Changes in waterbird diversity due to the construction of Pong Dam reservoir, Himachal Pradesh, India

Pandey, Sanjeeva

doi:10.1016/0006-3207(93)90143-o

Cited by 23 publications

(7 citation statements)

References 2 publications

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“…Pong Dam was constructed across the River Beas (India) in 1960. Waterbird surveys at Pong Dam Reservoir were initiated in 1985 and showed that waterbird abundance and diversity have been considerably enhanced after creation of the dam, as some birds not seen previously were observed (Pandey 1993).…”

Section: Natatorial Birds On the Dam Reservoirmentioning

confidence: 99%

Meteorology and species composition of plant communities, birds and fishes before and after initial impoundment of Miharu Dam Reservoir, Japan

Azami¹,

Takemoto²,

Otsuka³

et al. 2011

Landscape Ecol Eng

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The immediate impact of damming appears most notably at the first filling of water, when the dam blocks the river and a lake suddenly forms. In this review, the changes in meteorology, plant communities, birds and fishes surrounding initial impoundment of Miharu Dam, constructed in an Asian Monsoon region, are summarised based on previous papers and subsequent field research. Although wind and temperature changes were investigated, land and lake wind occur due to the different thermal properties between the land and lake, and this type of wind often occurs at large lakes such as Glen Canyon Dam Reservoir or Lake Biwa. The size of Miharu Dam Reservoir (ponding area 2.9 km 2 ) was insufficient to cause landlake air differentials. Therefore, wind direction and air temperature were unaffected. Mountain winds weakened at the lake centre and near the dam body. Changes in vegetation were especially diverse at the drawdown zone (the slopes above and below the normal water level). On slopes above this zone, trees died and species composition changed due to submergence. Within the drawdown zone, the pre-existing plant community disappeared, and floodresistant plants such as Salix subfragilis increased. The natatorial bird population continued to grow for 4 years after dam reservoir emergence and stabilised thereafter. Every year, the majority of natatorial birds utilising the dam reservoir as a resting area were ducks, but populations of diving ducks fluctuated depending on water level and iced area. After impoundment, the fish populations increased. As in most dam reservoirs in Japan, populations of invasive fish species such as Micropterus salmoides and Lepomis macrochirus increased. However, spawning grounds dried up during low-water-level seasons, suggesting that regulating water levels may help reduce invasive species.

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Section: Natatorial Birds On the Dam Reservoirmentioning

confidence: 99%

Meteorology and species composition of plant communities, birds and fishes before and after initial impoundment of Miharu Dam Reservoir, Japan

Azami¹,

Takemoto²,

Otsuka³

et al. 2011

Landscape Ecol Eng

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“…Pandey (1993) discovered an increased bird species diversity resulting from the construction of the Pong Dam Reservoir in the State of Himachal Pradesh (Fig. 1).…”

Section: Issue 4 Inundation By Dammed Reservoirsmentioning

confidence: 99%

Processes of wetland loss in India

Foote¹,

Pandey

Krogman

1996

Envir. Conserv.

Self Cite

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SummaryWetlands in India supply crucial human and animal needs such as drinking water, protein production, fodder, water purification, wildlife habitat, and flood storage. Increased appreciation of uses and threats is essential to protect wetlands where justified. Three quarters of India's population is rural, it places great demands on India's wetlands and losses continue to occur. This paper is based on extensive discussions with natural resource managers, government employees, farmers, academicians, and resource users at dozens of sites in India, as well as an extensive literature search. Twelve important kinds of wetland loss are identified and mechanisms believed to be causing them discussed: (1) agricultural conversion, (2) direct deforestation, (3) hydrologie alteration, (4) inundation, (5) defoliation, (6) altered upper watersheds, (7) accumulative water demands, (8) water quality degradation, (9) wetland consolidation, (10) global climate change, (11) ground-water depletion, (12) exotic species and biodiversity. Wetland understanding, management, and Public awareness in India must continue growing if wetland resources are to remain functional.

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“…Despite of the overall biodiversity loss (Nilsson et al 2005) and the modification of ecological function (Dugan 1990), some waterbird species can respond positively to dam construction (i.e. creation of artificial wetlands) (Pandey 1993, Okes et al 2008). In this context, there is increasing evidence that several anthropogenic wetlands could reduce the impact of natural wetland loss for migratory waterbirds (Elphick 2000, Masero 2003, Kloskowski et al 2009, Yasué and Dearden 2009, Toral and Figuerola 2010).…”

Section: Introductionmentioning

confidence: 99%

International importance of Extremadura, Spain, for overwintering migratory dabbling ducks: a role for reservoirs

Navedo

Masero

Sánchez‐Guzmán

et al. 2011

Bird Conservation International

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SummaryMany migratory waterbird populations are in decline and loss of natural wetlands is one of the main causes. However, some species may respond positively to artificial wetland recreation. In Extremadura (south-west Europe), several large reservoirs were created for irrigation since the 1960s and some comparatively small reservoirs were built from the late 1990s onwards close to rice fields. Here we analyse the abundance of wintering dabbling ducks (Anas spp.) in Extremadura before (1991–1994) and after (2007–2010) the creation of these new reservoirs in order to address the current importance of the area for this guild within the East Atlantic Flyway (EAF). A mean of 25,277 dabbling ducks wintered in the study area during 1991–1994, increasing to 46,163 individuals during 2007–2010. After controlling for environmental variables, Northern Pintail Anas acuta, Common Teal A. crecca and Northern Shoveler A. clypeata experienced significant increases in the area between both periods, and only Eurasian Wigeon A. penelope suffered a significant decrease. Mallard A. platyrhynchos and Gadwall A. strepera populations did not show any significant trend. The large older reservoirs experienced overall population decreases between the two periods, with four new reservoirs holding more than 35,000 wintering dabbling ducks. Our results reflect an overall improvement in habitat conditions, driven by the creation of reservoirs near to rice fields that could have resulted in a partial redistribution of wintering dabbling ducks in the EAF. The area emerges as one of the most important wintering sites for dabbling ducks in southern Europe, regularly exceeding two of the Ramsar Convention criteria for the conservation of several populations. The protection of these new reservoirs by legal mechanisms would guarantee the existence of a large functional wetland area, which could also mitigate the loss of natural wetlands for populations using the EAF.

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Changes in waterbird diversity due to the construction of Pong Dam reservoir, Himachal Pradesh, India

Cited by 23 publications

References 2 publications

Meteorology and species composition of plant communities, birds and fishes before and after initial impoundment of Miharu Dam Reservoir, Japan

Meteorology and species composition of plant communities, birds and fishes before and after initial impoundment of Miharu Dam Reservoir, Japan

Processes of wetland loss in India

International importance of Extremadura, Spain, for overwintering migratory dabbling ducks: a role for reservoirs

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