Artificial light at night is a top predictor of bird migration stopover density

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Dec. 4, 2023

As billions of nocturnal avian migrants traverse North America, twice a year they must contend with landscape changes driven by natural and anthropogenic forces, including the rapid growth artificial glow night sky. While airspaces facilitate migrant passage, terrestrial landscapes serve as essential areas to restore energy reserves often act refugia-making it critical holistically identify stopover locations understand drivers use. Here, we leverage over 10 million remote sensing observations develop seasonal contiguous United States layers bird density. In 70% our models, skyglow highly influential consistently positive predictor migration density across States. This finding points potential an expanding threat migrants: peri-urban illuminated may ecological traps at macroscales that increase mortality birds during migration.

Language: Английский

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Health and environmental effects to wildlife from radio telemetry and tracking devices—state of the science and best management practices

Frontiers in Veterinary Science, Journal Year: 2024, Volume and Issue: 11

Published: March 6, 2024

This paper discusses the potential health risks and benefits to tagged wildlife from use of radio tracking, telemetry, related microchip data-logger technologies used study, monitor track mostly in their native habitats. Domestic pets, especially canids, are briefly discussed as radio-tagging devices also on/in them. Radio tracking uses very high frequency (VHF), ultra-high (UHF), global positioning system (GPS) technologies, including via satellites where platform terminal transmitters (PTTs) used, well geo-locating capabilities using satellites, radio-frequency identification (RFID) chips, passive integrated responder (PIT) tags, among others. Such have resulted cutting-edge findings worldwide that served protect better understand behaviors myriad species. As a result, scientists, field researchers, technicians, fish biologists managers, plus other veterinarian specialists, frequently opt for its without fully understanding ramifications target species behaviors. These include negative physiological effects electromagnetic fields (EMF) which many nonhuman exquisitely sensitive, direct placement/use-attachment impacts collars, transmitters, implants themselves. provides pertinent studies, suggests best management practices, compares currently available those considering and/or such technologies. The primary focus is on environmental risk/benefit decisions should come into play, ethical considerations, along with recommendations more caution communities before first place.

Language: Английский

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A nature tourism and citizen science alliance

BioScience, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Language: Английский

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Integrating multi-scale terrestrial and atmospheric predictors enhances nocturnal bird migration forecasts

Ornithological Applications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Abstract Our ability to forecast the spatial and temporal patterns of ecological processes at continental scales has drastically improved over past decade. Yet, predicting broad while capturing fine-scale is a central challenge forecasting given inherent tension between grain extent, whereby enhancing one often diminishes other. We leveraged 10 years terrestrial atmospheric data (2012–2021) develop high-resolution (2.9 × 2.9 km), radar-driven bird migration model for highly active region Mississippi flyway. Based on suite candidate models we examined, adding predictors performance only marginally, whereas spatially distant predictors, particularly air temperature wind speed from focal regions, were major contributors our top model, explaining 56% variation in regional activity. Among which ranked considerably lower than terms variable importance, vegetation phenology, artificial light night, percent forest cover most important predictors. Furthermore, scale this demonstrate capacity generate real-time, forecasts United States that explained up 65% national variation. study demonstrates an approach increasing resolution forecasts, could facilitate integration radar with other sources inform dynamic conservation efforts local more relevant threats, such as anthropogenic night.

Language: Английский

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Classification of Biological Scatters Using Polarimetric Weather Radar

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Journal Year: 2024, Volume and Issue: 17, P. 7436 - 7447

Published: Jan. 1, 2024

Weather radar holds the capability to monitor extensive migration of bird and insect species. In particular, polarimetric weather can enhance aerial ecological monitoring by quantifying target shape through measurement polarization moments. This paper introduces an intelligent algorithm classify using data. A image dataset was formed intentionally curating typical migratory data birds insects captured radar. Next, point features spatial texture were extracted from images in for training a classifier supervised learning approach, resulting classification accuracy 93.56%. Furthermore, importance analyzed, uncovering that most influential attribute reflectivity factor at 33.83%, surpassing cumulative influence other dual-polarization addition, textures also played essential role classifier, collectively weighing 35.65%. Lastly, proposed method validated with data, attaining level 95.36%.

Language: Английский

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The correlation betweeneBirdcommunity science and weather surveillance radar‐based estimates of migration phenology

Global Ecology and Biogeography, Journal Year: 2022, Volume and Issue: 31(11), P. 2219 - 2230

Published: July 13, 2022

Measuring avian migration can prove challenging given the spatial scope and diversity of species involved. No one monitoring technique provides all pertinent measures needed to capture this macroscale phenomenon - emphasizing need for data integration. Migration phenology is a key metric characterizing large-scale dynamics has been successfully quantified using weather surveillance radar (WSR) community science observations. Separately, both platforms have their limitations measure different aspects bird migration. We sought make formal comparison estimates derived from WSR eBird which we predict positive correlation.

