Trophic status of Tilitso, a high altitude Himalayan lake

Aizaki, Morihiro; Terashima, Akira; Nakahara, Hiroyuki; Nishio, Takayuki; Ishida, Yūzaburō

doi:10.1007/bf00007208

Cited by 22 publications

(25 citation statements)

References 9 publications

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“…The largest and deepest lake in Nepal, Lake Rara (area 980 ha, Z max 167 m, altitude 3,000 m), is in the HM region of the western part of the country, while another deep lake is Tilicho (95 m) in the HH region (AIZAKI et al, 1987;DHM/HMG, 2004). The deepest lakes sampled in the present study are also in the HH region: Bhairav Kund (Z max = 60 m), Tso Rolpa (57 m In the Himalayas, seasonal differences of both air-and surface-water temperature are caused by variations of a subtropical high-pressure belt, and they show large effects of altitude (TARTARI et al, 1998b).…”

Section: Physical Limnologymentioning

confidence: 99%

Physical and Chemical Limnology of 34 Lentic Waterbodies along a Tropical-to-Alpine Altitudinal Gradient in Nepal

Lacoul¹,

Freedman

2005

Internat. Rev. Hydrobiol.

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Physical and chemical factors were studied in 34 lentic waterbodies distributed along a steep altitudinal gradient ranging from tropical (77 m) to high alpine (up to 4,980 m) environments in Nepal. Bicarbonate and calcium were dominant among anions and cations, respectively, reflecting a strong influence of carbonate weathering and watershed area, rather than altitudinal climate. The relative patterns of dominant ions were similar among lakes in all altitudinal regions, although total concentrations increased with decreasing altitude. Total suspended solids were relatively high in the study lakes, as is also typical of rivers in the Ganges watershed. Suspended solids had a greater influence on water transparency than did algal biomass in the study lakes. In general, high-altitude waterbodies were oligotrophic, while those at low altitude were eutrophic. The productivity of high-altitude study lakes appeared to be limited by both available phosphorus and nitrogen, while lowland ones were nitrogen-limited.

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Section: Physical Limnologymentioning

confidence: 99%

Physical and Chemical Limnology of 34 Lentic Waterbodies along a Tropical-to-Alpine Altitudinal Gradient in Nepal

Lacoul¹,

Freedman

2005

Internat. Rev. Hydrobiol.

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“…The research studies carried out in the lakes and ponds of Nepal have covered various aspects of limnology (Ferro 1978, Okino & Satoh 1986, Aizaki et al 1987, Nakanishi et al 1988, Jones et al 1989, McEachern 1994, Tartari et al 1998, Rai 2000, Lacoul & Freedman 2005, plankton, macrophytes, macroinvertebrates (Manca et al 1998, Bhatt et al 1999, Dhakal 2007, Lacoul & Freedman 2006, environmental change (Lami et al 1998, Sharma et al 2009, diatoms (Hickel 1973a, b;Lohman et al 1988, Jüttner et al 1996, Rothfritz et al 1997, Cantonati et al 2001, Jüttner et al 2003, 2004, Dahal & Jüttner 2004, Simkhada 2007. Studies on the composition of vegetation surrounding the lakes have been carried out by Baral (1992), Bhattarai (1997), , Rai (1998), , Siwakoti (2006) in order to understand the habitat type.…”

Section: Study Scopementioning

confidence: 99%

Scientific Discourse of Lakes in Nepal

Bhuju

Sharma

2013

Nepal Journal of Science and Technology

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Over 5,000 standing water bodies, including those <1 ha and spread in 74 districts of Nepal have been scanned on the topographic sheets (scale of 1:125,000). Majority of these lakes or ponds are either in the high altitudes (above 3,000 m) or in lowland Tarai (below 500 m). In a literature review we found over 163 research studies conducted since the first study of lakes in 1969 in Khumbu region, majority being at the initiative of national academia, their faculties and graduate students. However, a complete inventory of Nepal's lakes is still lacking. Their characteristics and distinction from wetlands are also to be defined as the existing laws and rules do not protect lakes or ponds categorically, rather they are blanketed under wetlands and/or other river like water resources. Research observations have shown that acid depositions are the most likely source of pollution affecting high altitude lakes in the Himalayan regions during spring. Their value as religious sites has also caused anthropogenic alteration in nutrient concentrations and biological assemblages of the lake. Encroachment to the lakes/ponds is rampant to which the natural processes of sedimentation, alien species invasion or any kind of obliteration become supportive. Capacity building, knowledge generation and threat management are vital to protect these natural heritages from untimely demise.

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“…The lakes in these remote areas are particularly suitable for study, where the climate signals are maximized mainly due to the limited importance of human impact (Smol et al 1991). Although, high altitude lakes in Nepalese Himalaya were considered as pristine (Aizaki et al 1987), they are being affected by various environmental factors and climatic change due to acidification, eutrophication, global warming and UV radiation (Cantonati et al 2001). Mountain lakes located at the high elevation are more susceptible to atmospheric inputs than lowland lakes due to factors such as climate, shallow soils, small watersheds and rapid flushing rates (Mosello et al 1995, Galassi et al 1997, Lami et al 1998).…”

Section: Introductionmentioning

confidence: 99%

“…The first high altitude limnological study in Nepal was carried out by Löffler (1969), who provided the data on morphometry, temperature, chemistry and biology of 24 lakes at altitudes between 4500 and 5600 m in the Mount Everest region (Khumbu Valley). Although there have been several studies on high mountain lakes, very few studies focused on water chemistry (Loffler 1969, Aizaki et al 1987, Tartari et al 1998a & b, Lacoul & Freedman 2005. Studies in other lakes include Okino and Satosh 1986, Aizaki et al 1987, Liu & Sharma 1988, Tartari et al 1998.…”

Section: Introductionmentioning

confidence: 99%

“…Although there have been several studies on high mountain lakes, very few studies focused on water chemistry (Loffler 1969, Aizaki et al 1987, Tartari et al 1998a & b, Lacoul & Freedman 2005. Studies in other lakes include Okino and Satosh 1986, Aizaki et al 1987, Liu & Sharma 1988, Tartari et al 1998. Limnological studies in Sagarmatha National Park have been carried out in late 1990s.…”

Section: Introductionmentioning

confidence: 99%

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Physico-chemical Characterization of Gosainkunda Lake

Raut

Sharma

Bajracharya

et al. 2013

Nepal Journal of Science and Technology

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High altitude lakes are very sensitive to climate change due to their small catchment area, limited vegetation cover, surface water with low nutrients, and thin soil and low bedrock weathering rates. The present study was focused on high altitude Himalayan Lake Gosainkunda, situated at an elevation of 4300 m in the Langtang National Park, and carried out during the post-monsoon season (October) in 2010. The main aim of the study was to assess the water quality quantitatively considering the anthropogenic as well as natural impacts in the lake. The water samples were collected at six different sites to represent entirely the quality of the lake. The sampling sites were systematically designated as the inlet, outlet, human influence site, littoral zone, middle (central) and the deepest part of the lake.

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Trophic status of Tilitso, a high altitude Himalayan lake

Cited by 22 publications

References 9 publications

Physical and Chemical Limnology of 34 Lentic Waterbodies along a Tropical-to-Alpine Altitudinal Gradient in Nepal

Physical and Chemical Limnology of 34 Lentic Waterbodies along a Tropical-to-Alpine Altitudinal Gradient in Nepal

Scientific Discourse of Lakes in Nepal

Physico-chemical Characterization of Gosainkunda Lake

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