نتایج جستجو برای: himalayas
تعداد نتایج: 2242 فیلتر نتایج به سال:
Bar-headed geese cross the Himalayas on one of the most iconic high-altitude migrations in the world. Heart rates and metabolic costs of flight increase with elevation and can be near maximal during steep climbs. Their ability to sustain the high oxygen demands of flight in air that is exceedingly oxygen-thin depends on the unique cardiorespiratory physiology of birds in general along with seve...
• Distribution of hydropower projects in biodiverse areas Nepal studied Existing lie the Hill, future moving northward Himalayas Hydropower is located more than half More five thousand megawatts inside Future are interacted with project construction increasing, which can affect terrestrial environment. environmentally sensitive have higher environmental impacts, so we analyzed spatiotemporal in...
By means of mitochondrial 12S rRNA sequencing of putative "yeti", "bigfoot", and other "anomalous primate" hair samples, a recent study concluded that two samples, presented as from the Himalayas, do not belong to an "anomalous primate", but to an unknown, anomalous type of ursid. That is, that they match 12S rRNA sequences of a fossil Polar Bear (Ursusmaritimus), but neither of modern Polar Be...
Rapid climate change at high elevations has accelerated glacier retreat in the Himalayas and Tibetan Plateau. However, due to the lack of long-term glaciological measurements, there are still uncertainties regarding when the mass loss began and what the magnitude of mass loss is at such high elevations. Based on in situ glaciological observations during the past 9 years and a temperature-index ...
Bar-headed geese are renowned for migratory flights at extremely high altitudes over the world's tallest mountains, the Himalayas, where partial pressure of oxygen is dramatically reduced while flight costs, in terms of rate of oxygen consumption, are greatly increased. Such a mismatch is paradoxical, and it is not clear why geese might fly higher than is absolutely necessary. In addition, dire...
The Himalayas are a global hotspot for bird diversity with a large number of threatened species, but little is known about seasonal changes in bird communities along elevational gradients in this region. We studied the seasonality of bird diversity in six valleys of the Central Himalayas, Nepal. Using 318 plots with a 50 m radius, located from 2200 to 3800 m a.s.l., and repeated sampling during...
Many parts of the world with young mountain chains, such as the Himalayas, are highly susceptible to landslides. Due to general ruggedness and steep slopes, roads provide the only way of transportation and connectivity in such terrains. Generally, landslide hazards are overlooked during route planning. In this study, in a test area in the Himalayas, various thematic layers, viz. landslide distr...
The genus Paleonura Cassagnau, 1982, with 50 species, is found mainly in the tropical and subtropical regions of the world with some species restricted to high altitudes. Eighteen species have been described from the mountains above 800 m a. s. l., in the Himalayas (13 species) and Kenya and Tanzania (three species each). Seven species (together with the new one) have been found in the mountain...
The present investigation is an attempt to assess the ethno-medicinal worth of some selected wild edible fruits and vegetables used by the inhabitants Lesser Himalayas, Pakistan. Informed consent semi-structured interviews from 95 inhabitants of fifteen mountainous vicinities were conducted to collect data. A total of 20 wild edible fruits and vegetables belonging to 18 families and 18 genera w...
Temperature data for seven instrumental records in the Karakoram and Hindu Kush Mountains of the Upper Indus Basin (UIB) have been analyzed for seasonal and annual trends over the period 1961–2000 and compared with neighboring mountain regions and the Indian subcontinent. Strong contrasts are found between the behavior of winter and summer temperatures and between maximum and minimum temperatur...
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