Correspondence of butterfly and host plant diversity: Foundation for habitat restoration and conservation

At a spatial scale, the diversity of butterflies varies with numerous factors including the availability of the host plant species. In parity with this proposition, the correspondence of diversity of butterfly and plant in the background of the urban–rural gradient was evaluated using Kolkata, India, as a model study area. The results reveal significant positive correlation between the diversity of butterflies and the plants, with the different values for the suburban, rural, and urban areas. Identification of the butterfly loads for the plants in the respective areas can be useful in enhancing the conservation of the butterflies through enhanced plantation of the concerned plant species. Alternatively, the disclosure of the generalist and specialist pattern of the plant species preference by the butterflies may be useful in enhancing the population of the respective species in the concerned areas. The conservation strategy for butterfly species may be refined through the use of both or any one of the quantitative assessment of the butterfly–plant links in the urban–rural gradient in Kolkata, India, and similar places in the world

Exploring the plant–aphid–ant interaction

Different species interact with each other in complex and diverse ways. Why and how do we study these interspecies interactions? How do we introduce students to these interactions through real-world observations of plants, aphids, and ants from their own backyards

Chloroplast Genome of Lithocarpus dealbatus (Hook.f. & Thomson ex Miq.) Rehder Establishes Monophyletic Origin of the Species and Reveals Mutational Hotspots with Taxon Delimitation Potential

There is phylogenetic ambiguity in the genus Lithocarpus and subfamily Quercoideae (Family: Fagaceae). Lithocarpus dealbatus, an ecologically important tree, is the dominant species among the Quercoideae in India. Although several studies have been conducted on the species’ regeneration and ecological and economic significance, limited information is available on its phylo-genomics. To resolve the phylogeny in Quercoideae, we sequenced and assembled the 161,476 bp chloroplast genome of L. dealbatus, which has a large single-copy section of 90,732 bp and a small single-copy region of 18,987 bp, separated by a pair of inverted repeat regions of 25,879 bp. The chloroplast genome contained 133 genes, of which 86 were protein-coding genes, 39 were transfer RNAs, and eight were ribosomal RNAs. Analysis of repeat elements and RNA editing sites revealed interspecific similarities within the Lithocarpus genus. DNA diversity analysis identified five highly diverged coding and noncoding hotspot regions in the four genera, which can be used as polymorphic markers for species/taxon delimitation across the four genera of Quercoideae viz., Lithocarpus, Quercus, Castanea, and Castanopsis. The chloroplast-based phylogenetic analysis among the Quercoideae established a monophyletic origin of Lithocarpus, and a closer evolutionary lineage with a few Quercus species. Besides providing insights into the chloroplast genome architecture of L. dealbatus, the study identified five mutational hotspots having high taxon-delimitation potential across four genera of Quercoideae

A mode of production flux: the transformation and reproduction of rural class relations in lowland Nepal and North Bihar

The Eastern Gangetic Plains of South Asia represents a peripheral region far from the centers of global capitalist production, and this is all the more apparent in Mithilanchal, a cultural domain spanning the Nepal/Bihar border. The agrarian structure can be considered ‘semi-feudal’ in character, dominated by landlordism and usury, and backed up by political and ideological processes. Paradoxically, Mithilanchal is also deeply integrated into the global capitalist market and represents a surplus labor pool for the urban centers of Western India as well as the Persian Gulf in a classic articulation between pre-capitalist and capitalist modes of production. A review of the changes in the agrarian structure over recent decades in the context of globalisation, out-migration and climate stress, shows that while landlordism remains entrenched, the relationship between the marginal and tenant farmer majority and the landed classes has changed, with the breakdown of ideological ties and reduced dependence on single landlords. The paper thus ends on a positive note, as the contemporary juncture represents an opportune moment for new avenues of political mobilization among the peasantry