Spatial variations of bird occupancy in Delhi: The significance of woodland habitat patches in urban centres

Tiwary, Nawin Kumar; Urfi, Abdul Jamil

doi:10.1016/j.ufug.2016.10.002

Cited by 19 publications

(8 citation statements)

References 34 publications

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“…The highest adaptability potential of C. livia domestica was observed among invasive urban bird species. This bird was primarily an inhabitant of cliffs while urban area cliffs of building structures provide a substitute of natural cliffs (Tiwary & Urfi 2016).…”

Section: Discussionmentioning

confidence: 99%

Avian assemblage along an urban gradient: diversity, abundance and richness

et al. 2020

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Diversity in avian assemblages of urban (UR), peri-urban (PE) and rural (RU) areas was studied to explore variations in the avian community dynamics in rural – urban gradient. For this purpose, sampling was done from September 2013 to August 2015. A total of 35 sites, each covering an area of 300 m2 were sampled by using point count method. At each site, randomly three points (minimally 5 m apart from each other) were selected to study the birds. According to data, species richness (F2, 32=47.18, P<0.001) varied significantly along a rural-urban gradient. A significant difference in avian density per sampling site (F2, 32=105.41, P<0.001) was also observed along urbanization gradient. In PE and RU areas, avian assemblages were more diverse than UR areas. Among avian guilds, omnivores were the most abundant in UR while insectivores in PE areas. Frugivores and carnivores were abundant in RU areas. Granivores were recorded in all habitats with similar diversity. A close association was recorded in bird density of RU and PE areas than UR areas. Bird species richness and diversity showed negative correlation with built area and positive correlation with vegetation cover in an area.

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Section: Discussionmentioning

confidence: 99%

Avian assemblage along an urban gradient: diversity, abundance and richness

et al. 2020

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“…Our study highlights the combination of occupancy modelling of focal species with network connectivity analysis to identify key habitat patches for conservation prioritization. Species distribution modelling (SDM) has been frequently used to quantify environment-species relationships and generate suitability habitat maps [77] to guide urban wildlife protection and biodiversity conservation (e.g., [32,78]). The habitat network connectivity has hardly been investigated after suitable habitat has been delineated using SDM (except for [22,48,79]).…”

Section: Discussionmentioning

confidence: 99%

Prioritizing Green Spaces for Biodiversity Conservation in Beijing Based on Habitat Network Connectivity

Yang

Wielstra

et al. 2019

Sustainability

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Rapid urbanization results in changes in land use, biogeochemical cycles, climate, hydrosystems, and biodiversity. Policy-makers have formulated ecological protection measures to facilitate sustainable development. However, traditional conservation planning mainly focuses on protecting specific green spaces, with limited consideration of the connectivity among green spaces from a habitat network perspective. Using citizen science data and occupancy modelling, we predicted habitat suitability, built habitat networks and identified key habitat patches based on their contribution to the functional connectivity of the habitat network for three focal water, forest, and open-habitat bird species. Based on the habitat requirement, small waterbodies and intermediate forest and open-habitat cover facilitate preserving water, forest and open-habitat birds. In regards to the network analysis, we found that key habitat patches with a high conservation priority were generally characterized by a relatively large patch size and/or located at critical positions in the habitat network (at central positions in the habitat network, or near large patches). We suggest that key habitat patches in restricted built-up areas are converted to protected areas or are kept as cropland under future urban planning. We emphasize the usefulness of the focal species concept in urban biodiversity conservation. Our study offers conservation recommendations from a habitat network perspective for urban planners to safeguard urban biodiversity and ecosystem health.

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“…Isolation from other green patches is also found to affect bird communities due to possible constraints on dispersal (Shackleton 2016). Bird occupancy in urban areas is widely found to vary with the green cover in the proximate area (Tiwary and Ur 2016). Birds also respond to the socioeconomic conditions of the residential areas, as patterns of street tree planting often depend on these conditions (Wood and Esaian 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Although the negative effects of urbanization on biodiversity are widely prevalent, it may be possible to retain high biodiversity in urban areas with proper planning and urban design (Marzluff and Ewing 2008;Garrard et al 2018). Remnant woodlands, managed parks and home gardens, can contribute immensely to urban biodiversity, through their provision of natural and semi-natural habitats (Tiwary and Ur 2016). Along with parks, remnant woodlands and wetlands, street trees are one of the critical components of urban areas that expand habitat for fauna.…”

Section: Introductionmentioning

confidence: 99%

Micro-scale Patterns and Drivers of Bird Visitation on Street Fig Trees in Delhi, India

Rawal

Chatrath

Shahabuddin

2022

Preprint

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Street trees have been used as a means of mitigating the negative effects of urbanization on biodiversity, particularly bird fauna. Despite their widely acknowledged benefits for birds, studies so far have been largely limited to relatively coarse scales, with an understanding of the role of local environments and individual tree characters lacking. We studied the patterns of bird visitation at individual street Ficus (fig) trees, providers of keystone resources in tropical landscapes, in Delhi, India, and their drivers at different scales (tree characteristics, local and landscape variables). Three common fig species were surveyed for bird visitors across 3 sites with varying urban patterns. Fig trees were found to be a relatively common street tree choice, and the 106 trees surveyed were visited by 29 bird species, including 7 obligate frugivores. We found that reducing green cover in surrounding landscape and increasing noise did not deter birds from visiting these trees. Instead, variables at finer scales like tree canopy diameter, tree species and local resource density had sizable and significant effects on both species richness and abundance of bird visitors. Our results highlight how bird assemblages, guilds and individual species respond differently to a range of ecological variables, and an understanding of these responses at different scales is useful for maximising the value of street trees for urban birds. Thus, coarse-scale studies can provide insights into bird diversity of city landscapes, but micro-scale studies are important in helping make fine scale management decisions, like selection of street trees.

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Spatial variations of bird occupancy in Delhi: The significance of woodland habitat patches in urban centres

Cited by 19 publications

References 34 publications

Avian assemblage along an urban gradient: diversity, abundance and richness

Avian assemblage along an urban gradient: diversity, abundance and richness

Prioritizing Green Spaces for Biodiversity Conservation in Beijing Based on Habitat Network Connectivity

Micro-scale Patterns and Drivers of Bird Visitation on Street Fig Trees in Delhi, India

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