Browsing by Author "Shakti Om Pathak"

Now showing 1 - 2 of 2

Assessing soil organic carbon and its relation with biophysical and ecological parameters in tropical forest ecosystem India
(Taylor and Francis Ltd., 2025) Haroon Sajjad; Pavan Kumar; Prashant Kumar Srivastava; Shakti Om Pathak; Meraj Ahmed; Vikas Kumar; Manmohan J.R. Dobriyal; Preeti Kumari; Prem C. Pandey
Organic matter in soil is an essential parameter for assessing the agrodynamic productivity of soils. Forest productivity and health largely depend on soil organic carbon (SOC). This study aims to assess SOC levels and analyze their relationship with biophysical parameters in tropical forests. SOC was predicted using normalized difference vegetation index (NDVI) values derived from Sentinel-2A imagery. A total of 30 samples were collected through stratified random sampling based on NDVI values to estimate SOC. Regression analysis was performed between the estimated and predicted SOC, showing a strong correlation. The results indicated that SOC decreased with increasing soil depth in the Sariska Tiger Reserve, ranging from 8.27 - 26.54 t/ha at 5 cm depth and 1.9- 12.4 t/ha at 10 cm depth. NDVI was positively correlated with SOC, while the Bare Soil Index (BSI) showed a negative correlation. Additionally, soil pH and SOC were positively correlated, indicating high SOC levels. © 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Occurrence of emerging contaminants in soils and impacts on rhizosphere
(Elsevier, 2024) Shiv Vendra Singh; Nidhi Luthra; Sayantika Bhattacharya; Anurag Bera; Diksha Pande; Debarati Datta; Rashmi Sharma; Shakti Om Pathak
Emerging contaminants (ECs) encompass both natural and synthetic chemicals that are present or transformed to new chemical compounds across the globe. These pollutants are frequently found in water bodies at very low concentration being contributed by various types of pharmaceuticals, cosmetics, cleaning agents, daily use plastic products, industrial effluents, residual pesticides, nanomaterials, narcotics, etc. The polyfluoroalkyl substances, micro/nanoplastics, biphenyl, phthalate esters, pharmaceuticals, personal care products, pesticides, nanoparticles, etc. are being broadly covered under such categories that are imposing negative effects on freshwater sources, rhizosphere soil quality, and human and earth ecosystem. Since contamination has become a challenge for environmental protection, a variety of municipal, national, international, and intergovernmental environmental protection groups are developing policies to control ECs. Despite mounting evidence of the rising risks posed by new pollutants is becoming available, research and understanding are relatively restricted while very less is known about their buildup in rhizosphere and plants bioaccumulation. This chapter primarily emphasizes the diversity of ECs accumulating into the rhizosphere, their fates/transport, and claimed significant impact on rhizospheric health. © 2024 Elsevier Inc. All rights reserved.