Palaeoenvironment shifts during last ~ 500 years and eutrophic evolution of the Wular Lake, Kashmir Valley, India

Limnology ◽  
2020 ◽  
Author(s):  
Rayees Ahmad Shah ◽  
Hema Achyuthan ◽  
Aasif Lone ◽  
Pankaj Kumar ◽  
Asif Ali ◽  
...  
Keyword(s):  
Kashmir Valley ◽  
Wular Lake

Holocene palaeoenvironmental records from the high-altitude Wular Lake, Western Himalayas

The Holocene ◽  
2020 ◽  
Vol 30 (5) ◽  
pp. 733-743 ◽  
Author(s):  
Rayees Ahmad Shah ◽  
Hema Achyuthan ◽  
Aasif Mohmad Lone ◽  
Sanjeev Kumar ◽  
Pankaj Kumar ◽  
...  
Keyword(s):  
High Altitude ◽  
North Atlantic ◽  
Sedimentation Rate ◽  
Lake Level ◽  
Western Himalayas ◽  
Kashmir Valley ◽  
Climate Conditions ◽  
Wular Lake ◽  
Wet Climate ◽  
Lake Margin

We present a comprehensive record of Holocene (11,590–628 cal. yr BP) climate and hydrographic changes around the Wular Lake located in Kashmir Valley, India. Based on the multi-proxy investigations, we have identified three phases of wet climate conditions that prevailed from the commencement of the Holocene Epoch – 9000 cal. yr BP, 8100–6650 cal. yr BP and 6350–5000 cal. yr BP, whereas periods of dry climate were observed during 9000–8100 cal. yr BP, 6650–6350 cal. yr BP and ~5000 to 4000 cal. yr BP. The results also suggested that the lake widened and deepened significantly around 6350–5000 cal. yr BP. The results indicated desiccation and the exposure of the lake margin around 5000–4500 cal. yr BP. The sedimentation rate since 4500–628 cal. yr BP was quite low for detailed paleoclimate interpretations. Oscillations in lake extension and deepening appear to be due to changing intensity of westerly moisture in the region, and we correlate several of the low lake-level phases to the Bond events caused by North Atlantic ice rafting events.

Mineral Magnetic and Geochemical Mapping of the Wular Lake Sediments, Kashmir Valley, NW Himalaya

2019 ◽  
Vol 26 (1) ◽  
pp. 31-52 ◽  
Author(s):  
Rayees A. Shah ◽  
Hema Achyuthan ◽  
Satish J. Sangode ◽  
Aasif M. Lone ◽  
Mohammd Rafiq
Keyword(s):  
Lake Sediments ◽  
Geochemical Mapping ◽  
Kashmir Valley ◽  
Nw Himalaya ◽  
Wular Lake ◽  
Mineral Magnetic

scholarly journals IMPACT OF FLOODING ON LAND USE/ LAND COVER TRANSFORMATION IN WULAR LAKE AND ITS ENVIRONS, KASHMIR VALLEY, INDIA USING GEOINFORMATICS

2017 ◽  
Vol IV-4/W4 ◽  
pp. 13-18 ◽  
Author(s):  
T. Ahmad ◽  
A. C. Pandey ◽  
A. Kumar
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Aquatic Vegetation ◽  
Satellite Image ◽  
Water Bodies ◽  
Land Use Land Cover ◽  
Terrestrial Vegetation ◽  
Kashmir Valley ◽  
Wular Lake ◽  
Classified Image

Wular lake, located at an elevation of 1520&amp;thinsp;m above sea level in Kashmir valley, India. In the present study, the immediate and long term impact of flood (2014) over the Wular lake environs was analyzed by using satellite images and employing supervised classification technique in GIS environment. The LULC classification was performed on the images of 25th August 2014 (pre flood) and 13th September 2015 (post flood) and was compared, which indicated marked decrease in terrestrial vegetation (23.7&amp;thinsp;%), agriculture (43.7&amp;thinsp;%) and water bodies (39.9&amp;thinsp;%). Overlaying analysis was performed with pre and post flood classified images with reference to the satellite image of 10th September 2014(during flood) which indicated total area inundated during flood was 88.77&amp;thinsp;km<sup>2</sup>. With the pre-flood situation, the aquatic vegetation of 34.06&amp;thinsp;km<sup>2</sup>, 13.89&amp;thinsp;km<sup>2</sup> of agriculture land and terrestrial vegetation of 3.13&amp;thinsp;km<sup>2</sup> was inundated. In the post flood situation, it was also came into focus that more than the half of the area under water bodies was converted into sand deposits (22.76&amp;thinsp;km<sup>2</sup>) due to anomalous increase in siltation. The overlay analysis on post flood classified image indicated that aquatic vegetation followed by agriculture and sand deposits lie within the flood inundated area. Further spatial analysis was performed within the flood inundated area (88.77&amp;thinsp;km<sup>2</sup>) with pre and post classified image to understand the situation before and after the flood and to calculate the changes. These land use-land cover transformations signifies the ill effect of flooding on the biodiversity of Wular Lake.

