Results 31 to 40 of about 222,494 (166)

Cardiac adaptation to high altitude in the plateau pika (Ochotona curzoniae). [PDF]

Physiol Rep, 2013
The aim of this study was to assess maximal heart rate (HR) and heart morphological changes in high altitude living "plateau pikas" and rats bred at 2260 m. Rats and pikas were catheterized to measure HR (2260 m). After baseline measurements, 1 mg/kg of atropine (AT) and increasing doses of isoproterenol (IsoP) (0.1, 1, 10, and 100 μg kg) were injected
Pichon A, Zhenzhong B, Marchant D, Jin G, Voituron N, Haixia Y, Favret F, Richalet JP, Ge RL.   +8 more
europepmc   +4 more sources

Metagenomic Comparisons between Soft and Hard Feces of Plateau Pikas (Ochotona curzoniae) [PDF]

Animals, 2022
The division of hard and soft feces is an effective digestion strategy in the order Lagomorpha. Although previous studies have reported that hard and soft feces differ in morphology and component, the discrepancy in the microbiome remains unclear. This study explored the microbiomes of hard and soft feces in plateau pikas by sequencing the V3 and V4 ...
Haibo Fu, Wenjing Li
openaire   +3 more sources

Dynamics of Suitable Habitats for Typical Predators and Prey on the Qinghai‐Tibet Plateau Driven by Climate Change: A Case Study of Tibetan Fox, Red Fox, and Plateau Pika [PDF]

Ecology and Evolution
The Qinghai‐Tibet Plateau (QTP) is a biodiversity hotspot highly sensitive to global climate change. The Tibetan fox (Vulpes ferrilata), red fox (V.
Jingjie Zhang, Feng Jiang, Hongmei Gao, Haifeng Gu, Pengfei Song, Tongzuo Zhang   +5 more
doaj   +2 more sources

Habitat Utilization Preference by Small Mammals Is Associated With Geomorphic and Soil Properties: A Case Study of the Plateau Pika From the Eastern Qinghai-Tibet Plateau. [PDF]

Ecol Evol
This study, through a large‐scale survey, reveals a close relationship between plateau pika habitat use preferences and geomorphic and soil characteristics. The findings indicate that pikas prefer flat, sun‐facing terrain near water sources, as well as specific ranges of soil depth, organic matter, and moisture.
Qin F, Chen Y, Tang Z, Oosthuizen MK, An S, Wei W.   +5 more
europepmc   +2 more sources

Species-Level Taxonomic Characterization of Uncultured Core Gut Microbiota of Plateau Pika

Microbiology Spectrum, 2023
Rarely has the vast diversity of bacteria on Earth been profiled, particularly on inaccessible plateaus. These uncultured microbes, which are also known as “microbial dark matter,” may play crucial roles in maintaining the ecosystem and are linked to ...
Ji Pu, Jing Yang, Shan Lu, Dong Jin, Xuelian Luo, Yanwen Xiong, Xiangning Bai, Wentao Zhu, Yuyuan Huang, Shusheng Wu, Lina Niu, Liyun Liu, Jianguo Xu   +12 more
doaj   +1 more source

Autonomous UAV Detection of Ochotona curzoniae Burrows with Enhanced YOLOv11

Drones
The Tibetan Plateau is a critical ecological habitat where the overpopulation of plateau pika (Ochotona curzoniae), a keystone species, accelerates grassland degradation through excessive burrowing and herbivory, threatening ecological balance and human ...
Huimin Zhao, Linqi Jia, Yuankai Wang, Fei Yan   +3 more
doaj   +2 more sources

Transcriptome analysis of pika heart tissue reveals mechanisms underlying the adaptation of a keystone species on the roof of the world

Frontiers in Genetics, 2022
High-altitude environments impose intense stresses on living organisms and drive striking phenotypic and genetic adaptations, such as hypoxia resistance, cold tolerance, and increases in metabolic capacity and body mass. As one of the most successful and
Danping Mu, Danping Mu, Xinlai Wu, Xinlai Wu, Anderson Feijó, Wei Wu, Zhixin Wen, Jilong Cheng, Lin Xia, Qisen Yang, Wenjuan Shan, Deyan Ge   +11 more
doaj   +1 more source

Neisseria chenwenguii sp. nov. isolated from the rectal contents of a plateau pika (Ochotona curzoniae). [PDF]

Antonie Van Leeuwenhoek, 2019
Two Gram-stain negative, catalase positive, coccus shaped bacteria, designated 10023T and 10010, were isolated from the rectal contents of a plateau pika (Ochotona curzoniae) in Qinghai-Tibet Plateau, China. Based on 16S rRNA gene sequence analysis, phylogenetic trees showed that these two isolates (10023T, 10010) group with members of the genus ...
Zhang G, Yang J, Lai XH, Lu S, Jin D, Pu J, Bai X, Luo X, Xiong Y, Huang Y, Chen C, Xu J.   +11 more
europepmc   +4 more sources

Identifying Conservation and Conflict Zones for Tibetan Brown Bears Under Climate Change Through Integrated Habitat and Prey Modeling on the Qinghai-Tibet Plateau. [PDF]

Ecol Evol
This study evaluates the future habitat dynamics of the Tibetan brown bear on the Qinghai‐Tibet Plateau under climate change by integrating predator–prey relationships and environmental variables using the MaxEnt model. Results show significant habitat contraction and shifting patterns, increasing the risk of human‐bear conflict.
Sun Q, Wanghe K, Dai Y.
europepmc   +2 more sources

Seasonal Variations in the Foraging Strategies of Plateau Pikas (<i>Ochotona curzoniae</i>). [PDF]

Animals (Basel)
This study investigates the foraging habits and dietary niche characteristics of plateau pikas (Ochotona curzoniae) by analyzing differences between the cold and warm seasons using stable isotope analysis of carbon and nitrogen in liver, muscle, and fur organs. The results indicated that in the cold season, the plant species incorporated into different
Dong L, Cai X, Gan R, Zhang J, Dong R, Dong K, Hua L, Zhou R.   +7 more
europepmc   +4 more sources