Copernicus Global Land Cover Layers—Collection 2

Buchhorn, Marcel; Lesiv, Myroslava; Tsendbazar, Nandin‐Erdene; Herold, Martin; Bertels, Luc; Smets, Bruno

doi:10.3390/rs12061044

Cited by 717 publications

(582 citation statements)

References 37 publications

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“…As a proxy for habitat density, we used tree cover data from Collection 2 of the Copernicus Global Land Cover project (Buchhorn et al 2020). For each geographic location of a song recording, we extracted the percentage of tree cover in a 100 × 100 metres quadrant using the exactextractr package (v.0.2.1) in R (Baston 2020).…”

Section: Habitat Densitymentioning

confidence: 99%

A global analysis of song frequency in passerines provides no support for the acoustic adaptation hypothesis but suggests a role for sexual selection

Mikula

Vâlcu

Brumm

et al. 2020

Preprint

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AbstractMany animals use acoustic signals for communication, implying that the properties of these signals can be under strong selection. The acoustic adaptation hypothesis predicts that species living in dense habitats emit lower-frequency sounds than those in open areas, because low-frequency sounds generally propagate further in denser vegetation. Signal frequency may also be under sexual selection, because it correlates with body size and lower-frequency sounds are perceived as more intimidating. Here, we evaluate these hypotheses by analysing variation in peak song frequency across 5,085 passerine species (Passeriformes). A phylogenetically-informed analysis revealed that song frequency decreases with increasing body mass and with male-biased sexual size dimorphism. However, we found no support for the predicted relationship between frequency and habitat. Our results suggest that the global variation in passerine song frequency is mostly driven by natural and sexual selection causing evolutionary shifts in body size rather than by habitat-related selection on sound propagation.Statement of authorshipTA and PM conceived and designed the study with input from all authors. TA and BK coordinated the study. PM collected the song data. MV performed the statistical analyses with input from WF. MB made the figures with help from MV and PM. TP and HB provided bioacoustic expertise. PM drafted the first version of the manuscript. TA, BK and PM revised and finalized the manuscript with input from all authors.Data availability statementThe data used in this study were collected from publicly available databases. All data and computer code used to generate the results, as well as supplementary figures and tables will be freely available at https://osf.io/fa9ky/.

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Section: Habitat Densitymentioning

confidence: 99%

A global analysis of song frequency in passerines provides no support for the acoustic adaptation hypothesis but suggests a role for sexual selection

Mikula

Vâlcu

Brumm

et al. 2020

Preprint

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“…The datasets were derived based on a multi-year and multisensor strategy of MERIS and SPOT-Vegetation time series, continued under the Copernicus Climate Change Service (C3S), implemented by the European Centre for Medium-Range Weather Forecasts (ECMWF) on behalf of the European Commission, in order to assure continuity. At C3S Climate Data Store (CDS), 27 land cover datasets (from 1992 to 2018) are available for download, used for climate modelling, urban expansion [106][107] or UHI [74]. Figure 3 illustrates the relationship between LST and land cover based on the CCI-LC dataset.…”

Section: Land Covermentioning

confidence: 99%

Meteorological and Ancillary Data Resources for Climate Research in Urban Areas

Cheval

Micu

Dumitrescu

et al. 2020

Climate

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An increasing plethora of both meteorological and ancillary data are presently available for climate research and applications in urban areas. The data are often held by local or national institutions (i.e., meteorological services, universities or environmental agencies). This paper outlines a total number of 33 datasets, organized into three main categories of meteorological data resources (14 datasets) and four categories of ancillary data resources (19 datasets), selected for their potential to support urban climate studies, but also for their free accessibility. Such a collection cannot be exhaustive, but we aim to draw the attention of the scientific community to relevant datasets, freely available at temporal and spatial resolutions appropriate for urban climatology. Each dataset contains information about its availability, limitations, and examples of research in urban areas.

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“…The use of land-use and land-cover data over the MCMA (Buchhorn et al 2019) indicates that most of natural vegetation has been changed for urban areas (not shown). It is empirically determined that for the MCMA case, the EVI contour of around 0.2 approximately corresponds to urban areas.…”

Section: July 2020 V a R G A S A N D M A G A ñ Amentioning

confidence: 99%

Warm Spells and Climate Risk to Human Health in the Mexico City Metropolitan Area

Vargas

Magaña

2020

Weather, Climate, and Society

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During the second half of the twentieth century, rapid demographic growth and urban expansion led to the development of the Mexico City metropolitan area (MCMA) urban heat island (UHI). The thermal gradient between rural and urban regions is used to define the UHI in the transition zone along the 268C isotherm of mean maximum temperature. As the MCMA expands, more natural vegetation is replaced with urbanization, and the spatial extent of the 268C isotherm grows. The loss of natural vegetation, in a densely populated region of Mexico, leads to the formation of a canopy-layer UHI. The intensification of the MCMA UHI results in an increase in the frequency of daily maximum temperatures above 308C (above 268C on a weekly average), a threshold value that constitutes a natural hazard. Warm-spell occurrences are related to an increase in the number of acute diarrhea diseases (ADD), mainly in zones of the MCMA where the socioeconomic and environmental conditions are low (e.g., insufficient access to potable water). Vulnerable people are mostly located in new settlements along the periphery of the MCMA, where large numbers of hospital discharges due to ADD are reported. The combined effect of more frequent warm spells and increasing vulnerability results in higher levels of risk of suffering this type of health problem, mainly during the warmest part of the year. This analysis may serve to develop UHI mitigation strategies and early warning systems to manage high levels of ADD risk during warm spells.

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Copernicus Global Land Cover Layers—Collection 2

Cited by 717 publications

References 37 publications

A global analysis of song frequency in passerines provides no support for the acoustic adaptation hypothesis but suggests a role for sexual selection

A global analysis of song frequency in passerines provides no support for the acoustic adaptation hypothesis but suggests a role for sexual selection

Meteorological and Ancillary Data Resources for Climate Research in Urban Areas

Warm Spells and Climate Risk to Human Health in the Mexico City Metropolitan Area

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