Papers by Sk Vazeed Pasha
Remote sensing is an indispensable tool for assessing and monitoring land use/land cover changes ... more Remote sensing is an indispensable tool for assessing and monitoring land use/land cover changes and supports in planning appropriate conservation measures. This study has analysed the status and distribution of different land use/land cover from 1977 to 2015 and identified the land use/ land cover change hotspots in Gulf of Kachchh region, India.
The total mangrove area has increased from 140.5 km2 to
700.2 km2 from 1977 to 2015. Among all the different time
periods the highest rate of mangrove expansion was found
between 2008 to 2011. The results indicate that during the past
four decades, mangrove, salt pans and built-up land have been
increased by 79.9 %, 84 % and 93.8 % respectively. About
21.4 km2 of mangroves was converted to salt pans and builtup
land from 1977 to 2015. Annual rate of afforestation was
estimated as 7.01, 12.58, 16.03 and 4.73 for 1999–2006, 2006–
2008, 2008–2011 and 2011–2015. Hotspot analysis has identified
33 positive and 11 negative change land cover hotspots in
Gulf of Kachchh. Strict management policies are required to
prevent further loss of mangroves and conservation of ecologically unique ecosystem of Gulf of Kachchh.
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Achyranthes coynei Santapau (Amaranthaceae) is an endemic and red listed species of
India. It was... more Achyranthes coynei Santapau (Amaranthaceae) is an endemic and red listed species of
India. It was recorded for the first time from Kachchh biosphere reserve and forms new distributional
record for the Indian Desert region and Gujarat state. It is being described along with field
photographs to facilitate easy identification of the taxon.
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Wild Ass Wildlife Sanctuary is one of the largest wildlife sanctuaries in India represents ‘India... more Wild Ass Wildlife Sanctuary is one of the largest wildlife sanctuaries in India represents ‘Indian wild ass’ (Equus hemionus khur), an endangered desert mammal of the world. The present study has found desert mammals are supporting rapid invasion of Mesquite (Prosopis juliflora). Multi-temporal satellite images of 1977–2011 have been used for spatial quantification of Mesquite. The annual expansion rate of Mesquite cover has been estimated between 1.66 and 6.87 during the studied phases indicates significant threat to indigenous biodiversity.
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Conservation of biodiversity has been put to the highest priority throughout the world. The proce... more Conservation of biodiversity has been put to the highest priority throughout the world. The process of identifying threatened ecosystems will search for different drivers related to biodiversity loss. The present study aimed to generate spatial information on deforestation and ecological degradation indicators of fragmentation and forest fires using systematic conceptual approach in Telangana state, India. Identification of ecosystems facing increasing vulnerability can help to safeguard the extinctions of species and useful for conservation planning. The technological advancement of satellite remote sensing and Geographical Information System has increased greatly in assessment and monitoring of ecosystem-level changes. The areas of threat were identified by creating grid cells (5 × 5 km) in Geographical Information System (GIS). Deforestation was assessed using multi-source data of 1930, 1960, 1975, 1985, 1995, 2005 and 2013. The forest cover of 40,746 km2, 29,299 km2, 18,652 km2, 18,368 km2, 18,006 km2, 17,556 km2 and 17,520 km2 was estimated during 1930, 1960, 1975, 1985, 1995, 2005 and 2013, respectively. Historical evaluation of deforestation revealed that major changes had occurred in forests of Telangana and identified 1095 extinct, 397 critically endangered, 523 endangered and 311 vulnerable ecosystem grid cells. The fragmentation analysis has identified 307 ecosystem grid cells under critically endangered status. Forest burnt area information was extracted using AWiFS data of 2005 to 2014. Spatial analysis indicates total fire-affected forest in Telangana as 58.9 % in a decadal period. Conservation status has been recorded depending upon values of threat for each grid, which forms the basis for conservation priority hotspots. Of existing forest, 2.1 % grids had severe ecosystem collapse and had been included under the category of conservation priority hotspot-I, followed by 27.2 % in conservation priority hotspot-II and 51.5 % in conservation priority hotspot-III. This analysis complements assessment of ecosystems undergoing multiple threats. An integrated approach involving the deforestation and degradation indicators is useful in formulating the strategies to take appropriate conservation measures.
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The invasion of alien species is a significant threat to global biodiversity and the top driver o... more The invasion of alien species is a significant threat to global biodiversity and the top driver of climate
change. The present study was conducted in the Great Rann of Kachchh, part of Kachchh Biosphere
Reserve, Gujarat, India, which has been severely affected by invasion of Prosopis juliflora. The invasive
weed infestation has been identified using multi-temporal remote sensing datasets of 1977, 1990,
1999, 2005 and 2011. Spatial analyses of the transition matrix, extent of invasive colonies, patchiness,
coalescence and rate of spread were carried out. During the study period of three and half decades,
almost 295 km2 of the natural land cover was converted into Prosopis cover. This study has shown an
increment of 42.9% of area under Prosopis cover in the Great Rann of Kachchh, part of the Kachchh
Biosphere Reserve during 1977 to 2011. Spatial analysis indicates high occupancy of Prosopis cover
with most of the invasion (95.9%) occurring in the grasslands and only 4.1% in other land cover types.
The process of Prosopis invasion shows high patch initiation, followed by coalescence, indicating aggressive
colonization of species. The number of patches within an area of < 1 km2 increased from 1977 to
2011, indicating the formation of new Prosopis habitats by replacing the grasslands. The largest patch
of Prosopis cover increased from 144 km2 in 1977 to 430 km2 in 2011. The estimated mean patch size
was 7.8 km2 in 1977. The mean patch size was largest during 2011, i.e., 9 km2
. The annual spread rate
for Prosopis has been estimated as 2.1% during 2005–2011. The present work has investigated the long
term changes in Prosopis cover in the Great Rann of Kachchh, part of Kachchh Biosphere Reserve.
