为基础，基于累积距平法、R/S极差分析法、河道来沙系数与不协调度等研究方法，对头道拐水文站水沙运动过程进行系统分析。结果表明：头道拐水文站年际间径流与输沙量和年内月均径流与输沙量变化趋势均呈现良好的一致性，但两者的季节性差异特征显著，且输沙量的显著性较径流更突出；冬季径流与输沙量变化趋势同步性相比其他季节较差 ...
赵水霞 +6 more
doaj
Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, EarlyView.Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
wiley +1 more source
Journal of Animal Ecology, Volume 95, Issue 7, Page 1178-1193, July 2026.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2000 应用压力室技术对晋西北７个乡土造林树种的水分参数进行了研究，分析了各树种的抗旱性及其季节变化规律。结果表明：（１）各树种抗旱性具有一定的季节变化格局，根据本地区气候变化特征，其基本规律是：生长季初期最弱，炎热干旱的季节有所增强，降水峰期再次减弱，而到生长季末期则是一年中抗旱性最强的时期。（２）应用抗旱性综合指标判定７个树种抗旱性强弱，其顺序依次为：山杏，海红，榆树，刺槐、沙刺，红柳，沙枣。（３ ...
柴宝峰 王孟本
doaj +2 more sources
Integrative Conservation, Volume 5, Issue 2, Page 225-235, June 2026.This study used camera trap data from 6 years between 2016 and 2021 and generalized linear mixed models to explore the factors that influence the spatial density distribution of lynx and its prey populations in warm and cold seasons in Inner Mongolia Hanma National Nature Reserve, China.
Wentao Zhang +11 more
wiley +1 more source
Functional Ecology, Volume 40, Issue 6, Page 1878-1891, June 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao +8 more
wiley +1 more source
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Prioritization in conservation is crucial for the development of efficient and effective decision‐making policies. For many decades, the importance of some species and their habitats has been assessed and applied in conservation legislation, but bats and their diurnal roosts have ofbeen overlooked.
David López‐Bosch +6 more
wiley +1 more source