Results 41 to 50 of about 1,106 (156)

Natural selection and adaptive evolution of leptin in the ochotona family driven by the cold environmental stress. [PDF]

PLoS ONE, 2008
BACKGROUND: Environmental stress can accelerate the evolutionary rate of specific stress-response proteins and create new functions specialized for different environments, enhancing an organism's fitness to stressful environments. Pikas (order Lagomorpha)
Jie Yang, Zhen Long Wang, Xin Quan Zhao, De Peng Wang, De Lin Qi, Bao Hong Xu, Yong Hong Ren, Hui Fang Tian   +7 more
doaj   +1 more source

Dynamical Analysis of a Plateau Pika with Cross-Diffusion under Contraception Control [PDF]

Discrete Dynamics in Nature and Society, 2014
A plateau pika model with spatial cross-diffusion is investigated. By analyzing the corresponding characteristic equations, the local stability of an coexistence steady state is discussed whend21is small enough. However, whend21is large enough, the model shows Turing bifurcation ifB2 -4AC > 0.
Xiaoyan Wang, Junyuan Yang, Fengqin Zhang   +2 more
openaire   +2 more sources

Analyzing the recovery mechanisms of patchy degradation and its response to mowing and plateau pika disturbances in alpine meadow

Ecological Indicators, 2023
The alpine meadow is susceptible to degradation triggered by overgrazing and rodent outbreaks, leading to uneven patches of degradation. In this regard, we conducted a study that involved the implementation of nine combined treatments utilizing a two ...
Zihan Song, Xilai Li, Xiaoxue Su, Chengyi Li   +3 more
doaj   +1 more source

Effect of Hypoxia on Ldh-c Expression in Somatic Cells of Plateau Pika. [PDF]

Int J Environ Res Public Health, 2016
Sperm specific lactate dehydrogenases (LDH-C4) is a lactate dehydrogenase that catalyzes the conversion of pyruvate to lactate. In mammals, Ldh-c was originally thought to be expressed only in testes and spermatozoa. Plateau pika (Ochotona curzoniae), which belongs to the genus Ochotona of the Ochotonidea family, is a hypoxia-tolerant mammal living ...
Wei D, Wei L, Li X, Wang Y, Wei L.
europepmc   +3 more sources

Small Semi-Fossorial Herbivores Affect the Allocation of Above- and Below-Ground Plant Biomass in Alpine Meadows

Frontiers in Plant Science, 2022
Small semi-fossorial herbivores can affect plant aboveground biomass (AGB) in grasslands and possibly alter the allocation of AGB and belowground biomass (BGB).
Qian Wang, Xiao Pan Pang, Zheng Gang Guo
doaj   +1 more source

Infrared Spectroscopic Predictions of Soil Properties for Agricultural Monitoring: Statistical and Soil Spectroscopic Considerations

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background: Pseudo‐independent validation (PIV) using regional datasets is common in visible‐to‐near‐infrared (vis–NIR) and mid‐infrared (MIR) spectroscopy studies and produces accurate predictions but is relevant only to regional‐scale monitoring of known sites.
Svenja Tauber, Isabel Greenberg, Bernard Ludwig   +2 more
wiley   +1 more source

Cardiovascular Plasticity and Adaptation of High‐Altitude Birds and Mammals

Integrative Zoology, EarlyView.
This schematic depicts the cardiovascular adaptations of mammals and birds to high‐altitude hypoxia. It highlights key phenotypic changes in oxygen transport and cardiac responses, driven by molecular mechanisms including transcriptional regulation and genetic modifications.
Huishang She, Yanhua Qu
wiley   +1 more source

Effect of plateau pika presence on the ecosystem services of alpine meadows [PDF]

, 2022
Abstract. The activity of small mammalian herbivores influences grassland ecosystem services in arid and semi-arid regions. This study took plateau pika (Ochotona curzoniae) as example animal to investigate the effect of small mammalian herbivores on meadow ecosystem services in alpine regions.
Yingying Chen, Huan Yang, Gensheng Bao, Xiaopan Pang, Zhenggang Guo   +4 more
openaire   +1 more source

Simulation and response mechanism of potential geographical distribution of plateau pika Ochotona curzoniae under climate change

Global Ecology and Conservation
With global warming, climate change had significant impacts on the distribution of species and their habitats. As one of the keystone species of the Qinghai-Tibet Plateau (QTP), the plateau pika Ochotona curzoniae plays a vital role in the alpine ...
Yanni Song, Hainan Chong, Dawei Wang, Haijun Xiao   +3 more
doaj   +1 more source

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