Dal Lake - Flora and Fauna

Flora and Fauna

The ecosystem of Dal Lake is ecologically rich in macrophytes, submerged macrophytes, floating macrophytes and phytoplankton. Macrophyte flora recorded in the lake's aquatic and marshland environment consists of 117 species, belonging to 69 genera and 42 families. The lake is noted in particular for its Nelumbo nucifera (lotus flowers) which bloom in July and August. The prolific growth of Ceratophyllum demersum in the eutrophic zones has been reported, with Myriophyllum spicatum and Potemogetton lucens cited as dominant species. Other macrophytes discerned in different zones of the lake include Typho angustata, Phragmites australis, Myriophyllum, Sparganium evectum and Myriophyllum verticillatum, which contribute to the production of macrophites. The rooted variety of the floating leaf type consists of Neelambium nucifera, Nymphaea alba, N.Tertagonia, N.Candida, Nymphoides peltatum, Salvinia natans, Hydrocharis dubia, Nymphaea sp. and Potamogeton natans, all of which occupy 29.2% of the lake. Phytoplanktons include Navicula radiosa, Nitzschia accicularis, Fragilaria crotonensis, Diatoma elongatum, Scenedesmus bijuga, Pediastrum duplex, Tetraedron minimum, Microcystis aeruginosa and Merismopedia elegans.

Since 1934, some important changes have been observed in the lake's biota, including a reduction in the number of Chara species, and an increase in the area covered by Salvinia since 1937. Analysis of the lake has also revealed the tendency for it to develop monospecific communities of submerged macrophytes such as Ceratophyllum and Myriophyllum.

Woody vegetation in the catchment of the lake consists of Melia, Ailanthus, Robinia, Daphne, Celtis, Rose, Ephedra, Pinus roxburghii, Pinus halepensis, Pinus gerardiana, Cupressus torulosa and Cupressus arizonica. The valley also has a rich cultivation of crops such as paddy, wheat and fodder.

Floating gardens, labelled the 'Rad' in tye Kashmiri language are a special feature of the lake. They basically constitute of matted vegetation and earth, but are floating. These are detached from the bottom of the lake and drawn to a suitable place (generally to the north west of the houseboats' location) and anchored. Given its rich nutrient properties, tomatoes, cucumbers and melons are grown with noteworthy results.

The faunal distribution consists of Zooplanktons, Benthos and Fish. Zooplankton found in the lake include Keratella cochlearis, K. serrulata, Polyactis vulgaris, Brachionus plicatilis, Monostyla bulla, Alona monocantha, Cyclops ladakanus and Mesocyclops leukarti. Benthos include Chironomus sp. and Tubifex sp. and fish include Cyprinus carpio specularis (economically important), C. carpio communis, Schizothorax niger, S. esocinus, S. curviformis and Crossochelius latius. It is also reported that Cyprinus, introduced during early sixties, is dominant and that the indigenous species Schizothorax is showing a declining trend.

Fishing resources

The fishing industry on Dal Lake is the second largest industry in the region and is central to many of the people's livelihoods who reside on the lake's periphery. Dal lake's commercial fisheries are particularly reliant on carp fish species, which were introduced into the lake in 1957. As a result, carp constitutes 70% of all the fish caught in the lake while the schizothonax constitutes 20% and other species account for 10%. Fishermen use a locally manufactured cast net which comprises six parts with a diameter of 6 metres. It is operated from a wooden fishing boat made out of deodar, typically 20ftx4ft in size. The gradual decline in quality of the lake water through pollution has resulted in lower fish stocks and the extinction of endemic varieties of fish. The causes for such deterioration have been identified and remedial actions have been initiated.