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Limnological features of glacier-fed rivers in the Southern Tibetan Plateau, China

机译：青藏高原南部冰川河的湖泊学特征

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摘要

We describe the limnological features of six glacier-fed rivers located at an altitude of over 4,000 m in Southern Tibetan Plateau, China, based on diurnal observations of the water environment and biota in the summer of 2010. The rivers showed significant diurnal changes in water level, temperature, and turbidity; clear and cool streams in the morning changed to cloudy rapid flow in the afternoon, and water temperature was elevated under strong light conditions where riparian forest did not cover the surface of the water. On the other hand, the pH and dissolved oxygen saturation did not show any diurnal fluctuations, which indicates low periphytic algal productivity. The aquatic insect communities were poor both in diversity and density, and the dominant life forms (from a functional feeding group perspective) were collectors, which depend on allochthonous organic matter; scrapers, which depend on autochthonous algal production, were scarce. We therefore suggest that diurnal or seasonal high waters transport products from marginal pools along dried riverbeds or from ponds on flood plains, and may serve as the source of organic matter in glacier-fed rivers.
机译：基于2010年夏季对水环境和生物区系的每日观测，我们描述了位于中国青藏高原南部4,000 m以上的6条冰川河河流的湖泊学特征。这些河流的水日变化显着液位，温度和浊度；早晨清澈凉爽的溪流变为下午多云的急流，在强光条件下河岸森林没有覆盖水面，水温升高。另一方面，pH和溶解氧饱和度没有任何昼夜波动，表明藻类藻类生产力较低。水生昆虫群落的多样性和密度均较差，主要的生命形式（从功能性摄食组的角度来看）是捕集者，它们依赖于异源有机物。依靠本地藻类生产的刮板很稀少。因此，我们建议，昼夜或季节性高水位会从干燥河床的边际池中或洪泛平原上的池塘中运输产品，并可能成为冰川河中有机物的来源。

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