Plateau pika
Such effects may be influenced by grazing pressure from domestic livestock, population levels of natural predators, and climate change. Conclusion Decrease of NEE by plateau pika may reduce the carbon sink balance of Qinghai-Tibet plateau grassland. The Plateau Pika (Ochotona curzoniae) is a medium-sized rodent (c140g) that occurs mainly on the high desert plateaux of China, but also in Tibet, Pakistan. Putative reasons for these control measures are that pika populations may reach high. Summary edit Description Plateau Pika area. Plateau pikas (Ochotona curzoniae) are poisoned widely across the plateau. Plateau pika evolved with the uplifting of the Tibetan Plateau (Yu et. It is recommended to name the SVG file 'Plateau Pika area.svg' then the template Vector version available (or Vva) does not need the new image name parameter. NEE was positively related to soil moisture, soil ammonium nitrogen, plant cover, leaf area index and above-ground biomass but was negatively correlated with higher soil nitrate nitrogen. In August, population densities may range from 100 to 400 pikas ha1 (Liu et al., 1982). Responses of NEE were related to changes of abiotic and biotic factors affecting its two components. Ochotona curzoniae (Plateau Pika) is a species of mammals in the family pikas.
![plateau pika plateau pika](https://live.staticflickr.com/65535/48960892581_c6ca660b2e.jpg)
Higher burrow density was associated with lower soil moisture and higher soil temperature. Above-ground biomass, species number, plant cover and leaf area index decreased with increasing pika density. Results Higher burrow density decreased NEE, GEP and ER.
![plateau pika plateau pika](https://live.staticflickr.com/4576/24906392078_5c56c69285_b.jpg)
Methods We measured net ecosystem CO₂ exchange (NEE) and its components gross ecosystem productivity (GEP) and ecosystem respiration (ER) at peak aboveground biomass by the chamber method with reference to plant and soil characteristics of areas of alpine meadow steppe with different densities of pika burrows. They don't hibernate or migrate to warmer climates during winter, so. This study showed that plateau pika bioturbation was related to lower organic C concentrations in bare soil in the 010 cm and 1020 cm layers than in vegetated soil and to lower total N. Background and aim Because the indigenous burrowing lagomorph plateau pika (Ochotona curzoniae) is considered to have negative ecological impacts on alpine meadow steppe grasslands of the Headwaters Region of the Yellow, Yangtze and Mekong Rivers we investigated its effects on ecosystem productivity and soil properties, and especially net ecosystem carbon flux. Plateau pikas (Ochotona curzoniae) live in high-altitude meadows up to about 16,400 feet (5,000 meters) above sea level.