Sedum-dominated green-roofs in a semi-arid region increase CO2 concentrations during the dry season

Agra, Har’el; Klein, Tamir; Vasl, Amiel; Shalom, Hadar; Kadas, Gyongyver J.; Blaustein, Leon

doi:10.1016/j.scitotenv.2017.01.176

Cited by 17 publications

(8 citation statements)

References 22 publications

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“…This study is part of a larger project [36,37] to study various aspects of arthropod community structure, stormwater management, and pollution abatement on green roofs. For this objective, we used experimental modules on a roof at the University of Haifa.…”

Section: Experimental Designmentioning

confidence: 99%

Vegetation Cover Drives Arthropod Communities in Mediterranean/Subtropical Green Roof Habitats

Salman

Blaustein

2018

Sustainability

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Worldwide, urban areas are expanding both in size and number, which results in a decline in habitats suitable for urban flora and fauna. The construction of urban green features, such as green roofs, may provide suitable habitat patches for many species in urban areas. On green roofs, two approaches have been used to select plants—i.e., matching similar habitat to green roofs (habitat template approach) or identifying plants with suitable traits (plant trait approach). While both approaches may result in suitable habitats for arthropods, how arthropods respond to different combinations of plants is an open question. The aim of this study was to investigate how the structural complexity of different plant forms can affect the abundance and richness of arthropods on green roofs. The experimental design crossed the presence and absence of annuals with three Sedum sediforme (Jacq.) Pau (common name: stonecrops) treatments—i.e., uniformly disrupted Sedum, clumped disrupted Sedum, and no Sedum. We hypothesized that an increased structural diversity due to the coexistence of different life forms of plants on roofs is positively related to the abundance and richness of arthropods. We found that arthropod abundance and richness were positively associated with the percent of vegetation cover and negatively associated with substrate temperature. Neither arthropod abundance nor richness was influenced by the relative moisture of substrate. We also found that arthropod abundance and richness varied by green roof setups (treatments) and by seasonality. Arthropod abundance on green roofs was the highest in treatments with annuals only, while species richness was slightly similar between treatments containing annuals but varied between sampling periods. This study suggests that adding annuals to traditional Sedum roofs has positive effects on arthropods. This finding can support the development of biodiverse cities because most extensive green roofs are inaccessible to the public and can provide undisturbed habitat for several plant and arthropod species.

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Section: Experimental Designmentioning

confidence: 99%

Vegetation Cover Drives Arthropod Communities in Mediterranean/Subtropical Green Roof Habitats

Salman

Blaustein

2018

Sustainability

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“…This finding is consistent with the results of other studies, which show that the largest share of sequestered carbon is related to soil. [36,37] Naghipour et al showed that more than 90% of the total sequestrated carbon is in the form of SOC and less than 10% is in the plant biomass. [38] Considering that the contribution of soil in total carbon sequestration was more than 52.8%, it can be said that soil is the most important reservoir of organic carbon in ecosystems covered by H. colchica.…”

Section: Discussionmentioning

confidence: 99%

Evaluation and economic value of Hedera colchica in urban land management

Mirhosseini,

Saeb,

Kiadaliri

et al. 2023

CLEAN Soil Air Water

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Carbon sequestration is the process of capturing, securing and storing carbon dioxide from the atmosphere. In this study, the carbon sequestration capacity of Hedera colchica was investigated in soil of a semiarid region in Iran. Samples were taken from plants cultivated in the semiarid area of the polluted metropolis of Tehran and the amount of sequestered carbon in the aboveground and underground parts of the plant was measured. The conversion coefficient of carbon sequestration of plant organs (stem, leaf, and root) was determined separately by the combustion method. Carbon tax policy was used to evaluate the carbon sequestration function, as the shadow price of carbon. The results showed a significant difference in the amount of carbon sequestration in different organs of the plant. Stems and roots with 29.3 and 4.3 t ha−1, respectively, showed the highest and lowest amount of carbon deposition. The results of the economic value showed that the carbon shadow price was $40567.6 ha−1 on average. In general, the results of this study showed that the organs of H. colchica can have a beneficial effect in the process of carbon sequestration.

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“…Similarly, during morning rush hours, PM 10 and SO 2 were also reported to be higher than the WHO standards [151]. Apart from this, Agra et al [148] reported that the GRs with Sedum Sediforne added to the high CO 2 concentrations in the city by emitting CO 2 . Regarding PM 2.5 , concentrations near the roof were reported to be reduced as compared to at street level.…”

Section: Air Qualitymentioning

confidence: 97%

Urban Integration of Green Roofs: Current Challenges and Perspectives

Joshi

Teller

2021

Sustainability

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Green roofs (GRs) are a sustainable alternative to conventional roofs that provide multiple ecosystem services. Integrating GRs into urban areas is highly relevant considering the rapidly increasing built-up in cities. Therefore, this paper systematically and comprehensively reviews the recent literature from 2011 to 2019 on GRs to identify the challenges and perspectives related to the urban integration of GRs. The review suggests that the effectiveness of GRs in delivering ecosystem services is largely dependent on context-specific parameters such as weather conditions and existing construction or design-related parameters. Integrating GRs into urban areas can be challenging given the diversity of actors, functions, and conditions characterizing these areas. Although significant research has already been conducted on GRs, research covering more geographical locations and contexts is needed. The review points out the need to include future urbanization scenarios, such as tall buildings while analyzing the impact of GRs on ecological networks. Additionally, the review emphasizes the inclusion of urban morphological parameters alongside an analysis of the impact of GRs on microclimate regulation and air quality. In terms of social acceptance, this review points out the need to consider the temporal cycles of vegetation for noting users’ perspectives. Additionally, further research is required on the social impact of GRs, considering their influence on property prices. Lastly, the review stresses the need for more city-scale studies on the impact of GRs on ecosystem services.

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Sedum-dominated green-roofs in a semi-arid region increase CO2 concentrations during the dry season

Cited by 17 publications

References 22 publications

Vegetation Cover Drives Arthropod Communities in Mediterranean/Subtropical Green Roof Habitats

Vegetation Cover Drives Arthropod Communities in Mediterranean/Subtropical Green Roof Habitats

Evaluation and economic value of Hedera colchica in urban land management

Urban Integration of Green Roofs: Current Challenges and Perspectives

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