Results 41 to 50 of about 2,116 (167)
野生动物学报, 1991 粉红胸鹨（Anthus roseatus）是卧龙自然保护区的夏候鸟,高山草甸的优势种类。笔者自1979年以来,在春季对比鸟的垂直迁移进行了一些观察。1988年春季,又进行专题观察,现报告如下: 观察区概况卧龙自然保护区位于四川盆地向青藏高原过渡的高山峡谷地带;东南低,西北高;最低海拔1 200米,最高海拔6 250米。海拔1 600米以下为山地亚热带常绿阔叶林带;海拔1 600—2 000米为山地暖温带常绿,落叶阔叶林带;海拔2 000—2 600米为山地温带针阔叶混交林带;海拔2 600—3 ...
李洪成
doaj
Functional Ecology, Volume 40, Issue 3, Page 636-654, March 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract The nested subset pattern (nestedness) has been widely used to explain species distributions in island and fragmented systems. Mountain sky islands serve as critical natural laboratories for understanding the evolutionary consequences of geographic isolation and climate
Caiwen Zhang +5 more
wiley +1 more source
Dianci bileiqi, 2018 高海拔下比平原地区气体密度小,放电电压降低。因此,高海拔应增加线路的绝缘强度。在绝缘子串中多采用几片绝缘子来改善绝缘子串电压分布。本文依据架空线路设计规程计算了高低海拔500 kV线路采用U210B瓷质绝缘子应当选取的片数,并依此搭建了高低海拔绝缘子串的等效电路,计算并比较了其电压分布。在高低海拔的等效电路中,通过改变劣化绝缘子的位置和数目,计算劣化绝缘子的电压降,对比分析研究劣化绝缘子对不同海拔电压分布的影响。结果表明:相同情况下,高海拔劣化绝缘子的电压降百分比更大 ...
罗浩 +7 more
doaj
, 2002 The flora of Hong Kong has been well-surveyed since the mid nineteenth century and has had a long history of alien plant invasions. To the present day, more than 2130 wild plant species have been recorded, including 238 species that are probably ...
Corlett, RT, Ng, SC
core
People 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
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Breeding report of a new late-maturing walnut cultivar Dayao No. 1 [PDF]
Dayao No. 1 walnut is a new variety of walnut, characterized by late maturity, high yield, sweet and fragrant flavor, and delicate texture, which was selected and bred from the seedling population of deeply-ribbed walnuts in Yunnan.
LIU Jiao +4 more
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Integrative Conservation, Volume 4, Issue 3, Page 491-502, September 2025.The impact of various restoration strategies on biodiversity and biomass in degraded savannas was evaluated across different elevation gradients. Natural regeneration co‐benefits the increasing in biodiversity and biomass in savannas, while active restoration exhibits altitude‐dependent efficacy and lower biomass accumulation capacity.
Han Zhang +10 more
wiley +1 more source
西藏西北地区藏族人群高同型半胱氨酸血症的患病现状与血尿酸血脂的关联性分析 [PDF]
目的为了了解西藏西北地区藏族人群高同型半胱氨酸血症（HHcy）患病现状及其与血脂、血尿酸等的关联，探讨西藏西北地区高同型半胱氨酸血症等慢性病的防治策略。方法本次调查采用多阶段分层整群随机抽样的方法，对西藏西北地区（阿里地区、那曲市）居住6个月以上、18岁及以上的3 432名藏族居民进行了问卷调查、体格检查以及生化检测等。结果西藏西北地区藏族居民HHcy患病率为75.7%，远高于我国平均人群的患病率（37.2%）。血尿酸、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇是HHcy的危险因素 ...
张玉飞, 熊海, 肖若愚
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Integrative Conservation, Volume 4, Issue 3, Page 476-490, September 2025.The leaf functional traits of angiosperms and gymnosperms in mountain ecosystems significantly influence phyllosphere fungal diversity. These traits are critical for understanding fungal stress resistance and elevational adaptation, which aids in predicting plant responses to climate change.
Xiaocheng Yu +7 more
wiley +1 more source
Study on the Spatial and Temporal Changes of the Vegetation Cover and the Driving Factors in Panzhihua City from 1990 to 2020 [PDF]
[Objective] To investigate the spatial and temporal variations and the driving factors of the vegetation cover in Panzhihua City, and to provide a theoretical basis for Panzhihua City to formulate regional ecological environmental protection programs and
HE Shuqin +3 more
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