Language: Английский

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Long-term citizen science data reveals environmental controls on tropical tree flowering at the regional scale

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: March 25, 2023

A bstract Tropical tree reproductive phenology is sensitive to changing climate, but inter-individual and interannual variability at the regional scale poorly understood. While large-scale long-term datasets of environmental variables are available, needs be measured in-site, limiting spatiotemporal scales data. We leveraged a unique dataset assembled by SeasonWatch, citizen-science monitoring programme in India assess correlates flowering three ubiquitous economically important species - jackfruit, mango tamarind south-western Indian state Kerala. explored possibility predicting (i) status any given time, knowing recent conditions, (ii) conditions that predict onset (iii) patterns these predictors aid future hypotheses for patterns. used 165006 observations spread over 19591 individual trees 9 years, fortnight preceding each observation derived from remotely sensed (ERA5-LAND) model using two statistical approaches machine learning generalised linear mixed models. found strong influences temperature rainfall on phenophase presence soil moisture minimum had high importance values under models presence/absence effects flowering. The effect time-varying factors, temperature, solar radiation, were also modified static like elevation, aspect, urbanisation. Taken together, our results show pervasive influence climate tropical its among years individuals. Our become increasingly face large heterogenous change this landscape other regions. demonstrate potential limitations making testing predictions predictive science landscapes. O pen R esearch S tatement Data already published publicly with those items properly cited submission. SeasonWatch data archived as Ramaswami (2022).

Language: Английский

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Inbound arrivals: using weather surveillance radar to quantify the diurnal timing of spring trans‐Gulf bird migration

Ecography, Journal Year: 2023, Volume and Issue: 2023(8)

Published: May 30, 2023

More than two billion birds migrate through the Gulf of Mexico each spring en route to breeding grounds in USA and Canada. This region has a long history complex natural anthropogenic environments as northern coast provides first possible stopover habitats for migrants making nonstop trans‐Gulf crossings during migration. However, intense activity region, which is expanding rapidly at present, makes vulnerable multitude obstacles increasingly fragments alters these habitats. Understanding timing migrants' overwater arrivals biological value our understanding migration ecology relative decision‐making flights, imperative advancing conservation this critical identification key times direct actions (e.g. temporary halting wind turbines, reduction light pollution). We explored 10 years weather surveillance radar data from five sites along quantify daily intensity arriving migrants. On scale, we found that migrant peaked an average nine hours after local sunrise, occurring earliest easternmost sites. seasonal level, greatest number occurred between late April early May, with peak latest westernmost Overall across all was decreased moving farther east. These findings emphasize differential spatial temporal patterns use by migrating birds, information essential improving supporting data‐driven approaches migratory passing region.

Language: Английский

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Citizen science data reveal possible multi-decadal phenological changes in the arrival time of a migratory tropical seabird species at the breeding ground

Marine Biology, Journal Year: 2023, Volume and Issue: 170(10)

Published: Aug. 30, 2023

Language: Английский

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Chasing and surfing seasonal waves: Avian migration through the US tracks land surface phenology in fall, but not spring

Journal of Animal Ecology, Journal Year: 2024, Volume and Issue: 93(7), P. 836 - 848

Published: May 13, 2024

Abstract Climate change is altering the timing of seasonal events for many taxa. There limited understanding how northward/southward songbird migration follows or by latitudinal progression transitions. Consistent environmental conditions that migrating birds encounter across latitudes likely represent correlate with important resources limiting factors migration. We tested whether migratory passage—observed via radar—consistently tracked land surface variables and phenophases in US Central Flyway both spring fall. The daily temperatures, precipitation vegetation greenness occurring on 10%, 50% 90% cumulative passage dates changed substantially latitude, indicating most migrants experienced rapidly changing as they headed north south. Temperature did not limit either season. Peak southern occurred nearly 40 days after green wave, northward growth, but caught up to green‐up at 48° N. Spring phenology may have evolved prioritize earlier arrival breeding. Across all latitudes, peak fall coincided same phenophase, an interval 26 prior dormancy onset. Migrants rely phenological during stopovers. Considering (a) a continental scale, (b) previous studies local scales demonstrated importance fruit stopover (c) fruiting North America later over time while advancing, potential mismatch between bird urgently needs further investigation.

Language: Английский

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