Results 51 to 60 of about 1,893 (167)

An Automatically Initialized Level Set Method for Ochotona Curzoniae Image Segmentation

IOP Conference Series: Earth and Environmental Science, 2021
Abstract In order to effectively solve this problem that that the traditional level set method needs to mark the initial contour manually, a novel method that automatic initialization by utilizing deep learning is proposed in this paper.
Haiyan Chen, Huaqing Zhang
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Influences of Vegetation Coverage and Rodent Mounds on Topsoil Particle Characteristics of Alpine Grassland

Shuitu baochi yanjiu, 2023
[Objective] The aim of this study is to explore the variation characteristics of topsoil particle size composition in the alpine grassland in the source region of the Yellow River, as well as main influencing factors on soil degradation in the grassland,
ZHAI Hui, LI Guorong, LI Jinfang, TONG Shengchun, ZHAO Jianyun, ZHU Haili, LIU Yabin, LI Xilai, HU Xiasong   +8 more
doaj  

Agromyces badenianii sp. nov., isolated from plateau pika (Ochotona curzoniae)

International Journal of Systematic and Evolutionary Microbiology, 2020
Two aerobic, Gram-stain-positive, catalase-positive, non-motile and rod-shaped bacterial strains, designated MF30-AT and MF845, were isolated from the intestinal contents of plateau pika collected from the Qinghai–Tibet Plateau. Optimal growth of these two strains was observed under aerobic conditions at pH 7.0 and 28 °C. The 16S rRNA gene sequences of
Junqin Li, Shan Lu, Dong Jin, Jing Yang, Xin-He Lai, Fei Mi, Dezhu Zhang, Gui Zhang, Zhi Tian, Kui Dong, Sihui Zhang, Wenjing Lei, Ji Pu, Xiaomin Wu, Ying Huang, Zhihong Ren, Suping Wang, Jianguo Xu   +17 more
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Emergence of an ancient and pathogenic mammarenavirus

Emerging Microbes and Infections, 2023
Emerging zoonoses of wildlife origin caused by previously unknown agents are one of the most important challenges for human health. The Qinghai-Tibet Plateau represents a unique ecological niche with diverse wildlife that harbours several human pathogens
Xue-Lian Luo, Shan Lu, Chuan Qin, Mang Shi, Xiao-Bo Lu, Lu Wang, Sang Ga, Dong Jin, Xin-Li Ma, Jing Yang, Yan Dai, Lin-Lin Bao, Yan-Peng Cheng, Ya-Jun Ge, Yi-Bo Bai, Wen-Tao Zhu, Ji Pu, Hui Sun, Yu-Yuan Huang, Ming-Chao Xu, Wen-Jing Lei, Kui Dong, Cai-Xin Yang, Yi-Fan Jiao, Qi Lv, Feng-Di Li, Jianguo Xu   +26 more
doaj   +1 more source

Can pikas hold the umbrella? Understanding the current and future umbrella potential of keystone species Pika (Ochotona spp.)

Global Ecology and Conservation, 2022
The umbrella species concept is a frequently used concept in conservation since the conservation of an umbrella species may benefit other species. Keystone species are often suggested as potential umbrella species, but the validity of this approach ...
Ojaswi Sumbh, Anouschka R. Hof
doaj   +1 more source

Architecture Characteristics of Burrow System of Plateau Pika, Ochotona curzoniae

Pakistan Journal of Zoology, 2018
Burrows serve many functions for animals by providing a place for rearing young, sleeping, hibernation, food storage, protection from predators and extreme environment, and the function of burrows varies with the degree of burrow complexity. We studied the burrow architecture (length, internal dimensions, fractal dimension of tunnel systems, number of ...
Wanrong Wei, Weiguo Zhang
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Decades of Enclosure Protection Exert Composite Effects on Grassland Grasshopper Communities

Integrative Zoology, EarlyView.
Decades of enclosure protection have altered grasshopper community structure, with species‐specific effects on population dynamics. For the low‐mobility grasshopper Chorthippus fallax, abundance did not differ strongly between exclosure‐protected and overgrazed areas, but its egg development duration was longer in exclosures. The two C.
Dan‐dan Feng, Hui‐feng Zhao, Ya‐hui Men, Jing Li, Mei‐ling Yang, Cai‐qing Yang, Bing Chen, Ai‐bing Zhang   +7 more
wiley   +1 more source

Environmental Drivers of Geographic Isolation in Three Pika Species in Northeast Asia

Integrative Zoology, EarlyView.
Using bias‐corrected species distribution models, we found that geographic isolation among three northeastern Asian pika species (Ochotona coreana, Ochotona mantchurica, and Ochotona hyperborea) reflects both divergent environmental preferences and potential competitive interactions. O.
Yuxi Peng, Chengbin Yang, Dallin B. Kohler, Wenxuan Yu, Hailong Li, Chongzhe Zhong, Yucheol Shin, Zhengji Piao, Guanglan Cao, Weihong Zhu, Amaël Borzée, Ying Li   +11 more
wiley   +1 more source

Phylogeography of the Plateau Pika (Ochotona curzoniae) in Response to the Uplift of the Qinghai-Tibet Plateau

Diversity, 2023
The evolution and current distribution of species on the Qinghai-Tibet Plateau have been significantly impacted by historical occurrences, including the uplift of the plateau and the Quaternary climate upheaval. As a remnant species, the plateau pika (Ochotona curzoniae) is a great model for researching historical events.
Yinglian Qi, Xiaoyan Pu, Zhilian Li, Daoguang Song, Zhi Chen   +4 more
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Conserving Rodent Pests in Transition Toward Endangered Status

Integrative Zoology, EarlyView.
Rodent control invariably takes place in the context of ecosystems heavily modified by agriculture. Together, they are potent drivers of rodent decline and endangerment. Nineteen percent of 2349 rodent species evaluated in the IUCN Red List of threatened species are of some conservation concern.
Xavier Lambin
wiley   +1 more source