Identifying Tree Traits for Cooling Urban Heat Islands—A Cross-City Empirical Analysis

Helletsgruber, Carola; Gillner, Sten; Gulyás, Ágnes; Junker, Robert R.; Tanács, Eszter; Hof, Angela

doi:10.3390/f11101064

Cited by 21 publications

(5 citation statements)

References 30 publications

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“…SLA was found to have the strongest positive association (+ 1) with most ES, including biomass production, water regulation, nutrient cycling, litter decomposition, and aesthetic appeal, and a strong negative association with phytoremediation (− 1). However, some of the ES (biomass production, water regulation, litter decomposition) has the exact opposite associations with LDMC, which have also been confirmed earlier in several studies focusing on trait-service linkages (Bihuňová et al 2021;Cebrian-Piqueras et al 2021;Helletsgruber et al 2020;Tasset et al 2019;Yang et al 2019). LA, LNC, root length, and root density also had similar linkage associations to SLA; however, it varies, probably due to the limited focus on these traits compared to SLA and LDMC.…”

Section: Trait-service Associationsupporting

confidence: 76%

Mapping Peer-Reviewed Scientific Studies on Plant Trait–Service Linkages Across Ecosystems: A Bibliometric Analysis

et al. 2023

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The concept of ‘ecosystem service’ has gained momentum in the twenty-first century to bridge the gap between human–nature interactions. However, the challenge remains to map the flow of ecosystem services (ES) for their efficient management. Among the multiple existing methods, biophysical assessments provide better knowledge of the state of the ecosystem and its mapping for complimentary services. Trait–service linkage is one of the tools to reliably link biodiversity with ES if we better understand the role functional traits play in the underlying ecosystem processes. In this paper, we have performed a bibliometric analysis of published literature on ES and plant functional traits to identify the current state of knowledge on trait–service linkage, biases, research gaps, and challenges. There was a skewed geographical basis for trait–service linkage studies; most studies were conducted in Europe and North America. The majority of the research focused on supporting and regulating ES, mainly carbon sequestration, biomass production, and climate regulation, using a particular set of vegetative traits, such as leaf, root, and plant height, and ignored most regeneration traits, except for a few flower traits. A matrix to quantify the association between ES and selected plant traits (specific leaf area, leaf dry matter content, leaf area, leaf nitrogen content, vegetation height, wood density, canopy density, root length, root density, flowering time, flower color and flower size) revealed that the two leaf traits (specific leaf area and leaf dry matter content) in the linkage have contrasting associations with multiple ES. The study illustrated that there is still a considerable research gap in linking plant traits with essential ES (biomass production, climate and water regulation). Thus, suggest future studies on ES should focus more on trait–service linkage across major ecosystems to underpin key ecosystem processes for better sustenance of ES and human well-being. Supplementary Information The online version contains supplementary material available at 10.1007/s44177-023-00048-2.

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Section: Trait-service Associationsupporting

confidence: 76%

Mapping Peer-Reviewed Scientific Studies on Plant Trait–Service Linkages Across Ecosystems: A Bibliometric Analysis

et al. 2023

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“…Since we were more interested in the smaller plot level, our results are more comparable to studies on the effect of individual trees in urban landscapes. A study by Helletsgruber et al (2020) demonstrates that total canopy height and canopy area are more important tree variables in determining air temperature cooling beneath a shade tree compared to LAI measurements in urban European environments. However, in the urban forestry literature, canopy height is often associated with surface temperature cooling rather than air temperature, due to the influence of the area and duration of tree shading directly on surfaces (Rahman et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Shade tree traits and microclimate modifications: Implications for pathogen management in biodiverse coffee agroforests

et al. 2021

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Diversified agroforestry systems are characterized by the deliberate planting and retention of both native and non-native tree species.This enhanced diversity contributes many important ecosystem features (e.g., habitat; Perfecto et al., 1996) and processes (e.g., nutrient cycling; Isaac & Borden, 2019). However, one often overlooked but important modification in biodiverse agroforests is the modifica-

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“…Canopy temperature can be a direct measure for the health of urban trees [14]. Many studies have been conducted acknowledging the importance of the relationship between wildfires and surface temperatures [15,16]. In addition to forests, studies have also been conducted to monitor the changes in trees and distinct types of vegetation in urban areas and the consequences of these changes in terms of urban heat islands [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been conducted acknowledging the importance of the relationship between wildfires and surface temperatures [15,16]. In addition to forests, studies have also been conducted to monitor the changes in trees and distinct types of vegetation in urban areas and the consequences of these changes in terms of urban heat islands [15,16]. There are a variety of issues interlinked with the increase in surface temperatures; for example, trend analyses of forest fire hot spots were carried out for the western Himalyians to check their relationship with LST.…”

Section: Introductionmentioning

confidence: 99%

Unveiling Temperature Patterns in Tree Canopies across Diverse Heights and Types

2023

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Forests are some of the major ecosystems that help in mitigating the effects of climate change. Understanding the relation between the surface temperatures of different vegetation and trees and their heights is very crucial in understanding events such as wildfires. In this work, relationships between tree canopy temperature and canopy height with respect to vegetation types were extracted. The southern part of Sardinia Island, which has dense forests and is often affected by wildfires, was selected as the region of interest. PRISMA hyperspectral imagery has been used to map all the available vegetation types in the region of interest using the support vector machine classifier with an accuracy of >80% for all classes. The Global Ecosystem Dynamics Investigation’s (GEDI) L2A Raster Canopy Top Height product provides canopy height measurements in spatially discrete footprints, and to overcome this issue of discontinuous sampling, Random Forest Regression was used on Sentinel-1 SAR data, Sentinel-2 multispectral data, and the Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM) to estimate the canopy heights of various vegetation classes, with a root mean squared error (RMSE) value of 2.9176 m and a coefficient of determination (R2) value of 0.791. Finally, the Moderate Resolution Imaging Spectroradiometer (MODIS) Land Surface Temperature (LST) and emissivity product provides ground surface temperature regardless of land use and land cover (LULC) types. LST measurements over tree canopies are considered as the tree canopy temperature. We estimated the relationship between the canopy temperature of five vegetation types (evergreen oak, olive, juniper, silicicole, riparian trees) and the corresponding canopy heights and vegetation types. The resulting scatter plots showed that lower tree canopy temperatures correspond with higher tree canopies with a correlation coefficient in the range of −0.4 to −0.5 for distinct types of vegetation.

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Identifying Tree Traits for Cooling Urban Heat Islands—A Cross-City Empirical Analysis

Cited by 21 publications

References 30 publications

Mapping Peer-Reviewed Scientific Studies on Plant Trait–Service Linkages Across Ecosystems: A Bibliometric Analysis

Mapping Peer-Reviewed Scientific Studies on Plant Trait–Service Linkages Across Ecosystems: A Bibliometric Analysis

Shade tree traits and microclimate modifications: Implications for pathogen management in biodiverse coffee agroforests

Unveiling Temperature Patterns in Tree Canopies across Diverse Heights and Types

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