Serviceable tree volume: An alternative tool to assess ecosystem services provided by ornamental trees in urban forests

Lee, Louis S.H.; Hao, Zhang; Jim, Chi Yung

doi:10.1016/j.ufug.2021.127003

Cited by 16 publications

(7 citation statements)

References 54 publications

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“…A combination of multiple remote-sensing data can greatly improve the classification of street species (Liao et al, 2018;Lee et al, 2021). For example, multispectral/hyperspectral data contain rich texture and phenological features (Fassnacht et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Considering the composite tree attributes extracted by UAV can improve the accuracy of street tree species classification

Tang,

Miao,

Yang

et al. 2024

Dendrobiology

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Identifying simple tree attributes of street trees, i.e., tree height, crown width and crown height obtained by unmanned aerial vehicles (UAV), plays a significant role in urban management to maximize the ecological benefits of street trees. However, simple attributes usually fluctuate over a wide range due to differences in tree-age and growing environment, leading to inconspicuous interspecific features and low classification accuracy. Composite attributes, expressed by two or more simple attributes, can be used to reduce the variability in simple tree attributes, thus providing an alternative to improve the accuracy of street tree classification. In this study, we examined the classification effects of simple attributes and simple-composite attribute combinations by back propagation (BP) neural network, K-nearest neighbor (KNN) and support vector machine (SVM). The results showed that (1) the values obtained by UAVs and observations were highly consistent and R2 values for tree height, east-west crown width, north-south crown width and crown height were 0.90, 0.87, 0.78 and 0.76, respectively. The relative errors of tree height were the most stable among different tree species, followed by the crown height, east-west crown width and north-south crown width. (2) Compared to simple attributes, composite attributes displayed significant differences among street tree species, and these differences were helpful for identifying street tree species that could not be identified with simple attributes. (3) The accuracy of tree species identification after including corresponding composite attributes can be improved by 29.7% (kappa coefficient improved by 0.34) compared with only using simple attributes. The results suggested that consideration of composite attributes in street tree species classification reduced the mistakes for identifying tree species, thus providing a new approach for identifying street tree species and managing street trees efficiently.

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Section: Discussionmentioning

confidence: 99%

Considering the composite tree attributes extracted by UAV can improve the accuracy of street tree species classification

Tang,

Miao,

Yang

et al. 2024

Dendrobiology

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“…In reality, ecosystem services/functions such as diversity of forests, especially urban forests [76], are seriously influenced by regional geographic and human environments. In addition, some ecosystem services are intangible, e.g., cultural ecosystem [77], but the equation used in this study may be limited in reflecting these services. All these limitations or weaknesses brought more or less uncertainty to the research results.…”

Section: Limitationsmentioning

confidence: 99%

Assessing Changes in the Value of Forest Ecosystem Services in Response to Climate Change in China

Xiao

2022

Sustainability

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Ecosystem services are the basis of human survival and development and play an irreplaceable role in maintaining the dynamic balance of the earth’s life support system and environment. This study evaluated the annual forest ecosystem service values (ESVs) and their spatial evolution characteristics from 2001 to 2020 in China and revealed the impact of climatic factors as well. The equivalent factor method was applied to calculate ESVs in combination with net primary productivity (NPP) calculated by the CASA model. The water conservation results based on the InVEST model and equivalent factor method were compared to test the reliability of the method. From 2001 to 2020, the annual forest ESVs ranged from RMB 9.17 trillion to 10.81 trillion, with an average of RMB 9.99 trillion in China. The forest ESVs increased from the northwest to the southeast regions of China with the lowest values of less than RMB 3 million per square kilometer and relatively high values of more than RMB 9 million per square kilometer. In the past 20 years, the forest ESVs have shown a significant increasing trend, especially in the Northeast Forest Region and Southeast Forest Region. The ESVs have decreased only in very few forest areas such as Cuona and Motuo counties on the southern edge of Tibet Province in Southwest China and Pingtung and Kaohsiung counties in southern Taiwan. The mean annual forest ESV was necessarily higher in the recent 10 years (2011–2020, RMB 10.43 trillion) than in the previous 10 years (2001–2010, RMB 9.55 trillion), while the spatial growth rate was usually less than 20%. The annual forest ESVs were significantly correlated with temperature, precipitation and evapotranspiration but not with sunshine hours and relative humidity across the 20 years. In most areas (>60%), the positive impact of various climatic factors was dominant, and the area positively affected by precipitation was the largest (76%). The mean annual forest water conservation from 2001 to 2020 was RMB 1.46 trillion based on the InVEST model and was RMB 1.77 trillion based on the equivalent factor method. Overall, the results obtained by the two methods are roughly equal and mostly spatially matched. This study has some guiding significance for utilizing resources rationally, strengthening ecological environment protection and improving adaptability to climate change.

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“…Among the features developed by plants to tolerate arid environments and reduce water loss are the modification of the shape or leaves orientation, reduction on leaf and shoot growth, closure of stomata, higher thickness, decreased leaf area, and trichomes (Nazemi Rafi et al 2019). Similar, the few porosity of the soil can also be a limiting factor to the development of plants, especially for ornamental trees planted in urban spaces, since soil compaction can lead to deformation and consequent loss of its landscape function as well as compromise the safety of residents (Lee et al 2021).…”

Section: Environmental Factors Influencing the Grow And Phytoremediation Capacitymentioning

confidence: 99%

Phytoremediation by ornamental plants: a beautiful and ecological alternative

Rocha

Kochi

et al. 2021

Environ Sci Pollut Res

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Phytoremediation is an eco-friendly and economical technology in which plants are used for the removal of contaminants presents in the urban and rural environment. One of the challenges of the technique is the proper destination of the biomass of plants. In this context, the use of ornamental plants in areas under contamination treatment improves landscape, serving as a tourist option and source of income with high added value. In addition to their high stress tolerance, rapid growth, high biomass production, and good root development, ornamental species are not intended for animal and human food consumption, avoiding the introduction of contaminants into the food web in addition to improving the environments with aesthetic value. Furthermore, ornamental plants provide multiple ecosystem services, and promote human well-being, while contributing to the conservation of biodiversity. In this review, we summarized the main uses of ornamental plants in phytoremediation of contaminated soil, air, and water. We discuss the potential use of ornamental plants in constructed buffer strips aiming to mitigate the contamination of agricultural lands occurring in the vicinity of sources of contaminants. Moreover, we underlie the ecological and health benefits of the use of ornamental plants in urban and rural landscape projects. This study is expected to draw attention to a promising decontamination technology combined with the beautification of urban and rural areas as well as a possible alternative source of income and diversification in horticultural production.

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Serviceable tree volume: An alternative tool to assess ecosystem services provided by ornamental trees in urban forests

Cited by 16 publications

References 54 publications

Considering the composite tree attributes extracted by UAV can improve the accuracy of street tree species classification

Considering the composite tree attributes extracted by UAV can improve the accuracy of street tree species classification

Assessing Changes in the Value of Forest Ecosystem Services in Response to Climate Change in China

Phytoremediation by ornamental plants: a beautiful and ecological alternative

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