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Laxmi Prasad Upadhyaya, Naresh Pandey, Laxman Khanal,
Volume 4, Issue 1 (3-2022)
Abstract

The Kathmandu Valley, encompassing the capital city of Nepal, is one of the fastest growing metropolitan areas in South Asia. Rapid population growth and urbanization in Kathmandu have degraded the urban environment affecting the native biota. Therefore, a detailed assessment of avian species richness and its distribution in potential green spaces of the Kathmandu Valley is essential. We assessed the avian diversity in different habitats of the Tribhuvan University area, a potential refuge for birds in the urban landscape, by the point count method in the winter and summer of 2020. A total of 71 bird species from 39 genera and 32 families comprising 10 orders - ‘including the globally endangered Steppe eagle (Aquila nipalensis)’ - were recorded. Of the 10 orders, Passeriformes (44 species), had the highest richness followed by Columbiformes, Piciformes and Cuculiformes (with four species in each). Among the feeding guilds, the insectivorous guild (with 28 species) had the highest species richness followed by omnivores and carnivores. A higher Shannon’s diversity index was recorded in forest habitats (3.51) than built-up areas (3.45) or farmland (3.42). Despite the small size, our study has shown that the Tribhuvan University area is an important greenspace for birds in the Kathmandu Valley. An extensive exploration, monitoring and management of greenspaces are crucial for maintaining the ecological integrity of the urban landscape of the Kathmandu Valley.

Shalini Tudu, Amith S J, Chetan Nag K.s.,
Volume 6, Issue 1 (3-2024)
Abstract

In this Anthropocene epoch, where every single ecosystem on Earth is heavily shaped, both in space and time, by human deeds, natural landscapes are being rapidly replaced by urbanization. Henceforth, a new urban biome has arisen displaying certain unique properties, making cities around the globe a perfect place to investigate “natural” processes like ecology, evolution, adaptation, and biodiversity, away from their more natural forested counterparts. Interestingly, despite conurbations, or extended urban habitats, being thought of as adversaries of Mother Nature, organisms in urban environments are learning to adapt and survive, making them novel sources for evolutionary variation. Regrettably, despite advancements in methods to answer questions in ecology and evolutionary biology, there is a lack of knowledge about how urbanization influences evolution and its processes in an urban milieu. There is a dire need to understand issues such as the operational repercussions of urbanization, and the roles of evolutionary transformation in urban community dynamics.


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