Google Earth Engine for geo-big data applications: A meta-analysis and systematic review

ISPRS Journal of Photogrammetry and Remote Sensing, Год журнала: 2020, Номер 164, С. 152 - 170

Опубликована: Май 7, 2020

Язык: Английский

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Machine Learning Classification of Mediterranean Forest Habitats in Google Earth Engine Based on Seasonal Sentinel-2 Time-Series and Input Image Composition Optimisation

Remote Sensing, Год журнала: 2021, Номер 13(4), С. 586 - 586

Опубликована: Фев. 7, 2021

The sustainable management of natural heritage is presently considered a global strategic issue. Owing to the ever-growing availability free data and software, remote sensing (RS) techniques have been primarily used map, analyse, monitor resources for conservation purposes. need adopt multi-scale multi-temporal approaches detect different phenological aspects vegetation types species has also emerged. time-series composite image approach allows capturing much spectral variability, but presents some criticalities (e.g., time-consuming research, downloading data, required storage space). To overcome these issues, Google Earth engine (GEE) proposed, cloud-based computational platform that users access process remotely sensed at petabyte scales. application was tested in protected area Calabria (South Italy), which particularly representative Mediterranean mountain forest environment. In random (RF), support vector machine (SVM), classification regression tree (CART) algorithms were perform supervised pixel-based based on use Sentinel-2 images. A select best input (seasonal composition strategies, statistical operators, band composition, derived indices (VIs) information) implemented. set accuracy indicators, including overall (OA) multi-class F-score (Fm), computed assess results classifications. GEE proved be reliable powerful tool process. (OA = 0.88 Fm 0.88) achieved using RF with summer composite, adding three VIs (NDVI, EVI, NBR) bands. SVM produced OAs 0.83 0.80, respectively.

Язык: Английский

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Traits shaping urban tolerance in birds differ around the world

Current Biology, Год журнала: 2023, Номер 33(9), С. 1677 - 1688.e6

Опубликована: Апрель 5, 2023

As human density increases, biodiversity must increasingly co-exist with urbanization or face local extinction. Tolerance of urban areas has been linked to numerous functional traits, yet few globally consistent patterns have emerged explain variation in tolerance, which stymies attempts at a generalizable predictive framework. Here, we calculate an Urban Association Index (UAI) for 3,768 bird species 137 cities across all permanently inhabited continents. We then assess how this UAI varies as function ten species-specific traits and further test whether the strength trait relationships vary three city-specific variables. Of nine were significantly associated tolerance. Urban-associated tend be smaller, less territorial, greater dispersal ability, broader dietary habitat niches, larger clutch sizes, longevity, lower elevational limits. Only bill shape showed no global association Additionally, several varied latitude and/or population density. For example, associations body mass diet breadth more pronounced higher latitudes, while territoriality longevity reduced Thus, importance filters birds predictably cities, indicating biogeographic selection tolerance that could prior challenges search patterns. A informed framework predicts will integral conservation increasing proportions world's are impacted by urbanization.

Язык: Английский

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Heterogeneous urban green areas are bird diversity hotspots: insights using continental-scale citizen science data

Landscape Ecology, Год журнала: 2019, Номер 34(6), С. 1231 - 1246

Опубликована: Июнь 1, 2019

Язык: Английский

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Capitalizing on opportunistic citizen science data to monitor urban biodiversity: A multi-taxa framework

Biological Conservation, Год журнала: 2020, Номер 251, С. 108753 - 108753

Опубликована: Сен. 4, 2020

Язык: Английский

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EVI and NDVI as proxies for multifaceted avian diversity in urban areas

Ecological Applications, Год журнала: 2023, Номер 33(3)

Опубликована: Янв. 24, 2023

Abstract Most ecological studies use remote sensing to analyze broad‐scale biodiversity patterns, focusing mainly on taxonomic diversity in natural landscapes. One of the most important effects high levels urbanization is species loss (i.e., biotic homogenization). Therefore, cost‐effective and more efficient methods monitor biological communities' distribution are essential. This study explores whether Enhanced Vegetation Index (EVI) Normalized Difference (NDVI) can predict multifaceted avian diversity, urban tolerance, specialization We sampled bird communities among 15 European cities extracted Landsat 30‐meter resolution EVI NDVI values pixels within a 50‐m buffer sample points using Google Earth Engine (32‐day 8 Collection Tier 1). Mixed models were used find best associations NDVI, predicting multiple facets: Taxonomic functional phylogenetic levels, tolerance. A total 113 across from 10 different countries detected. mean was predictor for foraging substrate specialization. richness evenness, variability, community evolutionary distinctiveness, diet behavior, habitat specialists. Finally, standard deviation not predictors any facets studied. Our findings expand previous knowledge about as surrogates at continental scale. Considering Commission's proposal Nature Restoration Law calling expanding green space areas by 2050, we propose proxy efficiently responses land changes cities.

