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Author Peng, J.; Lin, H.; Chen, Y.; Blaschke, T.; Luo, L.; Xu, Z.; Hu, Y.’na; Zhao, M.; Wu, J. url  doi
openurl 
  Title Spatiotemporal evolution of urban agglomerations in China during 2000–2012: a nighttime light approach Type Journal Article
  Year 2020 Publication Landscape Ecology Abbreviated Journal Landscape Ecol  
  Volume 35 Issue 2 Pages 421-434  
  Keywords Remote Sensing  
  Abstract (up) Context

Urban agglomeration is an advanced spatial organization of cities, usually caused by urbanization processes when cities develop to a certain level – typically associated with higher population density and a certain density of built environment. However, compared with various studies focusing on specific cities, urban agglomerations are still understudied, especially for the quantitative identification of spatiotemporal evolution of urban agglomerations.

Objectives

This study aims to identify the boundary of urban agglomerations in China from 2000 to 2012, and to explore the temporal evolution and spatial difference of urban agglomerations.

Methods

Firstly, the core zone of urban agglomerations was identified using an appropriate threshold of the digital number (DN) of nighttime light. Secondly, the mean patch area and gravity model were used to determine the affected zone of urban agglomerations. Thirdly, spatiotemporal contrast was conducted focusing on the 23 main urban agglomerations in China.

Results

By 2012, the most highly developed Yangtze River Delta and Pearl River Delta urban agglomerations met the standard of world level, with the Beijing–Tianjin–Hebei urban agglomeration for regional level, as well as 11 urban agglomerations for sub-regional level. Regional differences in urban agglomerations between southern and northern China, or between coastal and inland China remained stable over the study period of 2000–2012. Compared with the western urban agglomerations, the outward expansion of eastern urban agglomerations decelerated. From 2000 to 2012, the overall development mode of urban agglomerations shifted from the core-expansion to the peripheral-development, together with slower expansion of urban agglomerations after 2006.

Conclusions

Nighttime light data are effective in exploring the spatiotemporal evolution of urban agglomerations.
 
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0921-2973 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 3131  
Permanent link to this record
 

 
Author Almpanidou, V.; Tsapalou, V.; Tsavdaridou, A.I.; Mazaris, A.D. url  doi
openurl 
  Title The dark side of raptors’ distribution ranges under climate change Type Journal Article
  Year 2020 Publication Landscape Ecology Abbreviated Journal Landscape Ecol  
  Volume 35 Issue 6 Pages 1435-1443  
  Keywords Animals; Remote sensing  
  Abstract (up) Context

Artificial light at night (ALAN) represents a significant threat to biodiversity. Given that protected areas (PAs) are in relative darkness compared to the surrounding sites, they could be considered an effective tool towards eliminating the impacts of ALAN. However, the extent to which climate change-induced shifts would drive species out of PAs and thus, alter their exposure to ALAN remains an open question.

Objectives

We assessed the extent and protection coverage of dark areas across the current and future distributions of 39 raptor species of European conservation interest.

Methods

We initially developed a set of distribution models using current and projected climatic variables. Next, we used a satellite dataset of nighttime lights composite to determine the spread of ALAN within the raptors’ ranges. Finally, we applied three indices of proportional changes in the expansion of suitable habitats and dark areas to quantify patterns in ALAN within the current and future raptors’ ranges across Europe.

Results

Our analyses revealed that potential future distribution shifts of raptors will lead to changes in the exposure of species to ALAN, with these patterns being rather unfavourable for most of them. Still, PAs in Europe were found to offer a relative high proportion of dark areas which overlap with the current and future raptors range.

Conclusions

Our findings provided some first insights into the spatial conflict between species ranges and ALAN, considering potential distribution shifts driven by climate change. The proposed methodology offers the means to identify potential dark refugia towards prioritizing conservation actions.
 
  Address  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0921-2973 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number UP @ altintas1 @ Serial 3157  
Permanent link to this record
 

 
Author Voigt, C.C., Scholl, J.M., Bauer, J. et al. url  doi
openurl 
  Title Movement responses of common noctule bats to the illuminated urban landscape Type Journal Article
  Year 2020 Publication Landscape Ecology Abbreviated Journal  
  Volume 35 Issue Pages 189-201  
  Keywords Animals  
  Abstract (up) Context

Cities are a challenging habitat for obligate nocturnal mammals because of the ubiquitous use of artificial light at night (ALAN). How nocturnal animals move in an urban landscape, particularly in response to ALAN is largely unknown.

Objectives

We studied the movement responses, foraging and commuting, of common noctules (Nyctalus noctula) to urban landscape features in general and ALAN in particular.

Methods

We equipped 20 bats with miniaturized GPS loggers in the Berlin metropolitan area and related spatial positions of bats to anthropogenic and natural landscape features and levels of ALAN.