ESTIMATION OF ABOVE GROUND BIOMASS OF THE THREE SITES (GRAZED SITE, PROTECTED SITE AND SEED SOWN SITE) FOR COMPARING THEIR PRODUCTIVITY IN KASHMIR VALLEY

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
AFSHAN ANJUM BABA ◽  
SYED NASEEM UL-ZAFAR GEELANI ◽  
ISHRAT SALEEM ◽  
MOHIT HUSAIN ◽  
PERVEZ AHMAD KHAN ◽  
...  
Keyword(s):  
Protected Areas ◽  
Aboveground Biomass ◽  
Plant Biomass ◽  
Summer Season ◽  
Above Ground Biomass ◽  
Spring Season ◽  
Kashmir Valley ◽  
Ground Biomass ◽  
Maximum Value ◽  
Protected Site

The plant biomass for protected areas was maximum in summer (1221.56 g/m2) and minimum in winter (290.62 g/m2) as against grazed areas having maximum value 590.81 g/m2 in autumn and minimum 183.75 g/m2 in winter. Study revealed that at Protected site (Kanidajan) the above ground biomass ranged was from a minimum (1.11 t ha-1) in the spring season to a maximum (4.58 t ha-1) in the summer season while at Grazed site (Yousmarag), the aboveground biomass varied from a minimum (0.54 t ha-1) in the spring season to a maximum of 1.48 t ha-1 in summer seasonandat Seed sown site (Badipora), the lowest value of aboveground biomass obtained was 4.46 t ha-1 in spring while as the highest (7.98 t ha-1) was obtained in summer.

Radiometric Chronology of Neh–nar Glacier, Kashmir

1982 ◽  
Vol 28 (98) ◽  
pp. 91-105 ◽  
Author(s):  
V. N. Nijampurkar ◽  
N. Bhandari ◽  
C. P. Vohra ◽  
V. Krishnan
Keyword(s):  
Average Rate ◽  
Component Model ◽  
Vertical Profiles ◽  
Kashmir Valley ◽  
Movement Rate ◽  
Accumulation Zone ◽  
Core Samples ◽  
Surface Samples ◽  
Two Component

AbstractSurface and core samples of Neh–nar Glacier in the Kashmir Valley have been analysed for the radionuclides 32Si. 210Pb, 40K, and 137Cs. The lateral and vertical profiles (at an altitude of about 4 140 m) reveal:(1)32Si activity decreasing slowly from the accumulation zone to 4 050 m altitude and then abruptly towards the snout.(2)Five zones of alternating high and low 210Pb activity in the surface samples.(3)An horizon at between 2 and 3 m depth containing 210Pb activity above natural levels. This horizon is also associated with 137Cs and a maximum in total ß activity.The ice samples have been dated on the basis of a simplified two–component model, the “fresh“contribution determined by 2l0Pb and the old component by 32Si. The following conclusions can be drawn from these observations:(1)The model age of the snout ice is c. 850 years.(2)The average rate of ice movement in the lower glacier is about 2 m/year, which compares well with the annual movement rate of 2.65 m/year observed since 1974.

Marker-assisted identification of potential fertility restorers for the development of three-line hybrids in rice (Oryza sativa L.)

2020 ◽  
Vol 57 (3) ◽  
pp. 181-189
Author(s):  
Asma Majid ◽  
GA Parray ◽  
NR Sofi ◽  
Gazala H Khan ◽  
Showkat A Waza ◽  
...  
Keyword(s):  
Oryza Sativa L ◽  
Chromosome 1 ◽  
Limiting Factor ◽  
Kashmir Valley ◽  
Fertility Restorer ◽  
Yield And Quality ◽  
Restorer Genes ◽  
Increase Productivity ◽  
Fertility Restorers ◽  
Selection Of

Rice being a staple food crop of Kashmir valley, the focus is on enhancement of yield in order to meet the needs of ever-growing population.Identification of new parental lines is crucial for developing ecology-specific hybrids with ideal agronomic performance. Exploitation of heterosis in the form of hybrid rice technology can be one of the approaches to increase productivity in this crop, especially exploiting diversity among japonica lines can serve as an excellent route.A number of CMS lines suitable formountainous areas of Kashmir have been developed, however, the availability of promising restorer lines remains to be the major limitation for utilization of these lines.Identification of potential restorers acts as the main limiting factor for hybrid development in the Kashmir valley. Marker based screening for Rf3 and Rf4 fertility restorer genes can be helpful in rapid selection of restorer lines while dealing with the large quantity of genetic materials. In the present study, 100 rice germplasm were screened with the help of SSR markers, RM3148 and RM6100linked to Rf3 and Rf4 genes on chromosome 1 and 10, respectively. In total, 19 lines revealed the presence of both Rf3 and Rf4 genes. These lines amplified fertility restorer specific alleles for both the genes and may serve as potential restorers for obtaining heterotic rice hybrids. Further the germplasm lines were also evaluated for yield and quality traits.The present results would help in selection of suitable restorers along with preferred grain shape/size.

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