Publications by authors named "Rajarshi Dasgupta"

Article Synopsis
  • Blue carbon cycling in mangrove ecosystems is more intricate than initially believed, prompting the use of structural equation modeling (SEM) for a deeper analysis.
  • The study utilized data from the Indian Sundarban to illustrate how SEM effectively integrates different data types to understand CO fluxes in mangroves, including key interactions between the atmosphere, water, and soil.
  • Findings indicate that atmospheric, water, and soil temperatures significantly drive CO emissions from mangrove ecosystems, demonstrating the utility of SEM in capturing complex biogeochemical cycles in blue carbon environments.
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Climate change-induced frequent cyclones are pumping saline seawater into the Sundarbans. Fani, Amphan, Bulbul, and Yaas were the major cyclones that hit the region during 2019-2021. This study represents the changes in the soil parameters, mangrove biodiversity and zonation due to the cyclone surges in the Indian Sundarbans between 2017 and 2021.

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Forest ecosystems play an indispensable role in addressing various pressing sustainability and social-ecological challenges such as climate change, biodiversity loss, and ecosystem services deterioration, hence the monitoring of the world's forests is crucial. As part of the global forest assessment workflow, a forest is generally classified and mapped based on land use and/or using a tree canopy cover threshold. In this paper, we examine the limitations of this approach and argue that the use of a land use-based forest definition and tree canopy cover thresholds can overlook forest degradation and enhancement, disguise the actual status of forest landscapes, and misinform management planning.

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The novel coronavirus (SARS-CoV-2) is the third coronavirus this century to threaten human health, killing more than two million people globally. Like previous coronaviruses, SARS-CoV-2 is suspected to have wildlife origins and was possibly transmitted to humans via wet markets selling bushmeat ( harvested wild meat). Thus, an interdisciplinary framework is vital to address the nexus between bushmeat, wet markets, and disease.

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Globally, shifting cultivation is known to be an important driver of tropical deforestation. However, in this paper, we argue that it can be sustainably managed if the environmental boundary conditions, laid by the traditional customs and practices, are fully respected. We narrate an empirical study from the Zunheboto district of Nagaland, India, where we deployed a mixed research method to explore the Indigenous and Local Knowledge and Practices (ILKPs) associated with shifting cultivation (aka Jhum), particularly concerning farm-level practices, forest and biodiversity conservation, and disaster risk reduction measures.

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Just a few decades ago, Adyar River in India's city of Chennai was an important source of water for various uses. Due to local and global changes (e.g.

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While Southeast Asia's forests play important roles in biodiversity conservation and global carbon (C) balance, the region is also a deforestation hotspot. Here, we consider the five shared socioeconomic pathways (SSPs) to portray a range of plausible futures for the region's forests, employing a state-of-the-art land change modelling procedure and remotely sensed data. We find that by 2050 under the worst-case scenario, SSP 3 (regional rivalry/a rocky road), the region's forests would shrink by 5.

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Article Synopsis
  • This report discusses the synthesis and characterization of three dinuclear gold(I) complexes with specific ligands and their structural analysis using X-ray methods.
  • The complexes were studied to evaluate how different substituents on the ligands affect their photophysical properties, particularly luminescence.
  • Results showed strong intramolecular interactions between gold atoms and excellent luminescence performance with varying emission colors and high quantum yields.
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The [3 + 2] cycloaddition reaction of phosphanyl aminoborane [N(2,6-iPrCH)(PPh)(BCy)] (1) with activated alkynes led to boron and phosphorus containing five-membered heterocycles [(2,6-iPrCH)NPPh(COR)C-C(Cy)(COR)(BCy)] [R = Me (2), Et (3) and H (4)] with facile cleavage of the B-C bond and concomitant formation of a P-C bond with an ylidic character. DFT calculations indicate that 1 can be considered as a non-conjugated 1,3-dipole having two reaction centers viz., a nucleophilic P-center and an electrophilic B-center.

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The reactivity of structurally identical silylene and stannylene [PhC(NtBu)EN(SiMe)] (E = Si (1) and Sn (2)) towards coinage metals has been explored. While 1 has the propensity to form an adduct with coinage metals (4 and 5), 2 undergoes a ligand exchange reaction with copper halides and silver triflate leading to PhC(NtBu)SnX (X = Br (6), Cl (7), and OSOCF (8)) with concomitant formation of [M{N(SiMe)}] (M = Cu, Ag). However, with AgSbF both 1 and 2 led to ion pairs, 9·SbFand 10·SbF displaying weaker Ag·F interactions in the latter.

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Most studies on roadside soil pollution have been performed in areas where petrol is the main fuel. Very little work has been conducted in regions where diesel predominates. We collected soil samples from four sites that span a precipitation gradient along the Manali-Leh Highway in northwestern Himalaya, India.

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