Results

Common noctules foraged close to ALAN only next to bodies of water or well vegetated areas, probably to exploit swarms of insects lured by street lights. In contrast, they avoided illuminated roads, irrespective of vegetation cover nearby. Predictive maps identified most of the metropolitan area as non-favoured by this species because of high levels of impervious surfaces and ALAN. Dark corridors were used by common noctules for commuting and thus likely improved the permeability of the city landscape.

Conclusions

We conclude that the spatial use of common noctules, previously considered to be more tolerant to light than other bats, is largely constrained by ALAN. Our study is the first individual-based GPS tracking study to show sensitive responses of nocturnal wildlife to light pollution. Approaches to protect urban biodiversity need to include ALAN to safeguard the larger network of dark habitats for bats and other nocturnal species in cities.
 
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  Notes Approved no  
  Call Number IDA @ intern @ Serial 2961  
Permanent link to this record
 

 
Author Laforge, A., Pauwels, J., Faure, B., Bas, Y., Kerbiriou, C., Fonderflick, J., & Besnard, A. url  doi
openurl 
  Title Reducing light pollution improves connectivity for bats in urban landscapes Type Journal Article
  Year 2019 Publication Landscape Ecology Abbreviated Journal  
  Volume Issue Pages 1-17  
  Keywords Animals  
  Abstract (up) Context

Light pollution can alter animal movements and landscape connectivity. This is particularly true in urban landscapes where a need to incorporate conservation issues in urban planning is urgent.

Objectives

We investigated how potential light-reduction scenarios at conurbation scale change landscape connectivity for bats.

Methods

Through random stratified sampling and species distribution modelling, we assessed the relative importance of light pollution on bat presence probability and activity. We recorded bats during one entire night on each 305 sampling points in 2015. In 2016, we surveyed 94 supplementary points to evaluate models performance. We used our spatial predictions to characterize landscape resistance to bat movements. Then we applied a least-cost modelling approach to identify nocturnal corridors and estimated the impact of five light-reduction scenarios on landscape connectivity for two light non-tolerant bat species.

Results

We found that light pollution detected from satellite images was a good predictor of bat presence and activity up to 700 m radius. Our results exhibited contrasting responses to average radiance: M. daubentonii responded negatively, P. nathusii had a positive response for low values then a negative response after a threshold radiance value of 20 W.m−2.sr−1 and E. serotinus responded positively. Five and four light-reduction scenarios significantly improved landscape connectivity for M. daubentonii and P. nathusii respectively.

Conclusions

Light-reduction measures should be included in urban planning to provide sustainable conditions for bats in cities. We advocate for the use of our methodological approach to further studies to find the best trade-off between conservation needs and social acceptability.
 
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  Series Editor Series Title Abbreviated Series Title  
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  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ intern @ Serial 2345  
Permanent link to this record
 

 
Author Buxton, R.T.; Seymoure, B.M.; White, J.; Angeloni, L.M.; Crooks, K.R.; Fristrup, K.; McKenna, M.F.; Wittemyer, G. url  doi
openurl 
  Title The relationship between anthropogenic light and noise in U.S. national parks Type Journal Article
  Year 2020 Publication Landscape Ecology Abbreviated Journal Landscape Ecol  
  Volume 35 Issue 6 Pages 1371-1384  
  Keywords Remote Sensing; Conservation; Skyglow  
  Abstract (up) Context

Natural sound and light regulate fundamental biological processes and are central to visitor experience in protected areas. As such, anthropogenic light and noise have negative effects on both wildlife and humans. While prior studies have examined the distribution and levels of light or noise, joint analyses are rarely undertaken despite their potentially cumulative effects.

Objectives

We examine the relationship between different types of anthropogenic light and noise conditions and what factors drive correlation, co-occurrences, and divergence between them.

Methods

We overlaid existing geospatial models of anthropogenic light and noise with landscape predictors in national parks across the continental U.S.

Results

Overlapping dark and quiet were the most common conditions (82.5–87.1% of park area), representing important refuges for wildlife and human experience. We found low correlation between anthropogenic light and noise (Spearman’s R < 0.25), with the exception of parks with a higher density of roads. Park land within urban areas had the highest probability of co-occurring high light and noise exposure, while park areas with divergent light and noise exposure (e.g., high light and low noise) were most commonly found 5–20 km from urban areas and in parks with roads present.

Conclusions

These analyses demonstrate that light and noise exposure are not always correlated in national parks, which was unexpected because human activities tend to produce both simultaneously. As such, mitigation efforts for anthropogenic light and noise will require efforts targeting site-specific sources of noise and light. Protecting and restoring sensory environments will involve constructive partnerships capable of reconciling diverse community interests.
 
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0921-2973 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number UP @ altintas1 @ Serial 3155  
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