Язык: Английский

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Promoting urban ecological resilience through the lens of avian biodiversity

Frontiers in Ecology and Evolution, Год журнала: 2024, Номер 12

Опубликована: Март 14, 2024

The significance of urban landscapes in safeguarding biodiversity is often disregarded, even though a considerable amount conservation focus directed toward hotspots where land conversion happening at the fastest pace. Maintaining areas not only benefits environment, but along with social, economic, and technological factors can increase stability systems to disturbance, concept known as “urban resilience”. In this synthesis paper, we explore ecological dimension resilience specifically on avian because birds are easy observe, relatively abundant, serve an indicator overall health environments. We first examine discuss role environmental stressors associated urbanization ongoing crisis. then provide overview characteristics environment that may promote birds, associations between social economic resilience. Finally, recommendations future research regarding strategies improve thus, whole, intersections ecology, ecosystem justice, planning. Since 68% world’s population projected live by 2050, it imperative scientists, planners, civil engineers, architects, others consider both cities natural anthropogenic stressors.

Язык: Английский

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Residential yard management and landscape cover affect urban bird community diversity across the continental USA

Ecological Applications, Год журнала: 2021, Номер 31(8)

Опубликована: Сен. 15, 2021

Urbanization has a homogenizing effect on biodiversity and leads to communities with fewer native species lower conservation value. However, few studies have explored whether or how land management by urban residents can ameliorate the deleterious effects of this homogenization composition. We tested local (land management) neighborhood-scale (impervious surface tree canopy cover) features breeding bird diversity in six US metropolitan areas that differ regional pools climate. used Bayesian multiregion community model assess differences richness, functional guild turnover, population vulnerability, public interest each types: two natural area park types (separate adjacent residential areas), yard (wildlife-certified water conservation) lawn-dominated (high- low-fertilizer application), surrounding features. Species richness was higher yards compared parks; however, parks supported high scores while interest. Bird all were composed primarily species. Within types, strongly positively associated cover negatively impervious surface. At continental scale, turnover between cities lowest highest parks. cities, high-fertilizer wildlife-certified Our results demonstrate that, across regions, preserving areas, minimizing surfaces increasing are essential strategies conserve regionally important yards, especially those managed for wildlife support diverse, heterogeneous potential concern. Management approaches include preservation protected parks, encourage wildlife-friendly acknowledge birds advance successful American landscapes.

Язык: Английский

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A methodological framework to create an urban greenway network promoting avian connectivity: A case study of Curitiba City

Urban forestry & urban greening, Год журнала: 2023, Номер 87, С. 128050 - 128050

Опубликована: Авг. 9, 2023

Язык: Английский

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Autumn stopover hotspots and multiscale habitat associations of migratory landbirds in the eastern United States

Proceedings of the National Academy of Sciences, Год журнала: 2023, Номер 120(3)

Опубликована: Янв. 9, 2023

Halting the global decline of migratory birds requires a better understanding migration ecology. Stopover sites are crucial yet understudied aspect bird conservation, mostly due to challenges associated with broad-scale patterns transient habitat use. Here, we use national network weather radar stations identify stopover hotspots and assess multiscale associations landbirds across eastern United States during autumn migration. We mapped seasonal densities over 5 y (2015 2019) from 60 covering 63.2 million hectares. At coarse scale, found that migrate broad front small differences in migrant density between domains. However, relatively more concentrate along Mississippi River Appalachian Mountains. finer identified pixels consistently harbored high migrants for all y, which classify as hotspots. Hotspot probability increased percent cover forest types decreased pasture cultivated crops. Moreover, strong concentrating effects deciduous patches within deforested regions. also prairie biome Midwest (now cropland) is likely barrier, large concentrations at prairie-forest boundary after crossing agricultural Midwest. Overall, broad-front pattern highlights importance locally based conservation efforts protect habitats. Such should target forests, especially forests highly altered landscapes. These findings demonstrate value assessments landbirds.

Язык: Английский

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