The spatial database generated will be useful in preparing strategies for the management of Prosopis
juliflora.
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Papers by Sk Vazeed Pasha
The total mangrove area has increased from 140.5 km2 to
700.2 km2 from 1977 to 2015. Among all the different time
periods the highest rate of mangrove expansion was found
between 2008 to 2011. The results indicate that during the past
four decades, mangrove, salt pans and built-up land have been
increased by 79.9 %, 84 % and 93.8 % respectively. About
21.4 km2 of mangroves was converted to salt pans and builtup
land from 1977 to 2015. Annual rate of afforestation was
estimated as 7.01, 12.58, 16.03 and 4.73 for 1999–2006, 2006–
2008, 2008–2011 and 2011–2015. Hotspot analysis has identified
33 positive and 11 negative change land cover hotspots in
Gulf of Kachchh. Strict management policies are required to
prevent further loss of mangroves and conservation of ecologically unique ecosystem of Gulf of Kachchh.
India. It was recorded for the first time from Kachchh biosphere reserve and forms new distributional
record for the Indian Desert region and Gujarat state. It is being described along with field
photographs to facilitate easy identification of the taxon.
change. The present study was conducted in the Great Rann of Kachchh, part of Kachchh Biosphere
Reserve, Gujarat, India, which has been severely affected by invasion of Prosopis juliflora. The invasive
weed infestation has been identified using multi-temporal remote sensing datasets of 1977, 1990,
1999, 2005 and 2011. Spatial analyses of the transition matrix, extent of invasive colonies, patchiness,
coalescence and rate of spread were carried out. During the study period of three and half decades,
almost 295 km2 of the natural land cover was converted into Prosopis cover. This study has shown an
increment of 42.9% of area under Prosopis cover in the Great Rann of Kachchh, part of the Kachchh
Biosphere Reserve during 1977 to 2011. Spatial analysis indicates high occupancy of Prosopis cover
with most of the invasion (95.9%) occurring in the grasslands and only 4.1% in other land cover types.
The process of Prosopis invasion shows high patch initiation, followed by coalescence, indicating aggressive
colonization of species. The number of patches within an area of < 1 km2 increased from 1977 to
2011, indicating the formation of new Prosopis habitats by replacing the grasslands. The largest patch
of Prosopis cover increased from 144 km2 in 1977 to 430 km2 in 2011. The estimated mean patch size
was 7.8 km2 in 1977. The mean patch size was largest during 2011, i.e., 9 km2
. The annual spread rate
for Prosopis has been estimated as 2.1% during 2005–2011. The present work has investigated the long
term changes in Prosopis cover in the Great Rann of Kachchh, part of Kachchh Biosphere Reserve.
The spatial database generated will be useful in preparing strategies for the management of Prosopis
juliflora.
The total mangrove area has increased from 140.5 km2 to
700.2 km2 from 1977 to 2015. Among all the different time
periods the highest rate of mangrove expansion was found
between 2008 to 2011. The results indicate that during the past
four decades, mangrove, salt pans and built-up land have been
increased by 79.9 %, 84 % and 93.8 % respectively. About
21.4 km2 of mangroves was converted to salt pans and builtup
land from 1977 to 2015. Annual rate of afforestation was
estimated as 7.01, 12.58, 16.03 and 4.73 for 1999–2006, 2006–
2008, 2008–2011 and 2011–2015. Hotspot analysis has identified
33 positive and 11 negative change land cover hotspots in
Gulf of Kachchh. Strict management policies are required to
prevent further loss of mangroves and conservation of ecologically unique ecosystem of Gulf of Kachchh.
India. It was recorded for the first time from Kachchh biosphere reserve and forms new distributional
record for the Indian Desert region and Gujarat state. It is being described along with field
photographs to facilitate easy identification of the taxon.
change. The present study was conducted in the Great Rann of Kachchh, part of Kachchh Biosphere
Reserve, Gujarat, India, which has been severely affected by invasion of Prosopis juliflora. The invasive
weed infestation has been identified using multi-temporal remote sensing datasets of 1977, 1990,
1999, 2005 and 2011. Spatial analyses of the transition matrix, extent of invasive colonies, patchiness,
coalescence and rate of spread were carried out. During the study period of three and half decades,
almost 295 km2 of the natural land cover was converted into Prosopis cover. This study has shown an
increment of 42.9% of area under Prosopis cover in the Great Rann of Kachchh, part of the Kachchh
Biosphere Reserve during 1977 to 2011. Spatial analysis indicates high occupancy of Prosopis cover
with most of the invasion (95.9%) occurring in the grasslands and only 4.1% in other land cover types.
The process of Prosopis invasion shows high patch initiation, followed by coalescence, indicating aggressive
colonization of species. The number of patches within an area of < 1 km2 increased from 1977 to
2011, indicating the formation of new Prosopis habitats by replacing the grasslands. The largest patch
of Prosopis cover increased from 144 km2 in 1977 to 430 km2 in 2011. The estimated mean patch size
was 7.8 km2 in 1977. The mean patch size was largest during 2011, i.e., 9 km2
. The annual spread rate
for Prosopis has been estimated as 2.1% during 2005–2011. The present work has investigated the long
term changes in Prosopis cover in the Great Rann of Kachchh, part of Kachchh Biosphere Reserve.
The spatial database generated will be useful in preparing strategies for the management of Prosopis
juliflora.